fix balancing config

bin/app/data/config/modules.toml

@@ -10,7 +10,7 @@ glyph = "L"
 
 [module.weapon]
 damage_formula = "2"
-attack_range_formula = "5"
+attack_range_formula = "50"
 attack_rate_formula = "2.0"
 
 [[module]]
@@ -24,7 +24,7 @@ fill_color = "#AACC44"
 glyph = "Sv"
 
 [module.salvage]
-collection_range_formula = "50"
+collection_range_formula = "500"
 cargo_capacity_formula = "10"
 collection_rate_formula = "0.5"
 
@@ -40,4 +40,4 @@ glyph = "Rp"
 
 [module.repair]
 repair_rate_formula = "5 + x"
-repair_range_formula = "80"
+repair_range_formula = "800"

bin/app/data/config/ships.toml

@@ -16,14 +16,14 @@ cost_formula = "10"
 hp_formula = "3"
 
 [ship.movement]
-speed_formula = "4"
+speed_formula = "40"
-main_acceleration_formula = "8"
+main_acceleration_formula = "80"
-maneuvering_acceleration_formula = "4"
+maneuvering_acceleration_formula = "40"
 angular_acceleration_formula = "12.56"
 max_rotation_speed_formula = "6.28"
 
 [ship.sensor]
-sensor_range_formula = "15"
+sensor_range_formula = "150"
 
 [ship.loot]
 scrap_drop = 2

bin/app/data/config/stations.toml

@@ -14,7 +14,7 @@ surface_mask = [
 level = 1
 hp_formula = "300"
 damage_formula = "5"
-range_formula = "20"
+range_formula = "200"
 fire_rate_formula = "1"
 scrap_drop_formula = "10"
 
@@ -25,6 +25,6 @@ surface_mask = [
 ]
 hp_formula = "300 + 150*x"
 damage_formula = "2 + 1*x"
-range_formula = "20"
+range_formula = "200"
 fire_rate_formula = "1.0 + 0.2*x"
 scrap_drop_formula = "10 + 5*x"

bin/app/data/config/world.toml

@@ -3,7 +3,8 @@ height_tiles = 30
 refund_percentage = 75
 starting_building_blocks = 1000
 scrap_despawn_seconds = 30
-belt_speed_tiles_per_second = 2
+tile_size_m = 10
+belt_speed_mps = 20
 tunnel_max_distance = 10
 departure_interval_seconds = 20
 

bin/balancing/data/balancing.toml

@@ -8,91 +8,21 @@ enemy_buffer_width = 10
   [[arena.team]]
   name = "Alpha"
     [[arena.team.ship]]
-    schematic = "fighter"
+    schematic = "drone"
     level = 1
     count = 5
     modules = [
       {type = "laser_cannon",  x = 1, y = 1, rotation = "east"},
-      {type = "weapon_upgrade", x = 0, y = 1, rotation = "east"},
-      {type = "sensor_booster", x = 2, y = 1, rotation = "east"},
     ]
 
   [[arena.team]]
   name = "Beta"
     [[arena.team.ship]]
-    schematic = "sniper"
+    schematic = "drone"
     level = 1
     count = 1
     modules = [
       {type = "laser_cannon",  x = 1, y = 1, rotation = "east"},
-      {type = "armor_plate",   x = 1, y = 0, rotation = "east"},
-      {type = "weapon_upgrade", x = 1, y = 2, rotation = "east"},
-    ]
-
-
-[[arena]]
-name = "Sniper vs Gunship"
-height_tiles = 20
-player_buffer_width = 10
-contest_zone_width = 60
-enemy_buffer_width = 10
-
-  [[arena.team]]
-  name = "Alpha"
-    [[arena.team.ship]]
-    schematic = "sniper"
-    level = 1
-    count = 1
-    modules = [
-      {type = "laser_cannon",  x = 1, y = 1, rotation = "east"},
-      {type = "armor_plate",    x = 1, y = 0, rotation = "east"},
-      {type = "sensor_booster", x = 0, y = 1, rotation = "east"},
-    ]
-
-  [[arena.team]]
-  name = "Beta"
-    [[arena.team.ship]]
-    schematic = "gunship"
-    level = 1
-    count = 1
-    modules = [
-      {type = "laser_cannon",  x = 2, y = 1, rotation = "east"},
-      {type = "armor_plate",    x = 1, y = 0, rotation = "east"},
-      {type = "weapon_upgrade", x = 3, y = 1, rotation = "east"},
-      {type = "engine_booster", x = 0, y = 1, rotation = "east"},
-    ]
-
-
-[[arena]]
-name = "Gunship vs Fighters"
-height_tiles = 20
-player_buffer_width = 10
-contest_zone_width = 60
-enemy_buffer_width = 10
-
-  [[arena.team]]
-  name = "Alpha"
-    [[arena.team.ship]]
-    schematic = "gunship"
-    level = 1
-    count = 1
-    modules = [
-      {type = "laser_cannon",  x = 2, y = 2, rotation = "east"},
-      {type = "armor_plate",    x = 1, y = 0, rotation = "east"},
-      {type = "weapon_upgrade", x = 3, y = 2, rotation = "east"},
-      {type = "engine_booster", x = 0, y = 1, rotation = "east"},
-    ]
-
-  [[arena.team]]
-  name = "Beta"
-    [[arena.team.ship]]
-    schematic = "fighter"
-    level = 1
-    count = 5
-    modules = [
-      {type = "laser_cannon",  x = 1, y = 1, rotation = "east"},
-      {type = "engine_booster", x = 1, y = 0, rotation = "east"},
-      {type = "sensor_booster", x = 2, y = 1, rotation = "east"},
     ]
 
 
@@ -106,13 +36,11 @@ enemy_buffer_width = 15
   [[arena.team]]
   name = "Fortified"
     [[arena.team.ship]]
-    schematic = "fighter"
+    schematic = "drone"
     level = 1
     count = 3
     modules = [
       {type = "laser_cannon",   x = 1, y = 1, rotation = "east"},
-      {type = "weapon_upgrade", x = 2, y = 1, rotation = "east"},
-      {type = "sensor_booster", x = 1, y = 0, rotation = "east"},
     ]
     [[arena.team.station]]
     type = "player_station"
@@ -128,10 +56,9 @@ enemy_buffer_width = 15
   [[arena.team]]
   name = "Swarm"
     [[arena.team.ship]]
-    schematic = "fighter"
+    schematic = "drone"
     level = 1
     count = 8
     modules = [
       {type = "laser_cannon",  x = 1, y = 1, rotation = "east"},
-      {type = "engine_booster", x = 1, y = 0, rotation = "east"},
     ]

bin/test/data/config/modules.toml

@@ -22,7 +22,7 @@ fill_color = "#40A0FF"
 glyph = "S"
 
 [module.sensor]
-added_sensor_range_formula = "10"
+added_sensor_range_formula = "100"
 
 [[module]]
 id = "weapon_upgrade"
@@ -49,7 +49,7 @@ glyph = "L"
 
 [module.weapon]
 damage_formula = "2"
-attack_range_formula = "5"
+attack_range_formula = "50"
 attack_rate_formula = "2.0"
 
 [[module]]
@@ -63,7 +63,7 @@ fill_color = "#AACC44"
 glyph = "Sv"
 
 [module.salvage]
-collection_range_formula = "50"
+collection_range_formula = "500"
 cargo_capacity_formula = "10"
 collection_rate_formula = "0.5"
 
@@ -79,4 +79,4 @@ glyph = "Rp"
 
 [module.repair]
 repair_rate_formula = "5 + x"
-repair_range_formula = "80"
+repair_range_formula = "800"

bin/test/data/config/ships.toml

@@ -16,14 +16,14 @@ cost_formula = "5 + 1*x"
 hp_formula = "40 + 5*x"
 
 [ship.movement]
-speed_formula               = "200 + 5*x"
+speed_formula               = "2000 + 50*x"
-main_acceleration_formula         = "100000"
+main_acceleration_formula         = "1000000"
-maneuvering_acceleration_formula  = "100000"
+maneuvering_acceleration_formula  = "1000000"
 angular_acceleration_formula              = "100000"
 max_rotation_speed_formula  = "100000"
 
 [ship.sensor]
-sensor_range_formula = "200"
+sensor_range_formula = "2000"
 
 [ship.loot]
 scrap_drop = 2
@@ -47,14 +47,14 @@ cost_formula = "10 + 2*x"
 hp_formula = "120 + 15*x"
 
 [ship.movement]
-speed_formula               = "120"
+speed_formula               = "1200"
-main_acceleration_formula         = "100000"
+main_acceleration_formula         = "1000000"
-maneuvering_acceleration_formula  = "100000"
+maneuvering_acceleration_formula  = "1000000"
 angular_acceleration_formula              = "100000"
 max_rotation_speed_formula  = "100000"
 
 [ship.sensor]
-sensor_range_formula = "300"
+sensor_range_formula = "3000"
 
 [ship.loot]
 scrap_drop = 4
@@ -77,14 +77,14 @@ cost_formula = "0"
 hp_formula = "40 + 4*x"
 
 [ship.movement]
-speed_formula               = "110"
+speed_formula               = "1100"
-main_acceleration_formula         = "100000"
+main_acceleration_formula         = "1000000"
-maneuvering_acceleration_formula  = "100000"
+maneuvering_acceleration_formula  = "1000000"
 angular_acceleration_formula              = "100000"
 max_rotation_speed_formula  = "100000"
 
 [ship.sensor]
-sensor_range_formula = "250"
+sensor_range_formula = "2500"
 
 [ship.loot]
 scrap_drop = 2
@@ -107,14 +107,14 @@ cost_formula = "0"
 hp_formula = "60 + 5*x"
 
 [ship.movement]
-speed_formula               = "130"
+speed_formula               = "1300"
-main_acceleration_formula         = "100000"
+main_acceleration_formula         = "1000000"
-maneuvering_acceleration_formula  = "100000"
+maneuvering_acceleration_formula  = "1000000"
 angular_acceleration_formula              = "100000"
 max_rotation_speed_formula  = "100000"
 
 [ship.sensor]
-sensor_range_formula = "250"
+sensor_range_formula = "2500"
 
 [ship.loot]
 scrap_drop = 2

bin/test/data/config/stations.toml

@@ -14,7 +14,7 @@ surface_mask = [
 level = 5
 hp_formula = "300 + 40*x"
 damage_formula = "5 + 4*x"
-range_formula = "300 + 20*x"
+range_formula = "3000 + 200*x"
 fire_rate_formula = "0.5 + 0.2*x"
 scrap_drop_formula = "x"
 
@@ -25,6 +25,6 @@ surface_mask = [
 ]
 hp_formula = "300 + 150*x"
 damage_formula = "20 + 10*x"
-range_formula = "350 + 20*x"
+range_formula = "3500 + 200*x"
 fire_rate_formula = "1.0 + 0.2*x"
 scrap_drop_formula = "10 + 5*x"

bin/test/data/config/world.toml

@@ -3,7 +3,8 @@ height_tiles = 60
 refund_percentage = 75
 starting_building_blocks = 100
 scrap_despawn_seconds = 30
-belt_speed_tiles_per_second = 2
+tile_size_m = 10
+belt_speed_mps = 20
 tunnel_max_distance = 10
 departure_interval_seconds = 20
 

modular_ships.md

@@ -1,87 +0,0 @@
-# Modular Ships: Remove Ship Roles, Unify Capabilities as Modules
-
-## Why
-
-Ships currently have a fixed role (combat, salvage, repair) baked into their definition. This limits ship customization — a ship is either a fighter or a salvage ship, never both. By moving weapon, salvage cargo, and repair tool capabilities into the module system, players can freely compose ship loadouts. A single hull can carry two weapons and a repair tool, or a weapon and a salvage bay, etc.
-
-## What Changes
-
-### Ship definitions lose role-specific sections
-
-`ShipDef` drops `std::optional<ShipCombat>`, `std::optional<ShipSalvage>`, `std::optional<ShipRepair>`. Ships define only hull stats (HP, movement, sensor) and a layout grid. A new `default_modules` list is added per schematic for enemy wave ships (see below).
-
-### Capability modules replace roles
-
-New module types in `modules.toml` provide capabilities. A module with base stat formulas (e.g. `damage_formula`) under a capability section (`[module.weapon]`, `[module.salvage]`, `[module.repair]`) is a **capability module** that creates a child entity. A module with only `added_*`/`multiplied_*` formulas is a **passive module** that modifies stats.
-
-Example capability module:
-```toml
-[[module]]
-id = "laser_turret"
-[module.weapon]
-damage_formula = "5 + 2*x"       # x = module's player_production_level
-attack_range_formula = "8 + x"
-attack_rate_formula = "1.5 + 0.1*x"
-```
-
-Example passive module boosting weapons:
-```toml
-[[module]]
-id = "weapon_upgrade"
-[module.weapon]
-multiplied_damage_formula = "1.0 + 0.15 * x"
-```
-
-Example passive module boosting ship stats:
-```toml
-[[module]]
-id = "armor_plate"
-[module.health]
-multiplied_hp_formula = "1.0 + 0.2 * x"
-```
-
-### Capability modules become child entities
-
-Each placed capability module instance becomes its own entt entity with a `ModuleOwnerComponent { entt::entity ship }` linking it to the parent ship. This allows multiple instances of the same type (e.g. three weapons, each with independent stats, cooldown, and target).
-
-A new `ModuleOwnerComponent` is introduced:
-```cpp
-struct ModuleOwnerComponent
-{
-    entt::entity ship;
-};
-```
-
-### Passive modifiers apply to both ship and module entities
-
-During spawn, passive module modifiers are collected and routed by category:
-- `[module.health]`, `[module.movement]`, `[module.sensor]` modifiers apply to the ship entity's hull stats.
-- `[module.weapon]` modifiers apply to every weapon child entity on the ship.
-- `[module.repair]` modifiers apply to every repair child entity on the ship.
-- `[module.salvage]` modifiers apply to every salvage child entity on the ship.
-
-Capability module child entities must be created first, then passive modifiers are applied. The formula variable `x` is always the module's `player_production_level`.
-
-### Behavior components stay on the ship entity
-
-`ThreatResponseBehaviorComponent`, `SalvageBehaviorComponent`, `RepairBehaviorComponent` remain on the ship entity (they drive movement). They are attached if the ship has at least one module of the corresponding type.
-
-### Hybrid ships are allowed
-
-A ship may have modules of different capability types. Movement arbitration currently uses last-writer-wins (the last behavior system ticked sets the intent). This is acceptable for now; dynamic priority-based arbitration will be added later.
-
-### Systems query module entities
-
-Weapon, repair, and salvage tick systems query for their component + `ModuleOwnerComponent` and resolve position from the owner ship. Each module instance ticks independently.
-
-### Despawn cleans up child entities
-
-`ShipSystem::despawn` destroys the ship entity and all module entities whose `ModuleOwnerComponent::ship` matches it.
-
-### Enemy wave ships use default modules
-
-Since weapons are now modules, enemy ships need modules to fight. Each ship schematic in `ships.toml` defines a `default_modules` list (same format as layout blueprints). Wave-spawned enemy ships are instantiated with this module layout. If `default_modules` is absent or empty, the ship spawns with no modules (and therefore no combat/salvage/repair capability).
-
-### Visuals use per-schematic colors instead of per-role
-
-`visuals.toml` defines fill/outline colors and glyphs per ship schematic (e.g. fighter, sniper, gunship) rather than per role (combat, salvage, repair). Debug draw sensor circles use the schematic's outline color.

src/balancing/ArenaSimulation.cpp

@@ -123,6 +123,7 @@ void ArenaSimulation::placeStructures()
         weapon.cooldownTicks = 0.0f;
         weapon.currentTarget = std::nullopt;
         const double lv = static_cast<double>(entry.level);
+        const float tileSize = static_cast<float>(m_gameConfig.world.tileSize_m);
 
         const std::vector<std::string>& mask = isEnemy
             ? m_gameConfig.stations.enemyStation.surfaceMask
@@ -134,8 +135,8 @@ void ArenaSimulation::placeStructures()
                 m_gameConfig.stations.playerStation.hpFormula.evaluate(lv));
             weapon.damage     = static_cast<float>(
                 m_gameConfig.stations.playerStation.damageFormula.evaluate(lv));
-            weapon.range      = static_cast<float>(
+            weapon.range_tiles = static_cast<float>(
-                m_gameConfig.stations.playerStation.rangeFormula.evaluate(lv));
+                m_gameConfig.stations.playerStation.rangeFormula.evaluate(lv)) / tileSize;
             weapon.fireRateHz = static_cast<float>(
                 m_gameConfig.stations.playerStation.fireRateFormula.evaluate(lv));
         }
@@ -145,8 +146,8 @@ void ArenaSimulation::placeStructures()
                 m_gameConfig.stations.enemyStation.hpFormula.evaluate(lv));
             weapon.damage     = static_cast<float>(
                 m_gameConfig.stations.enemyStation.damageFormula.evaluate(lv));
-            weapon.range      = static_cast<float>(
+            weapon.range_tiles = static_cast<float>(
-                m_gameConfig.stations.enemyStation.rangeFormula.evaluate(lv));
+                m_gameConfig.stations.enemyStation.rangeFormula.evaluate(lv)) / tileSize;
             weapon.fireRateHz = static_cast<float>(
                 m_gameConfig.stations.enemyStation.fireRateFormula.evaluate(lv));
         }

src/balancing/ArenaWidget.cpp

@@ -30,11 +30,11 @@ void ArenaWidget::buildLayout(const std::string& arenaName)
 
     titleRow->addStretch();
 
-    m_inspectButton = new QPushButton("Inspect", this);
+    m_inspectButton = new QPushButton(tr("Inspect"), this);
     connect(m_inspectButton, &QPushButton::clicked, this, &ArenaWidget::inspectRequested);
     titleRow->addWidget(m_inspectButton);
 
-    m_startButton = new QPushButton("Start", this);
+    m_startButton = new QPushButton(tr("Start"), this);
     connect(m_startButton, &QPushButton::clicked, this, &ArenaWidget::startRequested);
     titleRow->addWidget(m_startButton);
 
@@ -94,7 +94,7 @@ void ArenaWidget::updateStatus(const ArenaStatus& status)
 
         if (status.finished && status.winnerTeam == ti)
         {
-            header->setText("[WON] " + QString::fromStdString(team.name));
+            header->setText(tr("[WON] %1").arg(QString::fromStdString(team.name)));
         }
         else
         {

src/balancing/BalancingWindow.cpp

@@ -22,15 +22,15 @@ BalancingWindow::BalancingWindow(const BalancingConfig& balancingConfig,
     , m_inspectedArenaIndex(-1)
 {
     m_visuals = VisualsLoader::load(m_configDir + "/visuals.toml");
-    setWindowTitle("DotaFactory — Balancing Tool");
+    setWindowTitle(tr("DotaFactory — Balancing Tool"));
     resize(800, 600);
 
     QVBoxLayout* mainLayout = new QVBoxLayout(this);
     mainLayout->setContentsMargins(0, 0, 0, 0);
 
