Add freeze_in_void property to PhysicsEntity

Core/include/Core/PhysicsEntity.hpp

@@ -19,6 +19,7 @@ namespace CaveGame::Core
 {
     class PhysicsEntity : public Entity {
     public:
+        bool freeze_in_void = true;
         explicit PhysicsEntity(const Vector2& spawnPoint);
 
         [[nodiscard]] Vector2 Velocity() const;
@@ -45,7 +46,18 @@ namespace CaveGame::Core
 
                     TileID id = map->GetTile(tileBoxPos.x, tileBoxPos.y);
 
-                    if (id == TileID::VOID || id == TileID::AIR)
+                    if (id == TileID::VOID) {
+                        if (freeze_in_void)
+                        {
+                            velocity = {0,0};
+                            next_position = position;
+                            return;
+                        }
+                        continue;
+                    }
+
+
+                    if (id == TileID::AIR)
                         continue;
 
                     coll_tests++;
@@ -117,6 +129,11 @@ namespace CaveGame::Core
 
         void Update(float elapsed) override {
 
+            if (!on_ground)
+                airtime += elapsed;
+            else
+                airtime = 0;
+
             // TODO: Sophisticated mechanism to maintain locked-timestep, multiple-iteration physics steps.
             PhysicsUpdate(elapsed);