Why is tetramesh painfully slow?

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Pelajar UM
Pelajar UM 2022-4-25
评论： Pelajar UM 2022-4-25
I have a tetrahedral mesh with 35000+ vertices and 60,000+ faces. When I use tetramesh to plot it, it takes like 10 minutes.
If I use freeboundary to exctract that triangular mesh of the surface, and use trisurf, it is extremely fast, like less than a second. Of course number of data is reduced maybe by half but I don't think this is the resason.
Because if I use pdeplot3d to plot the tetrahedral mesh, similarly, it is super-fast. Less than a second also.
It seems like tetramesh is just so slow. Why?
I can't use pdeplot3d because it only accepts nodel data for its colormap. I need to use the faces for the colormap data.
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Bruno Luong
Bruno Luong 2022-4-25
编辑：Bruno Luong 2022-4-25
I know well what the convex hull is, My data are random volume not a specific geometry. Does the convex volume matter for the slownest you want to point out? Yes or no?
Pelajar UM
Pelajar UM 2022-4-25
No, it doesn't matter. tetramesh (DT) and tetramesh(elements, nodes) are both super slow.
I have attached a list of nodes and elements that you can try. Time tetramesh vs pdemesh3d. You will see the difference is massive.

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