View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0022805 | Community | OCCT:Data Exchange | public | 2011-11-11 13:55 | 2012-03-29 17:26 |
| Reporter | szy | Assigned To | bugmaster | ||
| Priority | normal | Severity | minor | ||
| Status | closed | Resolution | fixed | ||
| Platform | A | OS | L | ||
| Product Version | 6.5.2 | ||||
| Target Version | 6.5.3 | Fixed in Version | 6.5.3 | ||
| Summary | 0022805: Bug of STEP read /writer | ||||
| Description | Post from the Forum - http://www.opencascade.org/org/forum/thread_22164/. "After exporting a B-spline surface to STEP and importing it back to OCC, the surface is not displayed correctly in shaded mode (see image in the appendix). Wireframe mode is displayed correctly, also iso-lines can be shown, so the geometry is basically there, but shading fails. As far as I know such problems often point to some geometrical problems. The problem occurs only after the surface was sewed together with other surfaces to form a solid. However, according to DRAW's "checkshape" this solid is valid. Furthermore, the problem does not occur if the surface spans less than 360°. The problem occurs in OCC 6.5.1 as well as in OCC 6.3.1. Other versions, I dind't test. With other export formats (BREP, IGES, STL) there is no problem. I append some brep files: spiral_original_surface.brep the surface before sewing (no problem) spiral_solid.brep the sewed solid spiral_solid_face.brep the surface after sewing spiral_solid_359_degree the sewed solid spanning only 359 degree (no problem) " Bug is reproduced under OCCT6.5.2 also. Shape before export in step is valid, but after import becomes invalid. See below bug reproducer. | ||||
| Steps To Reproduce | > pload ALL > restore spiral_solid.brep s > checkshape s ## Ok > stepwrite 0 s s.stp > stepread s.stp r * > checkshape r_1 ## On Shape faulty_1 : ## BRepCheck_SelfIntersectingWire ## On Shape faulty_2 : ##BRepCheck_UnorientableShape ##Shape faulty_1 on shape faulty_2 : ##BRepCheck_SelfIntersectingWire ##Faulty shapes in variables faulty_1 to faulty_2 | ||||
| Additional information and documentation updates | Modified the process of translating edge loop from STEP file to OCC: if computation of 2D parameter of vertices on edge gives the same result, update range of edge isn't done. | ||||
| Tags | No tags attached. | ||||
| Test case number | chl 934 R7 | ||||
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Spiral.zip (329,099 bytes) |
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SVN branch http://svn/svn/occt/branches/OCC22805 (revision 10306) is ready to be reviewed. |
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Dear BugMaster, Workbench KAS:dev:apn-22805-occt was created from SVN branch http://svn/svn/occt/branches/OCC22805 (and apn-22805-products from trunk) and compiled on Linux and Windows platforms. There are not regressions in apn-22805-products regarding to KAS:dev:products-20120203-opt Test case for this fix is chl 934 R7. It's OK. See results in /QADisk/occttests/results/KAS/dev/ apn-22805-products_08022012/lin See reference results in /QADisk/occttests/results/KAS/dev/products-20120203-opt_03022012/lin See test cases in /QADisk/occttests/tests/ED |
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R7 (948 bytes) |
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Integrated into trunk of occt repository Date: 2012-02-10 14:09:30 +0400 (Fri, 10 Feb 2012) New Revision: 10410 Modified: trunk/src/StepToTopoDS/StepToTopoDS_TranslateEdgeLoop.cxx |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2011-11-11 13:55 | szy | New Issue | |
| 2011-11-11 13:55 | szy | Assigned To | => gka |
| 2011-11-11 13:55 | szy | File Added: Spiral.zip | |
| 2011-12-15 16:17 |
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Assigned To | gka => ama |
| 2011-12-15 16:17 |
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Status | new => assigned |
| 2012-02-03 18:55 |
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Note Added: 0019393 | |
| 2012-02-03 18:56 |
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Assigned To | ama => gka |
| 2012-02-03 18:56 |
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Status | assigned => resolved |
| 2012-02-06 12:10 |
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Assigned To | gka => ama |
| 2012-02-06 12:10 |
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Status | resolved => reviewed |
| 2012-02-08 12:40 | apn | Test case number | => chl 934 R7 |
| 2012-02-10 10:00 | apn | Note Added: 0019499 | |
| 2012-02-10 10:00 | apn | Note Edited: 0019499 | |
| 2012-02-10 10:01 | apn | File Added: R7 | |
| 2012-02-10 10:01 | apn | Status | reviewed => tested |
| 2012-02-10 14:27 | bugmaster | Note Added: 0019507 | |
| 2012-02-10 14:27 | bugmaster | Status | tested => verified |
| 2012-02-10 14:27 | bugmaster | Resolution | open => fixed |
| 2012-02-10 18:08 |
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Additional Information Updated | |
| 2012-02-10 18:10 |
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Additional Information Updated | |
| 2012-03-29 17:26 | bugmaster | Changeset attached | => occt master e65d641a |
