OpenGL ES例子

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@Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        GLSurfaceView view = new GLSurfaceView(this);        view.setRenderer(new OpenGLRenderer());        setContentView(view);    }    class OpenGLRenderer implements GLSurfaceView.Renderer {        private Cube mCube = new Cube();        private float mCubeRotation;        @Override        public void onSurfaceCreated(GL10 gl, EGLConfig config) {            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);        }        @Override        public void onDrawFrame(GL10 gl) {            gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);            gl.glLoadIdentity();            gl.glTranslatef(0.0f, 0.0f, -10.0f);            gl.glRotatef(mCubeRotation, 1.0f, 1.0f, 1.0f);            mCube.draw(gl);            gl.glLoadIdentity();            mCubeRotation -= 0.15f;        }        @Override        public void onSurfaceChanged(GL10 gl, int width, int height) {            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.glViewport(0, 0, width, height);            gl.glMatrixMode(GL10.GL_MODELVIEW);            gl.glLoadIdentity();        }    }    class Cube {        private FloatBuffer mVertexBuffer;        private FloatBuffer mColorBuffer;        private ByteBuffer mIndexBuffer;        private float vertices[] = {                -1.0f, -1.0f, -1.0f,                1.0f, -1.0f, -1.0f,                1.0f, 1.0f, -1.0f,                -1.0f, 1.0f, -1.0f,                -1.0f, -1.0f, 1.0f,                1.0f, -1.0f, 1.0f,                1.0f, 1.0f, 1.0f,                -1.0f, 1.0f, 1.0f        };        private float colors[] = {                0.0f, 1.0f, 0.0f, 1.0f,                0.0f, 1.0f, 0.0f, 1.0f,                1.0f, 0.5f, 0.0f, 1.0f,                1.0f, 0.5f, 0.0f, 1.0f,                1.0f, 0.0f, 0.0f, 1.0f,                1.0f, 0.0f, 0.0f, 1.0f,                0.0f, 0.0f, 1.0f, 1.0f,                1.0f, 0.0f, 1.0f, 1.0f        };        private byte indices[] = {                0, 4, 5, 0, 5, 1,                1, 5, 6, 1, 6, 2,                2, 6, 7, 2, 7, 3,                3, 7, 4, 3, 4, 0,                4, 7, 6, 4, 6, 5,                3, 0, 1, 3, 1, 2        };        public Cube() {            ByteBuffer byteBuf = ByteBuffer.allocateDirect(vertices.length * 4);            byteBuf.order(ByteOrder.nativeOrder());            mVertexBuffer = byteBuf.asFloatBuffer();            mVertexBuffer.put(vertices);            mVertexBuffer.position(0);            byteBuf = ByteBuffer.allocateDirect(colors.length * 4);            byteBuf.order(ByteOrder.nativeOrder());            mColorBuffer = byteBuf.asFloatBuffer();            mColorBuffer.put(colors);            mColorBuffer.position(0);            mIndexBuffer = ByteBuffer.allocateDirect(indices.length);            mIndexBuffer.put(indices);            mIndexBuffer.position(0);        }        public void draw(GL10 gl) {            gl.glFrontFace(GL10.GL_CW);            gl.glVertexPointer(3, GL10.GL_FLOAT, 0, mVertexBuffer);            gl.glColorPointer(4, GL10.GL_FLOAT, 0, mColorBuffer);            gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);            gl.glEnableClientState(GL10.GL_COLOR_ARRAY);            gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE,                    mIndexBuffer);            gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);            gl.glDisableClientState(GL10.GL_COLOR_ARRAY);        }    }
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