Display the Vertex and Triangle labels on a meshes plot

Question

Alan 2020-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/614378-display-the-vertex-and-triangle-labels-on-a-meshes-plot

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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Answer 1

KSSV 2020-10-15

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https://ww2.mathworks.cn/matlabcentral/answers/614378-display-the-vertex-and-triangle-labels-on-a-meshes-plot#answer_514353

在 MATLAB Online 中打开

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')