Need help with new MeshDrawer class

I’m trying to draw some thick lines so I’m not using LineSegs. In the 1.6 and up you are supposed to be able to draw with meshdrawer but I couldn’t find a sample on that and my initial efforts are crashing.

a.segment(Vec3(0,0,0), Vec3(10,10,10), 0, 5, Vec4(0,255,0,125));
Assertion failed: !is_empty() at line 270 of c:\p\panda3d-1.6.0-win32(2)\panda3d-1.6.0\built\include\nodePath.I

Help will be welcome.

I need to write a doc page or a tutorial explaining it. I will do so soon.

As for your crash, I believe you need to call begin() first:

a.begin(, render)

I’ve tried

a.begin(, render)


a.begin(, render)

and still crashes

Don’t know if it has something to do with it but it outputs this warning too

:loader(warning): Unable to load libp3ptloader.dll: Invalid access to memory location

That’s a known bug, but entirely unrelated.