Want to learn OpenGL ES for iPhone

Hi,
as subject suggests I want learn OpenGL ES for the iPhone.
I know DirectX quite well, but OpenGL is new to me.
Can you recommend some good sources to learn from? I tried googling but didn't find much helpful information (say compared to DirectX)
Any help is really appreciated.

Apple has several examples of basic OGL ES on the iPhone Developer page be sure to look at those. Also note that if you choose OGL ES as your basic program in Xcode it will create a basic program with all the of the framebuffer housekeeping pre-wired for you so you don't have to slog through that.
Other good sources are the keepers of OGL ES themselves Khronos: http://www.khronos.org/opengles/
Also worth checking out is the maker/licensers of the graphics Apple actually uses in the phone PowerVR MBX: http://www.imgtec.com/PowerVR/insider/powervr-sdk.asp
Good luck,
=Tod

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