Enforce Entities exist on only one object layer at the same time

api/src/main/java/com/bartlomiejpluta/base/api/entity/Entity.java

@@ -22,6 +22,8 @@ public interface Entity extends Movable, Renderable, Updatable {
 
    Direction getDirectionTowards(Entity target);
 
+   ObjectLayer getLayer();
+
    void onAdd(ObjectLayer layer);
 
    void onRemove(ObjectLayer layer);

api/src/main/java/com/bartlomiejpluta/base/api/move/Movable.java

@@ -32,4 +32,6 @@ public interface Movable extends Placeable {
    int manhattanDistance(Vector2ic coordinates);
 
    boolean move(Movement movement);
+
+   void abortMove();
 }

api/src/main/java/com/bartlomiejpluta/base/api/move/Movement.java

@@ -26,6 +26,10 @@ public final class Movement {
       return object.move(this);
    }
 
+   public void abort() {
+      object.abortMove();
+   }
+
    public Movement another() {
       return object.prepareMovement(direction);
    }

api/src/main/java/com/bartlomiejpluta/base/lib/animation/AnimationDelegate.java

@@ -200,6 +200,11 @@ public abstract class AnimationDelegate implements Animation {
       return animation.move(movement);
    }
 
+   @Override
+   public void abortMove() {
+      animation.abortMove();
+   }
+
    @Override
    public void onAdd(Layer layer) {
       animation.onAdd(layer);

api/src/main/java/com/bartlomiejpluta/base/lib/entity/EntityDelegate.java

@@ -194,6 +194,11 @@ public abstract class EntityDelegate implements Entity {
       return entity.getModelMatrix();
    }
 
+   @Override
+   public ObjectLayer getLayer() {
+      return entity.getLayer();
+   }
+
    @Override
    public void onAdd(ObjectLayer layer) {
       entity.onAdd(layer);
@@ -234,6 +239,11 @@ public abstract class EntityDelegate implements Entity {
       return entity.move(movement);
    }
 
+   @Override
+   public void abortMove() {
+      entity.abortMove();
+   }
+
    @Override
    public void update(float dt) {
       entity.update(dt);