https://www.graphics.rwth-aachen.de/media/openflipper_static/Documentation/OpenFlipper-3.0/a00964.html
Developer Documentation: PlaneNode Class Reference
developer documentationclassreference
https://docs.panda3d.org/1.10/python/reference/panda3d.core.PlaneNode
PlaneNode — Panda3D Manual
manual