View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0032836 | Community | OCCT:Data Exchange | public | 2022-02-16 10:01 | 2023-08-04 11:00 |
| Reporter | xuzhongxing | Assigned To | |||
| Priority | normal | Severity | major | ||
| Status | new | Resolution | open | ||
| Platform | Linux | OS | Debian 6.0 | ||
| Product Version | 7.6.0 | ||||
| Summary | 0032836: Mesh - the model has incomplete visualization compared to ACIS kernel | ||||
| Description | Import and mesh the STEP model with OCCT BRepMesh_IncrementalMesh. It has incomplete visualization compared with other CAD kernel, e.g., ACIS. I tested with 3 mthods: my own code, FreeCAD, and Mayo. All give the same defect.
13:29 ... Step File Reading : 'dwojnog ris.stp' ... STEP File Read ...
... Step File loaded ...
92738 records (entities,sub-lists,scopes), 265221 parameters ... Parameters prepared ...
... Objects analysed ...
STEP Loading done : 59625 Entities
13:29 Count STEP Reader Warnings for 'dwojnog ris.stp'
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4 W:(NAMED_UNIT,PLANE_ANGLE_UNIT,SI_UNIT): Parameter n0.1 (dimensions) not Derived
4 W:(NAMED_UNIT,SI_UNIT,SOLID_ANGLE_UNIT): Parameter n0.1 (dimensions) not Derived
4 W:(LENGTH_UNIT,NAMED_UNIT,SI_UNIT): Parameter n0.1 (dimensions) not Derived
Nb Total:12 for 3 items
13:29 Count STEP Translator Warnings for 'dwojnog ris.stp'
----- -----------
147 W:FACE_SURFACE: Missing seam-edge added
31 W:CLOSED_SHELL: Improperly connected shell split into parts
202 W:EDGE_LOOP: Edges were intersecting, corrected
1 W:(BOUNDED_SURFACE,B_SPLINE_SURFACE,B_SPLINE_SURFACE_WITH_KNOTS,GEOMETRIC_REPRESENTATION_ITEM,RATIONAL_B_SPLINE_SURFACE,REPRESENTATION_ITEM,SURFACE): Surface forced to be periodic
12 W:B_SPLINE_SURFACE_WITH_KNOTS: Surface forced to be periodic
Nb Total:393 for 5 items
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| Tags | No tags attached. | ||||
| Test case number | |||||
| related to | 0032496 | new | Data Exchange - STEP surface_of_revolution does not display |
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occt.png (54,916 bytes) acis.png (173,387 bytes) dwojnog ris.zip (734,148 bytes) |
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It doesn't look like a meshing issue to me - more like an invalid STEP definition or some issue in OCCT STEP translator / shape healing. |
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Possible related issue: https://tracker.dev.opencascade.org/view.php?id=32496 |
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If the part is isolated, then the meshing is correct. Attached is the isolated part. dwojnog ris_simplified.zip (663,365 bytes) |
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Attached is the screenshot of the meshing of the isolated part, which is correct. Screenshot 2023-08-04 155603.png (90,863 bytes) |
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It looks like the adjacent part interfered with the meshing of the helical part. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2022-02-16 10:01 | xuzhongxing | New Issue | |
| 2022-02-16 10:01 | xuzhongxing | Assigned To | => oan |
| 2022-02-16 10:03 | xuzhongxing | Note Added: 0106915 | |
| 2022-02-16 10:03 | xuzhongxing | File Added: occt.png | |
| 2022-02-16 10:03 | xuzhongxing | File Added: acis.png | |
| 2022-02-16 10:03 | xuzhongxing | File Added: dwojnog ris.zip | |
| 2022-02-16 13:28 | kgv | Summary | This model has incomplete visualization compared to ACIS kernel => Mesh - the model has incomplete visualization compared to ACIS kernel |
| 2022-02-16 13:31 | kgv | Description Updated | |
| 2022-02-16 13:33 | kgv | Note Added: 0106926 | |
| 2022-02-16 13:33 | kgv | Note Edited: 0106926 | |
| 2022-03-08 07:53 | xuzhongxing | Note Added: 0107237 | |
| 2022-03-08 11:07 | kgv | Relationship added | related to 0032496 |
| 2022-10-19 00:37 | oan | Assigned To | oan => gka |
| 2022-10-19 00:37 | oan | Category | OCCT:Mesh => OCCT:Data Exchange |
| 2023-08-04 10:55 | xuzhongxing | Note Added: 0113871 | |
| 2023-08-04 10:55 | xuzhongxing | File Added: dwojnog ris_simplified.zip | |
| 2023-08-04 10:56 | xuzhongxing | Note Added: 0113872 | |
| 2023-08-04 10:56 | xuzhongxing | File Added: Screenshot 2023-08-04 155603.png | |
| 2023-08-04 11:00 | xuzhongxing | Note Added: 0113873 |
