How to present OBJ file (read as a mesh file) in a contour plot?

I have collected some scans (file format of model from the scanner: .obj, .mtl and .jpg). I am able to read the files as a 3D mesh, and am looking for ways I can create a contour plot under the mesh

[KSSV]

As you have data in hand...can't you use contour ?

Answer 1

[ANKUR KUMAR]

An example of creating a mesh is here,

[X,Y] = meshgrid(-5:.2:5);
R = sqrt(X.^2 + Y.^2);
Z = sin(R)./R;
mesh(X,Y,Z)

[KSSV]

@ ANKUR KUMAR the user already able to plot the mesh..he wants the contour plot.

@ Colin Hollar attach one sample file...it can be done.

[ANKUR KUMAR]

Ops. I misread the question.

Answer 2

[KSSV]

This should work out:

obj = readObj(fname) ;
p = obj.v ;
t = obj.f ; 

N = 10 ;
[c,h]=tricontour(t,p(:,1),p(:,2),p(:,3),N) ;

Get the tricontour function from the file exchange: https://in.mathworks.com/matlabcentral/fileexchange/38858-contour-plot-for-scattered-data?focused=5249779&tab=function

[KSSV]

I think you should draw mesh for that, try:

trisurf(t,p(:,1),p(:,2),p(:,3))

As your question was plotting contours...I gave code for contours. Also change the value of N and try. Increase the value of N.