How exactly are you constructing the mesh? A minimal reproducible example might be helpful. I think what's happening is the faces are created with vertices in the wrong order. See here for an explanation: https://www.khronos.org/opengl/wiki/Face_Culling#Winding_order
On Sunday, March 22, 2020 at 1:55:44 PM UTC-7, Michiel Cnossen wrote: > > Hi Guy's, > > I'm using pyqtgraph and opengl for the first time to make some 3d shapes. > This has been going well so far, but I cant get the colors to be as I want. > > You can see an screenshot of the shape(a tube) I have created below using > pyqtgraph.opengl.MeshData. The faces get the color I want(light red in this > case), but appear only on one side, I cant figure out how to change it on > the other side(the outside of the tube). > I don't really care about one side, as i'm going to make a closed shape > and add a thickness to the tube wall. Currently I've only made a mesh for > the outer radius of the tube, hence the color should be on the other side. > > [image: screenshot.png] > > > > > > > > > > > Can somebody help me along? I think a general explanation on how to deal > with this would be sufficient. This is probably a beginners mistake. > > Thanks in advance! > > Best regards, Michiel > > > > > > > > > -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyqtgraph+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/94cdad34-189d-44f4-b95b-978ae94c6165%40googlegroups.com.
