Could you recreate the 3D page rotation effect seen in iBooks using only Core Animation or will you need to use OpenGL ES?

Question

I read an article explaining that Apple uses OpenGL ES to implement the page rotation effect in iBooks . Since you can perform 3D animation on 2D layers using only Core Animation, what are some of the reasons why you would have to use OpenGL ES to create this page transition animation?

Thanks in advance for your thoughts!

Answer 1

Stephen Troton-Smith accomplished this without OpenGL. http://blog.steventroughtonsmith.com/2010/02/apples-ibooks-dynamic-page-curl.html

However, it uses the Private API, so you can be careful.