Game Development Reference
In-Depth Information
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 sizeChanged(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 surfaceCreated(GL10 gl) {
/*
* 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, 0.5f);
} else {
gl.glClearColor(1, 1, 1, 0.5f);
}
