Plane Struct  

Normal vector of the plane.

Distance from the origin to the plane.

Creates a plane.

Sets a plane using a point that lies within it plus a normal to orient it (note that the normal must be a normalised vector).

Sets a plane using three points that lie within it. The points go around clockwise as you look down on the top surface of the plane.

Distance from plane to point.

Is a point on the positive side of the plane?

Are two points on the same side of the plane?

Intersects a ray with the plane.