public StarField(final int aNumberOfStars, final CharGenerator aStarsGenerator) {
final int intensitySteps = aStarsGenerator.charsPerRow * aStarsGenerator.charsPerColumn;
// #if DEBUG
Assert.isTrue("stars generator should have at least one frame", intensitySteps > 0);
// #endif
myStars = new CharData[intensitySteps];
for (int idx = 0; idx < myStars.length; idx++) {
myStars[idx] = aStarsGenerator.getCharData(idx);
}
myNumberOfStars = aNumberOfStars;
myStarsX = new float[myNumberOfStars];
myStarsY = new float[myNumberOfStars];
myStarsZ = new float[myNumberOfStars];
final Random random = new Random();
for (int idx = 0; idx < myNumberOfStars; idx++) {
myStarsX[idx] = random.nextFloat(UNIVERSE_HALF);
myStarsY[idx] = random.nextFloat(UNIVERSE_HALF);
myStarsZ[idx] = random.nextFloat(UNIVERSE_HALF);
}
setAnimatedAxes(true, true, true);
}
public final void purge() {
// #if DEBUG
Assert.isTrue("still valid", myHasTextureIdFlag);
// #endif
myUtilities.purge(myOglTextureId);
myHasTextureIdFlag = false;
}
public final void makeUsing(final Bitmap aBitmap) {
// #if DEBUG
Assert.isFalse("not made", myHasTextureIdFlag);
// #endif
myWidth = aBitmap.getWidth();
myHeight = aBitmap.getHeight();
makeOpenglTexture(aBitmap);
}