From Garry's Mod
Returns info about given plane of non-nodraw brush model surfaces of the entity's model. Works on worldspawn as well.
This only works on entities with brush models.
The index of the plane to get info of. Starts from 0.
The origin of the plane.This will be either the first vertex's position (if available) or the plane's normal multiplied by the plane's distance.
The normal of the plane.
The "distance" of the plane.The distance is the dot product of the plane's normal and the point it was initialized with.