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## Estimate curvature based on a triangle mesh

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### #1DanielXiao  Members

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Posted 21 June 2014 - 08:59 PM

hi everyone,

I am freshman to start learning OpenGL. I am working on a project which I need  caculate the curvature of my 3D model. however I can't find the available free code to finish my work.

my requirement: 1. can be compiled by Visual Studio 2008

2. input format is obj or wrl

If you have any information to help me work out this, please reply me.

Thank you very much!

### #2Promit  Senior Moderators

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Posted 21 June 2014 - 09:48 PM

What have you tried?

Edited by Promit, 21 June 2014 - 09:49 PM.

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### #3JohnnyCode  Members

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Posted 22 June 2014 - 06:05 AM

smooth normals define actual unpresent derivated "smooth" surface of a tri geometry. You can use the 3 smooth normals of a triangle and compare them to the face normals of the triangle (face normals of a triangle are all equal for the three verticies of it). This will express the unpresent curved surface over the triangle. You can derive the surface from this information, to the resolution you wish.

### #4DanielXiao  Members

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Posted 22 June 2014 - 08:29 AM

smooth normals define actual unpresent derivated "smooth" surface of a tri geometry. You can use the 3 smooth normals of a triangle and compare them to the face normals of the triangle (face normals of a triangle are all equal for the three verticies of it). This will express the unpresent curved surface over the triangle. You can derive the surface from this information, to the resolution you wish.

Thanks a lot,  Your advice is really important for me to solve my problem.

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