Trimesh plots diferently using trimesh(TO) vs trimesh(T,x,y,z)

Depending on the input format, I get different results for trimesh when I give it the same data, i.e the following produce different plots

trimesh(T0); 
trimesh(T0.ConnectivityList',T0.Points(:,1)',T0.Points(:,2)',T0.Points(:,3)'); 

Answer 1

[Matt J]

You haven't attached your .mat file so we can't try to reproduce it. I would guess that the problem is that you've transposed the ConnectivityList for some reason. My attached example.mat demonstrates that that will give you wrong results.

load example

TO=triangulation(T, x, y,z);

subplot(1,3,1); trimesh(TO); axis vis3d
subplot(1,3,2); trimesh(TO.ConnectivityList,x,y,z); axis vis3d
subplot(1,3,3); trimesh(TO.ConnectivityList',x,y,z); axis vis3d

[David]

Thank you! For some reasion trimesh wants the transpose of the xyz, but not the ConnectivityList.

trimesh(T0); 
% Correct plot
trimesh(T0.ConnectivityList,T0.Points(:,1)',T0.Points(:,2)',T0.Points(:,3)'); 
% Incorrect plot
trimesh(T0.ConnectivityList',T0.Points(:,1)',T0.Points(:,2)',T0.Points(:,3)'); 

[Steven Lord]

I've reported this to the development staff.

[Matt J]

Thank you!

You're welcome, but if this resolves your question, please Accept-click the Answer.

For some reasion trimesh wants the transpose of the xyz, but not the ConnectivityList.

You haven't attached your data (and we don't know your Matlab version you are using), but I can't reproduce that with my example.mat. The plot is indifferent to transposition of x,y,z.

load example

TO=triangulation(T, x, y,z);

subplot(1,3,1); trimesh(TO); axis vis3d
subplot(1,3,2); trimesh(TO.ConnectivityList,x,y,z); axis vis3d
subplot(1,3,3); trimesh(TO.ConnectivityList,x',y',z'); axis vis3d

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