     QHBoxLayout* buttonRow = new QHBoxLayout();
-    m_reloadButton = new QPushButton("Reload Config", this);
+    m_reloadButton = new QPushButton(tr("Reload Config"), this);
-    m_startAllButton = new QPushButton("Start All", this);
+    m_startAllButton = new QPushButton(tr("Start All"), this);
     buttonRow->addWidget(m_reloadButton);
     buttonRow->addWidget(m_startAllButton);
     buttonRow->addStretch();
@@ -146,7 +146,7 @@ void BalancingWindow::reloadConfig()
     }
     catch (const std::exception& e)
     {
-        QMessageBox::critical(this, "Reload Failed", QString::fromStdString(e.what()));
+        QMessageBox::critical(this, tr("Reload Failed"), QString::fromStdString(e.what()));
     }
 }
 

src/balancing/InspectWindow.cpp

@@ -18,7 +18,7 @@ InspectWindow::InspectWindow(ArenaSimulation* sim, const VisualsConfig* visuals,
     : QWidget(parent)
     , m_sim(sim)
 {
-    setWindowTitle(QString("Inspect \u2014 %1").arg(QString::fromStdString(arenaName)));
+    setWindowTitle(tr("Inspect \u2014 %1").arg(QString::fromStdString(arenaName)));
     resize(900, 700);
     setAttribute(Qt::WA_DeleteOnClose, false);
 
@@ -163,7 +163,7 @@ void InspectWindow::updateInfoPanel(const ArenaStatus& status)
 
         if (status.finished && status.winnerTeam == ti)
         {
-            header->setText("[WON] " + QString::fromStdString(team.name));
+            header->setText(tr("[WON] %1").arg(QString::fromStdString(team.name)));
         }
         else
         {

src/lib/CMakeLists.txt

@@ -1,11 +1,12 @@
 SET(HDRS)
 SET(SRCS)
 
-add_subdirectory(core)
 add_subdirectory(config)
+add_subdirectory(core)
+add_subdirectory(ecs)
+add_subdirectory(eventsystem)
 add_subdirectory(utility)
 add_subdirectory(sim)
-add_subdirectory(ecs)
 
 SET(HDRS
 	${HDRS}

src/lib/config/ConfigLoader.cpp

@@ -264,7 +264,8 @@ WorldConfig ConfigLoader::loadWorld(const std::string& path)
     cfg.refundPercentage           = static_cast<int>(requireInt(tbl["world"]["refund_percentage"], file, "world.refund_percentage"));
     cfg.startingBuildingBlocks     = static_cast<int>(requireInt(tbl["world"]["starting_building_blocks"], file, "world.starting_building_blocks"));
     cfg.scrapDespawnSeconds        = requireDouble(tbl["world"]["scrap_despawn_seconds"], file, "world.scrap_despawn_seconds");
-    cfg.beltSpeedTilesPerSecond    = requireDouble(tbl["world"]["belt_speed_tiles_per_second"], file, "world.belt_speed_tiles_per_second");
+    cfg.tileSize_m                 = requireDouble(tbl["world"]["tile_size_m"], file, "world.tile_size_m");
+    cfg.beltSpeed_tps              = requireDouble(tbl["world"]["belt_speed_mps"], file, "world.belt_speed_mps") / cfg.tileSize_m;
     cfg.tunnelMaxDistance          = static_cast<int>(requireInt(tbl["world"]["tunnel_max_distance"], file, "world.tunnel_max_distance"));
     cfg.departureIntervalSeconds   = requireDouble(tbl["world"]["departure_interval_seconds"], file, "world.departure_interval_seconds");
 

src/lib/config/WorldConfig.h

@@ -45,7 +45,8 @@ struct WorldConfig
     int refundPercentage;               // REQ-BLD-DEMOLISH
     int startingBuildingBlocks;         // REQ-HQ-STARTING-BLOCKS
     double scrapDespawnSeconds;         // REQ-RES-SCRAP-DROP
-    double beltSpeedTilesPerSecond;     // REQ-GW-BELT-SPEED
+    double tileSize_m;                  // metres per tile (REQ-GW-TILE-SIZE)
+    double beltSpeed_tps;               // REQ-GW-BELT-SPEED (tiles/s, converted from m/s in config)
     int tunnelMaxDistance;              // REQ-BLD-TUNNEL-PAIR
     double departureIntervalSeconds;    // REQ-SHP-RALLY
 

src/lib/core/EntityAdmin.cpp

@@ -39,9 +39,9 @@ void EntityAdmin::clear()
 }
 
 entt::entity EntityAdmin::spawnShip(QVector2D position, float hp, float maxHp,
-                                    float maxSpeedPerTick, float mainAccelPerTick,
+                                    float maxSpeed_tpt, float mainAcceleration_tptt,
-                                    float maneuveringAccelPerTick, float angularAccelPerTick,
+                                    float maneuveringAcceleration_tptt, float maxAngularAcceleration_rptt,
-                                    float maxRotationSpeedPerTick, float sensorRange,
+                                    float maxRotationSpeed_rpt, float sensorRange_tiles,
                                     int level, const std::string& schematicId, bool isEnemy)
 {
     entt::entity entity = createEntity();
@@ -50,17 +50,17 @@ entt::entity EntityAdmin::spawnShip(QVector2D position, float hp, float maxHp,
     add<FactionComponent>(entity, FactionComponent{isEnemy});
     add<FacingComponent>(entity, FacingComponent{0.0f});
     add<DynamicBodyComponent>(entity, DynamicBodyComponent{
-        maxSpeedPerTick,
+        maxSpeed_tpt,
-        mainAccelPerTick,
+        mainAcceleration_tptt,
-        maneuveringAccelPerTick,
+        maneuveringAcceleration_tptt,
-        angularAccelPerTick,
+        maxAngularAcceleration_rptt,
-        maxRotationSpeedPerTick,
+        maxRotationSpeed_rpt,
-        QVector2D(0.0f, 0.0f),  // velocity
+        QVector2D(0.0f, 0.0f),  // velocity_tpt
-        0.0f,                    // angularVelocity
+        0.0f,                    // angularVelocity_rpt
-        QVector2D(0.0f, 0.0f),  // linearAcceleration
+        QVector2D(0.0f, 0.0f),  // linearAcceleration_tptt
-        0.0f                     // angularAcceleration
+        0.0f                     // angularAcceleration_rptt
     });
-    add<SensorRangeComponent>(entity, SensorRangeComponent{sensorRange});
+    add<SensorRangeComponent>(entity, SensorRangeComponent{sensorRange_tiles});
     add<ShipIdentityComponent>(entity, ShipIdentityComponent{level, schematicId});
     add<MovementIntentComponent>(entity, MovementIntentComponent{0, QVector2D(0.0f, 0.0f)});
     return entity;

src/lib/core/EntityAdmin.h

@@ -53,9 +53,9 @@ public:
     // -- Factory methods ----------------------------------------------------
 
     entt::entity spawnShip(QVector2D position, float hp, float maxHp,
-                           float maxSpeedPerTick, float mainAccelPerTick,
+                           float maxSpeed_tpt, float mainAcceleration_tptt,
-                           float maneuveringAccelPerTick, float angularAccelPerTick,
+                           float maneuveringAcceleration_tptt, float maxAngularAcceleration_rptt,
-                           float maxRotationSpeedPerTick, float sensorRange,
+                           float maxRotationSpeed_rpt, float sensorRange_tiles,
                            int level, const std::string& schematicId, bool isEnemy);
 
     entt::entity spawnStation(QPoint anchor, QSize footprint,

src/lib/ecs/component/DynamicBodyComponent.h

@@ -4,18 +4,18 @@
 
 struct DynamicBodyComponent
 {
-    // --- dynamics parameters (formerly ShipDynamics) ---
+    // --- dynamics parameters ---
-    float maxSpeedPerTick;
+    float maxSpeed_tpt;               // tiles/tick
-    float mainAccelerationPerTick;
+    float mainAcceleration_tptt;      // tiles/tick²
-    float maneuveringAccelerationPerTick;
+    float maneuveringAcceleration_tptt; // tiles/tick²
-    float angularAccelerationPerTick;
+    float maxAngularAcceleration_rptt;  // rad/tick²
-    float maxRotationSpeedPerTick;
+    float maxRotationSpeed_rpt;       // rad/tick
 
     // --- integrated state ---
-    QVector2D velocity;
+    QVector2D velocity_tpt;           // tiles/tick
-    float     angularVelocity;
+    float     angularVelocity_rpt;    // rad/tick
 
     // --- written each tick by MovementIntentSystem, consumed by DynamicBodySystem ---
-    QVector2D linearAcceleration;
+    QVector2D linearAcceleration_tptt;  // tiles/tick²
-    float     angularAcceleration;
+    float     angularAcceleration_rptt; // rad/tick²
 };

src/lib/ecs/component/RepairBehaviorComponent.h

@@ -7,5 +7,5 @@
 struct RepairBehaviorComponent
 {
     std::optional<entt::entity> currentTarget;
-    float maxRepairRange = 0.0f;
+    float maxRepairRange_tiles = 0.0f;
 };

src/lib/ecs/component/RepairToolComponent.h

@@ -7,6 +7,6 @@
 struct RepairToolComponent
 {
     float ratePerTick;
-    float range;
+    float range_tiles;
     std::optional<entt::entity> currentTarget;
 };

src/lib/ecs/component/SalvageBehaviorComponent.h

@@ -10,5 +10,5 @@ struct SalvageBehaviorComponent
 {
     std::optional<QVector2D> scrapTarget;
     BuildingId deliveryBay;      // kInvalidBuildingId until assigned at a salvage bay
-    float maxCollectionRange = 0.0f;
+    float maxCollectionRange_tiles = 0.0f;
 };

src/lib/ecs/component/SalvageCargoComponent.h

@@ -4,7 +4,7 @@ struct SalvageCargoComponent
 {
     int   capacity;
     int   current;
-    float collectionRange;
+    float collectionRange_tiles;
     int   collectionIntervalTicks;
     int   cooldownTicksRemaining;
 };

src/lib/ecs/component/SensorRangeComponent.h

@@ -2,5 +2,5 @@
 
 struct SensorRangeComponent
 {
-    float value;
+    float value_tiles;
 };

src/lib/ecs/component/WeaponComponent.h

@@ -7,7 +7,7 @@
 struct WeaponComponent
 {
     float damage;
-    float range;
+    float range_tiles;
     float fireRateHz;
     float cooldownTicks;
     std::optional<entt::entity> currentTarget;

src/lib/ecs/system/AiSystem.cpp

@@ -28,6 +28,7 @@
 #include "ShipIdentityComponent.h"
 #include "StationBodyComponent.h"
 #include "ThreatResponseBehaviorComponent.h"
+#include "tracing.h"
 
 // ---------------------------------------------------------------------------
 // Shared helpers for repair targeting
@@ -72,6 +73,7 @@ static std::vector<RepairableInfo> buildRepairables(EntityAdmin& admin)
 
 void AiSystem::tickHomeReturnBehavior(EntityAdmin& admin)
 {
+	TRACE();
     admin.forEach<HomeReturnBehaviorComponent, HealthComponent, MovementIntentComponent>(
         [](entt::entity /*e*/, const HomeReturnBehaviorComponent& homeReturnBehavior,
            const HealthComponent& h, MovementIntentComponent& intent)
@@ -92,6 +94,7 @@ void AiSystem::tickHomeReturnBehavior(EntityAdmin& admin)
 
 void AiSystem::tickThreatResponseBehavior(EntityAdmin& admin, const BuildingSystem& buildings)
 {
+	TRACE();
     // Snapshot all combatant entities for target acquisition.
     struct CombatantInfo
     {
@@ -129,7 +132,7 @@ void AiSystem::tickThreatResponseBehavior(EntityAdmin& admin, const BuildingSyst
             PositionComponent& pos, FactionComponent& faction,
             SensorRangeComponent& sensor, MovementIntentComponent& intent)
         {
-            const float range = sensor.value;
+            const float range = sensor.value_tiles;
 
             // Validate current target.
             bool targetValid = false;
@@ -219,6 +222,7 @@ void AiSystem::tickThreatResponseBehavior(EntityAdmin& admin, const BuildingSyst
 
 void AiSystem::tickRepairBehavior(EntityAdmin& admin, BuildingSystem& buildings)
 {
+	TRACE();
     std::vector<RepairableInfo> repairables = buildRepairables(admin);
 
     // Snapshot enemy ships for threat detection.
@@ -247,7 +251,7 @@ void AiSystem::tickRepairBehavior(EntityAdmin& admin, BuildingSystem& buildings)
             bool enemyNearby = false;
             for (const EnemyInfo& enemy : enemies)
             {
-                if ((enemy.position - pos.value).length() <= sensor.value)
+                if ((enemy.position - pos.value).length() <= sensor.value_tiles)
                 {
                     enemyNearby = true;
                     break;
@@ -281,7 +285,7 @@ void AiSystem::tickRepairBehavior(EntityAdmin& admin, BuildingSystem& buildings)
             if (!targetValid)
             {
                 rb.currentTarget = std::nullopt;
-                float bestDist = sensor.value;
+                float bestDist = sensor.value_tiles;
 
                 for (const RepairableInfo& r : repairables)
                 {
@@ -327,6 +331,7 @@ void AiSystem::tickRepairBehavior(EntityAdmin& admin, BuildingSystem& buildings)
 
 void AiSystem::tickRepairTools(EntityAdmin& admin)
 {
+	TRACE();
     const std::vector<RepairableInfo> repairables = buildRepairables(admin);
 
     admin.forEach<RepairToolComponent, ModuleOwnerComponent>(
@@ -350,7 +355,7 @@ void AiSystem::tickRepairTools(EntityAdmin& admin)
                     const float dist =
                         (admin.get<PositionComponent>(preferred).value
                          - ownerPos.value).length();
-                    if (th.hp > 0.0f && th.hp < th.maxHp && dist <= rt.range)
+                    if (th.hp > 0.0f && th.hp < th.maxHp && dist <= rt.range_tiles)
                     {
                         rt.currentTarget = rb.currentTarget;
                         th.hp = std::min(th.hp + rt.ratePerTick, th.maxHp);
@@ -361,7 +366,7 @@ void AiSystem::tickRepairTools(EntityAdmin& admin)
 
             // Preferred target unavailable; scan for nearest damaged friendly in range.
             rt.currentTarget = std::nullopt;
-            float bestDist = rt.range;
+            float bestDist = rt.range_tiles;
             for (const RepairableInfo& r : repairables)
             {
                 if (r.isEnemy) { continue; }
@@ -389,6 +394,7 @@ void AiSystem::tickRepairTools(EntityAdmin& admin)
 void AiSystem::tickSalvageBehavior(EntityAdmin& admin, ScrapSystem& scraps,
                                     BuildingSystem& buildings)
 {
+	TRACE();
     // Snapshot enemy ships for threat detection.
     struct EnemyShipPos
     {
@@ -435,7 +441,7 @@ void AiSystem::tickSalvageBehavior(EntityAdmin& admin, ScrapSystem& scraps,
             PositionComponent& pos,
             SensorRangeComponent& sensor, MovementIntentComponent& intent)
         {
-            const float collectRange = salvageBehavior.maxCollectionRange;
+            const float collectRange = salvageBehavior.maxCollectionRange_tiles;
             const AggregatedCargo& cargoState = cargoByShip[e];
 
             // Assign nearest SalvageBay if needed.
@@ -524,7 +530,7 @@ void AiSystem::tickSalvageBehavior(EntityAdmin& admin, ScrapSystem& scraps,
                     }
                     for (const ScrapInfo& si : allScrap)
                     {
-                        if ((si.position - pos.value).length() > c.collectionRange) { continue; }
+                        if ((si.position - pos.value).length() > c.collectionRange_tiles) { continue; }
                         if (scraps.consume(si.entity))
                         {
                             ++c.current;
@@ -549,7 +555,7 @@ void AiSystem::tickSalvageBehavior(EntityAdmin& admin, ScrapSystem& scraps,
             }
             else
             {
-                float bestDist = sensor.value;
+                float bestDist = sensor.value_tiles;
                 std::optional<QVector2D> bestPos;
                 for (const ScrapInfo& si : allScrap)
                 {

src/lib/ecs/system/CombatSystem.cpp

@@ -8,6 +8,7 @@
 #include "SensorRangeComponent.h"
 #include "ShipIdentityComponent.h"
 #include "ThreatResponseBehaviorComponent.h"
+#include "tracing.h"
 #include "WeaponComponent.h"
 
 static constexpr Tick kWeaponImpactDelayTicks = 5;
@@ -22,6 +23,7 @@ void CombatSystem::tick(Tick currentTick,
                          BuildingSystem& /*buildings*/,
                          std::vector<FireEvent>& outFireEvents)
 {
+	TRACE();
     // All weapons (ships and stations) are child entities linked via ModuleOwnerComponent.
     admin.forEach<WeaponComponent, ModuleOwnerComponent>(
         [&](entt::entity /*e*/, WeaponComponent& weapon, const ModuleOwnerComponent& owner)
@@ -67,7 +69,7 @@ void CombatSystem::resolveWeapon(
         {
             const float distanceSquared =
                 (ownPos.value - admin.get<PositionComponent>(t).value).lengthSquared();
-            if (distanceSquared > weapon.range * weapon.range)
+            if (distanceSquared > weapon.range_tiles * weapon.range_tiles)
             {
                 weapon.currentTarget = std::nullopt;
             }
@@ -79,8 +81,8 @@ void CombatSystem::resolveWeapon(
     if (!weapon.currentTarget)
     {
         const float acquisitionRange = admin.hasAll<SensorRangeComponent>(shipEntity)
-            ? admin.get<SensorRangeComponent>(shipEntity).value
+            ? admin.get<SensorRangeComponent>(shipEntity).value_tiles
-            : weapon.range;
+            : weapon.range_tiles;
         float bestDistanceSquared = acquisitionRange * acquisitionRange;
         admin.forEach<ShipIdentityComponent, PositionComponent, FactionComponent>(
             [&](entt::entity candidate, const ShipIdentityComponent& /*si*/,
@@ -124,6 +126,7 @@ void CombatSystem::resolveWeapon(
 
 void CombatSystem::applyPendingDamage(Tick currentTick, EntityAdmin& admin)
 {
+	TRACE();
     std::vector<PendingDamage>::iterator it = m_pendingDamage.begin();
     while (it != m_pendingDamage.end())
     {

src/lib/ecs/system/DynamicBodySystem.cpp

@@ -9,6 +9,7 @@
 #include "EntityAdmin.h"
 #include "FacingComponent.h"
 #include "PositionComponent.h"
+#include "tracing.h"
 
 static float wrapAngle(float a)
 {
@@ -21,31 +22,33 @@ static float wrapAngle(float a)
 
 void DynamicBodySystem::tick(EntityAdmin& admin)
 {
+	TRACE();
     admin.forEach<PositionComponent, FacingComponent, DynamicBodyComponent>(
         [](entt::entity /*e*/, PositionComponent& pos, FacingComponent& facing,
            DynamicBodyComponent& body)
         {
             // Integrate angular velocity, clamp to max rotation speed, then advance facing.
-            body.angularVelocity += body.angularAcceleration;
+            body.angularVelocity_rpt += body.angularAcceleration_rptt;
-            body.angularVelocity  = std::max(-body.maxRotationSpeedPerTick,
+            body.angularVelocity_rpt  = std::max(-body.maxRotationSpeed_rpt,
-                                             std::min(body.angularVelocity,
+                                                  std::min(body.angularVelocity_rpt,
-                                                      body.maxRotationSpeedPerTick));
+                                                           body.maxRotationSpeed_rpt));
-            facing.radians = wrapAngle(facing.radians + body.angularVelocity);
+            facing.radians = wrapAngle(facing.radians + body.angularVelocity_rpt);
 
