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I'm reading the Loper et al. 2015 paper on the Skinned Multi-Person Linear Model and I came across this:

What we would like is a vertex-based model that has the expressive power of the triangle deformation models so that it can capture a whole range of natural shapes and poses.

I'm not a Computer Science student, I'm actually a Physics student, so I only have an elementary understanding of these matters.

What is the difference between a triangle-based and a vertex-based skinning model? Why is the triangle-based one more "expressive"?

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  • $\begingroup$ And these terms aren't adressed anywhere in the paper? $\endgroup$
    – Christian Rau
    Jan 29, 2018 at 23:01
  • $\begingroup$ Not in a meaningful way. The paper deals with a vertex based model (the equations and the logic behind it describe the deformation of the mesh in terms of the displacement of the vertices) but it doesn't discuss triangle-based models. I can only guess what they're about. Moreover I don't know why triangle-based models would be more "expressive" than vertex-based ones. $\endgroup$
    – ViolaC
    Jan 30, 2018 at 14:15
  • $\begingroup$ They are cited from this paper: people.csail.mit.edu/sumner/research/deftransfer/… $\endgroup$
    – Wyck
    Jan 30, 2018 at 18:05
  • $\begingroup$ @Wyck so the expressiveness of triangle-based models is just a practical fact, there is no mathematical or computational reason $\endgroup$
    – ViolaC
    Feb 1, 2018 at 14:19

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