minor box2d addition

core/src/main/java/io/github/com/quillraven/component/Physic.java

@@ -0,0 +1,13 @@
+package io.github.com.quillraven.component;
+
+import com.badlogic.ashley.core.Component;
+import com.badlogic.ashley.core.ComponentMapper;
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.physics.box2d.Body;
+
+public record Physic(
+    Body body,
+    Vector2 prevPosition
+) implements Component {
+    public static final ComponentMapper<Physic> MAPPER = ComponentMapper.getFor(Physic.class);
+}

core/src/main/java/io/github/com/quillraven/screen/GameScreen.java

@@ -4,6 +4,8 @@ import com.badlogic.ashley.core.Engine;
 import com.badlogic.ashley.core.EntitySystem;
 import com.badlogic.gdx.ScreenAdapter;
 import com.badlogic.gdx.maps.tiled.TiledMap;
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.physics.box2d.World;
 import com.badlogic.gdx.utils.Disposable;
 import io.github.com.quillraven.GdxGame;
 import io.github.com.quillraven.asset.MapAsset;
@@ -18,11 +20,14 @@ public class GameScreen extends ScreenAdapter {
     private final TiledService tiledService;
     private final Engine engine;
     private final TiledAshleySpawner tiledAshleySpawner;
+    private final World physicWorld;
 
     public GameScreen(GdxGame game) {
         this.tiledService = new TiledService(game.getAssetService());
+        this.physicWorld = new World(Vector2.Zero, true);
+        this.physicWorld.setAutoClearForces(false);
         this.engine = new Engine();
-        this.tiledAshleySpawner = new TiledAshleySpawner(this.engine);
+        this.tiledAshleySpawner = new TiledAshleySpawner(this.engine, this.physicWorld);
 
         // add ECS systems
         this.engine.addSystem(new RenderSystem(game.getBatch(), game.getViewport(), game.getCamera()));
@@ -53,5 +58,6 @@ public class GameScreen extends ScreenAdapter {
                 disposable.dispose();
             }
         }
+        this.physicWorld.dispose();
     }
 }

core/src/main/java/io/github/com/quillraven/tiled/TiledAshleySpawner.java

@@ -6,20 +6,27 @@ import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 import com.badlogic.gdx.maps.MapLayer;
 import com.badlogic.gdx.maps.MapObject;
+import com.badlogic.gdx.maps.MapObjects;
 import com.badlogic.gdx.maps.tiled.TiledMap;
 import com.badlogic.gdx.maps.tiled.TiledMapTileLayer;
 import com.badlogic.gdx.maps.tiled.objects.TiledMapTileMapObject;
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.physics.box2d.Body;
+import com.badlogic.gdx.physics.box2d.BodyDef;
+import com.badlogic.gdx.physics.box2d.World;
 import com.badlogic.gdx.utils.GdxRuntimeException;
 import io.github.com.quillraven.GdxGame;
 import io.github.com.quillraven.component.Graphic;
+import io.github.com.quillraven.component.Physic;
 import io.github.com.quillraven.component.Transform;
 
 public class TiledAshleySpawner {
     private final Engine engine;
+    private final World physicWorld;
 
-    public TiledAshleySpawner(Engine engine) {
+    public TiledAshleySpawner(Engine engine, World physicWorld) {
         this.engine = engine;
+        this.physicWorld = physicWorld;
     }
 
     public void loadMapObjects(TiledMap tiledMap) {
@@ -49,11 +56,28 @@ public class TiledAshleySpawner {
         Entity entity = this.engine.createEntity();
 
         addEntityTransform(tileMapObject, entity);
+        addEntityPhysic(tileMapObject.getTile().getObjects(), entity);
         entity.add(new Graphic(tileMapObject.getTile().getTextureRegion(), Color.WHITE.cpy()));
 
         this.engine.addEntity(entity);
     }
 
+    private void addEntityPhysic(MapObjects objects, Entity entity) {
+        if (objects.getCount() == 0) return;
+
+        BodyDef bodyDef = new BodyDef();
+        bodyDef.type = BodyDef.BodyType.DynamicBody;
+        bodyDef.position.set(entity.getComponent(Transform.class).position());
+        bodyDef.fixedRotation = true;
+
+        Body body = this.physicWorld.createBody(bodyDef);
+        for (MapObject object : objects) {
+
+        }
+
+        entity.add(new Physic(body, new Vector2(body.getPosition())));
+    }
+
     private static void addEntityTransform(TiledMapTileMapObject tileMapObject, Entity entity) {
         Vector2 position = new Vector2(tileMapObject.getX(), tileMapObject.getY());
         TextureRegion textureRegion = tileMapObject.getTile().getTextureRegion();

core/src/main/java/io/github/com/quillraven/tiled/TiledPhysics.java

@@ -0,0 +1,6 @@
+package io.github.com.quillraven.tiled;
+
+import com.badlogic.gdx.physics.box2d.World;
+
+public final class TiledPhysics {
+}