             // Integrate linear velocity and cap to max speed.
-            body.velocity += body.linearAcceleration;
+            body.velocity_tpt += body.linearAcceleration_tptt;
-            const float speed = body.velocity.length();
+            const float speed = body.velocity_tpt.length();
-            if (speed > body.maxSpeedPerTick)
+            if (speed > body.maxSpeed_tpt)
             {
-                body.velocity = body.velocity.normalized() * body.maxSpeedPerTick;
+                body.velocity_tpt = body.velocity_tpt.normalized() * body.maxSpeed_tpt;
             }
 
             // Advance position.
-            pos.value += body.velocity;
+            pos.value += body.velocity_tpt;
 
             // Reset per-tick fields so stale values don't linger if the intent
             // system is skipped for this entity in a future tick.
-            body.linearAcceleration  = QVector2D(0.0f, 0.0f);
+            body.linearAcceleration_tptt  = QVector2D(0.0f, 0.0f);
-            body.angularAcceleration = 0.0f;
+            body.angularAcceleration_rptt = 0.0f;
         });
 }
+

src/lib/ecs/system/MovementIntentSystem.cpp

@@ -10,6 +10,7 @@
 #include "FacingComponent.h"
 #include "MovementIntentComponent.h"
 #include "PositionComponent.h"
+#include "tracing.h"
 
 static float wrapAngle(float a)
 {
@@ -22,6 +23,7 @@ static float wrapAngle(float a)
 
 void MovementIntentSystem::tick(EntityAdmin& admin)
 {
+	TRACE();
     admin.forEach<PositionComponent, FacingComponent, DynamicBodyComponent,
                   MovementIntentComponent>(
         [](entt::entity /*e*/, const PositionComponent& pos, const FacingComponent& facing,
@@ -30,16 +32,16 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
             if (intent.priority == 0)
             {
                 // No movement intent: brake using available thrust.
-                const float linearBraking = std::min(body.velocity.length(),
+                const float linearBraking = std::min(body.velocity_tpt.length(),
-                                                     body.maneuveringAccelerationPerTick);
+                                                     body.maneuveringAcceleration_tptt);
-                body.linearAcceleration = (body.velocity.length() > 0.0001f)
+                body.linearAcceleration_tptt = (body.velocity_tpt.length() > 0.0001f)
-                    ? -body.velocity.normalized() * linearBraking
+                    ? -body.velocity_tpt.normalized() * linearBraking
                     : QVector2D(0.0f, 0.0f);
 
-                const float angBraking = std::min(std::abs(body.angularVelocity),
+                const float angBraking = std::min(std::abs(body.angularVelocity_rpt),
-                                                  body.angularAccelerationPerTick);
+                                                  body.maxAngularAcceleration_rptt);
-                body.angularAcceleration =
+                body.angularAcceleration_rptt =
-                    (body.angularVelocity >= 0.0f) ? -angBraking : angBraking;
+                    (body.angularVelocity_rpt >= 0.0f) ? -angBraking : angBraking;
                 return;
             }
 
@@ -50,8 +52,8 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
             {
                 // Already at target: no new thrust. The ship drifts; it will
                 // re-approach next tick once it has moved away.
-                body.linearAcceleration  = QVector2D(0.0f, 0.0f);
+                body.linearAcceleration_tptt  = QVector2D(0.0f, 0.0f);
-                body.angularAcceleration = 0.0f;
+                body.angularAcceleration_rptt = 0.0f;
                 return;
             }
 
@@ -60,11 +62,11 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
             const float desiredAngle = std::atan2(delta.y(), delta.x());
             const float angleDiff    = wrapAngle(desiredAngle - facing.radians);
 
-            const float rotDelta = std::max(-body.angularAccelerationPerTick,
+            const float rotDelta = std::max(-body.maxAngularAcceleration_rptt,
                                             std::min(angleDiff,
-                                                     body.angularAccelerationPerTick));
+                                                     body.maxAngularAcceleration_rptt));
 
-            float newAngVel = body.angularVelocity + rotDelta;
+            float newAngVel = body.angularVelocity_rpt + rotDelta;
 
             // Overshoot prevention: if the accumulated angular velocity already
             // exceeds the remaining angle, snap it to exactly that angle so the
@@ -75,8 +77,8 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
                 newAngVel = angleDiff;
             }
 
-            body.angularAcceleration = newAngVel - body.angularVelocity;
+            body.angularAcceleration_rptt = newAngVel - body.angularVelocity_rpt;
-            // DynamicBodySystem applies the clamp to maxRotationSpeedPerTick after
+            // DynamicBodySystem applies the clamp to maxRotationSpeed_rpt after
             // integrating, so we do not clamp here.
 
             // --- Linear acceleration ---
@@ -88,22 +90,22 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
             const QVector2D facingVec(std::cos(projectedRadians),
                                       std::sin(projectedRadians));
 
-            const float manAccel     = body.maneuveringAccelerationPerTick;
+            const float manAccel     = body.maneuveringAcceleration_tptt;
-            const float stoppingDist = (body.maxSpeedPerTick * body.maxSpeedPerTick)
+            const float stoppingDist = (body.maxSpeed_tpt * body.maxSpeed_tpt)
                                        / (2.0f * manAccel);
             // Cap to dist so the ship never overshoots the target in a single tick.
             const float baseDesiredSpeed = (dist <= stoppingDist)
                 ? std::sqrt(2.0f * manAccel * dist)
-                : body.maxSpeedPerTick;
+                : body.maxSpeed_tpt;
             const float desiredSpeed = std::min(dist, baseDesiredSpeed);
 
             const QVector2D desiredVel = delta.normalized() * desiredSpeed;
-            const QVector2D velError   = desiredVel - body.velocity;
+            const QVector2D velError   = desiredVel - body.velocity_tpt;
 
             const float mainAligned  = std::max(0.0f,
                 QVector2D::dotProduct(velError, facingVec));
             const float mainApplied  = std::min(mainAligned,
-                                                body.mainAccelerationPerTick);
+                                                body.mainAcceleration_tptt);
             const QVector2D mainDelta = facingVec * mainApplied;
 
             const QVector2D remaining = velError - mainDelta;
@@ -112,6 +114,7 @@ void MovementIntentSystem::tick(EntityAdmin& admin)
                 ? remaining.normalized() * manAccel
                 : remaining;
 
-            body.linearAcceleration = mainDelta + maneuverDelta;
+            body.linearAcceleration_tptt = mainDelta + maneuverDelta;
         });
 }
+

src/lib/ecs/system/ScrapSystem.cpp

@@ -4,6 +4,7 @@
 #include "EntityAdmin.h"
 #include "PositionComponent.h"
 #include "ScrapDataComponent.h"
+#include "tracing.h"
 
 ScrapSystem::ScrapSystem(EntityAdmin& admin)
     : m_admin(admin)
@@ -17,6 +18,7 @@ entt::entity ScrapSystem::spawn(QVector2D position, int amount, Tick despawnAt)
 
 void ScrapSystem::tickDespawn(Tick currentTick)
 {
+	TRACE();
     std::vector<entt::entity> expired;
     m_admin.forEach<DespawnAtComponent>(
         [&expired, currentTick](entt::entity e, DespawnAtComponent& d)
@@ -54,3 +56,4 @@ std::vector<ScrapInfo> ScrapSystem::allScrapInfo() const
         });
     return result;
 }
+

src/lib/ecs/system/ShipSystem.cpp

@@ -20,6 +20,7 @@
 #include "SensorRangeComponent.h"
 #include "Tick.h"
 #include "ThreatResponseBehaviorComponent.h"
+#include "tracing.h"
 #include "WeaponComponent.h"
 
 ShipSystem::ShipSystem(const GameConfig& config, EntityAdmin& admin)
@@ -61,30 +62,32 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
 
     const double x = static_cast<double>(level);
     const float tickRate = static_cast<float>(kTickRateHz);
+    const float tileSize = static_cast<float>(m_config.world.tileSize_m);
 
     float hp    = static_cast<float>(def->health.hpFormula.evaluate(x));
     float maxHp = hp;
-    float maxSpeedPerTick         = static_cast<float>(def->movement.speedFormula.evaluate(x))
+    float maxSpeed_tpt              = static_cast<float>(def->movement.speedFormula.evaluate(x))
-                                    / tickRate;
+                                      / tileSize / tickRate;
-    float mainAccelPerTick        = static_cast<float>(
+    float mainAcceleration_tptt     = static_cast<float>(
-                                        def->movement.mainAccelerationFormula.evaluate(x))
+                                          def->movement.mainAccelerationFormula.evaluate(x))
-                                    / tickRate;
+                                      / tileSize / tickRate;
-    float maneuveringAccelPerTick = static_cast<float>(
+    float maneuveringAcceleration_tptt = static_cast<float>(
-                                        def->movement.maneuveringAccelerationFormula.evaluate(x))
+                                          def->movement.maneuveringAccelerationFormula.evaluate(x))
-                                    / tickRate;
+                                          / tileSize / tickRate;
-    float angularAccelPerTick     = static_cast<float>(
+    float maxAngularAcceleration_rptt  = static_cast<float>(
-                                        def->movement.angularAccelerationFormula.evaluate(x))
+                                          def->movement.angularAccelerationFormula.evaluate(x))
-                                    / tickRate;
+                                          / tickRate;
-    float maxRotationSpeedPerTick = static_cast<float>(
+    float maxRotationSpeed_rpt      = static_cast<float>(
-                                        def->movement.maxRotationSpeedFormula.evaluate(x))
+                                          def->movement.maxRotationSpeedFormula.evaluate(x))
-                                    / tickRate;
+                                          / tickRate;
-    float sensorRange             = static_cast<float>(
+    float sensorRange_tiles         = static_cast<float>(
-                                        def->sensor.sensorRangeFormula.evaluate(x));
+                                          def->sensor.sensorRangeFormula.evaluate(x))
+                                          / tileSize;
 
     entt::entity entity = m_admin.spawnShip(
         position, hp, maxHp,
-        maxSpeedPerTick, mainAccelPerTick, maneuveringAccelPerTick,
+        maxSpeed_tpt, mainAcceleration_tptt, maneuveringAcceleration_tptt,
-        angularAccelPerTick, maxRotationSpeedPerTick, sensorRange,
+        maxAngularAcceleration_rptt, maxRotationSpeed_rpt, sensorRange_tiles,
         level, schematicId, isEnemy);
 
     // Determine module list: configured layout takes precedence over default.
@@ -108,8 +111,8 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
             WeaponComponent w;
             w.damage        = static_cast<float>(
                 modDef->weaponCapability->damageFormula.evaluate(mx));
-            w.range         = static_cast<float>(
+            w.range_tiles   = static_cast<float>(
-                modDef->weaponCapability->attackRangeFormula.evaluate(mx));
+                modDef->weaponCapability->attackRangeFormula.evaluate(mx)) / tileSize;
             w.fireRateHz    = static_cast<float>(
                 modDef->weaponCapability->attackRateFormula.evaluate(mx));
             w.cooldownTicks = 0.0f;
@@ -127,8 +130,8 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
             cargo.capacity = static_cast<int>(
                 modDef->salvageCapability->cargoCapacityFormula.evaluate(mx));
             cargo.current  = 0;
-            cargo.collectionRange = static_cast<float>(
+            cargo.collectionRange_tiles = static_cast<float>(
-                modDef->salvageCapability->collectionRangeFormula.evaluate(mx));
+                modDef->salvageCapability->collectionRangeFormula.evaluate(mx)) / tileSize;
             const double rate = modDef->salvageCapability->collectionRateFormula.evaluate(mx);
             cargo.collectionIntervalTicks = (rate > 0.0)
                 ? static_cast<int>(kTickRateHz / rate + 0.5)
@@ -147,8 +150,8 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
             rt.ratePerTick   = static_cast<float>(
                 modDef->repairCapability->repairRateFormula.evaluate(mx))
                 / static_cast<float>(kTickRateHz);
-            rt.range         = static_cast<float>(
+            rt.range_tiles   = static_cast<float>(
-                modDef->repairCapability->repairRangeFormula.evaluate(mx));
+                modDef->repairCapability->repairRangeFormula.evaluate(mx)) / tileSize;
             rt.currentTarget = std::nullopt;
 
             entt::entity child = m_admin.createModuleEntity();
@@ -206,6 +209,26 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
         }
     }
 
+    // Range stat additive modifiers are expressed in metres in config; convert to tiles.
+    const double tileSizeD = static_cast<double>(m_config.world.tileSize_m);
+    const char* const kRangeStats[] = {
+        "sensor_range", "attack_range", "collection_range", "repair_range"
+    };
+    std::map<std::string, std::pair<double, double>>* allModMaps[] = {
+        &hullMods, &weaponMods, &salvageMods, &repairMods
+    };
+    for (const char* stat : kRangeStats)
+    {
+        for (std::map<std::string, std::pair<double, double>>* mods : allModMaps)
+        {
+            std::map<std::string, std::pair<double, double>>::iterator it = mods->find(stat);
+            if (it != mods->end())
+            {
+                it->second.second /= tileSizeD;
+            }
+        }
+    }
+
     // Helper: apply a modifier map to a float stat.
     auto applyMod = [](float& stat, const std::string& name,
                        const std::map<std::string, std::pair<double, double>>& mods)
@@ -225,30 +248,30 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
         DynamicBodyComponent& dynamics = m_admin.get<DynamicBodyComponent>(entity);
         SensorRangeComponent& sensor   = m_admin.get<SensorRangeComponent>(entity);
 
-        applyMod(health.maxHp,                              "hp",                    hullMods);
+        applyMod(health.maxHp,                                 "hp",                       hullMods);
         health.hp = health.maxHp;
-        applyMod(dynamics.maxSpeedPerTick,                  "speed",                 hullMods);
+        applyMod(dynamics.maxSpeed_tpt,                        "speed",                    hullMods);
-        applyMod(dynamics.mainAccelerationPerTick,          "main_acceleration",     hullMods);
+        applyMod(dynamics.mainAcceleration_tptt,               "main_acceleration",        hullMods);
-        applyMod(dynamics.maneuveringAccelerationPerTick,   "maneuvering_acceleration", hullMods);
+        applyMod(dynamics.maneuveringAcceleration_tptt,        "maneuvering_acceleration", hullMods);
-        applyMod(dynamics.angularAccelerationPerTick,       "angular_acceleration",  hullMods);
+        applyMod(dynamics.maxAngularAcceleration_rptt,         "angular_acceleration",     hullMods);
-        applyMod(dynamics.maxRotationSpeedPerTick,          "max_rotation_speed",    hullMods);
+        applyMod(dynamics.maxRotationSpeed_rpt,                "max_rotation_speed",       hullMods);
-        applyMod(sensor.value,                              "sensor_range",          hullMods);
+        applyMod(sensor.value_tiles,                           "sensor_range",             hullMods);
     }
 
     // Apply weapon modifiers to each weapon child.
     for (entt::entity child : weaponChildren)
     {
         WeaponComponent& w = m_admin.get<WeaponComponent>(child);
-        applyMod(w.damage,     "damage",       weaponMods);
+        applyMod(w.damage,       "damage",       weaponMods);
-        applyMod(w.range,      "attack_range", weaponMods);
+        applyMod(w.range_tiles,  "attack_range", weaponMods);
-        applyMod(w.fireRateHz, "attack_rate",  weaponMods);
+        applyMod(w.fireRateHz,   "attack_rate",  weaponMods);
     }
 
     // Apply salvage modifiers to each salvage child.
     for (entt::entity child : salvageChildren)
     {
         SalvageCargoComponent& c = m_admin.get<SalvageCargoComponent>(child);
-        float fRange    = c.collectionRange;
+        float fRange    = c.collectionRange_tiles;
         float fCapacity = static_cast<float>(c.capacity);
         // Apply rate modifier: compute rate from interval, apply multiplier, convert back.
         float fRate = (c.collectionIntervalTicks > 0)
@@ -257,7 +280,7 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
         applyMod(fRange,    "collection_range", salvageMods);
         applyMod(fCapacity, "cargo_capacity",   salvageMods);
         applyMod(fRate,     "collection_rate",  salvageMods);
-        c.collectionRange         = fRange;
+        c.collectionRange_tiles   = fRange;
         c.capacity                = static_cast<int>(fCapacity + 0.5f);
         c.collectionIntervalTicks = (fRate > 0.0f)
             ? static_cast<int>(static_cast<float>(kTickRateHz) / fRate + 0.5f)
@@ -268,8 +291,8 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
     for (entt::entity child : repairChildren)
     {
         RepairToolComponent& rt = m_admin.get<RepairToolComponent>(child);
-        applyMod(rt.ratePerTick, "repair_rate",  repairMods);
+        applyMod(rt.ratePerTick,  "repair_rate",  repairMods);
-        applyMod(rt.range,       "repair_range", repairMods);
+        applyMod(rt.range_tiles,  "repair_range", repairMods);
     }
 
     // --- Pass 3: attach behavior components based on capability presence -----
@@ -291,14 +314,14 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
         float maxCollRange = 0.0f;
         for (entt::entity child : salvageChildren)
         {
-            const float r = m_admin.get<SalvageCargoComponent>(child).collectionRange;
+            const float r = m_admin.get<SalvageCargoComponent>(child).collectionRange_tiles;
             if (r > maxCollRange) { maxCollRange = r; }
         }
 
         SalvageBehaviorComponent sb;
-        sb.scrapTarget        = std::nullopt;
+        sb.scrapTarget               = std::nullopt;
-        sb.deliveryBay        = kInvalidBuildingId;
+        sb.deliveryBay               = kInvalidBuildingId;
-        sb.maxCollectionRange = maxCollRange;
+        sb.maxCollectionRange_tiles  = maxCollRange;
         m_admin.addComponent<SalvageBehaviorComponent>(entity, sb);
     }
 
@@ -307,13 +330,13 @@ entt::entity ShipSystem::spawn(const std::string& schematicId, int level,
         float maxRepairRange = 0.0f;
         for (entt::entity child : repairChildren)
         {
-            const float r = m_admin.get<RepairToolComponent>(child).range;
+            const float r = m_admin.get<RepairToolComponent>(child).range_tiles;
             if (r > maxRepairRange) { maxRepairRange = r; }
         }
 
