allow to configure when which schematic gets unlockable

src/lib/config/ConfigLoader.cpp

@@ -403,7 +403,7 @@ ShipsConfig ConfigLoader::loadShips(const std::string& path)
 
         ShipDef def;
         def.id                 = requireString(mt["id"],                 file, elemPath + ".id");
-        def.availableFromStart = requireBool(mt["available_from_start"], file, elemPath + ".available_from_start");
+        def.unlockAtStationLevel = static_cast<int>(requireInt(mt["unlock_at_station_level"], file, elemPath + ".unlock_at_station_level"));
         def.layout             = requireStringArray(mt["layout"],       file, elemPath + ".layout");
 
         // Schematic

src/lib/config/ShipsConfig.h

@@ -51,7 +51,7 @@ struct ShipLoot
 struct ShipDef
 {
     std::string id;
-    bool availableFromStart;
+    int unlockAtStationLevel;
     std::vector<std::string> layout;
 
     ShipSchematic schematic;

src/lib/sim/Simulation.cpp

@@ -66,8 +66,8 @@ Simulation::Simulation(GameConfig config, unsigned int seed)
     for (const ShipDef& def : m_config.ships.ships)
     {
         SchematicState state;
-        state.unlocked = def.availableFromStart;
-        state.level    = def.availableFromStart ? def.schematic.playerProductionLevel : 0;
+        state.unlocked = (def.unlockAtStationLevel == -1);
+        state.level    = (def.unlockAtStationLevel == -1) ? def.schematic.playerProductionLevel : 0;
         m_schematicLevels[def.id] = state;
     }
 
@@ -139,8 +139,8 @@ void Simulation::reset(unsigned int seed)
     for (const ShipDef& def : m_config.ships.ships)
     {
         SchematicState state;
-        state.unlocked = def.availableFromStart;
-        state.level    = def.availableFromStart ? def.schematic.playerProductionLevel : 0;
+        state.unlocked = (def.unlockAtStationLevel == -1);
+        state.level    = (def.unlockAtStationLevel == -1) ? def.schematic.playerProductionLevel : 0;
         m_schematicLevels[def.id] = state;
     }
 
@@ -473,19 +473,23 @@ void Simulation::tickDeathsAndLoot()
     if (es0Gone && es1Gone &&
         m_currentEnemyStationEntities[0] != entt::null)
     {
+        const int destroyedLevel = m_waveSystem->generation();
         m_waveSystem->onEnemyStationsDestroyed();
         placeEnemyStationSet(m_waveSystem->generation());
-        awardSchematicDrop();
+        awardSchematicDrop(destroyedLevel);
     }
 }
 
-void Simulation::awardSchematicDrop()
+void Simulation::awardSchematicDrop(int destroyedStationLevel)
 {
     std::vector<std::string> ids;
     ids.reserve(m_config.ships.ships.size());
     for (const ShipDef& def : m_config.ships.ships)
     {
-        ids.push_back(def.id);
+        if (def.unlockAtStationLevel == -1 || def.unlockAtStationLevel <= destroyedStationLevel)
+        {
+            ids.push_back(def.id);
+        }
     }
 
     std::uniform_int_distribution<int> dist(0, static_cast<int>(ids.size()) - 1);

src/lib/sim/Simulation.h

@@ -100,7 +100,7 @@ private:
     void tickDeathsAndLoot();
 
     // Award a random schematic drop (REQ-DEF-SCHEMATIC-DROP) and emit the event.
-    void awardSchematicDrop();
+    void awardSchematicDrop(int destroyedStationLevel);
 
     GameConfig m_config;
     std::mt19937 m_rng;