Query regarding 3D mesh-grid

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Ampi 2012-10-30

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**Hello, I have a question regarding 3D meshes. Say i have plotted a meshgrid using the following command:-

     x=rand(1000,1)-1;
     y=rand(size(x))-1;
     z=sin(2*(x.^2+y.^2));
     [xx,yy]=meshgrid(linspace(-1,1,32));
     griddata(x,y,z,xx,yy);
My question is what is the matlab command except trisurf,patch that could be used to display/plot particularly the vertices,triangles and polygons that make up this mesh? Any help regarding this question would be appreciable.*___

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Answer 1

Sean de Wolski 2012-10-30

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You don't know these vertices! Is vertex 1 connected to vertex 47 or 598 or 32 and 981? You need to come up wiht a way to determine these polygons.

A Delaunay Triangulation is one method of doing this, i.e. it has a bunch of constraints, vertices who meet these constraints with one another are used to form triangles.

Delaunay triangulation may work for you in which case you could use triplot/trisurf etc.

doc DelaunayTri