         RepairBehaviorComponent rb;
-        rb.currentTarget  = std::nullopt;
+        rb.currentTarget         = std::nullopt;
-        rb.maxRepairRange = maxRepairRange;
+        rb.maxRepairRange_tiles  = maxRepairRange;
         m_admin.addComponent<RepairBehaviorComponent>(entity, rb);
     }
 
@@ -334,6 +357,7 @@ void ShipSystem::despawn(entt::entity entity)
 
 void ShipSystem::clearMovementIntents()
 {
+	TRACE();
     m_admin.forEach<MovementIntentComponent>(
         [](entt::entity /*e*/, MovementIntentComponent& i)
         {
@@ -348,6 +372,7 @@ void ShipSystem::setRallyPoint(QVector2D point)
 
 void ShipSystem::triggerRallyDeparture()
 {
+	TRACE();
     std::vector<entt::entity> toRemove;
     m_admin.forEach<RallyBehaviorComponent, FactionComponent>(
         [&toRemove](entt::entity e, const RallyBehaviorComponent& /*rb*/,

src/lib/eventsystem/CMakeLists.txt

@@ -0,0 +1,23 @@
+add_subdirectory(event)
+
+SET(HDRS
+	${HDRS}
+	${CMAKE_CURRENT_SOURCE_DIR}/Event.h
+	${CMAKE_CURRENT_SOURCE_DIR}/EventHandler.h
+	${CMAKE_CURRENT_SOURCE_DIR}/EventHandlerBase.h
+	${CMAKE_CURRENT_SOURCE_DIR}/EventManager.h
+	PARENT_SCOPE
+)
+
+SET(SRCS
+	${SRCS}
+	${CMAKE_CURRENT_SOURCE_DIR}/EventHandlerBase.cpp
+	${CMAKE_CURRENT_SOURCE_DIR}/EventManager.cpp
+	PARENT_SCOPE
+)
+
+SET(LIB_INCLUDE_PATH
+	${LIB_INCLUDE_PATH}
+	${CMAKE_CURRENT_SOURCE_DIR}
+	PARENT_SCOPE
+)

src/lib/eventsystem/Event.h

@@ -0,0 +1,10 @@
+#ifndef EVENT_H
+#define EVENT_H
+
+class Event
+{
+public:
+	virtual ~Event() = default;
+};
+
+#endif   // EVENT_H

src/lib/eventsystem/EventHandler.h

@@ -0,0 +1,80 @@
+#ifndef EVENT_HANDLER_H
+#define EVENT_HANDLER_H
+
+#include <memory>
+
+#include "EventHandlerBase.h"
+#include "EventManager.h"
+
+template <typename T>
+class EventHandler: public EventHandlerBase
+{
+public:
+	void registerForEvent()
+	{
+		EventManager::getInstance()->registerEventHandler(this);
+	}
+
+	void unregisterForEvent()
+	{
+		EventManager::getInstance()->unregisterEventHandler(this);
+	}
+
+	void handleBaseEvent(std::shared_ptr<const Event> event) override
+	{
+		std::shared_ptr<const T> specificEvent = std::dynamic_pointer_cast<const T>(event);
+		if (specificEvent)
+		{
+			handleEvent(specificEvent);
+		}
+	}
+
+private:
+	virtual void handleEvent(std::shared_ptr<const T> event) = 0;
+};
+
+
+template <typename... Ts> class CombinedEventHandlerHelper 
+{
+protected:
+	void registerForEventsHelper() {}
+	void unregisterForEventsHelper() {}
+};
+
+
+template <typename T, typename... Ts>
+class CombinedEventHandlerHelper<T, Ts...>
+    : public EventHandler<T>
+    , public CombinedEventHandlerHelper<Ts...>
+{
+protected:
+	void registerForEventsHelper()
+	{
+		EventHandler<T>::registerForEvent();
+		CombinedEventHandlerHelper<Ts...>::registerForEventsHelper();
+	}
+
+	void unregisterForEventsHelper()
+	{
+		EventHandler<T>::unregisterForEvent();
+		CombinedEventHandlerHelper<Ts...>::unregisterForEventsHelper();
+	}
+};
+
+
+template <typename... Ts>
+class CombinedEventHandler: public CombinedEventHandlerHelper<Ts...>
+{
+protected:
+	void registerForEvents()
+	{
+		CombinedEventHandlerHelper<Ts...>::registerForEventsHelper();
+	}
+
+	void unregisterForEvents()
+	{
+		CombinedEventHandlerHelper<Ts...>::unregisterForEventsHelper();
+	}
+};
+
+#endif   // EVENT_HANDLER_H

src/lib/eventsystem/EventHandlerBase.cpp

@@ -0,0 +1,7 @@
+#include "EventHandlerBase.h"
+
+unsigned int EventHandlerBase::s_nextId = 0;
+
+EventHandlerBase::EventHandlerBase(): m_id(s_nextId++)
+{
+}

src/lib/eventsystem/EventHandlerBase.h

@@ -0,0 +1,25 @@
+#ifndef EVENT_HANDLER_BASE_H
+#define EVENT_HANDLER_BASE_H
+
+#include <memory>
+
+class Event;
+class EventManager;
+
+class EventHandlerBase
+{
+private:
+	static unsigned int s_nextId;
+
+public:
+	EventHandlerBase();
+	virtual ~EventHandlerBase() = default;
+	virtual void handleBaseEvent(std::shared_ptr<const Event> event) = 0;
+
+private:
+	const unsigned int m_id;
+
+	friend EventManager;
+};
+
+#endif   // EVENT_HANDLER_BASE_H

src/lib/eventsystem/EventManager.cpp

@@ -0,0 +1,129 @@
+#include "EventManager.h"
+
+#include <set>
+
+#include "EventHandlerBase.h"
+
+std::shared_ptr<EventManager> EventManager::getInstance()
+{
+	if (!s_instance)
+	{
+		s_instance = std::shared_ptr<EventManager>(new EventManager());
+	}
+	return s_instance;
+}
+
+void EventManager::destroyInstance()
+{
+	if (s_instance)
+	{
+		s_instance.reset();
+	}
+}
+
+std::shared_ptr<EventManager> EventManager::s_instance = std::shared_ptr<EventManager>();
+
+void EventManager::registerEventHandler(EventHandlerBase *eventHandler)
+{
+	std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+	m_eventHandlers[eventHandler->m_id] = eventHandler;
+}
+
+void EventManager::unregisterEventHandler(EventHandlerBase *eventHandler)
+{
+	std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+	m_eventHandlers.erase(eventHandler->m_id);
+}
+
+void EventManager::sendEventImmediately(std::shared_ptr<Event> event)
+{
+	if (event)
+	{
+		std::set<unsigned int> eventHandlerIds;
+		{
+			std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+			for (auto it : m_eventHandlers)
+			{
+				eventHandlerIds.insert(it.first);
+			}
+		}
+
+		for (unsigned int id : eventHandlerIds)
+		{
+			// this is necessary to allow HandleBaseEvent() to remove event handlers without causing a crash
+			EventHandlerBase *eventHandler = nullptr;
+			{
+				std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+				auto it = m_eventHandlers.find(id);
+				if (it != m_eventHandlers.end())
+				{
+					eventHandler = it->second;
+				}
+			}
+			if (eventHandler)
+			{
+				eventHandler->handleBaseEvent(event);
+			}
+		}
+	}
+}
+
+void EventManager::addEvent(std::shared_ptr<Event> event)
+{
+	if (event)
+	{
+		std::scoped_lock<std::mutex> lock(m_eventsMutex);
+		m_events.push_back(event);
+	}
+}
+
+void EventManager::processEvents()
+{
+	std::vector<std::shared_ptr<Event>> events;
+	{
+		std::scoped_lock<std::mutex> lock(m_eventsMutex);
+		events = m_events;
+		m_events.clear();
+	}
+
+	std::set<unsigned int> eventHandlerIds;
+	{
+		std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+		for (auto it : m_eventHandlers)
+		{
+			eventHandlerIds.insert(it.first);
+		}
+	}
+
+	for (std::shared_ptr<Event> event : events)
+	{
+		for (unsigned int id : eventHandlerIds)
+		{
+			// this is necessary to allow HandleBaseEvent() to remove event handlers without causing a crash
+			EventHandlerBase *eventHandler = nullptr;
+			{
+				std::scoped_lock<std::mutex> lock(m_eventHandlersMutex);
+				auto it = m_eventHandlers.find(id);
+				if (it != m_eventHandlers.end())
+				{
+					eventHandler = it->second;
+				}
+			}
+			if (eventHandler)
+			{
+				eventHandler->handleBaseEvent(event);
+			}
+		}
+	}
+}
+
+void EventManager::clearEvents()
+{
+	std::scoped_lock<std::mutex> lock(m_eventsMutex);
+	m_events.clear();
+}
+
+bool EventManager::hasEvents() const
+{
+	return !m_events.empty();
+}

src/lib/eventsystem/EventManager.h

@@ -0,0 +1,44 @@
+#ifndef EVENT_MANAGER_H
+#define EVENT_MANAGER_H
+
+#include <map>
+#include <memory>
+#include <mutex>
+#include <vector>
+
+#include "Event.h"
+
+class EventHandlerBase;
+
+class EventManager
+{
+public:
+	static std::shared_ptr<EventManager> getInstance();
+	static void destroyInstance();
+
+private:
+	static std::shared_ptr<EventManager> s_instance;
+
+public:
+	EventManager(EventManager const &) = delete;
+	void operator=(EventManager const &) = delete;
+
+	void registerEventHandler(EventHandlerBase *eventHandler);
+	void unregisterEventHandler(EventHandlerBase *eventHandler);
+	void sendEventImmediately(std::shared_ptr<Event> event);
+	void addEvent(std::shared_ptr<Event> event);
+	void processEvents();
+	void clearEvents();
+
+	bool hasEvents() const;
+
+private:
+	EventManager() = default;
+
+	std::map<unsigned int, EventHandlerBase *> m_eventHandlers;
+	std::vector<std::shared_ptr<Event>> m_events;
+	std::mutex m_eventHandlersMutex;
+	std::mutex m_eventsMutex;
+};
+
+#endif   // EVENT_MANAGER_H

src/lib/eventsystem/event/BossWaveUpdatedEvent.h

@@ -0,0 +1,17 @@
+#ifndef BOSS_WAVE_UPDATED_EVENT_H
+#define BOSS_WAVE_UPDATED_EVENT_H
+
+#include "Event.h"
+#include "Tick.h"
+
+class BossWaveUpdatedEvent : public Event
+{
+public:
+	BossWaveUpdatedEvent(int counter, Tick countdownTicks)
+	    : counter(counter), countdownTicks(countdownTicks) {}
+	const int  counter;
+	const Tick countdownTicks;
+};
+
+#endif   // BOSS_WAVE_UPDATED_EVENT_H
+

src/lib/eventsystem/event/BuildingBlocksChangedEvent.h

@@ -0,0 +1,14 @@
+#ifndef BUILDING_BLOCKS_CHANGED_EVENT_H
+#define BUILDING_BLOCKS_CHANGED_EVENT_H
+
+#include "Event.h"
+
+class BuildingBlocksChangedEvent : public Event
+{
+public:
+	explicit BuildingBlocksChangedEvent(int blocks) : blocks(blocks) {}
+	const int blocks;
+};
+
+#endif   // BUILDING_BLOCKS_CHANGED_EVENT_H
+

src/lib/eventsystem/event/CMakeLists.txt

@@ -0,0 +1,21 @@
+SET(HDRS
+	${HDRS}
+	${CMAKE_CURRENT_SOURCE_DIR}/TracePrintRequestedEvent.h
+	${CMAKE_CURRENT_SOURCE_DIR}/TickAdvancedEvent.h
+	${CMAKE_CURRENT_SOURCE_DIR}/BuildingBlocksChangedEvent.h
+	${CMAKE_CURRENT_SOURCE_DIR}/GameSpeedChangedEvent.h
+	${CMAKE_CURRENT_SOURCE_DIR}/BossWaveUpdatedEvent.h
+	PARENT_SCOPE
+)
+
+SET(SRCS
+	${SRCS}
+	${CMAKE_CURRENT_SOURCE_DIR}/TracePrintRequestedEvent.cpp
+	PARENT_SCOPE
+)
+
+set(LIB_INCLUDE_PATH
+	${LIB_INCLUDE_PATH}
+	${CMAKE_CURRENT_SOURCE_DIR}
+	PARENT_SCOPE
+)

src/lib/eventsystem/event/GameSpeedChangedEvent.h

@@ -0,0 +1,14 @@
+#ifndef GAME_SPEED_CHANGED_EVENT_H
+#define GAME_SPEED_CHANGED_EVENT_H
+
+#include "Event.h"
+
+class GameSpeedChangedEvent : public Event
+{
+public:
+	explicit GameSpeedChangedEvent(double speed) : speed(speed) {}
+	const double speed;
+};
+
+#endif   // GAME_SPEED_CHANGED_EVENT_H
+

src/lib/eventsystem/event/TickAdvancedEvent.h

@@ -0,0 +1,15 @@
+#ifndef TICK_ADVANCED_EVENT_H
+#define TICK_ADVANCED_EVENT_H
+
+#include "Event.h"
+#include "Tick.h"
+
+class TickAdvancedEvent : public Event
+{
+public:
+	explicit TickAdvancedEvent(Tick tick) : tick(tick) {}
+	const Tick tick;
+};
+
+#endif   // TICK_ADVANCED_EVENT_H
+

src/lib/eventsystem/event/TracePrintRequestedEvent.cpp

@@ -0,0 +1 @@
+#include "TracePrintRequestedEvent.h"

src/lib/eventsystem/event/TracePrintRequestedEvent.h

@@ -0,0 +1,10 @@
+#ifndef TRACE_PRINT_REQUESTED_EVENT_H
+#define TRACE_PRINT_REQUESTED_EVENT_H
+
+#include "Event.h"
+
+class TracePrintRequestedEvent : public Event
+{
+};
+
+#endif   // TRACE_PRINT_REQUESTED_EVENT_H

src/lib/sim/BeltSystem.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 
 #include "Tick.h"
+#include "tracing.h"
 
 // ---------------------------------------------------------------------------
 // Helpers
@@ -46,8 +47,8 @@ QPointF BeltSystem::slotWorldPos(QPoint tile, Rotation dir, double progress)
 // Construction / placement
 // ---------------------------------------------------------------------------
 
-BeltSystem::BeltSystem(double beltSpeedTilesPerSecond)
+BeltSystem::BeltSystem(double beltSpeed_tps)
-    : m_progressPerTick(beltSpeedTilesPerSecond * kTickDurationSeconds)
+    : m_progressPerTick_tpt(beltSpeed_tps * kTickDurationSeconds)
 {
 }
 
@@ -396,6 +397,7 @@ void BeltSystem::clearTiles(const std::vector<QPoint>& tiles)
 
 void BeltSystem::tick()
 {
+	TRACE();
     advanceProgress();
     advanceTunnelProgress();
     moveItemsToNextTile();
@@ -412,7 +414,7 @@ void BeltSystem::advanceProgress()
 
         for (std::size_t i = 0; i < bt.itemSlots.size(); ++i)
         {
-            bt.itemSlots[i].progress += m_progressPerTick;
+            bt.itemSlots[i].progress += m_progressPerTick_tpt;
 
             // Absolute cap: slot i cannot exceed 1.0 - i * 0.25.
             const double absoluteCap = 1.0 - i * 0.25;
@@ -440,7 +442,7 @@ void BeltSystem::advanceProgress()
 
         for (std::size_t i = 0; i < st.back.size(); ++i)
         {
-            st.back[i].progress += m_progressPerTick;
+            st.back[i].progress += m_progressPerTick_tpt;
             const double absoluteCap = 0.5 - i * 0.25;
             if (st.back[i].progress > absoluteCap)
             {
@@ -463,7 +465,7 @@ void BeltSystem::advanceProgress()
 
         if (st.frontA)
         {
-            st.frontA->progress += m_progressPerTick;
+            st.frontA->progress += m_progressPerTick_tpt;
             if (st.frontA->progress > 1.0)
             {
                 st.frontA->progress = 1.0;
@@ -472,7 +474,7 @@ void BeltSystem::advanceProgress()
 
         if (st.frontB)
         {
-            st.frontB->progress += m_progressPerTick;
+            st.frontB->progress += m_progressPerTick_tpt;
             if (st.frontB->progress > 1.0)
             {
                 st.frontB->progress = 1.0;
@@ -490,7 +492,7 @@ void BeltSystem::advanceTunnelProgress()
 
         for (std::size_t i = 0; i < te.itemSlots.size(); ++i)
         {
-            te.itemSlots[i].progress += m_progressPerTick;
+            te.itemSlots[i].progress += m_progressPerTick_tpt;
 
             const double absoluteCap = 1.0 - i * 0.25;
             if (te.itemSlots[i].progress > absoluteCap)
@@ -516,7 +518,7 @@ void BeltSystem::advanceTunnelProgress()
 
         for (std::size_t i = 0; i < tx.itemSlots.size(); ++i)
         {
-            tx.itemSlots[i].progress += m_progressPerTick;
+            tx.itemSlots[i].progress += m_progressPerTick_tpt;
 
             const double absoluteCap = 1.0 - i * 0.25;
             if (tx.itemSlots[i].progress > absoluteCap)
@@ -540,7 +542,7 @@ void BeltSystem::advanceTunnelProgress()
         for (std::size_t i = 0; i < link.items.size(); ++i)
         {
             TunnelTransitItem& ti = link.items[i];
-            ti.progress += m_progressPerTick;
+            ti.progress += m_progressPerTick_tpt;
             if (ti.progress > link.length)
             {
                 ti.progress = link.length;
@@ -960,3 +962,4 @@ void BeltSystem::forEachVisualItem(QRect viewportTiles,
         }
     }
 }
+

src/lib/sim/BeltSystem.h

@@ -31,7 +31,7 @@ struct VisualItem
 class BeltSystem
 {
 public:
-    explicit BeltSystem(double beltSpeedTilesPerSecond);
+    explicit BeltSystem(double beltSpeed_tps);
 
     // -- Placement -----------------------------------------------------------
     // Register a new belt tile.  Any items already on this tile are cleared.
@@ -170,7 +170,7 @@ private:
         std::vector<TunnelTransitItem> items;  // front (highest progress) to back
     };
 
-    double m_progressPerTick;  // beltSpeedTilesPerSecond / kTickRateHz
+    double m_progressPerTick_tpt;  // beltSpeed_tps / kTickRateHz
 
     std::map<std::pair<int, int>, BeltTile>        m_belts;
     std::map<std::pair<int, int>, SplitterTile>    m_splitters;

src/lib/sim/BuildingSystem.cpp

@@ -6,6 +6,7 @@
 #include <set>
 
 #include "SurfaceMask.h"
+#include "tracing.h"
 
