Plot 3d closed surface with sparse data

Hello,

I am trying to plot a heart, chest , lung etc, surface with matlab. I have the scattered data, and the clockwise arrangemnt of triangles, by this I mean I have the nodes of each corner of each triangle, the list looks like this,

for the nodes: x y z 1 0.0473 0.0409 0.0428 2 0.0856 0.0285 0.0068 3 0.0724 0.0755 0.0081 4 0.0178 0.0815 0.0118 5 0.0746 0.0033 -0.0366 6 0.0896 0.0546 -0.0355 and for the triangles node 1 2 3 1 50 51 144 2 50 144 140 3 140 144 145 4 140 145 141 5 141 145 146 6 141 146 147

Is there some way to plot the triangular surface in matlab with just one color?. When I call delanuay the mesh is different from the defined one by this list, and the color depends on the hight, I have not been able to plot the whole surface with just one color.

[Pedro]

The format of the list was not added correctly, but it is like this first nodes and then triangles vertex index

if true
  % code
1  0.0473  0.0409  0.0428
 2  0.0856  0.0285  0.0068
 3  0.0724  0.0755  0.0081
 4  0.0178  0.0815  0.0118
 5  0.0746  0.0033 -0.0366
 6  0.0896  0.0546 -0.0355
 7  0.0473  0.0921 -0.0389
 8  0.0089  0.0534 -0.0335
end2  
if true
  % code
1  50  51 144
 2  50 144 140
 3 140 144 145
 4 140 145 141
 5 141 145 146
 6 141 146 147
 7 141 147 148
 8 141 148 149

end

Answer 1

[Sean de Wolski]

doc patch

[Pedro]

but how do i use that command?

[Sean de Wolski]

You feed it the triangulation faces and vertices and it draw them

Did you open the doc?

[Pedro]

thanks Sean, it worked, now i have another problem, I need to use another triangulation matrix with just 3 elements instead of 4, this means 3 nodes for a triangle, instead of 4 for a polygon, I am not really sure if trimesh or trisurf, or other matlab function can manage that.

[Sean de Wolski]

patch can...

[Pedro]

can I use only 3 vertices for a 3d surface?