JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. DPoint3d This is the origin of each DTransform3d. It is the startPoint of linear Geometry Such as Direction, Polygon. Lines for no reason give DPoint3d at the midpoint. Arcs, EllipticalArcs, and Circles have the DPoint3d is given as the origin. Parent topic: DGeometry Properties