 BuildingSystem::BuildingSystem(const GameConfig& config,
                                BeltSystem& belts,
@@ -410,6 +411,7 @@ void BuildingSystem::setShipLayout(BuildingId id, const ShipLayoutConfig& layout
 
 void BuildingSystem::tickConstruction(Tick currentTick)
 {
+	TRACE();
     if (m_constructionQueue.empty())
     {
         return;
@@ -516,6 +518,7 @@ void BuildingSystem::tickConstruction(Tick currentTick)
 
 void BuildingSystem::tickBeltPull()
 {
+	TRACE();
     for (Building& building : m_buildings)
     {
         // HQ: pull building_block items and add to global stock.
@@ -591,6 +594,7 @@ void BuildingSystem::tickBeltPull()
 
 void BuildingSystem::tickProduction(Tick currentTick)
 {
+	TRACE();
     for (Building& building : m_buildings)
     {
         // Skip types without a recipe-based production loop.
@@ -694,6 +698,7 @@ void BuildingSystem::tickProduction(Tick currentTick)
 
 void BuildingSystem::tickShipyardProduction(Tick currentTick)
 {
+	TRACE();
     for (Building& building : m_buildings)
     {
         if (building.type != BuildingType::Shipyard)
@@ -795,6 +800,7 @@ void BuildingSystem::tickShipyardProduction(Tick currentTick)
 
 void BuildingSystem::tickBeltPush()
 {
+	TRACE();
     for (Building& building : m_buildings)
     {
         if (building.outputBuffer.items.empty())

src/lib/sim/Simulation.cpp

@@ -7,6 +7,7 @@
 #include "CombatSystem.h"
 #include "DynamicBodySystem.h"
 #include "FactionComponent.h"
+#include "EventManager.h"
 #include "HealthComponent.h"
 #include "ModuleOwnerComponent.h"
 #include "MovementIntentSystem.h"
@@ -16,6 +17,7 @@
 #include "ShipSystem.h"
 #include "StationBodyComponent.h"
 #include "SurfaceMask.h"
+#include "tracing.h"
 #include "WaveSystem.h"
 #include "WeaponComponent.h"
 
@@ -31,7 +33,7 @@ Simulation::Simulation(GameConfig config, unsigned int seed)
     , m_hqProxyEntity(entt::null)
     , m_playerStation1Entity(entt::null)
     , m_playerStation2Entity(entt::null)
-    , m_beltSystem(m_config.world.beltSpeedTilesPerSecond)
+    , m_beltSystem(m_config.world.beltSpeed_tps)
 {
     m_currentEnemyStationEntities[0] = entt::null;
     m_currentEnemyStationEntities[1] = entt::null;
@@ -70,9 +72,13 @@ Simulation::Simulation(GameConfig config, unsigned int seed)
     }
 
     placeInitialStructures();
+	registerForEvents();
 }
 
-Simulation::~Simulation() = default;
+Simulation::~Simulation()
+{
+	unregisterForEvents();
+}
 
 const GameConfig& Simulation::config() const
 {
@@ -87,6 +93,7 @@ void Simulation::reset(GameConfig newConfig, unsigned int seed)
 
 void Simulation::reset(unsigned int seed)
 {
+	EventManager::getInstance()->clearEvents();
     m_rng.seed(seed);
     m_currentTick              = 0;
     m_nextDepartureTick        = secondsToTicks(m_config.world.departureIntervalSeconds);
@@ -103,7 +110,7 @@ void Simulation::reset(unsigned int seed)
     m_schematicDropEvents.clear();
 
     m_admin.clear();
-    m_beltSystem = BeltSystem(m_config.world.beltSpeedTilesPerSecond);
+    m_beltSystem = BeltSystem(m_config.world.beltSpeed_tps);
     m_buildingSystem = std::make_unique<BuildingSystem>(
         m_config,
         m_beltSystem,
@@ -146,6 +153,8 @@ void Simulation::reset(unsigned int seed)
 
 void Simulation::tick()
 {
+	EventManager::getInstance()->processEvents();
+
     // Step 1: wave scheduler
     m_waveSystem->tickWaveScheduler(m_currentTick, *m_shipSystem,
                                     m_config.world.heightTiles);
@@ -235,11 +244,13 @@ void Simulation::placeInitialStructures()
     const float psHp = static_cast<float>(
         m_config.stations.playerStation.hpFormula.evaluate(psLevel));
 
+    const float tileSize = static_cast<float>(m_config.world.tileSize_m);
+
     WeaponComponent psWeapon;
     psWeapon.damage        = static_cast<float>(
         m_config.stations.playerStation.damageFormula.evaluate(psLevel));
-    psWeapon.range         = static_cast<float>(
+    psWeapon.range_tiles   = static_cast<float>(
-        m_config.stations.playerStation.rangeFormula.evaluate(psLevel));
+        m_config.stations.playerStation.rangeFormula.evaluate(psLevel)) / tileSize;
     psWeapon.fireRateHz    = static_cast<float>(
         m_config.stations.playerStation.fireRateFormula.evaluate(psLevel));
     psWeapon.cooldownTicks  = 0.0f;
@@ -294,6 +305,7 @@ void Simulation::placeInitialStructures()
 
 void Simulation::placeEnemyStationSet(int generation)
 {
+    const float tileSize = static_cast<float>(m_config.world.tileSize_m);
     const ParsedSurfaceMask esParsed =
         parseSurfaceMask(m_config.stations.enemyStation.surfaceMask, Rotation::East);
 
@@ -309,8 +321,8 @@ void Simulation::placeEnemyStationSet(int generation)
     WeaponComponent esWeapon;
     esWeapon.damage        = static_cast<float>(
         m_config.stations.enemyStation.damageFormula.evaluate(genD));
-    esWeapon.range         = static_cast<float>(
+    esWeapon.range_tiles   = static_cast<float>(
-        m_config.stations.enemyStation.rangeFormula.evaluate(genD));
+        m_config.stations.enemyStation.rangeFormula.evaluate(genD)) / tileSize;
     esWeapon.fireRateHz    = static_cast<float>(
         m_config.stations.enemyStation.fireRateFormula.evaluate(genD));
     esWeapon.cooldownTicks  = 0.0f;
@@ -361,6 +373,7 @@ void Simulation::placeEnemyStationSet(int generation)
 
 void Simulation::tickDeathsAndLoot()
 {
+	TRACE();
     // --- Dead ships ---
     std::vector<entt::entity> deadShips;
     m_admin.forEach<ShipIdentityComponent, HealthComponent>(
@@ -638,6 +651,11 @@ const EntityAdmin& Simulation::admin() const
     return m_admin;
 }
 
+void Simulation::handleEvent(std::shared_ptr<const TracePrintRequestedEvent> event)
+{
+	PRINT_TRACES();
+}
+
 BuildingId Simulation::allocateBuildingId()
 {
     return m_nextBuildingId++;

src/lib/sim/Simulation.h

@@ -10,15 +10,16 @@
 
 #include "BeltSystem.h"
 #include "EntityAdmin.h"
-
 #include "entt/entity/entity.hpp"
 #include "SchematicDropEvent.h"
 #include "BuildingType.h"
 #include "BuildingId.h"
+#include "EventHandler.h"
 #include "FireEvent.h"
 #include "GameConfig.h"
 #include "Rotation.h"
 #include "Tick.h"
+#include "TracePrintRequestedEvent.h"
 
 class AiSystem;
 class BuildingSystem;
@@ -29,7 +30,7 @@ class ShipSystem;
 class ScrapSystem;
 class WaveSystem;
 
-class Simulation
+class Simulation: public CombinedEventHandler<TracePrintRequestedEvent>
 {
 public:
     explicit Simulation(GameConfig config, unsigned int seed = 0);
@@ -83,6 +84,8 @@ public:
     const EntityAdmin&    admin() const;
 
 private:
+	void handleEvent(std::shared_ptr<const TracePrintRequestedEvent> event) override;
+
     BuildingId allocateBuildingId();  // Strictly increasing; never returns kInvalidBuildingId.
 
     // Populate HQ, player defence stations, and the first enemy station set.

src/lib/sim/WaveSystem.cpp

@@ -3,6 +3,7 @@
 #include <algorithm>
 
 #include "ShipSystem.h"
+#include "tracing.h"
 
 WaveSystem::WaveSystem(const GameConfig& config, std::mt19937& rng)
     : m_config(config)
@@ -15,6 +16,7 @@ WaveSystem::WaveSystem(const GameConfig& config, std::mt19937& rng)
 void WaveSystem::tickWaveScheduler(Tick currentTick, ShipSystem& ships,
                                     int worldHeightTiles)
 {
+	TRACE();
     // 1. Advance boss countdown.
     --m_bossCountdownTicks;
 
@@ -75,6 +77,7 @@ void WaveSystem::tickWaveScheduler(Tick currentTick, ShipSystem& ships,
 
 void WaveSystem::tickThreatAccumulation()
 {
+	TRACE();
     const double x    = static_cast<double>(m_bossWaveCounter);
     const double rate = m_config.world.waves.threatRateFormula.evaluate(x);
     if (rate > 0.0)

src/lib/utility/CMakeLists.txt

@@ -4,12 +4,14 @@ add_subdirectory(random)
 
 SET(HDRS
 	${HDRS}
+	${CMAKE_CURRENT_SOURCE_DIR}/tracing.h
 	${CMAKE_CURRENT_SOURCE_DIR}/utilityRandom.h
 	PARENT_SCOPE
 )
 
 SET(SRCS
 	${SRCS}
+	${CMAKE_CURRENT_SOURCE_DIR}/tracing.cpp
 	${CMAKE_CURRENT_SOURCE_DIR}/utilityRandom.cpp
 	PARENT_SCOPE
 )

src/lib/utility/tracing.cpp

@@ -0,0 +1,279 @@
+#include "tracing.h"
+
+#include <iostream>
+#include <set>
+
+std::shared_ptr<Tracer> Tracer::s_instance;
+long long int Tracer::s_nextTraceId = 0;
+
+Tracer* Tracer::getInstance()
+{
+	if (!s_instance)
+	{
+		s_instance = std::shared_ptr<Tracer>(new Tracer());
+	}
+
+	return s_instance.get();
+}
+
+std::shared_ptr<TraceEvent> Tracer::startEvent(const std::string& eventName)
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	const std::thread::id id = std::this_thread::get_id();
+
+	std::shared_ptr<TraceEvent> event =
+		std::make_shared<TraceEvent>(eventName, s_nextTraceId++, m_startedEvents[id].size());
+
+	m_events[id].push_back(event);
+	m_startedEvents[id].push(event.get());
+
+	return event;
+}
+
+void Tracer::finishEvent(std::shared_ptr<TraceEvent> event)
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	const std::thread::id id = std::this_thread::get_id();
+
+	m_startedEvents[id].pop();
+}
+
+void Tracer::printTraces()
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	size_t unfinishEvents = 0;
+	for (auto& p : m_startedEvents)
+	{
+		unfinishEvents += p.second.size();
+	}
+
+	if (unfinishEvents > 0)
+	{
+		std::cout << "TRACING: Trace events are still running." << std::endl;
+		return;
+	}
+	else if (m_events.empty())
+	{
+		std::cout << "TRACING: No trace events collected." << std::endl;
+		return;
+	}
+
+
+	std::cout << "TRACING\n--------------------------\n" << std::endl;
+
+	std::cout << "HISTORY:\n\n";
+	std::cout << "    time                 name                     function";
+	std::cout << "                                          location\n";
+	std::cout << "-----------------------------------------------------------------";
+	std::cout << "------------------------------------------------------------\n";
+
+	for (auto& p : m_events)
+	{
+		std::cout << "thread: " << p.first << std::endl;
+
+		for (const std::shared_ptr<TraceEvent>& event : p.second)
+		{
+			std::cout.width(8 + 2 * event->depth);
+			std::cout << std::right /*<< std::setprecision(3)*/ << std::fixed << event->time;
+
+			std::cout.width(17 - 2 * event->depth);
+			std::cout << " ";
+
+			std::cout.width(25);
+			std::cout << std::left << event->eventName;
+
+			std::cout.width(50);
+			std::cout << (event->functionName + "()") << event->locationName << std::endl;
+		}
+
+		std::cout << std::endl;
+	}
+
+	std::cout << "\nREPORT:\n\n";
+	std::cout << "    time      count      name                     function";
+	std::cout << "                                          location\n";
+	std::cout << "-----------------------------------------------------------------";
+	std::cout << "------------------------------------------------------------\n";
+
+	struct AccumulatedTraceEvent
+	{
+		TraceEvent* event;
+		size_t count;
+		float time;
+	};
+
+	std::map<std::string, AccumulatedTraceEvent> accumulatedEvents;
+
+	for (auto& p : m_events)
+	{
+		for (const std::shared_ptr<TraceEvent>& event : p.second)
+		{
+			const std::string name = event->eventName + event->functionName + event->locationName;
+
+			std::pair<std::map<std::string, AccumulatedTraceEvent>::iterator, bool> p =
+				accumulatedEvents.emplace(name, AccumulatedTraceEvent());
+
+			AccumulatedTraceEvent* acc = &p.first->second;
+			if (p.second)
+			{
+				acc->event = event.get();
+				acc->time = event->time;
+				acc->count = 1;
+			}
+			else
+			{
+				acc->time += event->time;
+				acc->count++;
+			}
+		}
+	}
+
+	std::multiset<AccumulatedTraceEvent,
+		std::function<bool(const AccumulatedTraceEvent&, const AccumulatedTraceEvent&)>> sortedEvents(
+			[](const AccumulatedTraceEvent& a, const AccumulatedTraceEvent& b)
+	{
+		return a.time > b.time;
+	}
+	);
+
+	for (const std::pair<std::string, AccumulatedTraceEvent>& p : accumulatedEvents)
+	{
+		sortedEvents.insert(p.second);
+	}
+
+	for (const AccumulatedTraceEvent& acc : sortedEvents)
+	{
+		std::cout.width(8);
+		std::cout << std::right/* << std::setprecision(3)*/ << std::fixed << acc.time;
+
+		std::cout.width(10);
+		std::cout << acc.count << "       ";
+
+		std::cout.width(25);
+		std::cout << std::left << acc.event->eventName;
+
+		std::cout.width(50);
+		std::cout << (acc.event->functionName + "()") << acc.event->locationName << std::endl;
+	}
+
+	std::cout << std::endl;
+
+	m_events.clear();
+}
+
+Tracer::Tracer()
+{
+}
+
+
+std::shared_ptr<AccumulatingTracer> AccumulatingTracer::s_instance;
+long long int AccumulatingTracer::s_nextTraceId = 0;
+
+AccumulatingTracer* AccumulatingTracer::getInstance()
+{
+	if (!s_instance)
+	{
+		s_instance = std::shared_ptr<AccumulatingTracer>(new AccumulatingTracer());
+	}
+
+	return s_instance.get();
+}
+
+std::shared_ptr<TraceEvent> AccumulatingTracer::startEvent(const std::string& eventName)
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	const std::thread::id id = std::this_thread::get_id();
+
+	std::shared_ptr<TraceEvent> event =
+		std::make_shared<TraceEvent>(eventName, s_nextTraceId++, m_startedEvents[id].size());
+
+	m_startedEvents[id].push(event.get());
+
+	return event;
+}
+
+void AccumulatingTracer::finishEvent(std::shared_ptr<TraceEvent> event)
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	const std::thread::id id = std::this_thread::get_id();
+
+	m_startedEvents[id].pop();
+
+	const std::string name = event->eventName + event->functionName + event->locationName;
+
+	std::pair<std::map<std::string, AccumulatedTraceEvent>::iterator, bool> p =
+		m_accumulatedEvents.emplace(name, AccumulatedTraceEvent());
+
+	AccumulatedTraceEvent* acc = &p.first->second;
+	if (p.second)
+	{
+		acc->event = TraceEvent(*(event.get()));
+		acc->time = event->time;
+		acc->count = 1;
+	}
+	else
+	{
+		acc->time += event->time;
+		acc->count++;
+	}
+}
+
+void AccumulatingTracer::printTraces()
+{
+	std::lock_guard<std::mutex> lock(m_mutex);
+
+	for (auto& p : m_startedEvents)
+	{
+		if (!p.second.empty())
+		{
+			std::cout << "TRACING: Trace events are still running." << std::endl;
+		}
+	}
+
+	std::cout << "\nREPORT:\n\n";
+	std::cout << "    time      count      name                     function";
+	std::cout << "                                          location\n";
+	std::cout << "-----------------------------------------------------------------";
+	std::cout << "------------------------------------------------------------\n";
+
+	std::multiset<AccumulatedTraceEvent,
+			std::function<bool (const AccumulatedTraceEvent&, const AccumulatedTraceEvent&)>> sortedEvents(
+		[](const AccumulatedTraceEvent& a, const AccumulatedTraceEvent& b)
+		{
+			return a.time > b.time;
+		}
+	);
+
+	for (const std::pair<std::string, AccumulatedTraceEvent>& p : m_accumulatedEvents)
+	{
+		sortedEvents.insert(p.second);
+	}
+
+	for (const AccumulatedTraceEvent& acc : sortedEvents)
+	{
+		std::cout.width(8);
+		std::cout << std::right/* << std::setprecision(3)*/ << std::fixed << acc.time;
+
+		std::cout.width(10);
+		std::cout << acc.count << "       ";
+
+		std::cout.width(25);
+		std::cout << std::left << acc.event.eventName;
+
+		std::cout.width(50);
+		std::cout << (acc.event.functionName + "()") << acc.event.locationName << std::endl;
+	}
+
+	std::cout << std::endl;
+
+	m_accumulatedEvents.clear();
+}
+
+AccumulatingTracer::AccumulatingTracer()
+{
+}

