Libgdx中有个类Actions, 从它开始顺藤摸瓜就能把哪些简单的Action快速掌握
见代码：
1 public class ActionTestScreen implements Screen,InputProcessor{ 2 private Stage stage; 3 private Texture texture; 4 private Image img; 5 6 @Override 7 public void render(float delta) { 8 Gdx.gl.glClearColor(1, 0, 0, 1); 9 Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT); 10 stage.act(); 11 stage.draw(); 12 } 13 14 @Override 15 public void show() { 16 Gdx.input.setInputProcessor(this);//容易遗忘 17 stage = new Stage(); 18 texture = new Texture("badlogic.jpg"); 19 img = new Image(texture); 20 //img.setCenterPosition(img.getWidth()/2,img.getHeight()/2);//重要 21 img.setOrigin(img.getCenterX(),img.getCenterY());//重要！ 22 stage.addActor(img); 23 System.out.println(img.getX()+","+img.getY()); 24 } 25 26 @Override 27 public boolean keyDown(int keycode) { 28 switch (keycode){ 29 case Input.Keys.NUM_1:{ 30 MoveByAction moveBy = Actions.moveBy(100,100,0.5f); 31 img.addAction(moveBy); 32 return true; 33 } 34 case Input.Keys.NUM_2:{ 35 MoveToAction moveTo = Actions.moveTo(200, 200, 0.5f); 36 img.addAction(moveTo); 37 return true; 38 } 39 case Input.Keys.NUM_3:{ 40 RotateByAction rotateBy = Actions.rotateBy(90,0.5f); 41 img.addAction(rotateBy); 42 return true; 43 } 44 case Input.Keys.NUM_4:{ 45 RotateToAction rotateTo = Actions.rotateTo(90, 0.5f); 46 img.addAction(rotateTo); 47 return true; 48 } 49 case Input.Keys.NUM_5:{ 50 ScaleByAction scaleBy = Actions.scaleBy(0.5f,0.5f,0.5f); 51 img.addAction(scaleBy); 52 return true; 53 } 54 case Input.Keys.NUM_6:{ 55 ScaleToAction scaleTo = Actions.scaleTo(0.5f,0.5f,0.5f); 56 img.addAction(scaleTo); 57 return true; 58 } 59 case Input.Keys.NUM_7:{//顺序执行 60 img.setCenterPosition(0,0); 61 img.setScale(1,1); 62 63 MoveToAction m2 = Actions.moveTo(200,200,0.5f); 64 RotateByAction r1 = Actions.rotateBy(360,0.5f); 65 ScaleToAction s1 = Actions.scaleTo(0.5f,0.5f,0.5f); 66 SequenceAction s = Actions.sequence(m2,r1,s1); 67 img.addAction(s); 68 return true; 69 } 70 case Input.Keys.NUM_8:{//同时执行 71 img.setCenterPosition(0,0); 72 img.setScale(1,1); 73 74 MoveToAction m2 = Actions.moveTo(200,200,0.5f); 75 RotateByAction r1 = Actions.rotateBy(360,0.5f); 76 ScaleToAction s1 = Actions.scaleTo(0.5f,0.5f,0.5f); 77 ParallelAction s = Actions.parallel(m2,r1,s1); 78 img.addAction(s); 79 return true; 80 } 81 case Input.Keys.A:{//同时执行 82 AlphaAction a1 = Actions.alpha(0.5f,0.5f); 83 84 img.addAction(a1); 85 return true; 86 } 87 ...... 88 89 90 } 91 return false; 92 } 93 ......
还有一些Action没有列出，用的时候再仔细研究吧，有的我也没搞懂呢
另：Actor貌似没有像2dx那种锚点概念，setPosition总是以左下角为基准？？