class HKalPlane: public TObject

 Creates a plane defined by a point on the plane and its normal vector.
 Hesse Normal Form: center * normal - d = 0
 center: a point on the plane.
 normal: normal vector of the plane.

 Creates a plane defined by two axis u and v on the plane defining its coordinate system
 and the origin of the plane's coordinate system.

 Calculates the distance of vector pos to the plane.

 Finds the intersection point of a straight line with this plane.
 pointIntersect: the intersection point (return value).
 t:              line parameter to reach the plane (return value)
 pos:            a point on the straight line.
 dir:            direction of the straight line.

 Checks if point is on the plane.

 Print center and normal vectors of this plane.
 opt: print options (not used)

 Calculates the distance of vector pos to the plane.
 The signed distance is positive if the origin of the coordinate system and the
 test point are on opposite sides of the plane and negative if they are on the same side.

 Transforms the plane using a rotation matrix.

 Set the plane using a point on the plane and the plane's normal vector.

 Sets the two axis u and v on the plane defining its coordinate system
 and the origin of the plane's coordinate system.