implement ui

src/lib/sim/Simulation.h

@@ -6,11 +6,15 @@
 #include <string>
 #include <vector>
 
+#include <QPoint>
+
 #include "BeltSystem.h"
 #include "BlueprintDropEvent.h"
+#include "BuildingType.h"
 #include "EntityId.h"
 #include "FireEvent.h"
 #include "GameConfig.h"
+#include "Rotation.h"
 #include "Tick.h"
 
 class BuildingSystem;
@@ -44,6 +48,10 @@ public:
     int  blueprintLevel(const std::string& shipId)    const;
     bool isBlueprintUnlocked(const std::string& shipId) const;
 
+    // Checks affordability, deducts building blocks, and places the building.
+    // Returns the new entity id, or kInvalidEntityId if blocks are insufficient.
+    EntityId tryPlaceBuilding(BuildingType type, QPoint anchor, Rotation rotation);
+
     BuildingSystem&       buildings();
     const BuildingSystem& buildings() const;
     BeltSystem&           belts();