add_edges not showing edges?

[sebastianherscher]

I've been trying to show my displacement vectors for a while and cannot get any edges to show up. Here's what I'm calling:

viewer.data.clear();
viewer.data.set_mesh(B, F);
viewer.data.add_edges(B, V,RowVector3d(0,0,1));

I know that B and V are both correct, so it should just draw a displacement line for each vertex? What am I doing wrong?

[danielepanozzo]

This looks fine. Could you try the tutorial 105: http://libigl.github.io/libigl/tutorial/105_Overlays/main.cpp

If that does not work, then it might be a shader problem (I doubt it, but if you are sure the B and F are correct there is not much else that could go wrong).

[ypiadyk]

Same problem

[danielepanozzo]

Meaning that you do not see anything also in the tutorial? This looks like a driver bug then. What GPU are you using?

[jpanetta]

Are you trying to add the edges from the solve() function? If so, they're probably being overridden by callback_pre_draw. You should add your visualization code to callback_pre_draw instead.

[ypiadyk]

Thanks for pointing out to callback_pre_draw! A lot of things are happening behind the scene)