Display the Vertex and Triangle labels on a meshes plot

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Alan
Alan 2020-10-15
评论： Alan 2020-10-15
Hello, I have a 3D sphere triangle meshes figure as follow , and I want to lable vertex and triangle numbers on the sphere triangle meshes. By doing this, I can easily know how many triangles in this 3D sphere and which three vertex numbers represent the specified mesh number. For example, when the vertex vector is (7, 9, 14), through this vertex vector, I can visulize the number of the corresponding mesh number is 7. We suppose the vertex is p and triangle is t.

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KSSV
KSSV 2020-10-15
x = rand (10,1);
y = rand (10,1);
tri = delaunay (x, y);
triplot (tri, x, y);
hold on;
plot (x, y, "r*");
nodes = [1:length(x)]' ; % nodes
ele = [1:size(tri,1)]' ; % elements
text(x,y,num2str(nodes),'color','b')
text(mean(x(tri),2),mean(y(tri),2),num2str(ele),'color','k')
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Alan
Alan 2020-10-15
Thanks so much for the great answer. This is what I want. I modified the 2D answer into 3D and got the right answer. Thank you!

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