OpenGL ES 旋转的正方形
? 继续正方形，让它旋转起来：
public class GL3 extends Activity {private GLSurfaceView mGLSurfaceView;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mGLSurfaceView = new GLSurfaceView(this);mGLSurfaceView.setRenderer(new Three());setContentView(mGLSurfaceView);}@Overrideprotected void onResume() {super.onResume();mGLSurfaceView.onResume();}@Overrideprotected void onPause() {super.onPause();mGLSurfaceView.onPause();}}class Three implements Renderer {private Square square;private float rquad;public Three(){square = new Square();}@Overridepublic void onSurfaceCreated(GL10 gl, EGLConfig config) {gl.glShadeModel(GL10.GL_SMOOTH);gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);gl.glClearDepthf(1.0f);gl.glEnable(GL10.GL_DEPTH_TEST);gl.glDepthFunc(GL10.GL_LEQUAL);gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT, GL10.GL_NICEST);}@Overridepublic void onSurfaceChanged(GL10 gl, int width, int height) {if(height == 0){height = 1;}gl.glViewport(0, 0, width, height);gl.glMatrixMode(GL10.GL_PROJECTION);gl.glLoadIdentity();GLU.gluPerspective(gl, 45.0f, (float)width / (float)height, 0.1f, 100.0f);gl.glMatrixMode(GL10.GL_MODELVIEW);gl.glLoadIdentity();}@Overridepublic void onDrawFrame(GL10 gl) {Log.i("onDrawFrame", "........." + rquad);gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);gl.glLoadIdentity();gl.glTranslatef(0.0f, 0.0f, -6.0f);/** * 旋转函数 * 用当前的矩阵乘一个旋转矩阵，将值作为当前矩阵 * * rquad为旋转角度，不断递增 *///gl.glRotatef(rquad, 1.0f, 0.0f, 0.0f);//围绕X轴旋转//gl.glRotatef(rquad, 0.0f, 1.0f, 0.0f);//围绕Y轴旋转gl.glRotatef(rquad, 0.0f, 0.0f, 1.0f);//围绕Z轴旋转square.draw(gl);gl.glLoadIdentity();rquad += 0.5f;}}class Square {private FloatBuffer vertexBuffer;private float vertices[] = { -1.0f, -1.0f, 0.0f, 1.0f, -1.0f, 0.0f, -1.0f,1.0f, 0.0f, 1.0f, 1.0f, 0.0f };public Square() {ByteBuffer byteBuf = ByteBuffer.allocateDirect(vertices.length * 4);byteBuf.order(ByteOrder.nativeOrder());vertexBuffer = byteBuf.asFloatBuffer();vertexBuffer.put(vertices);vertexBuffer.position(0);}public void draw(GL10 gl) {gl.glFrontFace(GL10.GL_CW);gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer);gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);//这里给正方形设置了颜色RGBA值gl.glColor4f(0.5f, 0.5f, 1.0f, 1.0f);gl.glDrawArrays(GL10.GL_TRIANGLE_STRIP, 0, vertices.length / 3);gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);}}?
画正方形注释，见：http://yuanyao.iteye.com/blog/782474