【开源java游戏框架libgdx专题】-10-核心库-Viewport

 1 package com.mygdx.viewport;
 2 
 3 import com.badlogic.gdx.graphics.Texture;
 4 import com.badlogic.gdx.graphics.g2d.Batch;
 5 import com.badlogic.gdx.scenes.scene2d.Actor;
 6 /**
 7  * 我的演员类
 8  * @author Jack(乐智)
 9  * @blog dtblog.cn
10  * @qq 984137183
11  */
12 public class MyActor extends Actor {
13     private Texture texture;
14     public MyActor(){
15         this.init();
16     }
17     private void init() {
18         texture=new Texture("badlogic.jpg");
19     }
20     @Override
21     public void draw(Batch batch, float parentAlpha) {
22         batch.draw(texture, 0, 0);
23     }
24     
25 }
26 
27 
28 package com.mygdx.viewport;
29 
30 import com.badlogic.gdx.ApplicationAdapter;
31 import com.badlogic.gdx.Gdx;
32 import com.badlogic.gdx.graphics.GL20;
33 import com.badlogic.gdx.graphics.g2d.SpriteBatch;
34 import com.badlogic.gdx.scenes.scene2d.Stage;
35 import com.badlogic.gdx.utils.viewport.ExtendViewport;
36 import com.badlogic.gdx.utils.viewport.ScreenViewport;
37 import com.badlogic.gdx.utils.viewport.StretchViewport;
38 
39 /**
40  * 伸展视口
41  * @author Jack(乐智)
42  * @blog dtblog.cn
43  * @qq 984137183
44  */
45 public class UseStretchViewport extends ApplicationAdapter{
46     //精灵画笔
47     public SpriteBatch batch;
48     //声明演员
49     public MyActor actor;
50     //声明舞台
51     public Stage stage;
52     //声明伸展视口,等比缩放
53     private StretchViewport viewport;
54     //声明延展视口
55     private ExtendViewport extViewport;
56     private ScreenViewport screenViewport;//屏幕视口
57     @Override
58     public void create() {
59         //初始化精灵画笔
60         batch=new SpriteBatch();
61         //初始化演员
62         actor=new MyActor();
63         viewport=new StretchViewport(800, 480);
64         extViewport =new ExtendViewport(200, 200);
65         screenViewport=new ScreenViewport();
66         //初始化舞台
67         //        stage=new Stage(viewport);
68         //        stage=new Stage(extViewport );
69         stage=new Stage(screenViewport);
70         //添加演员
71         stage.addActor(actor);
72 
73     }
74     @Override
75     public void render() {
76         //设置背景颜色
77         Gdx.gl.glClearColor(1, 1, 1, 1);
78         Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
79         //更新舞台逻辑
80         stage.act();
81         //绘制舞台内容
82         stage.draw();
83     }
84 
85 }