0022592: Data Exchange - Corrected processing of parameter read.iges.bspline.continuity

ID	Project	Category	View Status	Date Submitted	Last Update

0022592	Community	OCCT:Data Exchange	public	2011-06-10 16:24	2019-12-17 13:25

Reporter	~~szy~~	Assigned To	~~gka~~
Priority	normal	Severity	feature
Status	assigned	Resolution	reopened
OS	All

Summary	0022592: Data Exchange - Corrected processing of parameter read.iges.bspline.continuity
Description	RLN_fix405 (contribution). - Summary: Corrected processing of parameter read.iges.bspline.continuity set to 0 - Detailed description: When read.iges.bspline.continuity set to 0 (with Interface_Static::SetCVal()), the BSplineSurface is not enforced to become periodic if it is closed what is done when it's set to 1. In some cases (e.g. www.firstcadlibrary.com/seatmotor2.igs, entity 397) this leads to wrong resulting shape after Shape Healing. Instead of added missing seam the face is split into a compound of 2 invalid faces. NOTE: See comments in the code, for consistency between TransferSplineSurface() and TransferBSplineSurface() the former must have a code to convert to periodic surfaces, and the latter - to IGESConvGeom for enforcing continuity. It appeared that OCC IGES converter never enforced surface continuity though it was expected to. It is up to the OCC team to verify if addition of these calls will not break regressions. ==================================================== Branch OCC22592_IgestobrepSurfaceContinuity is created.
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Test case number

Date Modified	Username	Field	Change
2011-08-02 11:12	bugmaster	Category	OCCT:DTE => OCCT:Data Exchange
2011-11-24 15:50	~~szy~~	Assigned To	bugmaster => pdn
2011-11-24 15:50	~~szy~~	Status	acknowledged => assigned
2011-11-24 15:50	~~szy~~	Resolution	suspended => reopened
2011-11-24 15:50	~~szy~~	Fixed in Version	EMPTY =>
2011-11-24 15:50	~~szy~~	Description Updated
2019-12-11 15:29	~~pdn~~	Assigned To	pdn => gka
2019-12-17 12:08	kgv	Summary	Corrected processing of parameter read.iges.bspline.continuity => Data Exchange - Corrected processing of parameter read.iges.bspline.continuity
2019-12-17 13:25	kgv	Note Added: 0089597

kgv 2019-12-17 13:25 developer ~0089597	> Branch OCC22592_IgestobrepSurfaceContinuity is created. Note that referred branch has been lost (probably it is in SVN).