Dynamic mesh distortion when the sprite is rotating ?

Hi,

I'm trying to implement dynamic mesh distortion in my game, but I can't get it right when the sprite is rotating... I dont know what formula I need to keep track of the sprite edges coordinates (if this is what I need ?)

Here is the modified C3 mesh distortion example (piggy + dragging meshpoints) with rotation:

mesh distortion+rotation

Anyone would know how to do it ?

Many thanks if you can help !

It involves rotating the points around the piggy center.

dropbox.com/s/4332355gekn2sfn/distortmesh_rotating.c3p

You are awesome, thank you very much R0J0hound