libgdx學習筆記.doc

Texture（紋理）public class HelloWorld implements ApplicationListener public SpriteBatch batch; / 聲明紋理 public Texture texture; public Sprite sprite; Override public void create() batch = new SpriteBatch(); / 實例化texture texture = new Texture(Gernal(data/Potato.jpg); public void render() Gdx.gl.glClearColor(1, 1, 1, 1);/ 設置背景為白色 Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);/ 清屏 batch.begin(); batch.draw(texture, 0, 0, 480, 320); batch.end(); SpriteBatch類（SpriteBatch就是一個畫筆）首先聲明類名，實例化、在繪制的的時候分三步，必須先調(diào)用begin（）方法，然后再調(diào)用draw()方法，最后畫完了調(diào)用end（）結(jié)束。public class HelloWorld implements ApplicationListener public SpriteBatch batch; / 聲明紋理 public Texture texture; public Sprite sprite; public void create() batch = new SpriteBatch(); / 實例化texture texture = new Texture(Gernal(data/Potato.jpg); public void render() Gdx.gl.glClearColor(1, 1, 1, 1);/ 設置背景為白色 Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);/ 清屏 batch.begin(); batch.draw(texture, 0, 0, 480, 320); batch.end(); TextureRegion 類（截圖工具）public class HelloWorld implements ApplicationListener public SpriteBatch batch; / 聲明紋理 public Texture texture; public TextureRegion textureRegion; public Sprite sprite; public void create() batch = new SpriteBatch(); / 實例化texture texture = new Texture(Gernal(data/Potato.jpg); textureRegion = new TextureRegion(texture, 0, 0, 512, 512); / textureRegion = new TextureRegion(texture, 512, 512, -512, / -512);-反方向截圖 public void dispose() batch.dispose(); texture.dispose(); public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); batch.begin(); / batch.draw(texture, 0, 0, 480, 320); batch.draw(textureRegion, 0, 0, 480, 320); batch.end(); Sprite類public class HelloWorld implements ApplicationListener public SpriteBatch batch; / 聲明紋理 public Texture texture; public Sprite sprite; public void create() batch = new SpriteBatch(); / 實例化texture texture = new Texture(Gernal(data/Potato.jpg); TextureRegion region = new TextureRegion(texture, 512, 0, 512, 512); sprite = new Sprite(region); sprite.setSize(120, 120);/ 設置繪制的大小，為了方便我們設置的120,120，小一點方便查看 sprite.setOrigin(sprite.getWidth() / 2, sprite.getHeight() / 2);/ 設置旋轉(zhuǎn)的中心點，咱們就設置為屏幕的中心點 sprite.setRotation(50);/ 這個是以上面設置的中心點為中心，旋轉(zhuǎn)一定角度的設置 sprite.setPosition(150, 110);/ 起始位置設置為中心區(qū)域附近（150,110） sprite.setColor(1, 0, 1, 1);/ 顏色就設置為粉色吧 public void render() Gdx.gl.glClearColor(1, 1, 1, 1);/ 設置背景顏色為白色 Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);/ 清屏 batch.begin(); sprite.draw(batch); batch.end(); BitmapFont類public class HelloWorld implements ApplicationListener public SpriteBatch batch; BitmapFont font; public void create() font = new BitmapFont(Gernal(data/Potato.fnt), Gernal(data/Potato.png), false); / font.setColor(0.5f,0.4f,0.6f,1);/設置顏色 / / font.setScale(1.0f);/字體比例大小 batch = new SpriteBatch(); Override public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); batch.begin(); font.draw(batch, -奮斗小土豆丶, 200, 160); font.drawMultiLine(batch, 愛情來得快，去的也快,n只有豬肉卷是永恒的, Gdx.graphics.getWidth() / 5, 0.8f * Gdx.graphics.getHeight(); batch.end(); Animation類Animation walkAnimation = new Animation(float fDuration, keyFrames)（1）TextureRegion數(shù)組代碼：TextureRegion tmp = TextureRegion.split(walkSheet, walkSheet.getWidth() / FRAME_COLS, walkSheet.getHeight() /FRAME_ROWS);這個段代碼是怎么回事呢？他是采用分離式的方法分分割傳入的紋理，將獲得的紋理分為一個二維數(shù)組。記住，前提是分割的矩形大小相等。然后使用臨時變量，填充walkframes數(shù)組。這是樣使用起來很方便。NORMAL：這個不用說了，就是正常的播放模式。REVERSED：反向播放，從后向前播放，這個就像人物倒退的跑。LOOP：持續(xù)播放，這個比較常用。LOOP_REVERSED：持續(xù)倒退播放。