Opengl 入门学习一

public class Vortex extends Activity{@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);setContentView(new VortexView(this));}} 

public class VortexView extends GLSurfaceView{VortexRtender mRender;float mX;float mY;public VortexView(Context context) {super(context);mRender=new VortexRtender();setRenderer(mRender);}@Overridepublic boolean onTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:{mX=event.getX();mY=event.getY();}break;case MotionEvent.ACTION_MOVE:{final float xdiff=mX-event.getX();final float ydiff=mY-event.getY();queueEvent(new Runnable() {@Overridepublic void run() {mRender.setmXAngle(mRender.getmXAngle()+ydiff);mRender.setmYAngle(mRender.getmYAngle()+xdiff);}});mX=event.getX();mY=event.getY();}break;default:break;}//return super.onTouchEvent(event);return true;}} 

public class VortexRtender implements GLSurfaceView.Renderer {private ShortBuffer mIndexBuffer;private FloatBuffer mVertexBuffer;private FloatBuffer mColorBuffer;private int mNumOfVertices;private float mXAngle;private float mYAngle;public float getmXAngle() {return mXAngle;}public void setmXAngle(float mXAngle) {this.mXAngle = mXAngle;}public float getmYAngle() {return mYAngle;}public void setmYAngle(float mYAngle) {this.mYAngle = mYAngle;}@Overridepublic void onDrawFrame(GL10 gl) {gl.glClearColor(0f, 0f, 0f, 1f);gl.glLoadIdentity();gl.glClear(GL10.GL_COLOR_BUFFER_BIT);gl.glRotatef(mXAngle, 1f, 0f, 0f);gl.glRotatef(mYAngle, 0f, 1f, 0f);gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVertexBuffer);gl.glColorPointer(4, GL10.GL_FLOAT, 0, mColorBuffer);gl.glDrawElements(GL10.GL_TRIANGLES, mNumOfVertices, GL10.GL_UNSIGNED_SHORT, mIndexBuffer);}@Overridepublic void onSurfaceChanged(GL10 gl, int width, int height) {gl.glViewport(0, 0, width, height);}@Overridepublic void onSurfaceCreated(GL10 gl, EGLConfig config) {gl.glEnable(GL10.GL_CULL_FACE);gl.glFrontFace(GL10.GL_CCW);gl.glCullFace(GL10.GL_BACK);gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);gl.glEnableClientState(GL10.GL_COLOR_ARRAY);initTriangle();}private void initTriangle() {float[] coords = {-0.5f, -0.5f, 0.5f, // 00.5f, -0.5f, 0.5f, // 10f, -0.5f, -0.5f, // 20f, 0.5f, 0f, // 3};mNumOfVertices=coords.length;float[] colors={1f,0f,0f,1f,//pointer 0 red0f,1f,0f,1f,//pointer 1 green0f,0f,1f,1f,//pointer 2 blue1f,1f,1f,1f,//pointer 3 white};short[] indices=new short[]{0, 1, 3, // rwg 0, 2, 1, // rbg 0, 3, 2, // rbw 1, 2, 3, // bwg};ByteBuffer vbb=ByteBuffer.allocateDirect(coords.length*4);vbb.order(ByteOrder.nativeOrder());mVertexBuffer=vbb.asFloatBuffer();ByteBuffer ibb=ByteBuffer.allocateDirect(indices.length*2);ibb.order(ByteOrder.nativeOrder());mIndexBuffer=ibb.asShortBuffer();ByteBuffer cbb=ByteBuffer.allocateDirect(colors.length*4);cbb.order(ByteOrder.nativeOrder());mColorBuffer=cbb.asFloatBuffer();mVertexBuffer.put(coords);mIndexBuffer.put(indices);mColorBuffer.put(colors);mVertexBuffer.position(0);mIndexBuffer.position(0);mColorBuffer.position(0);}} 

效果图：

这中间遇到一个问题在：

@Overridepublic boolean onTouchEvent(MotionEvent event) {switch (event.getAction()) {case MotionEvent.ACTION_DOWN:{mX=event.getX();mY=event.getY();}break;case MotionEvent.ACTION_MOVE:{final float xdiff=mX-event.getX();final float ydiff=mY-event.getY();queueEvent(new Runnable() {@Overridepublic void run() {mRender.setmXAngle(mRender.getmXAngle()+ydiff);mRender.setmYAngle(mRender.getmYAngle()+xdiff);}});mX=event.getX();mY=event.getY();}break;default:break;}//return super.onTouchEvent(event);return true;} 

//return super.onTouchEvent(event);return true; 

结果一直没有处理MotionEvent.ACTION_MOVE这个事件，然后返回return true;就可以了。也就是自己处理，不让系统处理了。