Transforming geometry

Hello,

I'm trying to recreate something similar to this artists' work...

http://www.jontyhurwitz.com/anamorphosis

I've worked on two ways to achieve it and both contain elements of what I need, but not neither way is able to give me the fully desired effect.

Both methods are in the attached gh file. he first is a simple surface mirror which works in as much that it maintains the geometry of the cube, but doesn't distort in the way I want. 

The second method does distort in the way I want (as viewed from Point "V" in the attached file. This method though does not rebuild the geometry after the transformation and I can't think of an efficient way to do it. 

Does anyone know how I may be able to merge the ability to transform in the way that I want and to reconstruct the geometry afterwards?

*Update*

I stumbled across this which really helped. 

http://www.grasshopper3d.com/forum/topics/conical-anamorphosis

The only issue I now have using Daniel's gh files is trying to apply it to multiple geometries at the same time. Is this possible?

Thanks,