src/lib/utility/tracing.h

@@ -0,0 +1,156 @@
+#ifndef TRACING_H
+#define TRACING_H
+
+
+//#define TRACING_ENABLED
+//#define USE_ACCUMULATED_TRACING
+
+
+#include <map>
+#include <mutex>
+#include <stack>
+#include <thread>
+
+#include <QDateTime>
+#include <QFileInfo>
+
+struct TraceEvent
+{
+public:
+	TraceEvent()
+		: eventName("")
+		, id(0)
+		, depth(0)
+		, time(0.0)
+	{
+	}
+
+	TraceEvent(const std::string& eventName, long long int id, size_t depth)
+		: eventName(eventName)
+		, id(id)
+		, depth(depth)
+		, time(0.0)
+	{
+	}
+
+	std::string eventName;
+	long long int id;
+	size_t depth;
+
+	std::string functionName;
+	std::string locationName;
+
+	double time;
+};
+
+
+class Tracer
+{
+public:
+	static Tracer* getInstance();
+
+	std::shared_ptr<TraceEvent> startEvent(const std::string& eventName);
+	void finishEvent(std::shared_ptr<TraceEvent> event);
+
+	void printTraces();
+
+private:
+	static std::shared_ptr<Tracer> s_instance;
+	static long long int s_nextTraceId;
+
+	Tracer();
+	Tracer(const Tracer&) = delete;
+	void operator=(const Tracer&) = delete;
+
+	std::map<std::thread::id, std::vector<std::shared_ptr<TraceEvent>>> m_events;
+	std::map<std::thread::id, std::stack<TraceEvent*>> m_startedEvents;
+
+	std::mutex m_mutex;
+};
+
+
+class AccumulatingTracer
+{
+public:
+	static AccumulatingTracer* getInstance();
+
+	std::shared_ptr<TraceEvent> startEvent(const std::string& eventName);
+	void finishEvent(std::shared_ptr<TraceEvent> event);
+
+	void printTraces();
+
+private:
+	struct AccumulatedTraceEvent
+	{
+		TraceEvent event;
+		size_t count;
+		double time;
+	};
+
+	static std::shared_ptr<AccumulatingTracer> s_instance;
+	static long long int s_nextTraceId;
+
+	AccumulatingTracer();
+	AccumulatingTracer(const AccumulatingTracer&) = delete;
+	void operator=(const AccumulatingTracer&) = delete;
+
+	std::map<std::string, AccumulatedTraceEvent> m_accumulatedEvents;
+	std::map<std::thread::id, std::stack<TraceEvent*>> m_startedEvents;
+
+	std::mutex m_mutex;
+};
+
+
+template <typename TracerType>
+class ScopedTrace
+{
+public:
+	ScopedTrace(const std::string& eventName, const std::string& fileName, int lineNumber, const std::string& functionName);
+	~ScopedTrace();
+
+private:
+	std::shared_ptr<TraceEvent> m_event;
+	QDateTime m_timeStamp;
+};
+
+template <typename TracerType>
+ScopedTrace<TracerType>::ScopedTrace(
+	const std::string& eventName, const std::string& fileName, int lineNumber, const std::string& functionName)
+{
+	m_event = TracerType::getInstance()->startEvent(eventName);
+	m_event->functionName = functionName;
+	m_event->locationName = QFileInfo(QString::fromStdString(fileName)).fileName().toStdString() + ":" + std::to_string(lineNumber);
+
+	m_timeStamp = QDateTime::currentDateTime();
+}
+
+template <typename TracerType>
+ScopedTrace<TracerType>::~ScopedTrace()
+{
+	m_event->time = m_timeStamp.msecsTo(QDateTime::currentDateTime());
+	TracerType::getInstance()->finishEvent(m_event);
+}
+
+
+#ifdef TRACING_ENABLED
+	#ifdef USE_ACCUMULATED_TRACING
+		#define TRACE(__name__) \
+			ScopedTrace<AccumulatingTracer> __trace__(std::string(__name__), __FILE__, __LINE__, __FUNCTION__)
+
+		#define PRINT_TRACES() \
+				AccumulatingTracer::getInstance()->printTraces()
+	#else
+		#define TRACE(__name__) \
+			ScopedTrace<Tracer> __trace__(std::string(__name__), __FILE__, __LINE__, __FUNCTION__)
+
+		#define PRINT_TRACES() \
+				Tracer::getInstance()->printTraces()
+	#endif
+
+
+#else
+	#define TRACE(__name__)
+	#define PRINT_TRACES()
+#endif
+
+#endif // TRACING_H

src/test/BehaviorSystemTest.cpp

@@ -62,7 +62,7 @@ struct Fixture
 
     explicit Fixture()
         : cfg(loadConfig())
-        , belts(cfg.world.beltSpeedTilesPerSecond)
+        , belts(cfg.world.beltSpeed_tps)
         , nextBuildingId(1)
         , stock(0)
         , rng(42)
@@ -188,13 +188,13 @@ TEST_CASE("BehaviorSystem: clearMovementIntents resets all ships to priority 0",
 // tickMovement
 // ---------------------------------------------------------------------------
 
-TEST_CASE("BehaviorSystem: tickMovement advances ship by maxSpeedPerTick toward target",
+TEST_CASE("BehaviorSystem: tickMovement advances ship by maxSpeed_tpt toward target",
           "[behavior]")
 {
     Fixture f;
     const entt::entity e = f.ships.spawn("interceptor", 1, QVector2D(0.0f, 0.0f));
 
-    const float speed = f.admin.get<DynamicBodyComponent>(e).maxSpeedPerTick;
+    const float speed = f.admin.get<DynamicBodyComponent>(e).maxSpeed_tpt;
     f.admin.get<MovementIntentComponent>(e) = MovementIntentComponent{1, QVector2D(100.0f, 0.0f)};
     f.movementIntent.tick(f.admin);
     f.dynamicBody.tick(f.admin);
@@ -209,7 +209,7 @@ TEST_CASE("BehaviorSystem: tickMovement stops exactly at target without overshoo
     Fixture f;
     const entt::entity e = f.ships.spawn("interceptor", 1, QVector2D(0.0f, 0.0f));
 
-    const float speed = f.admin.get<DynamicBodyComponent>(e).maxSpeedPerTick;
+    const float speed = f.admin.get<DynamicBodyComponent>(e).maxSpeed_tpt;
     const QVector2D target(speed * 0.5f, 0.0f);
     f.admin.get<MovementIntentComponent>(e) = MovementIntentComponent{1, target};
     f.movementIntent.tick(f.admin);
@@ -610,7 +610,7 @@ TEST_CASE("BehaviorSystem: tickRepairTools does not crash when owner lacks Repai
     const entt::entity moduleEntity = f.admin.createModuleEntity();
     RepairToolComponent rt;
     rt.ratePerTick    = 1.0f;
-    rt.range          = 10.0f;
+    rt.range_tiles    = 10.0f;
     rt.currentTarget  = std::nullopt;
     f.admin.addComponent<RepairToolComponent>(moduleEntity, rt);
     f.admin.addComponent<ModuleOwnerComponent>(moduleEntity, ModuleOwnerComponent{ownerShip});
@@ -861,7 +861,7 @@ TEST_CASE("SensorRange: sensorRange is populated from config formula at spawn",
 {
     Fixture f;
     const entt::entity e = f.ships.spawn("interceptor", 1, QVector2D(0.0f, 0.0f));
-    REQUIRE(f.admin.get<SensorRangeComponent>(e).value == Approx(200.0f));
+    REQUIRE(f.admin.get<SensorRangeComponent>(e).value_tiles == Approx(200.0f));
 }
 
 // ---------------------------------------------------------------------------

src/test/BuildingTest.cpp

@@ -71,7 +71,7 @@ static void runTicks(BuildingSystem& bs, BeltSystem& belts, int n, Tick& tick)
 TEST_CASE("BuildingSystem: place miner occupies expected body tiles", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -96,7 +96,7 @@ TEST_CASE("BuildingSystem: placing a belt registers it with BeltSystem after con
           "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -124,7 +124,7 @@ TEST_CASE("BuildingSystem: placing a belt registers it with BeltSystem after con
 TEST_CASE("BuildingSystem: placed building enters construction queue", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -144,7 +144,7 @@ TEST_CASE("BuildingSystem: placed building enters construction queue", "[buildin
 TEST_CASE("BuildingSystem: demolish frees tiles and returns refund", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -177,7 +177,7 @@ TEST_CASE("BuildingSystem: first queued building starts construction immediately
           "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -194,7 +194,7 @@ TEST_CASE("BuildingSystem: first queued building starts construction immediately
 TEST_CASE("BuildingSystem: second queued building waits (completesAt == 0)", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -215,7 +215,7 @@ TEST_CASE("BuildingSystem: second queued building waits (completesAt == 0)", "[b
 TEST_CASE("BuildingSystem: construction completes after configured duration", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -239,7 +239,7 @@ TEST_CASE("BuildingSystem: construction completes after configured duration", "[
 TEST_CASE("BuildingSystem: second building starts after first completes", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -268,7 +268,7 @@ TEST_CASE("BuildingSystem: second building starts after first completes", "[buil
 TEST_CASE("BuildingSystem: miner produces iron_ore after recipe duration", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -297,7 +297,7 @@ TEST_CASE("BuildingSystem: miner produces iron_ore after recipe duration", "[bui
 TEST_CASE("BuildingSystem: miner output buffer stalls when full", "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -456,7 +456,7 @@ TEST_CASE("BuildingSystem: reprocessing plant output buffer capacity equals max
           "[building]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -544,7 +544,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget returns nullopt when tile is
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -562,7 +562,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget returns the site id for a que
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -584,7 +584,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget returns the building id for a
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -610,7 +610,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget returns nullopt when building
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -631,7 +631,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget returns nullopt when footprin
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -654,7 +654,7 @@ TEST_CASE("BuildingSystem: findRotateInPlaceTarget works for a symmetric multi-t
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -682,7 +682,7 @@ TEST_CASE("BuildingSystem: rotateInPlace updates the rotation field of a constru
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -704,7 +704,7 @@ TEST_CASE("BuildingSystem: rotateInPlace preserves the construction progress of
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -727,7 +727,7 @@ TEST_CASE("BuildingSystem: rotateInPlace updates rotation and output port direct
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;
@@ -757,7 +757,7 @@ TEST_CASE("BuildingSystem: rotateInPlace re-registers a belt tile with BeltSyste
           "[building][rotate-in-place]")
 {
     const GameConfig cfg = loadConfig();
-    BeltSystem belts(cfg.world.beltSpeedTilesPerSecond);
+    BeltSystem belts(cfg.world.beltSpeed_tps);
     int stock = 0;
     std::mt19937 rng(0);
     BuildingId nextBuildingId = 1;

src/test/CombatSystemTest.cpp

@@ -66,7 +66,7 @@ struct CombatFixture
         : cfg(loadConfig())
         , rng(42)
         , nextBuildingId(1)
-        , belts(cfg.world.beltSpeedTilesPerSecond)
+        , belts(cfg.world.beltSpeed_tps)
         , ships(cfg, admin)
         , buildings(cfg, belts,
                     [this]() { return nextBuildingId++; },

src/test/ConfigLoaderTest.cpp

@@ -70,7 +70,7 @@ TEST_CASE("ConfigLoader loads the committed bin/config/ configs end-to-end", "[c
     // world.toml
     REQUIRE(cfg.world.heightTiles == 60);
     REQUIRE(cfg.world.refundPercentage == 75);
-    REQUIRE(cfg.world.beltSpeedTilesPerSecond == Approx(2.0));
+    REQUIRE(cfg.world.beltSpeed_tps == Approx(2.0));
     REQUIRE(cfg.world.regions.asteroidWidth == 40);
     REQUIRE(cfg.world.regions.playerBufferWidth == 10);
     REQUIRE(cfg.world.regions.enemyBufferWidth == 15);
@@ -158,7 +158,8 @@ TEST_CASE("Missing field in world.toml is rejected with the field path", "[confi
 height_tiles = 60
 refund_percentage = 75
 scrap_despawn_seconds = 30
-belt_speed_tiles_per_second = 2
+tile_size_m = 10
+belt_speed_mps = 20
 starting_building_blocks = 100
 tunnel_max_distance = 10
 departure_interval_seconds = 20
@@ -205,7 +206,8 @@ TEST_CASE("Malformed formula in world.toml is rejected with field identification
 height_tiles = 60
 refund_percentage = 75
 scrap_despawn_seconds = 30
-belt_speed_tiles_per_second = 2
+tile_size_m = 10
+belt_speed_mps = 20
 starting_building_blocks = 100
 tunnel_max_distance = 10
 departure_interval_seconds = 20
@@ -253,7 +255,8 @@ TEST_CASE("Inverted wave gap range is rejected", "[config]")
 height_tiles = 60
 refund_percentage = 75
 scrap_despawn_seconds = 30
-belt_speed_tiles_per_second = 2
+tile_size_m = 10
+belt_speed_mps = 20
 
 [regions]
 asteroid_width = 40

src/test/ModuleConfigTest.cpp

@@ -41,7 +41,7 @@ TEST_CASE("ConfigLoader: loadModules parses additive modifiers", "[config][modul
     REQUIRE(sensor.statModifiers.size() == 1);
     CHECK(sensor.statModifiers[0].stat == "sensor_range");
     CHECK(sensor.statModifiers[0].modifierType == "additive");
-    CHECK(sensor.statModifiers[0].formula.evaluate(1.0) == Approx(10.0));
+    CHECK(sensor.statModifiers[0].formula.evaluate(1.0) == Approx(100.0));
 }
 
 TEST_CASE("ConfigLoader: loadShips parses layout field", "[config][ships]")

src/test/ShipModuleTest.cpp

@@ -139,7 +139,8 @@ TEST_CASE("Ship spawn: additive sensor module applies correctly", "[modules]")
     REQUIRE(def != nullptr);
 
     const double x = static_cast<double>(def->schematic.playerProductionLevel);
-    const float baseRange = static_cast<float>(def->sensor.sensorRangeFormula.evaluate(x));
+    const float tileSize = static_cast<float>(sim.config().world.tileSize_m);
+    const float baseRange_tiles = static_cast<float>(def->sensor.sensorRangeFormula.evaluate(x)) / tileSize;
 
     ShipLayoutConfig layout;
     PlacedModule pm;
@@ -153,9 +154,9 @@ TEST_CASE("Ship spawn: additive sensor module applies correctly", "[modules]")
         QVector2D(5.0f, 5.0f), false, layout);
 
     REQUIRE(sim.admin().isValid(e));
-    // sensor_booster has added_sensor_range_formula = "10"
+    // sensor_booster has added_sensor_range_formula = "100" m → 100/10 = 10 tiles
-    // final = base * 1.0 + 10 = base + 10
+    // final = baseRange_tiles * 1.0 + 10 = baseRange_tiles + 10
-    CHECK(sim.admin().get<SensorRangeComponent>(e).value == Approx(baseRange + 10.0f));
+    CHECK(sim.admin().get<SensorRangeComponent>(e).value_tiles == Approx(baseRange_tiles + 10.0f));
 }
 
 TEST_CASE("Ship spawn: multiple modules stack correctly", "[modules]")

src/test/ShipTest.cpp

@@ -110,14 +110,14 @@ TEST_CASE("ShipSystem: interceptor level 1 stats match config formulas", "[ship]
     // hp_formula = "40 + 5*x" at x=1 → 45
     REQUIRE(admin.get<HealthComponent>(e).maxHp == Approx(45.0f));
     REQUIRE(admin.get<HealthComponent>(e).hp    == Approx(45.0f));
-    // sensor_range_formula = "200"
+    // sensor_range_formula = "2000" m → 2000/10 = 200 tiles
-    REQUIRE(admin.get<SensorRangeComponent>(e).value == Approx(200.0f));
+    REQUIRE(admin.get<SensorRangeComponent>(e).value_tiles == Approx(200.0f));
 
-    // laser_cannon: damage_formula = "2", attack_range_formula = "5"
+    // laser_cannon: damage_formula = "2", attack_range_formula = "50" m → 50/10 = 5 tiles
     const entt::entity wc = firstWeaponChild(admin, e);
     REQUIRE(admin.isValid(wc));
-    REQUIRE(admin.get<WeaponComponent>(wc).damage == Approx(2.0f));
+    REQUIRE(admin.get<WeaponComponent>(wc).damage       == Approx(2.0f));
-    REQUIRE(admin.get<WeaponComponent>(wc).range  == Approx(5.0f));
+    REQUIRE(admin.get<WeaponComponent>(wc).range_tiles  == Approx(5.0f));
     REQUIRE(admin.get<WeaponComponent>(wc).cooldownTicks == Approx(0.0f));
 }
 
@@ -133,7 +133,7 @@ TEST_CASE("ShipSystem: interceptor level 5 hp matches formula", "[ship]")
     REQUIRE(admin.get<HealthComponent>(e).maxHp == Approx(65.0f));
 }
 
-TEST_CASE("ShipSystem: interceptor level 0 maxSpeedPerTick matches formula / kTickRateHz", "[ship]")
+TEST_CASE("ShipSystem: interceptor level 0 maxSpeed_tpt matches formula / tileSize / kTickRateHz", "[ship]")
 {
     EntityAdmin admin;
     const GameConfig cfg = loadConfig();
@@ -141,9 +141,9 @@ TEST_CASE("ShipSystem: interceptor level 0 maxSpeedPerTick matches formula / kTi
 
     const entt::entity e = ss.spawn("interceptor", 0, QVector2D(0.0f, 0.0f));
 
-    // speed_formula = "200 + 5*x" at x=0 → 200; maxSpeedPerTick = 200/30
+    // speed_formula = "2000 + 50*x" m/s at x=0 → 2000 m/s; maxSpeed_tpt = 2000/(10*30)
-    const float expected = 200.0f / static_cast<float>(kTickRateHz);
+    const float expected = 2000.0f / 10.0f / static_cast<float>(kTickRateHz);
-    REQUIRE(admin.get<DynamicBodyComponent>(e).maxSpeedPerTick == Approx(expected));
+    REQUIRE(admin.get<DynamicBodyComponent>(e).maxSpeed_tpt == Approx(expected));
 }
 
 // ---------------------------------------------------------------------------
@@ -175,14 +175,14 @@ TEST_CASE("ShipSystem: salvage_ship cargo capacity matches config", "[ship]")
     const ShipLayoutConfig layout = makeSingleModuleLayout("salvager");
     const entt::entity e = ss.spawn("salvage_ship", 1, QVector2D(0.0f, 0.0f), false, layout);
 
-    // salvager: cargo_capacity_formula = "10", collection_range_formula = "50"
+    // salvager: cargo_capacity_formula = "10", collection_range_formula = "500" m → 500/10 = 50 tiles
     const entt::entity sc = firstSalvageChild(admin, e);
     REQUIRE(admin.isValid(sc));
     REQUIRE(admin.get<SalvageCargoComponent>(sc).capacity == 10);
     REQUIRE(admin.get<SalvageCargoComponent>(sc).current  == 0);
     REQUIRE(admin.get<SalvageBehaviorComponent>(e).deliveryBay == kInvalidBuildingId);
     REQUIRE_FALSE(admin.get<SalvageBehaviorComponent>(e).scrapTarget.has_value());
-    REQUIRE(admin.get<SalvageBehaviorComponent>(e).maxCollectionRange == Approx(50.0f));
+    REQUIRE(admin.get<SalvageBehaviorComponent>(e).maxCollectionRange_tiles == Approx(50.0f));
 }
 
 // ---------------------------------------------------------------------------
@@ -219,9 +219,9 @@ TEST_CASE("ShipSystem: repair_ship level 1 repair stats match config formulas",
     const entt::entity rc = firstRepairChild(admin, e);
     REQUIRE(admin.isValid(rc));
     REQUIRE(admin.get<RepairToolComponent>(rc).ratePerTick == Approx(expectedRate));
-    // repair_range_formula = "80"
+    // repair_range_formula = "800" m → 800/10 = 80 tiles
-    REQUIRE(admin.get<RepairToolComponent>(rc).range == Approx(80.0f));
+    REQUIRE(admin.get<RepairToolComponent>(rc).range_tiles == Approx(80.0f));
-    REQUIRE(admin.get<RepairBehaviorComponent>(e).maxRepairRange == Approx(80.0f));
+    REQUIRE(admin.get<RepairBehaviorComponent>(e).maxRepairRange_tiles == Approx(80.0f));
 }
 
