setRenderModePerspective not working for GeomPoints?

Scripting Issues
1

Hi everyone,

I would like to use GeomPoints to display point clouds. Though, it does not look that great yet when zooming out with the camera. The point clouds are a bit overloaded if the GeomPoints are not scaling according to their distance to the camera. Here I read that setRenderModePerspective should make them be rendered smaller/bigger when the camera is closer to/farther from the GeomPoint. But it does not work for me. Am I doing something wrong?

vdata = GeomVertexData('name', GeomVertexFormat.get_v3c4(), Geom.UHDynamic)
vertex = GeomVertexWriter(vdata, 'vertex')
color = GeomVertexWriter(vdata, 'color')
vertex.addData3(x,y,z)
color.addData4(0,1,0,1)
prim = GeomPoints(Geom.UHDynamic)
prim.addVertex(0)
geom = Geom(vdata)
geom.addPrimitive(prim)
node = GeomNode('point')
node.addGeom(geom)
nodepath= NodePath(PandaNode("nodepath"))
nodepath.attachNewNode(node)
nodepath.setRenderModeThickness(4,100)
nodepath.setRenderModePerspective(True,100)
nodepath.setLightOff()
nodepath.reparentTo(self.render)
2

The code works for me. However, perhaps you have a shader assigned? When testing your code I noticed the auto-shader doesn’t currently handle perspective points correctly.

I filed a bug report for that:

1 Like
3

That’s it! Had the auto shader active. It works for me when I just don’t assign the shader for the geom points. Thank you for looking into this and recognizing the problem!

4

The issue has been fixed and the fix will be part of Panda3D 1.10.14.

You can also set hardware-point-sprites 0 in Config.prc to work around this issue, if you need to use the shader generator, but there will be a performance penalty.

1 Like