Projecting a Lattice of Points

Project a set of 3D points to a target:
• The center is .
• The line is , , , which joins the origin to the center.
• The plane is , so that , , are the intercepts.

Or project points in the plane:
• The center is .
• The line is , double-intercept form.
• The plane is the plane, in which case the projection is the identity.