implement scrap and ship skeleton

src/lib/sim/Simulation.cpp

@@ -1,6 +1,8 @@
 #include "Simulation.h"
 
 #include "BuildingSystem.h"
+#include "ScrapSystem.h"
+#include "ShipSystem.h"
 
 Simulation::Simulation(const GameConfig& config, unsigned int seed)
     : m_config(config)
@@ -16,6 +18,8 @@ Simulation::Simulation(const GameConfig& config, unsigned int seed)
         [this]() { return allocateId(); },
         [this](int amount) { m_buildingBlocksStock += amount; },
         m_rng);
+    m_shipSystem  = std::make_unique<ShipSystem>(config, [this]() { return allocateId(); });
+    m_scrapSystem = std::make_unique<ScrapSystem>([this]() { return allocateId(); });
 }
 
 Simulation::~Simulation() = default;
@@ -27,6 +31,7 @@ void Simulation::tick()
     m_buildingSystem->tickProduction(m_currentTick);  // step 4
     m_buildingSystem->tickBeltPush();       // step 5
     m_beltSystem.tick();                    // step 6
+    m_scrapSystem->tickDespawn(m_currentTick);  // step 11
 
     ++m_currentTick;
 }
@@ -75,6 +80,26 @@ const BeltSystem& Simulation::belts() const
     return m_beltSystem;
 }
 
+ShipSystem& Simulation::ships()
+{
+    return *m_shipSystem;
+}
+
+const ShipSystem& Simulation::ships() const
+{
+    return *m_shipSystem;
+}
+
+ScrapSystem& Simulation::scraps()
+{
+    return *m_scrapSystem;
+}
+
+const ScrapSystem& Simulation::scraps() const
+{
+    return *m_scrapSystem;
+}
+
 EntityId Simulation::allocateId()
 {
     return m_nextId++;