Drawing tetrahedron with surface normals

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Mike Glaz 2017-4-14

回答： Sanjana Ramakrishnan 2017-4-18

I have the following code to draw a tetrahedron:

x = [1 1 -1 -1]
y = [1 -1 1 -1]
z = [1 -1 -1 1]
t = [1 2 3; 1 2 4; 2 3 4; 1 3 4]
trisurf(t,x,y,z)

How do I also draw the surface normals?

Sanjana Ramakrishnan 2017-4-18

You can use 'triangulation' and 'faceNormal' functions to draw the surface normals. Refer the below link for more information:

https://www.mathworks.com/help/matlab/ref/triangulation.facenormal.html

MATLAB Mathematics Computational Geometry Delaunay Triangulation

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