Former-commit-id: db5ae144a8eb8794e7df9981805d2250bbd8b4ee
New method Former-commit-id: 282a82d773f61fcec8026eb4ccb74e8b2de9784f
Former-commit-id: 3cbdbcc5dd8cc73b5efc40f62e3b6a9619f628cc
Class ray who represents a ray in space and who can be used as a line. Support of classical intersections. Former-commit-id: 2ea5af0cf749dbefdd841f9b02bfab2af5058cdb