yang686526

control points of splines
control points of splines
hi, some problems were caught in this file(as in attatchment). there are 11 splines in the model space. when i read the control points fff"> of those splines, the results are not same as they are showing in autocad r2004.
could you please tell me how can i get the right ones?
thanks
vintonzhang
quote:
originally posted by ziyueban
hi, some problems were caught in this file(as in attatchment). there are 11 splines in the model space. when i read the control points fff"> of those splines, the results are not same as they are showing in autocad r2004.
autocad uses quite sophisticated algorithm to calculate spline's nurbs data when fit tolerance is non-zero - we don't know it yet. btw, i can't see attached file.
sincerely yours,
george udov
the file is here
sorry, the file is here.
many thanks!!!
attached files (238.0 kb, 7 views)


control points are computed incorrectly in this file because start and end tangents of some splines(f.e. one with handle 1dc8) aren't unit-length. this is defect of dwgdirect (we should normalize tangents when reading dwg), it is fixed, fix will be available in next release.
sincerely yours,
george udov