CubeRendererpublic class CubeRenderer extends Object implements GLSurfaceView.Renderer| Render a pair of tumbling cubes. |
| Fields Summary |
|---|
| private boolean | mTranslucentBackground | | private Cube | mCube | | private float | mAngle |
| Constructors Summary |
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public CubeRenderer(boolean useTranslucentBackground)
mTranslucentBackground = useTranslucentBackground;
mCube = new Cube();
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| Methods Summary |
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| public int[] | getConfigSpec()
if (mTranslucentBackground) {
// We want a depth buffer and an alpha buffer
int[] configSpec = {
EGL10.EGL_RED_SIZE, 8,
EGL10.EGL_GREEN_SIZE, 8,
EGL10.EGL_BLUE_SIZE, 8,
EGL10.EGL_ALPHA_SIZE, 8,
EGL10.EGL_DEPTH_SIZE, 16,
EGL10.EGL_NONE
};
return configSpec;
} else {
// We want a depth buffer, don't care about the
// details of the color buffer.
int[] configSpec = {
EGL10.EGL_DEPTH_SIZE, 16,
EGL10.EGL_NONE
};
return configSpec;
}
| | public void | onDrawFrame(javax.microedition.khronos.opengles.GL10 gl)
/*
* Usually, the first thing one might want to do is to clear
* the screen. The most efficient way of doing this is to use
* glClear().
*/
gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
/*
* Now we're ready to draw some 3D objects
*/
gl.glMatrixMode(GL10.GL_MODELVIEW);
gl.glLoadIdentity();
gl.glTranslatef(0, 0, -3.0f);
gl.glRotatef(mAngle, 0, 1, 0);
gl.glRotatef(mAngle*0.25f, 1, 0, 0);
gl.glEnableClientState(GL10.GL_VERTEX_ARRAY);
gl.glEnableClientState(GL10.GL_COLOR_ARRAY);
mCube.draw(gl);
gl.glRotatef(mAngle*2.0f, 0, 1, 1);
gl.glTranslatef(0.5f, 0.5f, 0.5f);
mCube.draw(gl);
mAngle += 1.2f;
| | public void | onSurfaceChanged(javax.microedition.khronos.opengles.GL10 gl, int width, int height)
gl.glViewport(0, 0, width, height);
/*
* Set our projection matrix. This doesn't have to be done
* each time we draw, but usually a new projection needs to
* be set when the viewport is resized.
*/
float ratio = (float) width / height;
gl.glMatrixMode(GL10.GL_PROJECTION);
gl.glLoadIdentity();
gl.glFrustumf(-ratio, ratio, -1, 1, 1, 10);
| | public void | onSurfaceCreated(javax.microedition.khronos.opengles.GL10 gl, javax.microedition.khronos.egl.EGLConfig config)
/*
* By default, OpenGL enables features that improve quality
* but reduce performance. One might want to tweak that
* especially on software renderer.
*/
gl.glDisable(GL10.GL_DITHER);
/*
* Some one-time OpenGL initialization can be made here
* probably based on features of this particular context
*/
gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
GL10.GL_FASTEST);
if (mTranslucentBackground) {
gl.glClearColor(0,0,0,0);
} else {
gl.glClearColor(1,1,1,1);
}
gl.glEnable(GL10.GL_CULL_FACE);
gl.glShadeModel(GL10.GL_SMOOTH);
gl.glEnable(GL10.GL_DEPTH_TEST);
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