Howto calculate the Volume of a triangular mesh after using the triangulation function

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Markus 2017-11-23

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https://ww2.mathworks.cn/matlabcentral/answers/368794-howto-calculate-the-volume-of-a-triangular-mesh-after-using-the-triangulation-function

评论： Markus 2017-11-23

Hello together,

I extracted from an existing mesh from another program and specific data format information about the points (x,y,z) and the connectivity table. Both information works perfectly with the triangulation function https://de.mathworks.com/help/matlab/ref/triangulation.html , which allows me to reproduce the 3D-mesh in matlab with the same elements. But here I got stuck. I need the volume of the resulting geometry. I found two functions which seems promising but both failed https://de.mathworks.com/matlabcentral/fileexchange/26982-volume-of-a-surface-triangulation and https://de.mathworks.com/matlabcentral/fileexchange/15221-triangulationvolume. Any one else faced once the same problem or has an idea?

Thanks in advance, Markus

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KSSV 2017-11-23

You got tetrahedrons eh?

Markus 2017-11-23

No, right now its only triangles. You are right this can be a Problem. However, then i have to generate tetrahedrons first. the boundary for 3D tetrahedrons are them the mesh with the defined z coordinates and a plain mesh with Zero elevation. Any idea how to do this?

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