[Bf-committers] Report of HE Mesh

joeedh joeeagar at prodigy.net
Mon Mar 7 00:42:45 CET 2005

> - Closed mesh only or open ?
> - if open, allowing inner boundaries ?
> - genus order supported ?
> - holes in faces ?
> - face in face ?
> - genus handles starting from a face in face
> - multiples shells, multiples components (mandatory, but handling 
> depend if we support holes in faces) ?
> - exceptional vertexs ? (eg  2 pyramids joined by the point, handling 
> change if hole in faces or not)
> **- supporting reflexive half edges ( edge with same face on each 
> side, ie tube with one seam) ?
> **- supporting tube with no seam ? ( from a topological point of view, 
> if open at each end, it is the same as a face with hole, but change 
> the requirements on structs if not)
> - degenerates cases (eg edge with no face, isolated vertices)
> And i forgot certainly more. For making things even more complex all 
> those features are not independant
> (the 2 marked ** would cause problems to other parts of blender i think)
I've actually thought about this.  It wil support:
* Closed and open meshes.
* Exceptional vertexs
* Multiple components
* Multiple shells

I think that maybe there can be isolated verts, not really difficult to 
do (just set edge pointer to NULL), the only problem is how to you make 
faces from them beyond triangles or quads.

Although, I don't want to support faces in faces or holes in faces  or 
that kind of thing.  It seems to be that you can achieve a similar 
result with various extrusion functions (like individual faces).


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