make ships orbit their targets

src/lib/ecs/system/ai/AttackExecutor.cpp

@@ -5,6 +5,7 @@
 #include "EntityAdmin.h"
 #include "ModuleOwnerComponent.h"
 #include "MovementIntentComponent.h"
+#include "OrbitMath.h"
 #include "PositionComponent.h"
 #include "SelectedBehaviorComponent.h"
 #include "tracing.h"
@@ -28,7 +29,9 @@ void AttackExecutor::execute(EntityAdmin& admin)
             QVector2D dest = pos.value;
             if (admin.isValid(t) && admin.hasAll<PositionComponent>(t))
             {
-                dest = admin.get<PositionComponent>(t).value;
+                const QVector2D targetPos = admin.get<PositionComponent>(t).value;
+                dest = OrbitMath::computeOrbitDestination(pos.value, targetPos,
+                                                          attack.orbitRadius_tiles);
             }
             intent = MovementIntentComponent{true, dest};
         });