Cotangent matrix

[DanielPiker]

It’s not a hugely complex calculation, so even for fairly large meshes shouldn’t be too slow to do like this:

Discrete Laplacian

I presume you are referring to the cotan weighting option for the Laplacian smoothing force in the old version of Kangaroo. (Kangaroo2 has instead the SoapFilm goal) MeshMachine also used cotan weighted smoothing for the relocation of the vertices. Here’s an example showing the effect of cotangent weighting on smoothing values per vertex (shown as colours). The mesh is deliberately uneven in triangle size. cotanweight_example.gh (28.0 KB) On the left is uniform weighted smoothing,…

Discrete Laplacian

much faster version: cotanweight_example3.gh (154.5 KB)