public synchronized void draw(FlipRenderer renderer, GL10 gl) {
frontCards.buildTexture(renderer, gl);
backCards.buildTexture(renderer, gl);
if (!TextureUtils.isValidTexture(frontCards.getTexture())
&& !TextureUtils.isValidTexture(backCards.getTexture())) {
return;
}
if (!visible) {
return;
}
switch (state) {
case STATE_INIT:
case STATE_TOUCH:
break;
case STATE_AUTO_ROTATE:
{
animatedFrame++;
float delta = (forward ? ACCELERATION : -ACCELERATION) * animatedFrame % 180;
float oldAngle = accumulatedAngle;
accumulatedAngle += delta;
if (oldAngle < 0) { // bouncing back after flip backward and over the first page
Assert.assertTrue(forward);
if (accumulatedAngle >= 0) {
accumulatedAngle = 0;
setState(STATE_INIT);
}
} else {
if (frontCards.getIndex() == maxIndex - 1
&& oldAngle
> frontCards.getIndex()
* 180) { // bouncing back after flip forward and over the last page
Assert.assertTrue(!forward);
if (accumulatedAngle <= frontCards.getIndex() * 180) {
setState(STATE_INIT);
accumulatedAngle = frontCards.getIndex() * 180;
}
} else {
if (forward) {
Assert.assertTrue(
"index of backCards should not be -1 when automatically flipping forward",
backCards.getIndex() != -1);
if (accumulatedAngle >= backCards.getIndex() * 180) { // moved to the next page
accumulatedAngle = backCards.getIndex() * 180;
setState(STATE_INIT);
controller.postFlippedToView(backCards.getIndex());
swapCards();
backCards.resetWithIndex(frontCards.getIndex() + 1);
}
} else { // backward
if (accumulatedAngle <= frontCards.getIndex() * 180) { // firstCards restored
accumulatedAngle = frontCards.getIndex() * 180;
setState(STATE_INIT);
}
}
}
} // ends of `if (oldAngle < 0) {} else {}`
if (state == STATE_INIT) {
controller.postHideFlipAnimation();
} else {
controller.getSurfaceView().requestRender();
}
}
break;
default:
AphidLog.e("Invalid state: " + state);
break;
}
float angle = getDisplayAngle();
if (angle < 0) {
frontCards.getTopCard().setAxis(Card.AXIS_BOTTOM);
frontCards.getTopCard().setAngle(-angle);
frontCards.getTopCard().draw(gl);
frontCards.getBottomCard().setAngle(0);
frontCards.getBottomCard().draw(gl);
// no need to draw backCards here
} else {
if (angle < 90) { // render front view over back view
frontCards.getTopCard().setAngle(0);
frontCards.getTopCard().draw(gl);
backCards.getBottomCard().setAngle(0);
backCards.getBottomCard().draw(gl);
frontCards.getBottomCard().setAxis(Card.AXIS_TOP);
frontCards.getBottomCard().setAngle(angle);
frontCards.getBottomCard().draw(gl);
} else { // render back view first
frontCards.getTopCard().setAngle(0);
frontCards.getTopCard().draw(gl);
backCards.getTopCard().setAxis(Card.AXIS_BOTTOM);
backCards.getTopCard().setAngle(180 - angle);
backCards.getTopCard().draw(gl);
backCards.getBottomCard().setAngle(0);
backCards.getBottomCard().draw(gl);
}
}
if ((frontCards.getView() == null || TextureUtils.isValidTexture(frontCards.getTexture()))
&& (backCards.getView() == null || TextureUtils.isValidTexture(backCards.getTexture())))
firstDrawFinished = true;
}
private void applyTexture(FlipRenderer renderer, GL10 gl) {
frontCards.buildTexture(renderer, gl);
backCards.buildTexture(renderer, gl);
}