[Bf-funboard] Differencing Cubes
Ken Hughes
khughes at pacific.edu
Sun Aug 10 16:26:05 CEST 2008
Roger wrote:
> For some reason verts have been added to edges around the removed space
> creating unnecessary edges added to the object connecting these extraneous verts
> to corner verts of the first cube.
> It seems that blender has to make it into triangles when quads are required.
> Why ??
> There is no need to add verts along an edge, cut edges or make triangles.
>
> Is this a bug or am I doing something wrong.
>
It's a bug. The current boolean algorithm works on tris; it
preprocesses all quads into tris, does the operation, then merges faces
back together. The current merge algorithm suffers from a general issue
of numerical precision. I committed a new merge algorithm to svn about
two weeks ago that fixes this problem in most, but not all cases.
Ken
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