Add external model object

[Dgzt]

A added two methods:

• addGameObject(ModelInstance, Vector3)
• addGameObject(Model, Vector3)

into SceneGraph.

There methods can add external model object into the scene graph.

Peek.2022-10-23.09-09.mp4

Test code:

        private Mundus mundus;
	private Scene scene;
	private FirstPersonCameraController controller;
	
	@Override
	public void create () {
		mundus = new Mundus(Gdx.files.internal("mundus"));
		mundus.getAssetManager().getGdxAssetManager().load("uploads_files_2305968.gltf", SceneAsset.class);
		mundus.getAssetManager().getGdxAssetManager().finishLoading();
		SceneAsset sceneAsset = mundus.getAssetManager().getGdxAssetManager().get("uploads_files_2305968.gltf");
		mundus.getAssetManager().maxNumBones = 30;

		scene = mundus.loadScene("Main Scene.mundus");

		scene.cam.position.set(10, 10, 10);
		scene.cam.direction.rotate(Vector3.Y, 70);
		scene.cam.direction.rotate(Vector3.Z, -20);

		scene.sceneGraph.addGameObject( new ModelInstance(sceneAsset.scene.model), new Vector3(10, 2, 10));

		controller = new FirstPersonCameraController(scene.cam);
		controller.setVelocity(200f);
		Gdx.input.setInputProcessor(controller);
	}

	@Override
	public void render () {
		ScreenUtils.clear(1, 0, 0, 1);

		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);

		controller.update();
		scene.sceneGraph.update();
		scene.render();

		if (Gdx.input.isKeyJustPressed(Input.Keys.F)) {
			SceneAsset sceneAsset = mundus.getAssetManager().getGdxAssetManager().get("uploads_files_2305968.gltf");
			scene.sceneGraph.addGameObject(sceneAsset.scene.model, new Vector3(MathUtils.random(100), 2, MathUtils.random(100)));
		}
	}

If the map has not any model, we should set manually the maxNumBones.

[Dgzt]

Currently these methods want Vector3, but later a Vector2 should be useful what add the model to the terrain.

[JamesTKhan]

Tested it out, looks good,