libgdx Actor

直接上代码吧

 1 package com.mygdx.game;
 2 
 3 import com.badlogic.gdx.Gdx;
 4 import com.badlogic.gdx.graphics.g2d.Animation;
 5 import com.badlogic.gdx.graphics.g2d.Batch;
 6 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 7 import com.badlogic.gdx.scenes.scene2d.Actor;
 8 import com.badlogic.gdx.scenes.scene2d.InputEvent;
 9 import com.badlogic.gdx.scenes.scene2d.InputListener;
10 
11 /**
12  * Created by HanHongmin on 14-7-20.
13  */
14 public class Plane extends Actor {
15     private Animation animation;
16     private float stateTime;
17 
18     public Plane(Animation animation){
19         this.animation = animation;
20         setBounds(getX(), getY(), animation.getKeyFrames()[0].getRegionWidth(), animation.getKeyFrames()[0].getRegionHeight());
21 
22         this.addListener(new InputListener(){
23             public boolean touchDown(InputEvent event, float x, float y, int pointer, int buttons){
24                 System.out.println("Touched" + getName());
25                 return true;
26             }
27         });
28     }
29 
30     public void draw(Batch batch, float alpha){
31         stateTime = stateTime+Gdx.graphics.getDeltaTime();
32 
33         TextureRegion toDraw = animation.getKeyFrame(stateTime);
34 
35         batch.draw(toDraw, getX(), getY(), getOriginX(), getOriginY(), getWidth(), getHeight(),
36                 getScaleX(), getScaleY(), getRotation());
37     }
38 
39 
40 }
 1 package com.mygdx.game;
 2 
 3 import com.badlogic.gdx.ApplicationListener;
 4 import com.badlogic.gdx.Gdx;
 5 import com.badlogic.gdx.Input;
 6 import com.badlogic.gdx.graphics.GL20;
 7 import com.badlogic.gdx.graphics.Texture;
 8 import com.badlogic.gdx.graphics.g2d.Animation;
 9 import com.badlogic.gdx.graphics.g2d.TextureRegion;
10 import com.badlogic.gdx.scenes.scene2d.*;
11 import com.badlogic.gdx.utils.Array;
12 
13 public class MyGdxGame implements ApplicationListener {
14     private Plane plane;
15     private Stage stage;
16     private Texture t1;
17     private Texture t2;
18     private Texture t3;
19 
20     private float moveSpeed = 200;
21 
22     @Override
23     public void create() {
24         stage = new Stage();
25 
26         t1 = new Texture("plane1.png");
27         t2 = new Texture("plane2.png");
28         t3 = new Texture("plane3.png");
29         Array<TextureRegion> frames = new Array(4);
30         frames.add(new TextureRegion(t1));
31         frames.add(new TextureRegion(t2));
32         frames.add(new TextureRegion(t3));
33         frames.add(new TextureRegion(t2));
34 
35         Animation animation = new Animation(0.05f,frames, Animation.PlayMode.LOOP);
36 
37         plane = new Plane(animation);
38 
39         plane.setCenterPosition(Gdx.graphics.getWidth()/2,Gdx.graphics.getHeight()/2);
40         plane.setName("飞机1");
41 
42         stage.addActor(plane);
43 
44         Gdx.input.setInputProcessor(stage);
45     }
46 
47     @Override
48     public void dispose() {
49         t1.dispose();
50         t2.dispose();
51         t3.dispose();
52         stage.dispose();
53     }
54 
55     @Override
56     public void render () {
57         Gdx.gl.glClearColor(0, 0, 0, 1);
58         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
59         float time = Gdx.graphics.getDeltaTime();
60         if(Gdx.input.isKeyPressed(Input.Keys.W)){
61             plane.setY(plane.getY()+moveSpeed*time);
62         }
63         if(Gdx.input.isKeyPressed(Input.Keys.A)){
64             if(plane.getScaleX()==1){
65                 plane.setScaleX(-1);
66                 plane.setX(plane.getX()+plane.getWidth());
67             }
68 
69             plane.setX(plane.getX()-moveSpeed*time);
70         }
71         if(Gdx.input.isKeyPressed(Input.Keys.S)){
72             plane.setY(plane.getY()-moveSpeed*time);
73         }
74         if(Gdx.input.isKeyPressed(Input.Keys.D)){
75             if(plane.getScaleX()==-1){
76                 plane.setScaleX(1);
77                 plane.setX(plane.getX()-plane.getWidth());
78             }
79 
80             plane.setX(plane.getX()+moveSpeed*time);
81         }
82 
83         stage.act(Gdx.graphics.getDeltaTime());
84         stage.draw();
85     }
86 
87     @Override
88     public void resize(int width, int height) {
89     }
90 
91     @Override
92     public void pause() {
93     }
94 
95     @Override
96     public void resume() {
97     }
98 }

三张图片资源如下：

//==============add 2014-07-22

代码控制图片翻转的地方总觉得不妥，用的方法不对。

2dx里面有个锚点可以控制，翻转旋转都是以锚点为基点的，libgdx里面要手动控制吗？怎么想怎么不对。

看看源码发现有个Origin属性，测试看看。

plane.setOrigin(plane.getWidth()/2,plane.getHeight()/2);