 // ---------------------------------------------------------------------------

src/test/WaveSystemTest.cpp

@@ -139,7 +139,7 @@ TEST_CASE("WaveSystem: player stations have weapon set", "[wave]")
             {
                 ++armedPlayerStations;
                 REQUIRE(w.damage     > 0.0f);
-                REQUIRE(w.range      > 0.0f);
+                REQUIRE(w.range_tiles > 0.0f);
                 REQUIRE(w.fireRateHz > 0.0f);
             }
         });
@@ -160,7 +160,7 @@ TEST_CASE("WaveSystem: enemy stations have weapon set", "[wave]")
             {
                 ++armedEnemyStations;
                 REQUIRE(w.damage     > 0.0f);
-                REQUIRE(w.range      > 0.0f);
+                REQUIRE(w.range_tiles > 0.0f);
                 REQUIRE(w.fireRateHz > 0.0f);
             }
         });

src/ui/BlueprintPanel.cpp

@@ -13,6 +13,7 @@
 #include <QVBoxLayout>
 
 #include "BlueprintSerializer.h"
+#include "BuildingBlocksChangedEvent.h"
 
 #include "Building.h"
 #include "BuildingSystem.h"
@@ -29,7 +30,7 @@ BlueprintPanel::BlueprintPanel(Simulation* sim, const GameConfig* config, QWidge
     layout->setContentsMargins(4, 4, 4, 4);
     layout->setSpacing(4);
 
-    m_createBtn = new QPushButton("Create Blueprint", this);
+    m_createBtn = new QPushButton(tr("Create Blueprint"), this);
     m_createBtn->setFixedHeight(48);
     m_createBtn->setEnabled(false);
     layout->addWidget(m_createBtn);
@@ -50,8 +51,8 @@ BlueprintPanel::BlueprintPanel(Simulation* sim, const GameConfig* config, QWidge
     connect(m_createBtn, &QPushButton::clicked, this, &BlueprintPanel::onCreateClicked);
 
     QHBoxLayout* ioLayout = new QHBoxLayout();
-    m_saveBtn = new QPushButton("Save", this);
+    m_saveBtn = new QPushButton(tr("Save"), this);
-    m_loadBtn = new QPushButton("Load", this);
+    m_loadBtn = new QPushButton(tr("Load"), this);
     m_saveBtn->setFixedHeight(36);
     m_loadBtn->setFixedHeight(36);
     ioLayout->addWidget(m_saveBtn);
@@ -60,6 +61,13 @@ BlueprintPanel::BlueprintPanel(Simulation* sim, const GameConfig* config, QWidge
 
     connect(m_saveBtn, &QPushButton::clicked, this, &BlueprintPanel::onSaveClicked);
     connect(m_loadBtn, &QPushButton::clicked, this, &BlueprintPanel::onLoadClicked);
+
+    registerForEvent();
+}
+
+BlueprintPanel::~BlueprintPanel()
+{
+    unregisterForEvent();
 }
 
 void BlueprintPanel::onSelectionChanged(const std::vector<BuildingId>& ids)
@@ -68,9 +76,9 @@ void BlueprintPanel::onSelectionChanged(const std::vector<BuildingId>& ids)
     refreshButtonStates();
 }
 
-void BlueprintPanel::onStateUpdated(Tick /*tick*/, int blocks, double /*speed*/)
+void BlueprintPanel::handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event)
 {
-    m_currentBlocks = blocks;
+    m_currentBlocks = event->blocks;
     refreshButtonStates();
 }
 
@@ -93,7 +101,7 @@ void BlueprintPanel::onCreateClicked()
 
     bool ok = false;
     const QString name = QInputDialog::getText(
-        this, "Create Blueprint", "Blueprint name:", QLineEdit::Normal, QString(), &ok);
+        this, tr("Create Blueprint"), tr("Blueprint name:"), QLineEdit::Normal, QString(), &ok);
     if (!ok || name.trimmed().isEmpty()) { return; }
 
     bp.name = name.trimmed();
@@ -223,7 +231,7 @@ void BlueprintPanel::rebuildButtons()
     {
         const Blueprint& bp   = m_blueprints[static_cast<std::size_t>(i)];
         const int        cost = computeBlueprintCost(bp);
-        const QString label   = bp.name + "\n" + QString::number(cost) + " Blocks";
+        const QString label   = bp.name + "\n" + tr("%1 Blocks").arg(cost);
 
         QWidget*     row       = new QWidget(m_buttonsContainer);
         QHBoxLayout* rowLayout = new QHBoxLayout(row);
@@ -266,26 +274,26 @@ void BlueprintPanel::onSaveClicked()
         QFile file(path);
         if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
         {
-            QMessageBox::critical(this, "Save Failed",
+            QMessageBox::critical(this, tr("Save Failed"),
-                QString("Could not open file for writing:\n%1").arg(path));
+                tr("Could not open file for writing:\n%1").arg(path));
             return;
         }
         file.write(QByteArray::fromStdString(content));
     }
     catch (const std::exception& e)
     {
-        QMessageBox::critical(this, "Save Failed",
+        QMessageBox::critical(this, tr("Save Failed"),
-            QString("Failed to save blueprints:\n%1").arg(e.what()));
+            tr("Failed to save blueprints:\n%1").arg(e.what()));
     }
 }
 
 void BlueprintPanel::onLoadClicked()
 {
     QMessageBox box(this);
-    box.setWindowTitle("Load Blueprints");
+    box.setWindowTitle(tr("Load Blueprints"));
-    box.setText("Load blueprints? This will replace all current blueprints.");
+    box.setText(tr("Load blueprints? This will replace all current blueprints."));
-    QPushButton* confirmBtn = box.addButton("Confirm", QMessageBox::AcceptRole);
+    QPushButton* confirmBtn = box.addButton(tr("Confirm"), QMessageBox::AcceptRole);
-    box.addButton("Cancel", QMessageBox::RejectRole);
+    box.addButton(tr("Cancel"), QMessageBox::RejectRole);
     box.exec();
     if (box.clickedButton() != confirmBtn) { return; }
 
@@ -295,8 +303,8 @@ void BlueprintPanel::onLoadClicked()
         QFile file(path);
         if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
         {
-            QMessageBox::critical(this, "Load Failed",
+            QMessageBox::critical(this, tr("Load Failed"),
-                QString("Could not open file:\n%1").arg(path));
+                tr("Could not open file:\n%1").arg(path));
             return;
         }
         const std::string content = file.readAll().toStdString();
@@ -313,8 +321,8 @@ void BlueprintPanel::onLoadClicked()
     }
     catch (const std::exception& e)
     {
-        QMessageBox::critical(this, "Load Failed",
+        QMessageBox::critical(this, tr("Load Failed"),
-            QString("Failed to load blueprints:\n%1").arg(e.what()));
+            tr("Failed to load blueprints:\n%1").arg(e.what()));
     }
 }
 

src/ui/BlueprintPanel.h

@@ -5,7 +5,9 @@
 #include <QWidget>
 
 #include "Blueprint.h"
+#include "BuildingBlocksChangedEvent.h"
 #include "BuildingId.h"
+#include "EventHandler.h"
 #include "GameConfig.h"
 #include "Tick.h"
 
@@ -14,22 +16,26 @@ class QPushButton;
 class QScrollArea;
 class QVBoxLayout;
 
-class BlueprintPanel : public QWidget
+class BlueprintPanel : public QWidget,
+                       public EventHandler<BuildingBlocksChangedEvent>
 {
     Q_OBJECT
 
 public:
     BlueprintPanel(Simulation* sim, const GameConfig* config, QWidget* parent = nullptr);
+    ~BlueprintPanel() override;
 
 public slots:
     void onSelectionChanged(const std::vector<BuildingId>& ids);
-    void onStateUpdated(Tick tick, int blocks, double speed);
     void clearActiveBlueprintButton();
 
 signals:
     void blueprintPlacementRequested(Blueprint blueprint);
     void exitBlueprintModeRequested();
 
+private:
+    void handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event) override;
+
 private slots:
     void onCreateClicked();
     void onDeleteBlueprintClicked(int index);

src/ui/BuildButtonGrid.cpp

@@ -63,7 +63,7 @@ BuildButtonGrid::BuildButtonGrid(const GameConfig* config, QWidget* parent)
         m_costs[def.type] = def.cost;
 
         const QString label = displayName(def.id)
-            + "\n" + QString::number(def.cost) + " Blocks";
+            + "\n" + tr("%1 Blocks").arg(def.cost);
         QPushButton* btn = new QPushButton(label, this);
         btn->setCheckable(true);
         btn->setFixedHeight(48);
@@ -83,7 +83,7 @@ BuildButtonGrid::BuildButtonGrid(const GameConfig* config, QWidget* parent)
     }
     connect(mapper, qOverload<int>(&QSignalMapper::mapped), this, &BuildButtonGrid::onBuildButton);
 
-    m_demolishButton = new QPushButton("Demolish", this);
+    m_demolishButton = new QPushButton(tr("Demolish"), this);
     m_demolishButton->setCheckable(true);
     m_demolishButton->setFixedHeight(48);
     layout->addWidget(m_demolishButton, row, col);

src/ui/GameWorldView.cpp

@@ -20,6 +20,7 @@
 #include "BeltSystem.h"
 #include "Building.h"
 #include "BuildingSystem.h"
+#include "EventManager.h"
 #include "FacingComponent.h"
 #include "FactionComponent.h"
 #include "HealthComponent.h"
@@ -32,6 +33,11 @@
 #include "StationBodyComponent.h"
 #include "SurfaceMask.h"
 #include "Tick.h"
+#include "TracePrintRequestedEvent.h"
+#include "BossWaveUpdatedEvent.h"
+#include "BuildingBlocksChangedEvent.h"
+#include "GameSpeedChangedEvent.h"
+#include "TickAdvancedEvent.h"
 
 namespace
 {
@@ -237,12 +243,33 @@ void GameWorldView::onFrame()
         clampScroll();
     }
 
-    // Emit state update for header bar / build grid
+    // Fire events for any state that changed since the last frame
-    emit stateUpdated(m_sim->currentTick(),
+    {
-                      m_sim->buildingBlocksStock(),
+        const Tick newTick      = m_sim->currentTick();
-                      m_gameSpeedMultiplier,
+        const int  newBlocks    = m_sim->buildingBlocksStock();
-                      m_sim->bossWaveCounter(),
+        const int  newBoss      = m_sim->bossWaveCounter();
-                      m_sim->bossCountdownTicks());
+        const Tick newCountdown = m_sim->bossCountdownTicks();
+
+        if (newTick != m_lastTick)
+        {
+            m_lastTick = newTick;
+            EventManager::getInstance()->sendEventImmediately(
+                std::make_shared<TickAdvancedEvent>(newTick));
+        }
+        if (newBlocks != m_lastBlocks)
+        {
+            m_lastBlocks = newBlocks;
+            EventManager::getInstance()->sendEventImmediately(
+                std::make_shared<BuildingBlocksChangedEvent>(newBlocks));
+        }
+        if (newBoss != m_lastBossCounter || newCountdown != m_lastBossCountdown)
+        {
+            m_lastBossCounter   = newBoss;
+            m_lastBossCountdown = newCountdown;
+            EventManager::getInstance()->sendEventImmediately(
+                std::make_shared<BossWaveUpdatedEvent>(newBoss, newCountdown));
+        }
+    }
 
     // Game over check
     if (m_sim->isGameOver() && !m_gameOverShown)
@@ -903,7 +930,7 @@ void GameWorldView::drawDebugSensorRanges(QPainter& painter)
             if (it == m_visuals->ships.end()) { return; }
 
             const QPointF center   = worldToWidget(pos.value);
-            const qreal   radiusPx = static_cast<qreal>(sensor.value)
+            const qreal   radiusPx = static_cast<qreal>(sensor.value_tiles)
                                      * static_cast<qreal>(tilePx());
             painter.setPen(QPen(it->second.outline, 1));
             painter.drawEllipse(center, radiusPx, radiusPx);
@@ -1132,9 +1159,12 @@ void GameWorldView::keyPressEvent(QKeyEvent* event)
     case Qt::Key_Backspace:
         toggleDemolishMode();
         break;
-    case Qt::Key_M:
+	case Qt::Key_M:
-        m_debugDraw = !m_debugDraw;
+		m_debugDraw = !m_debugDraw;
-        break;
+		break;
+	case Qt::Key_L:
+		EventManager::getInstance()->addEvent(std::make_shared<TracePrintRequestedEvent>());
+		break;
     default:
         QOpenGLWidget::keyPressEvent(event);
         break;
@@ -1398,11 +1428,8 @@ double GameWorldView::gameSpeed() const
 void GameWorldView::setGameSpeed(double multiplier)
 {
     m_gameSpeedMultiplier = multiplier;
-    emit stateUpdated(m_sim->currentTick(),
+    EventManager::getInstance()->sendEventImmediately(
-                      m_sim->buildingBlocksStock(),
+        std::make_shared<GameSpeedChangedEvent>(m_gameSpeedMultiplier));
-                      m_gameSpeedMultiplier,
-                      m_sim->bossWaveCounter(),
-                      m_sim->bossCountdownTicks());
 }
 
 void GameWorldView::resetForNewGame()
@@ -1422,8 +1449,12 @@ void GameWorldView::resetForNewGame()
     m_scrollLeft       = false;
     m_scrollRight      = false;
     m_gameOverShown    = false;
-    m_gameSpeedMultiplier  = 1.0;
     m_prevNonZeroSpeed     = 1.0;
+    m_lastTick          = Tick(-1);
+    m_lastBlocks        = -1;
+    m_lastBossCounter   = -1;
+    m_lastBossCountdown = Tick(-1);
     emit selectionChanged({});
+	setGameSpeed(1.0);
     update();
 }

src/ui/GameWorldView.h

@@ -47,7 +47,6 @@ public:
 
 signals:
     void selectionChanged(const std::vector<BuildingId>& ids);
-    void stateUpdated(Tick tick, int blocks, double speed, int bossCounter, Tick bossCountdownTicks);
     void gameOver();
     void builderModeExited();
     void blueprintModeExited();
@@ -173,4 +172,9 @@ private:
     bool m_scrollLeft;
     bool m_scrollRight;
     bool m_gameOverShown;
+
+    Tick m_lastTick          = Tick(-1);
+    int  m_lastBlocks        = -1;
+    int  m_lastBossCounter   = -1;
+    Tick m_lastBossCountdown = Tick(-1);
 };

src/ui/HeaderBar.cpp

@@ -21,8 +21,8 @@ HeaderBar::HeaderBar(QWidget* parent)
     layout->setSpacing(8);
 
     m_timeLabel   = new QLabel("00:00", this);
-    m_blocksLabel = new QLabel("Blocks: 0", this);
+    m_blocksLabel = new QLabel(tr("Blocks: 0"), this);
-    m_bossLabel   = new QLabel("Boss Wave #1  Next boss: 5:00", this);
+    m_bossLabel   = new QLabel(tr("Boss Wave #1  Next boss: 5:00"), this);
     layout->addWidget(m_timeLabel);
     layout->addWidget(m_blocksLabel);
     layout->addStretch();
@@ -41,41 +41,51 @@ HeaderBar::HeaderBar(QWidget* parent)
         connect(btn, &QPushButton::clicked, mapper, qOverload<>(&QSignalMapper::map));
     }
     connect(mapper, qOverload<int>(&QSignalMapper::mapped), this, &HeaderBar::onSpeedButton);
-	
+
     setFixedHeight(sizeHint().height());
+
+    registerForEvents();
 }
 
-void HeaderBar::onStateUpdated(Tick tick, int buildingBlocks, double gameSpeed,
+HeaderBar::~HeaderBar()
-                               int bossCounter, Tick bossCountdownTicks)
 {
-    const int totalSeconds = static_cast<int>(ticksToSeconds(tick));
+    unregisterForEvents();
-    const int minutes = totalSeconds / 60;
+}
-    const int seconds = totalSeconds % 60;
 
+void HeaderBar::handleEvent(std::shared_ptr<const TickAdvancedEvent> event)
+{
+    const int totalSeconds = static_cast<int>(ticksToSeconds(event->tick));
     m_timeLabel->setText(
         QString("%1:%2")
-            .arg(minutes, 2, 10, QChar('0'))
+            .arg(totalSeconds / 60, 2, 10, QChar('0'))
-            .arg(seconds, 2, 10, QChar('0')));
+            .arg(totalSeconds % 60, 2, 10, QChar('0')));
+}
 
-    m_blocksLabel->setText(QString("Blocks: %1").arg(buildingBlocks));
+void HeaderBar::handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event)
-
+{
-    const int bossSeconds = static_cast<int>(ticksToSeconds(
+    m_blocksLabel->setText(tr("Blocks: %1").arg(event->blocks));
-        bossCountdownTicks > 0 ? bossCountdownTicks : 0));
+}
-    const int bossMin = bossSeconds / 60;
-    const int bossSec = bossSeconds % 60;
-    m_bossLabel->setText(
-        QString("Boss Wave #%1  Next boss: %2:%3")
-            .arg(bossCounter)
-            .arg(bossMin)
-            .arg(bossSec, 2, 10, QChar('0')));
 
+void HeaderBar::handleEvent(std::shared_ptr<const GameSpeedChangedEvent> event)
+{
     for (int i = 0; i < kSpeedCount; ++i)
     {
-        const bool active = (std::abs(kSpeeds[i] - gameSpeed) < 0.001);
+        m_speedButtons[static_cast<std::size_t>(i)]->setChecked(
-        m_speedButtons[static_cast<std::size_t>(i)]->setChecked(active);
+            std::abs(kSpeeds[i] - event->speed) < 0.001);
     }
 }
 
+void HeaderBar::handleEvent(std::shared_ptr<const BossWaveUpdatedEvent> event)
+{
+    const int bossSeconds = static_cast<int>(
+        ticksToSeconds(event->countdownTicks > 0 ? event->countdownTicks : 0));
+    m_bossLabel->setText(
+        tr("Boss Wave #%1  Next boss: %2:%3")
+            .arg(event->counter)
+            .arg(bossSeconds / 60)
+            .arg(bossSeconds % 60, 2, 10, QChar('0')));
+}
+
 void HeaderBar::onSpeedButton(int index)
 {
     if (index >= 0 && index < kSpeedCount)
@@ -83,4 +93,3 @@ void HeaderBar::onSpeedButton(int index)
         emit speedChanged(kSpeeds[index]);
     }
 }
-

src/ui/HeaderBar.h

@@ -4,21 +4,27 @@
 
 #include <QWidget>
 
+#include "BossWaveUpdatedEvent.h"
+#include "BuildingBlocksChangedEvent.h"
+#include "EventHandler.h"
+#include "GameSpeedChangedEvent.h"
 #include "Tick.h"
+#include "TickAdvancedEvent.h"
 
 class QLabel;
 class QPushButton;
 