LOOP_PINGPONG: 向前播放幾張圖片，再向后播放幾幀圖片 代碼stateTime += Gdx.graphics.getDeltaTime()，他是一個獲取一個狀態(tài)下所持續(xù)的一個時間。就像我們在現(xiàn)實世界使用的時間一樣，一般配合系統(tǒng)時間使用Gdx.graphics.getDeltaTime()：獲取系統(tǒng)渲染時間，一般默認是0.173秒。 public class Map implements ApplicationListener private static final int FRAME_COLS = 6; private static final int FRAME_ROWS = 5; Animation walkAnimation; Texture walkSheet; TextureRegion walkFrames; SpriteBatch batch; TextureRegion currentFrame; float stateTime; Override public void create() walkSheet = new Texture(Gernal(animation_sheet.png); TextureRegion tmp = TextureRegion.split(walkSheet, walkSheet.getWidth() / FRAME_COLS, walkSheet.getHeight() / FRAME_ROWS); walkFrames = new TextureRegionFRAME_COLS * FRAME_ROWS; int index = 0; for (int i = 0; i FRAME_ROWS; i+) for (int j = 0; j FRAME_COLS; j+) walkFramesindex+ = tmpij; walkAnimation = new Animation(0.025f, walkFrames); walkAnimation.setPlayMode(walkAnimation.LOOP_PINGPONG); batch = new SpriteBatch(); stateTime = 0f; public void render() Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); stateTime += Gdx.graphics.getDeltaTime(); currentFrame = walkAnimation.getKeyFrame(stateTime, true); batch.begin(); batch.draw(currentFrame, Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2); batch.end(); Image控件（圖片） Image(Texture texture) 和 Image(TextureRegion region)public class MyGdxGame implements ApplicationListener Stage stage; Image VictoriaImage; TextureRegion region; Texture tex; public void create() tex = new Texture(Gernal(data/1.png); region = new TextureRegion(tex, 0, 0, 512, 512); VictoriaImage = new Image(region); VictoriaImage.setColor(Color.PINK);/顏色 VictoriaImage.setScale(0.5F);/縮放比例 VictoriaImage.setPosition(230, 40);/繪畫起點 VictoriaImage.setOrigin(0, 0);/ 設置旋轉(zhuǎn)中心 VictoriaImage.setRotation(45);/旋轉(zhuǎn)中心 VictoriaImage.setSize(390, 300);/繪畫大小 stage = new Stage(480, 320, false); Gdx.input.setInputProcessor(stage); stage.addActor(VictoriaImage); public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); stage.act(); stage.draw(); 按鈕（Button）ImageButton(Drawable imageUp, Drawable imageDown, Drawable imageChecked) ImageButton(Skin skin) public class MyGdxGame implements ApplicationListener Stage stage; TextureRegionDrawable up; TextureRegionDrawable down; TextureRegion buttonUp; TextureRegion buttonDown; Texture tex; ImageButton button; public void create() tex = new Texture(Gernal(data/control.png); TextureRegion tmp = TextureRegion.split(tex, 120, 120); buttonUp = tmp00; buttonDown = tmp01; up = new TextureRegionDrawable(buttonUp); down = new TextureRegionDrawable(buttonDown); button = new ImageButton(up, down); button.setPosition(100, 100); stage = new Stage(480, 320, false); Gdx.input.setInputProcessor(stage); stage.addActor(button); public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); stage.act(); stage.draw(); Actor類(演員)public class mario extends Actor public static float x;public static float y;public static float statetime;Texture texture;TextureRegion currentFrame;ImageButton buttonL;ImageButton buttonR;Animation aniRight;Animation aniLeft;Animation aniIdle;public static int LeftState = 1;public static int IdeltState = 2;public static int RightState = 3;public static int state = 2;public mario(float x, float y) this.x = x;this.y = y;this.show();public void show() texture = new Texture(Gernal(data/mario.png);TextureRegion spilt = TextureRegion.split(texture, 64, 64);TextureRegion miror = TextureRegion.split(texture, 64, 64);for (TextureRegion region1 : miror) for (TextureRegion region2 : region1) region2.flip(true, false);/ 右TextureRegion regionR = new TextureRegion3;regionR0 = spilt01;regionR1 = spilt02;regionR2 = spilt00;aniRight = new Animation(0.1f, regionR);/ 左TextureRegion regionL = new TextureRegion3;regionL0 = miror01;regionL1 = miror02;regionL2 = miror00;aniLeft = new Animation(0.1f, regionL);/ 空閑TextureRegion regionI = new TextureRegion1;regionI0 = spilt00;aniIdle = new Animation(0.1f, regionI);buttonL = new ImageButton(new TextureRegionDrawable(spilt10),new TextureRegionDrawable(spilt11);buttonR = new ImageButton(new TextureRegionDrawable(miror10),new TextureRegionDrawable(miror11);buttonL.setPosition(20, 20);buttonR.setPosition(200, 20);buttonL.addListener(new InputListener() public void touchUp(InputEvent event, float x, float y,int pointer, int button) state = IdeltState;super.touchUp(event, x, y, pointer, button);public boolean touchDown(InputEvent event, float x, float y,int pointer, int button) state = LeftState;return true;);buttonR.addListener(new InputListener() public void touchUp(InputEvent event, float x, float y,int pointer, int button) / TODO Auto-generated method stubstate = IdeltState;super.touchUp(event, x, y, pointer, button);public boolean touchDown(InputEvent event, float x, float y,int pointer, int button) / TODO Auto-generated method stubstate = RightState;return true;);public void update()if(state = LeftState)this.x -=1.5f;if(x400) this.x = 400;this.x = x;public void aniCheck()if(state = LeftState)currentFrame = aniLeft.getKeyFrame(statetime, true);else if(state = RightState)currentFrame = aniRight.getKeyFrame(statetime, true);else if (state = IdeltState) currentFrame = aniIdle.getKeyFrame(statetime,true);public void draw(SpriteBatch batch, float parentAlpha) statetime+=Gdx.graphics.getDeltaTime();this.update();this.aniCheck();batch.draw(currentFrame, x, y);public void act(float delta) / TODO Auto-generated method stubsuper.act(delta);public class MyGdxGame implements ApplicationListener Stage stage; Mario mario; Image image; Override public void create() image = new Image(new Texture(Gernal(data/13.jpg); image.setPosition(0, 170); stage = new Stage(480, 320, false); mario = new Mario(100, 190); Gdx.input.setInputProcessor(stage); stage.addActor(image); stage.addActor(mario); stage.addActor(mario.buttonL); stage.addActor(mario.buttonR); Override public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); stage.act(); stage.draw();Stage（舞臺）一個Stage必須負責接收輸入事件，同時將它分配給演員。這通常是通過Stage的gdx.input.setinputprocessor來實現(xiàn)。Stage(float width, float height, boolean keepAspectRatio, SpriteBatch batch)public class MyGame implements ApplicationListener GameStage gameStage; StartStage startStage; StoreStage storeStage; public void create() gameStage = new GameStage(); startStage = new StartStage(); storeStage = new StoreStage(); public void selectStageRender() if(Constants.Stageflag = Constants.StartStageOn) Gdx.input.setInputProcessor(startStage); startStage.act(); startStage.draw(); else if (Constants.Stageflag = Constants.GameStageOn) Gdx.input.setInputProcessor(gameStage); gameStage.act(); gameStage.draw(); else if (Constants.Stageflag = Constants.StoreStageOn) Gdx.input.setInputProcessor(storeStage); storeStage.act(); storeStage.draw(); public void render() Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); selectStageRender(); public class StartStage extends Stage Texture texture; TextureRegion startRegion; Image startImage; Image newGameBtn; TextureRegion new