Trimming a toposurface based on slope, without separating it into millions of tiny surfaces

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Permalink Reply by David Rutten on February 28, 2013 at 3:31am

All I can say is that I tried to write an algorithm for this a couple of years ago but couldn't come up with a fast enough solution. Plus I was only working with meshes at the time, I didn't consider nurbs surfaces.

I'm not sure that a toposurface is supposed to be (mesh or nurbs or something else) but it's probably important to know before one tries to solve this.

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Jacob Buchenauer on February 28, 2013 at 5:53pm

I was using a toposurface generated through this process:

a) overlap a bunch of terrain in sketchup, and export the overlapping terrain as a .obj mesh

b) import into rhino and drape a surface over the mesh to soften up the edges.

So the end result was a single planar surface, but I could just as easily use a mesh.

Permalink Reply by David Rutten on March 1, 2013 at 2:58am

Planar? 

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Jacob Buchenauer on March 1, 2013 at 6:27pm

sorry not planar, I meant just a single surface.