【转帖】polyline,2dpolyline
 

polyline,2dpolyline
polyline,2dpolyline
hi,
what is the difference between polyline , 2dpolyline and lwpolyline?could you please guide me and point out where can i find this?
please help me with this.
thanks,
singh
if you mean database entities where are:
oddb2dpolyline, oddb3dpolyline. these polylines store their vertices as subentities (oddb2dvertex and oddb3dpolylinevertex). they are saved to dxf file as polyline.
in r13 new polyline entity (oddbpolyline) was introduced with vertex coordinates stored inside it (opposite to polylines mentioned above). it is saved to dxf as lwpolyline (light weight polyline). this is more compact form for representing 2d polyline but with some limitations: it can't be curve or spline fitted and extended data can't be attached to individual vertex (because vertex is not a separate entity).
sergey slezkin
quote:
originally posted by sergey slezkin
if you mean database entities where are:
oddb2dpolyline, oddb3dpolyline. these polylines store their vertices as subentities (oddb2dvertex and oddb3dpolylinevertex). they are saved to dxf file as polyline.
in r13 new polyline entity (oddbpolyline) was introduced with vertex coordinates stored inside it (opposite to polylines mentioned above). it is saved to dxf as lwpolyline (light weight polyline). this is more compact form for representing 2d polyline but with some limitations: it can't be curve or spline fitted and extended data can't be attached to individual vertex (because vertex is not a separate entity).
understood.thanks for your reply,
singhn