View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0025264 | Community | OCCT:Mesh | public | 2014-09-23 14:35 | 2016-12-09 16:39 |
| Reporter | eryar | Assigned To | apn | ||
| Priority | normal | Severity | minor | ||
| Status | closed | Resolution | fixed | ||
| Platform | Windows | OS | VC++ 2008 | ||
| Product Version | 6.7.1 | ||||
| Target Version | 7.1.0 | Fixed in Version | 7.1.0 | ||
| Summary | 0025264: Mesh very slow for Revol shape | ||||
| Description | Mesh algorithm very slow for a revol shape in occ6.7, while in occ6.2.0 is very fast. PS: The deflection of the BRepMesh::Mesh only have the effect for sphere; other shapes or surfaces have no effect. | ||||
| Tags | No tags attached. | ||||
| Test case number | bugs mesh bug25264 | ||||
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mesh_revol.PNG (30,656 bytes) |
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wire.brep (1,475 bytes) |
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revol.tcl (400 bytes) |
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Branch CR25264 has been created by oan. SHA-1: 4bbba407a83264ae4b34853c1a88b2876120e119 Detailed log of new commits: Author: oan Date: Mon Feb 8 15:51:59 2016 +0300 0025264: Mesh very slow for Revol shape Test case added |
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Dear Mikhail, on current master meshing of the problematic shape takes about 2 seconds instead of 52 seconds mentioned in the bug. Difference between OCCT version 6.2 is due to changed meshing algorithm. Test case has been pushed to branch CR25264. Please review. |
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Reviewed. |
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Oleg, the problem does exist: I have tried with OCCT 6.0, and it takes 0.2 sec, while on current master it works ~ 13 sec. Note that it is not correct to rely on time of vdisplay command, as it may use different parameters in different versions. Use incmesh command instead: tclean result; chrono s reset; chrono s start; incmesh result 0.1; chrono s show For me, it takes 0.05 sec (33 K triangles) in OCCT 6.0 and 2.5 sec (31 K triangles) in master. For tolerance 0.001, it works 2.3 sec in OCCT 6.0, and 112 sec in master. As we see, slow down is ~ 50 times regardless of deflection (and corresponding number of elements), and I believe that difference of the algorithm should not be blamed without in-depth analysis. |
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More timings, incmesh with deflection 0.1: OCCT 6.0.0: 0.05 sec, 33030 triangles OCCT 6.3.1: 14.4 sec, 32480 triangles OCCT 6.5.0: 2.25 sec, 32624 triangles OCCT 6.6.0: 2.37 sec, 31208 triangles OCCT 6.7.0: 2.21 sec, 31208 triangles OCCT 6.8.0: 1.9 sec, 31208 triangles OCCT 6.9.0: 2.02 sec, 31090 triangles OCCT 6.9.1: 2.01 sec, 31090 triangles master : 2.02 sec, 31090 triangles |
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Branch CR25264_1 has been created by oan. SHA-1: 9c651b4d32e64d4fcfef1e086018781035743c98 Detailed log of new commits: Author: oan Date: Mon Oct 17 12:21:25 2016 +0300 0025264: Mesh very slow for Revol shape Test case added |
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Dear Bugmaster, behaviour of BRepMesh component has been improved for case of thin cylindrical surfaces in context of #27442 issue. The following timings used in test suites are produced on current master: CPU user time: 0.0468003 sec for reference case CPU user time: 0.0468003 sec for problematic case Test case for current issue has been created and pushed to branch CR25264_1. Please test and close the issue. Best regards. |
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Branch CR25264_1 has been updated by apn. SHA-1: 9bc559e702a0a9e7025881c17b09a8de5b0ca574 Detailed log of new commits: Author: apn Date: Tue Oct 25 20:01:42 2016 +0300 Small corrections of test case |
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Test case: bugs mesh bug25264 - OK |
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Branch CR25264_1 has been deleted by kgv. SHA-1: 9bc559e702a0a9e7025881c17b09a8de5b0ca574 |
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Branch CR25264 has been deleted by kgv. SHA-1: 4bbba407a83264ae4b34853c1a88b2876120e119 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-09-23 14:35 | eryar | New Issue | |
| 2014-09-23 14:35 | eryar | Assigned To | => oan |
| 2014-09-23 14:35 | eryar | File Added: mesh_revol.PNG | |
| 2014-09-23 14:35 | eryar | File Added: wire.brep | |
| 2014-09-23 14:36 | eryar | File Added: revol.tcl | |
| 2016-02-08 15:52 | git | Note Added: 0050486 | |
| 2016-02-08 15:55 | oan | Assigned To | oan => msv |
| 2016-02-08 15:55 | oan | Status | new => resolved |
| 2016-02-08 15:55 | oan | Steps to Reproduce Updated | |
| 2016-02-08 15:55 | oan | Steps to Reproduce Updated | |
| 2016-02-08 15:56 | oan | Note Added: 0050487 | |
| 2016-02-08 16:10 | msv | Note Added: 0050489 | |
| 2016-02-08 16:10 | msv | Assigned To | msv => bugmaster |
| 2016-02-08 16:10 | msv | Status | resolved => reviewed |
| 2016-02-08 17:05 |
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Assigned To | bugmaster => apv |
| 2016-02-08 19:52 | abv | Note Added: 0050503 | |
| 2016-02-08 19:52 | abv | Assigned To | apv => oan |
| 2016-02-08 19:52 | abv | Status | reviewed => assigned |
| 2016-02-08 19:52 | abv | Target Version | => 7.1.0 |
| 2016-02-09 11:14 | abv | Note Added: 0050513 | |
| 2016-10-17 12:21 | git | Note Added: 0058773 | |
| 2016-10-17 12:27 | oan | Note Added: 0058774 | |
| 2016-10-17 12:28 | oan | Assigned To | oan => bugmaster |
| 2016-10-17 12:28 | oan | Status | assigned => feedback |
| 2016-10-25 20:02 | git | Note Added: 0059119 | |
| 2016-10-25 20:09 | apn | Note Added: 0059120 | |
| 2016-10-25 20:10 | apn | Test case number | => bugs mesh bug25264 |
| 2016-10-25 20:10 | apn | Status | feedback => tested |
| 2016-10-28 14:35 | apn | Changeset attached | => occt master f204ec4c |
| 2016-10-28 14:35 | apn | Assigned To | bugmaster => apn |
| 2016-10-28 14:35 | apn | Status | tested => verified |
| 2016-10-28 14:35 | apn | Resolution | open => fixed |
| 2016-10-28 21:37 | git | Note Added: 0059397 | |
| 2016-10-28 21:51 | git | Note Added: 0059598 | |
| 2016-12-09 16:30 |
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Status | verified => closed |
| 2016-12-09 16:39 |
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Fixed in Version | => 7.1.0 |