-class HeaderBar : public QWidget
+class HeaderBar : public QWidget,
+                  public CombinedEventHandler<TickAdvancedEvent,
+                                              BuildingBlocksChangedEvent,
+                                              GameSpeedChangedEvent,
+                                              BossWaveUpdatedEvent>
 {
     Q_OBJECT
 
 public:
     explicit HeaderBar(QWidget* parent = nullptr);
-
+    ~HeaderBar() override;
-public slots:
-    void onStateUpdated(Tick tick, int buildingBlocks, double gameSpeed,
-                        int bossCounter, Tick bossCountdownTicks);
 
 signals:
     void speedChanged(double multiplier);
@@ -27,6 +33,11 @@ private slots:
     void onSpeedButton(int index);
 
 private:
+    void handleEvent(std::shared_ptr<const TickAdvancedEvent> event) override;
+    void handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event) override;
+    void handleEvent(std::shared_ptr<const GameSpeedChangedEvent> event) override;
+    void handleEvent(std::shared_ptr<const BossWaveUpdatedEvent> event) override;
+
     QLabel*                  m_timeLabel;
     QLabel*                  m_blocksLabel;
     QLabel*                  m_bossLabel;

src/ui/MainWindow.cpp

@@ -11,6 +11,7 @@
 
 #include "BlueprintPanel.h"
 #include "BuildButtonGrid.h"
+#include "BuildingBlocksChangedEvent.h"
 #include "BuildingSystem.h"
 #include "ConfigLoader.h"
 #include "GameWorldView.h"
@@ -28,7 +29,7 @@ MainWindow::MainWindow(Simulation* sim, const std::string& configDir, QWidget* p
     , m_visuals(VisualsLoader::load(configDir + "/visuals.toml"))
     , m_sim(sim)
 {
-    setWindowTitle("Dota Factory");
+    setWindowTitle(tr("Dota Factory"));
     resize(1280, 768);
 
     m_headerBar = new HeaderBar(this);
@@ -52,15 +53,6 @@ MainWindow::MainWindow(Simulation* sim, const std::string& configDir, QWidget* p
     connect(m_gameWorldView, &GameWorldView::selectionChanged,
             m_selectedBuildingPanel, &SelectedBuildingPanel::onSelectionChanged);
 
-    connect(m_gameWorldView, &GameWorldView::stateUpdated,
-            m_headerBar, &HeaderBar::onStateUpdated);
-
-    connect(m_gameWorldView, &GameWorldView::stateUpdated,
-            this, &MainWindow::onStateUpdated);  // for affordability
-
-    connect(m_gameWorldView, &GameWorldView::stateUpdated,
-            m_selectedBuildingPanel, &SelectedBuildingPanel::onStateUpdated);
-
     connect(m_gameWorldView, &GameWorldView::gameOver,
             this, &MainWindow::onGameOver);
 
@@ -90,9 +82,6 @@ MainWindow::MainWindow(Simulation* sim, const std::string& configDir, QWidget* p
     connect(m_gameWorldView, &GameWorldView::selectionChanged,
             m_blueprintPanel, &BlueprintPanel::onSelectionChanged);
 
-    connect(m_gameWorldView, &GameWorldView::stateUpdated,
-            m_blueprintPanel, &BlueprintPanel::onStateUpdated);
-
     connect(m_blueprintPanel, &BlueprintPanel::blueprintPlacementRequested,
             m_gameWorldView, &GameWorldView::enterBlueprintMode);
 
@@ -127,11 +116,18 @@ MainWindow::MainWindow(Simulation* sim, const std::string& configDir, QWidget* p
         }
         catch (const std::exception& e)
         {
-            QMessageBox::critical(this, "Load Error",
+            QMessageBox::critical(this, tr("Load Error"),
-                QString("Failed to load ship_layouts.toml:\n%1").arg(e.what()));
+                tr("Failed to load ship_layouts.toml:\n%1").arg(e.what()));
             m_layoutBlueprints.clear();
         }
     }
+
+    registerForEvent();
+}
+
+MainWindow::~MainWindow()
+{
+    unregisterForEvent();
 }
 
 void MainWindow::resizeEvent(QResizeEvent* event)
@@ -172,9 +168,9 @@ void MainWindow::layoutPanels()
     m_bottomPanel->setGeometry(0, headerH + gameH, totalW, panelH);
 }
 
-void MainWindow::onStateUpdated(Tick /*tick*/, int blocks, double /*speed*/)
+void MainWindow::handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event)
 {
-    m_buildButtonGrid->updateAffordability(blocks);
+    m_buildButtonGrid->updateAffordability(event->blocks);
 }
 
 void MainWindow::onEscapeMenuRequested()
@@ -183,10 +179,10 @@ void MainWindow::onEscapeMenuRequested()
     m_gameWorldView->setGameSpeed(0.0);
 
     QMessageBox box(this);
-    box.setWindowTitle("Paused");
+    box.setWindowTitle(tr("Paused"));
-    QPushButton* continueBtn = box.addButton("Continue", QMessageBox::AcceptRole);
+    QPushButton* continueBtn = box.addButton(tr("Continue"), QMessageBox::AcceptRole);
-    QPushButton* restartBtn  = box.addButton("Restart",  QMessageBox::ResetRole);
+    QPushButton* restartBtn  = box.addButton(tr("Restart"),  QMessageBox::ResetRole);
-    QPushButton* quitBtn     = box.addButton("Quit",     QMessageBox::DestructiveRole);
+    QPushButton* quitBtn     = box.addButton(tr("Quit"),     QMessageBox::DestructiveRole);
     box.setEscapeButton(continueBtn);
     box.exec();
 
@@ -202,8 +198,8 @@ void MainWindow::onEscapeMenuRequested()
         }
         catch (const std::exception& e)
         {
-            QMessageBox::critical(this, "Config Error",
+            QMessageBox::critical(this, tr("Config Error"),
-                QString("Failed to reload config:\n%1").arg(e.what()));
+                tr("Failed to reload config:\n%1").arg(e.what()));
             m_gameWorldView->setGameSpeed(prevSpeed);
             return;
         }
@@ -255,12 +251,12 @@ void MainWindow::onGameOver()
     const int seconds = totalSeconds % 60;
 
     QMessageBox box(this);
-    box.setWindowTitle("Game Over");
+    box.setWindowTitle(tr("Game Over"));
-    box.setText(QString("HQ destroyed!\nSurvival time: %1:%2")
+    box.setText(tr("HQ destroyed!\nSurvival time: %1:%2")
         .arg(minutes, 2, 10, QChar('0'))
         .arg(seconds, 2, 10, QChar('0')));
-    QPushButton* restartBtn = box.addButton("Restart", QMessageBox::AcceptRole);
+    QPushButton* restartBtn = box.addButton(tr("Restart"), QMessageBox::AcceptRole);
-    box.addButton("Quit", QMessageBox::RejectRole);
+    box.addButton(tr("Quit"), QMessageBox::RejectRole);
     box.exec();
 
     if (box.clickedButton() == restartBtn)
@@ -274,8 +270,8 @@ void MainWindow::onGameOver()
         }
         catch (const std::exception& e)
         {
-            QMessageBox::critical(this, "Config Error",
+            QMessageBox::critical(this, tr("Config Error"),
-                QString("Failed to reload config:\n%1").arg(e.what()));
+                tr("Failed to reload config:\n%1").arg(e.what()));
             return;
         }
         m_gameWorldView->resetForNewGame();

src/ui/MainWindow.h

@@ -5,7 +5,9 @@
 
 #include <QWidget>
 
+#include "BuildingBlocksChangedEvent.h"
 #include "BuildingId.h"
+#include "EventHandler.h"
 #include "ShipLayoutBlueprint.h"
 #include "Tick.h"
 #include "VisualsConfig.h"
@@ -19,26 +21,29 @@ class BlueprintPanel;
 class QCloseEvent;
 class QResizeEvent;
 
-class MainWindow : public QWidget
+class MainWindow : public QWidget,
+                   public EventHandler<BuildingBlocksChangedEvent>
 {
     Q_OBJECT
 
 public:
     MainWindow(Simulation* sim, const std::string& configDir, QWidget* parent = nullptr);
+    ~MainWindow() override;
 
 protected:
     void resizeEvent(QResizeEvent* event) override;
     void closeEvent(QCloseEvent* event) override;
 
+private:
+    void handleEvent(std::shared_ptr<const BuildingBlocksChangedEvent> event) override;
+    void layoutPanels();
+
 private slots:
     void onGameOver();
-    void onStateUpdated(Tick tick, int blocks, double speed);
     void onEscapeMenuRequested();
     void onLayoutDialogRequested(BuildingId shipyardId);
 
 private:
-    void layoutPanels();
-
     std::string            m_configDir;
     VisualsConfig          m_visuals;
     Simulation*            m_sim;

src/ui/SelectedBuildingPanel.cpp

@@ -13,6 +13,7 @@
 #include <QVBoxLayout>
 
 #include "BeltSystem.h"
+#include "TickAdvancedEvent.h"
 #include "Building.h"
 #include "BuildingSystem.h"
 #include "BuildingType.h"
@@ -69,10 +70,10 @@ QString rotationLabel(Rotation r)
 {
     switch (r)
     {
-        case Rotation::North: return "North (↑)";
+        case Rotation::North: return QObject::tr("North (↑)");
-        case Rotation::East:  return "East (→)";
+        case Rotation::East:  return QObject::tr("East (→)");
-        case Rotation::South: return "South (↓)";
+        case Rotation::South: return QObject::tr("South (↓)");
-        case Rotation::West:  return "West (←)";
+        case Rotation::West:  return QObject::tr("West (←)");
     }
     return "";
 }
@@ -96,13 +97,13 @@ SelectedBuildingPanel::SelectedBuildingPanel(Simulation* sim,
 
     m_titleLabel   = new QLabel(this);
     m_recipeCombo  = new QComboBox(this);
-    m_clearBeltBtn = new QPushButton("Clear Items", this);
+    m_clearBeltBtn = new QPushButton(tr("Clear Items"), this);
     m_filterALabel = new QLabel(this);
     m_filterAList  = new QListWidget(this);
     m_filterBLabel = new QLabel(this);
     m_filterBList  = new QListWidget(this);
     m_layoutPreview      = new ShipLayoutPreview(this);
-    m_configureLayoutBtn = new QPushButton("Configure Layout", this);
+    m_configureLayoutBtn = new QPushButton(tr("Configure Layout"), this);
     m_buffersLabel = new QLabel(this);
     m_buffersLabel->setWordWrap(true);
 
@@ -136,6 +137,13 @@ SelectedBuildingPanel::SelectedBuildingPanel(Simulation* sim,
             this, &SelectedBuildingPanel::onSplitterFilterChanged);
 
     buildEmpty();
+
+    registerForEvent();
+}
+
+SelectedBuildingPanel::~SelectedBuildingPanel()
+{
+    unregisterForEvent();
 }
 
 void SelectedBuildingPanel::onSelectionChanged(const std::vector<BuildingId>& ids)
@@ -192,7 +200,7 @@ void SelectedBuildingPanel::buildSingle(BuildingId id)
         QString progress;
         if (s->completesAt == 0)
         {
-            progress = "Queued";
+            progress = tr("Queued");
         }
         else
         {
@@ -207,15 +215,15 @@ void SelectedBuildingPanel::buildSingle(BuildingId id)
                 const Tick elapsed  = m_sim->currentTick() - (s->completesAt - duration);
                 const int pct = static_cast<int>(
                     std::max(Tick(0), std::min(duration, elapsed)) * 100 / duration);
-                progress = QString::number(pct) + "% complete";
+                progress = tr("%1% complete").arg(pct);
             }
             else
             {
-                progress = "Building...";
+                progress = tr("Building...");
             }
         }
 
-        m_titleLabel->setText("(Building) " + buildingTypeName(s->type));
+        m_titleLabel->setText(tr("(Building) %1").arg(buildingTypeName(s->type)));
         m_titleLabel->show();
         m_buffersLabel->setText(progress);
         m_buffersLabel->show();
@@ -231,7 +239,7 @@ void SelectedBuildingPanel::buildSingle(BuildingId id)
         m_recipeCombo->blockSignals(true);
         m_recipeCombo->clear();
 
-        m_recipeCombo->addItem("(none)", QString());
+        m_recipeCombo->addItem(tr("(none)"), QString());
 
         if (b->type == BuildingType::Shipyard)
         {
@@ -333,7 +341,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
 
     if (!b->inputBuffer.counts.empty())
     {
-        bufText += "Input: ";
+        bufText += tr("Input: ");
         for (const std::pair<const ItemType, int>& entry : b->inputBuffer.counts)
         {
             int perCycle = 0;
@@ -389,7 +397,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
         {
             outCounts[item.type.id]++;
         }
-        bufText += "Output: ";
+        bufText += tr("Output: ");
         for (const RecipeOutput& out : recipe->outputs)
         {
             const std::map<std::string, int>::const_iterator it =
@@ -407,7 +415,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
         {
             outCounts[item.type.id]++;
         }
-        bufText += "Output: ";
+        bufText += tr("Output: ");
         for (const std::pair<const std::string, int>& entry : outCounts)
         {
             bufText += QString::fromStdString(entry.first)
@@ -436,7 +444,7 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
             }
         }
 
-        bufText += QString("Cycle: %1 s\n").arg(durationSeconds, 0, 'f', 1);
+        bufText += tr("Cycle: %1 s\n").arg(durationSeconds, 0, 'f', 1);
 
         if (b->production.has_value())
         {
@@ -446,11 +454,11 @@ void SelectedBuildingPanel::refreshBuffers(const Building* b)
             const Tick elapsed     = currentTick - (completesAt - cycleTicks);
             const int  pct         = static_cast<int>(
                 std::max(Tick(0), std::min(cycleTicks, elapsed)) * 100 / cycleTicks);
-            bufText += QString("Progress: %1%\n").arg(pct);
+            bufText += tr("Progress: %1%\n").arg(pct);
         }
         else
         {
-            bufText += "Progress: idle\n";
+            bufText += tr("Progress: idle\n");
         }
     }
 
@@ -488,7 +496,7 @@ const ShipDef* SelectedBuildingPanel::findShipDef(const std::string& id) const
     return nullptr;
 }
 
-void SelectedBuildingPanel::onStateUpdated(Tick /*tick*/, int /*blocks*/, double /*speed*/)
+void SelectedBuildingPanel::handleEvent(std::shared_ptr<const TickAdvancedEvent> /*event*/)
 {
     if (m_singleBuildingId == kInvalidBuildingId) { return; }
     const Building* b = m_sim->buildings().findBuilding(m_singleBuildingId);
@@ -496,7 +504,7 @@ void SelectedBuildingPanel::onStateUpdated(Tick /*tick*/, int /*blocks*/, double
     {
         // If the panel was last showing this id as a construction site, the
         // full building UI (recipe combo, ports, etc.) hasn't been built yet.
-        if (m_titleLabel->text().startsWith("(Building) "))
+        if (m_titleLabel->text().startsWith(tr("(Building) ")))
         {
             rebuild();
         }
@@ -592,7 +600,7 @@ void SelectedBuildingPanel::buildSplitterFilters(QPoint splitterTile)
                             const QString& dirLabel,
                             const std::vector<ItemType>& filter)
     {
-        label->setText(dirLabel + " filter (empty = all):");
+        label->setText(tr("%1 filter (empty = all):").arg(dirLabel));
         list->blockSignals(true);
         list->clear();
         for (const std::string& itemId : items)

src/ui/SelectedBuildingPanel.h

@@ -8,11 +8,13 @@
 
 #include "Building.h"
 #include "BuildingId.h"
+#include "EventHandler.h"
 #include "GameConfig.h"
 #include "RecipesConfig.h"
 #include "ShipLayout.h"
 #include "ShipsConfig.h"
 #include "Tick.h"
+#include "TickAdvancedEvent.h"
 
 class Simulation;
 class ShipLayoutPreview;
@@ -22,20 +24,24 @@ class QListWidget;
 class QPushButton;
 class QVBoxLayout;
 
-class SelectedBuildingPanel : public QWidget
+class SelectedBuildingPanel : public QWidget,
+                               public EventHandler<TickAdvancedEvent>
 {
     Q_OBJECT
 
 public:
     SelectedBuildingPanel(Simulation* sim, const GameConfig* config,
                           QWidget* parent = nullptr);
+    ~SelectedBuildingPanel() override;
 
 signals:
     void layoutDialogRequested(BuildingId shipyardId);
 
 public slots:
     void onSelectionChanged(const std::vector<BuildingId>& ids);
-    void onStateUpdated(Tick tick, int blocks, double speed);
+
+private:
+    void handleEvent(std::shared_ptr<const TickAdvancedEvent> event) override;
 
 private slots:
     void onRecipeChanged(int comboIndex);

src/ui/ShipLayoutDialog.cpp

@@ -289,7 +289,7 @@ public:
         layout->setContentsMargins(4, 4, 4, 4);
         layout->setSpacing(4);
 
-        QPushButton* createBtn = new QPushButton("Create Blueprint", this);
+        QPushButton* createBtn = new QPushButton(tr("Create Blueprint"), this);
         createBtn->setFixedHeight(36);
         layout->addWidget(createBtn);
 
@@ -308,7 +308,7 @@ public:
         connect(createBtn, &QPushButton::clicked, this, [this]() {
             bool ok = false;
             const QString name = QInputDialog::getText(
-                this, "Create Blueprint", "Blueprint name:",
+                this, tr("Create Blueprint"), tr("Blueprint name:"),
                 QLineEdit::Normal, QString(), &ok);
             if (!ok || name.trimmed().isEmpty()) { return; }
 
@@ -398,7 +398,7 @@ ShipLayoutDialog::ShipLayoutDialog(const GameConfig* config,
     , m_removeButton(nullptr)
     , m_gridWidget(nullptr)
 {
-    setWindowTitle("Configure Ship Layout");
+    setWindowTitle(tr("Configure Ship Layout"));
     setModal(true);
 
     // Find the ship's layout grid.
@@ -482,7 +482,7 @@ ShipLayoutDialog::ShipLayoutDialog(const GameConfig* config,
             this, &ShipLayoutDialog::onModuleButtonClicked);
 
     // Remove button.
-    m_removeButton = new QPushButton("Remove", this);
+    m_removeButton = new QPushButton(tr("Remove"), this);
     m_removeButton->setCheckable(true);
     m_removeButton->setFixedHeight(48);
     if (col > 0)
@@ -513,8 +513,8 @@ ShipLayoutDialog::ShipLayoutDialog(const GameConfig* config,
 
     // Confirm / Cancel buttons.
     QHBoxLayout* bottomBar = new QHBoxLayout();
-    QPushButton* confirmBtn = new QPushButton("Confirm", this);
+    QPushButton* confirmBtn = new QPushButton(tr("Confirm"), this);
-    QPushButton* cancelBtn = new QPushButton("Cancel", this);
+    QPushButton* cancelBtn = new QPushButton(tr("Cancel"), this);
     bottomBar->addWidget(confirmBtn);
     bottomBar->addWidget(cancelBtn);
     rightLayout->addLayout(bottomBar);