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Thanks! A very simple but great way to estimate mean curvatures@NathanReed answer. For my case, I also need an estimate of triangular mesh curvature, and I support this is what i was looking for. However, could you please show me (or any recommended literature) how is the following equation derived?

$$\frac{(n_1 - n_0).(p_1 - p_0)}{||p_1 - p_0||^2}$$

Julien Guertault
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H. Wang
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    Hello, welcome to CGSE. It's difficult to infer the context of your question when it is just referring to someone's answer. Could you please quote and/or link the relevant discussion in your question? – Julien Guertault Sep 19 '17 at 08:39
  • please kindly click this link: https://computergraphics.stackexchange.com/questions/1718/what-is-the-simplest-way-to-compute-principal-curvature-for-a-mesh-triangle/1719#1719?newreg=1059615fd16d40dcbcbc73980ae075de – H. Wang Sep 19 '17 at 10:52
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    I've extended my original answer with more explanation about the derivation of the formula. I think this question can be closed. – Nathan Reed Sep 21 '17 at 05:34

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