【转帖】mapping oddbarc to xy plane
 

mapping oddbarc to xy plane
mapping oddbarc to xy plane
i have an arc with a normal of (0, 0, -1). i want to map this arc to the xy plane. how can i do this?
note that in general case normal may be non-parallel to z axis.
2d entity's normal defines transformation between ocs (object coordinate system) and wcs (world coordinate system).
odgematrix3d:lanetoworld(odgevector3d normal) and
odgematrix3d::worldtoplane(odgevector3d normal)
construct transformation matrixes to convert between ocs and wcs.
sergey slezkin