[Bf-committers] Modifiers in python or two new modifiers?

Tobias Oelgarte tobias.oelgarte at googlemail.com
Sun Oct 3 11:19:51 CEST 2010


I was looking into python scripting and searched for a way to write my 
own modifier. But it seams that it isn't possible. So i was thinking 
about writing my own modifier for Blender. But as i looked at the code i 
found myself in big trouble, since i really don't know about Blenders 
internal structure and my knowledge of C is limited. So I'm asking you, 
if it would be possible to add two simple modifiers, that would make 
life much easier. I could even provide the needed pseudocode for this 

The first modifier should maintain or restore the volume of mesh, after 
other modifiers (Armature, etc.) have deformed it. The way to this is 
straight forward. Like a constraint i stores the original mesh volume 
(easy to compute for closed meshes) and finds an iterative solution to 
extrude the vertices along their normals until the given volume is 
restored. Its also easy to use a vertexgroup to define which parts of 
the mesh can blow up or shrink. Would be a very nice solution for 
simulate muscles, since no shapekeys or helping Bones would be required.

The second is an alternative shrinkwrap, that does not attract vertices 
to another mesh, but repels them if they are inside, to keep them above 
the surface. Would be nice for cloth objects, that would no longer dive 
into the character, especially if the clothes are animated by bones.

How do you think about this two proposals?

Best wishes Tobias Oelgarte

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