Hi,
I can hardly understanding why LunarLander save the Canvas and restore
it after rotating the Canvas to simulate the rotation of the rocket.
I commented the 2 lines out and reinstall the apk, but I found nothing
changed.
Could anybody kindly help me understanding what 'matrix' and 'clip'
are saved to the stack here as the SDK document dipicts?
// canvas.save();
canvas.rotate((float) mHeading, (float) mX, mCanvasHeight
- (float) mY);
if (mMode == STATE_LOSE) {
mCrashedImage.setBounds(xLeft, yTop, xLeft +
mLanderWidth, yTop
+ mLanderHeight);
mCrashedImage.draw(canvas);
} else if (mEngineFiring) {
mFiringImage.setBounds(xLeft, yTop, xLeft +
mLanderWidth, yTop
+ mLanderHeight);
mFiringImage.draw(canvas);
} else {
mLanderImage.setBounds(xLeft, yTop, xLeft +
mLanderWidth, yTop
+ mLanderHeight);
mLanderImage.draw(canvas);
}
// canvas.restore();
Thanks in advance.
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