Warp bend effect on a UIView

Question

I m trying to get a similar effect to the one described in the pictures  The white area on the left isn t on the original photo  it pushes the pixels away  I ve tried using Core Image  which offered a few close effects to this  but it was too slow for my needs  I need the effect to be snappy so I can make it responsive to touch   Is there a close effect   animation in the iOS sdk that does something similar to this with a UIVIew    I couldn t find anything close  If not  can someone offer how to attack this using OpenGL   code examples are more than welcome    This effect will take an important roll in an open source class I m writing so I d prefer not to use a 3rd party class such as GPUImage if a simpler solution is available  I m targeting this class to be dependencies free

User · Answer

What you show looks like a mesh warp  That would be straightforward using OpenGL  but  straightforward OpenGL  is like straightforward rocket science   I wrote an iOS app for my company called Face Dancerthat s able to do 60 fps mesh warp animations of video from the built-in camera using OpenGL  but it was a lot of work   It does funhouse mirror type changes to faces - think  fat booth  live  plus lots of other effects

[ios] Warp \ bend effect on a UIView?

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