The PointOnPlane constraint constraints a point (defined by the origin of a coordinate frame) to lie in a plane (defined by the origin of another coordinate frame and normal vector).
The constraint equation is:
where g_1 and p_1 are the transformation of the frame defining the plane and its origin, p_2 is the point being constrained, and norm is the normal vector of the plane expressed in the local coordinates of g_1.
By defining two of PointOnPlane constraints with normal plane, you can constrain a point to a line. With three constraints, you can constraint a point to another point.
Examples
pccd.py, pypccd.py, radial.py
Create a new constraint to force the origin of point_frame to lie in a plane. The plane is coincident with the origin of plane_frame and normal to the vector plane_normal. The normal is expresed in the coordinates of plane_frame.
This is the coordinate frame the defines the plane.
(read-only)
This is the normal of the plane expressed in plane_frame coordinates.
This is the coordinate frame that defines the point to be constrained.