   Mesh Warping Effect ?
  Looking for some thoughts on creating an effect I would like to write, the idea is that I have some world geometry ( 2d - mesh ) that gets destroyed, but instead of simply fading out the object I would like to fancify it a bit by sucking it to a point as if being pulled in by a black hole. Similar to the mac/iphone trash effect.This would be trivial if I had shaders, but alas I don't. In the shader case the lower the pixel the more 'pinched' to its center it would get then I would skew the object and scale in height.I was thinking of building some warping matrix each tick, but I can't get my head around the right math. I have access to all parts of the mesh and their polygons/point data.Pinch -> Stretch in Height -> Skew Bottom -> then Collapse objectIdeas ?   
  something likeloop through all vertsvert_pos += ( desired_disappearing_pos - vert_pos ) * 0.001;   ;  I would rather:vert_pos += sqrt( desired_disappearing_pos - original_pos ) * 0.001;Looks more "pinchy".   