OpenGLES gluOrtho

1public class BallerfiscHActivity extends Activity {
2 /** Called when the activity is first created. */
3 @Override
4 public void onCreate(Bundle savedInstanceState) {
5super.onCreate(savedInstanceState);
6// Go fullscreen
7requestWindowFeature(Window.FEATURE_NO_TITLE);
8getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
9GLSurfaceView mView = new GLSurfaceView(this);
10mView.setRenderer(new Renderer());
11setContentView(mView);
12 }
13}

1public class Renderer implements GLSurfaceView.Renderer {
2
3 private Line mLine = new Line();
4
5 @Override
6 public void onSurfaceCreated(GL10 gl, EGLConfig config) {
7gl.glClearColor(0.0f, 0.0f, 0.0f, 0.5f);
8gl.glClearDepthf(1.0f);
9gl.glEnable(GL10.GL_DEPTH_TEST);
10gl.glDepthFunc(GL10.GL_LEQUAL);
11 }
12
13 @Override
14 public void onDrawFrame(GL10 gl) {
15gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
16gl.glLoadIdentity();
17
18mLine.draw(gl);
19 }
20
21 @Override
22 public void onSurfaceChanged(GL10 gl, int width, int height) {
23
24gl.glViewport(0, 0, width, height);
25
26gl.glMatrixMode(GL10.GL_PROJECTION);
27gl.glLoadIdentity();
28gl.glOrthox(0, width, 0, height, 0, 100);
29
30gl.glMatrixMode(GL10.GL_MODELVIEW);
31gl.glLoadIdentity();
32 }
33}

1public class Line {
2
3 private ByteBuffer mVertexBuffer;
4 private ByteBuffer mIndexBuffer;
5
6 private byte vertices[] = {
7 0, 0, 0,
8 1, 1, 0,
9 };
10
11 private byte indices[] = { 0, 1} ;
12
13 public Line() {
14mVertexBuffer = ByteBuffer.allocateDirect(vertices.length);
15mVertexBuffer.put(vertices);
16mVertexBuffer.position(0);
17mIndexBuffer = ByteBuffer.allocateDirect(indices.length);
18mIndexBuffer.put(indices);
19mIndexBuffer.position(0);
20 }
21
22 public void draw(GL10 gl) {
23gl.glFrontFace(GL10.GL_CW);
24gl.glVertexPointer(3, GL10.GL_BYTE, 0, mVertexBuffer);
25gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
26gl.glDrawElements(GL10.GL_LINES, 2, GL10.GL_UNSIGNED_BYTE, mIndexBuffer);
27gl.glDisableClientState(GL10.GL_VERTEX_ARRAY);
28 }
29}