Tue, 09/24/2013 - 09:02
Forums:
Hi All,
Attachment is a .brep file, and it contains only two faces. Try to stitch them using sew API (tol=0.01). After stitching, one edge's tolerance changed from 0.5 to 116. I have reproduced this problem in 6.3, 6.5.3 and 6.6.0. The raw two faces have no topological or geometrical error. I think I have reported the similar bugs two times ( including OCC MantisBT system), but on feedback at all. In fact, this .brep file is extracted from a large iges file, the stitching result is not good in raw file. Many topological or geometrical error happens after stitching.
Thanks.
Ding
Tue, 09/24/2013 - 15:34
Dear Cauchy Ding,
the reported case is recorded as an additional example in issue #24174
Regards...
Wed, 09/25/2013 - 04:57
OCC Supervisor,
Thanks.
Ding
Wed, 09/25/2013 - 07:43
Hi All,
I think it's caused by the 3d curve. The 3d curves of two edges have lots of control points. In fact, the pcurve of the edge on the face is degree=1 and contains only 2 control points, but after buildcurve3d, the 3d curve contains more than 100 control points and degree=14, it's so bad.
In fact, I have try to rebuild curve3d by reducing GeomAbs_C1 to GeomAbc_C0, change tol from 1.0e-5 to 1.0e-3, and changing maxDegree from 14 to 3. But the 3d curve still contains lots of control points.
I have attached the raw iges file.
Thanks.
Ding