I am new to opengl es 2.0
the task i want to perform is a curl effect. its basically shown in this video http://www.youtube.com/watch?v=zy8Yt...eature=related
i could produce the curl as shown in the image
Click image for larger version. 

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. I want to reduce the degree of curl and get back to original image in a step manner.

I assume that i have to modify the vertices positions in a step manner and update the texture in new frame.

I am not knowing how to processed. Can you please help me.

Thank you everyone