没有问题~·

最后加上了描框，方便测试以及调试碰撞检测等~~

全代码如下：

  1 package com.mygdx.game;
  2 
  3 import com.badlogic.gdx.ApplicationListener;
  4 import com.badlogic.gdx.Gdx;
  5 import com.badlogic.gdx.Input;
  6 import com.badlogic.gdx.graphics.Color;
  7 import com.badlogic.gdx.graphics.GL20;
  8 import com.badlogic.gdx.graphics.Texture;
  9 import com.badlogic.gdx.graphics.g2d.Animation;
 10 import com.badlogic.gdx.graphics.g2d.TextureRegion;
 11 import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 12 import com.badlogic.gdx.math.Rectangle;
 13 import com.badlogic.gdx.scenes.scene2d.*;
 14 import com.badlogic.gdx.utils.Array;
 15 
 16 public class MyGdxGame implements ApplicationListener {
 17     private Plane plane;
 18     private Stage stage;
 19     private Texture t1;
 20     private Texture t2;
 21     private Texture t3;
 22 
 23     private float moveSpeed = 200;
 24     ShapeRenderer debugRenderer;
 25 
 26     @Override
 27     public void create() {
 28         stage = new Stage();
 29 
 30         t1 = new Texture("plane1.png");
 31         t2 = new Texture("plane2.png");
 32         t3 = new Texture("plane3.png");
 33         Array<TextureRegion> frames = new Array(4);
 34         frames.add(new TextureRegion(t1));
 35         frames.add(new TextureRegion(t2));
 36         frames.add(new TextureRegion(t3));
 37         frames.add(new TextureRegion(t2));
 38 
 39         Animation animation = new Animation(0.05f,frames, Animation.PlayMode.LOOP);
 40 
 41         plane = new Plane(animation);
 42 
 43         plane.setCenterPosition(Gdx.graphics.getWidth()/2,Gdx.graphics.getHeight()/2);
 44         //plane.setPosition(Gdx.graphics.getWidth()/2,Gdx.graphics.getHeight()/2);
 45         plane.setOrigin(plane.getWidth()/2,plane.getHeight()/2);
 46         plane.setName("飞机1");
 47 
 48         stage.addActor(plane);
 49 
 50         Gdx.input.setInputProcessor(stage);
 51 
 52         debugRenderer = new ShapeRenderer();
 53 
 54         debugRenderer.setProjectionMatrix(stage.getCamera().combined);
 55     }
 56 
 57     @Override
 58     public void dispose() {
 59         t1.dispose();
 60         t2.dispose();
 61         t3.dispose();
 62         stage.dispose();
 63     }
 64 
 65     @Override
 66     public void render () {
 67         Gdx.gl.glClearColor(0, 0, 0, 1);
 68         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
 69         float time = Gdx.graphics.getDeltaTime();
 70         if(Gdx.input.isKeyPressed(Input.Keys.W)){
 71             plane.setY(plane.getY()+moveSpeed*time);
 72         }
 73         if(Gdx.input.isKeyPressed(Input.Keys.A)){
 74             //System.out.println(plane.getRotation());
 75             if(plane.getScaleX()==1){
 76                 plane.setScaleX(-1);
 77                 //plane.setX(plane.getX()+plane.getWidth());
 78             }
 79             //plane.setRotation(plane.getRotation()+1);
 80             plane.setX(plane.getX()-moveSpeed*time);
 81         }
 82         if(Gdx.input.isKeyPressed(Input.Keys.S)){
 83             plane.setY(plane.getY()-moveSpeed*time);
 84         }
 85         if(Gdx.input.isKeyPressed(Input.Keys.D)){
 86             if(plane.getScaleX()==-1){
 87                 plane.setScaleX(1);
 88                 //plane.setX(plane.getX()-plane.getWidth());
 89             }
 90 
 91             plane.setX(plane.getX()+moveSpeed*time);
 92         }
 93 
 94         stage.act(Gdx.graphics.getDeltaTime());
 95         stage.draw();
 96 
 97         drawDebug();
 98     }
 99 
100     private void drawDebug(){
101         debugRenderer.begin(ShapeRenderer.ShapeType.Line);
102 
103         Rectangle rect = new Rectangle(plane.getX(), plane.getY(), plane.getWidth(), plane.getHeight());
104         //float x1 = plane.getX() + rect.x;
105         //float y1 = plane.getY() + rect.y;
106         debugRenderer.setColor(new Color(0, 1, 0, 1));
107         debugRenderer.rect(rect.x, rect.y, rect.width, rect.height);
108         debugRenderer.end();
109     }
110 
111     @Override
112     public void resize(int width, int height) {
113     }
114 
115     @Override
116     public void pause() {
117     }
118 
119     @Override
120     public void resume() {
121     }
122 }

//================add 2014-07-23显示FPS

1. 在create函数中添加代码

1 Label.LabelStyle labelStyle = new Label.LabelStyle(new BitmapFont(), Color.WHITE); //创建一个Label样式
2 Label label = new Label("FPS:", labelStyle); //创建标签，显示的文字是FPS：
3 label.setName("fpsLabel"); //设置标签名称为fpsLabel
4 label.setY(0); //设置Y为0，即显示在最下面
5 label.setX(0); //设置X值，显示为最后一个字紧靠屏幕最右侧
6 stage.addActor(label); //将标签添加到舞台

2. 在render函数中设置当前FPS值

1 Label label = (Label) stage.getRoot().findActor("fpsLabel"); //获取名为fpsLabel的标签
2 label.setText("FPS:" + Gdx.graphics.getFramesPerSecond());

本例中已可以显示FPS。

通常来讲一个游戏一般有两个camera，一个用于显示游戏类的动画等，另一个用于显示UI。stage中默认是有一个camera的。

如果共同使用一个SpriteBatch：

1 sb.end();
2 sb.setProjectionMatrix(uiCamera.combined);//往视角里画东西
3 sb.begin();
4 label.draw(sb,1);
5 sb.end();

用一个SpriteBatch，一个stage应该也是可以的。

【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/hanhongmin/p/3858835.html