UIImageView will not rotate about y-axis and x-axis

[brentd49]

A seemingly simple task: rotate an image about the y-axis.

The problem: only half the image will rotate.

(Note: The z-axis works fine. It's the y-axis and x-axis where there is some issue about rotating in 3D space that is causing issues.)

I was trying to avoid Core Graphics, because I'm fairly new to OpenGL.

CABasicAnimation *rotateAnimation = [CABasicAnimation animation];
	rotateAnimation.keyPath = @"transform.rotation.z";
	rotateAnimation.fromValue = [NSNumber numberWithFloat:DegreesToRadians(0)];
	rotateAnimation.toValue = [NSNumber numberWithFloat:DegreesToRadians(360)];
	rotateAnimation.duration = 10;
	rotateAnimation.removedOnCompletion = NO;
	// leaves presentation layer in final state; preventing snap-back to original state
	rotateAnimation.fillMode = kCAFillModeForwards;
	rotateAnimation.repeatCount = 99;
	rotateAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
	
	// add the animation to the selection layer. This causes it to begin animating
	[imageView.layer addAnimation:rotateAnimation forKey:@"rotateAnimation"];