View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0025587 | Community | OCCT:Mesh | public | 2014-12-10 15:27 | 2020-08-28 15:47 |
| Reporter | Vico Liang | Assigned To | oan | ||
| Priority | normal | Severity | just a question | ||
| Status | assigned | Resolution | no change required | ||
| Platform | Windows | OS | VC++ 2013 | ||
| Target Version | Unscheduled | ||||
| Summary | 0025587: Mesh - Meshing algorithm doesn't consider isolated vertices inside face. | ||||
| Description | A face with isolated vertices which don't have edges connected to it will be ignored by meshing algorithm. The generated mesh won't pass the isolated vertices. | ||||
| Tags | No tags attached. | ||||
| Test case number | |||||
| related to | 0025601 | assigned | General Fuse fails on a Face and a Vertex on it. |
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Vertex_Inside_Face_Mesh.png (10,732 bytes) |
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Vertex_Inside_Face.brep (1,132 bytes) |
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Vertex_Inside_Face.png (6,454 bytes) |
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Dear Vico, BRepMesh implements support for internal vertices of face. However, model in attachments does not contain internal vertices, it is compound of two distinct shapes, face and vertex which have no relation to each other. |
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Dear OAN, You're right, The shape is a compound and the vertex is not actually part of the face. So it seems not the mesh issue. But the shape is generated by general fuse BOA algorithm, it must be an issue of the BOA algorithm. I will report a new bug about BOA. |
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Dear Bugmaster, please close the issue. |
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box_cone_fuse_mesh.png (9,034 bytes) |
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Dear OAN, Please help to look at the Box and Cone cases, it seems the vertex is in the face in this case. |
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box_cone_fuse.brep (44,316 bytes) |
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Please postpone closing this, it seems the mesh for vertex in face has issue. |
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Dear Vico, to use internal vertex as a mesh node BRepMesh should know about its position in parametric space of a face. For that, each internal vertex supposed to be used in mesh should have PointOnSurface representation. BRepMesh does not use any projection tool to force addition of internal vertices without such information. |
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Dear OAN, From your description above, the vertex in the face is missing parametric infomation PointOnSurface. So this should be a bug of general fuse algorithm. Because the shape is generated by general fuse algorithm, it's not from any projection tool to force addition of such internal vertiecs. |
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Dear Vico, In my opinion it is not a bug, because from point of view of BRepMesh internal vertices are supposed as a secondary information that represents specific user data which may vary depending on many factors and purposes. Nevertheless, I suggest you to ask the details in context of 0025601 issue or register new one. With best regards, Oleg |
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Dean OAN, From my point of view, Internal vertices of Face is not just a secondary infomation that presents specific user data. It's a necessary topology element to construct nonmanifold models. I still insist that mesh algorithm should consider any internal vertices even if the internal vertices don't have PointOnSurface parameter infomation. There has algorithm to project a point on the face to get the parameters on it. Best Regards, Vico |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2014-12-10 15:27 | Vico Liang | New Issue | |
| 2014-12-10 15:27 | Vico Liang | Assigned To | => oan |
| 2014-12-10 15:27 | Vico Liang | File Added: Vertex_Inside_Face_Mesh.png | |
| 2014-12-10 15:29 | Vico Liang | File Added: Vertex_Inside_Face.brep | |
| 2014-12-10 15:30 | Vico Liang | File Added: Vertex_Inside_Face.png | |
| 2014-12-11 13:40 | oan | Note Added: 0035330 | |
| 2014-12-11 13:40 | oan | Assigned To | oan => Vico Liang |
| 2014-12-11 13:40 | oan | Status | new => feedback |
| 2014-12-12 11:53 | Vico Liang | Note Added: 0035352 | |
| 2014-12-12 11:59 | oan | Severity | major => just a question |
| 2014-12-12 12:04 | oan | Assigned To | Vico Liang => bugmaster |
| 2014-12-12 12:04 | oan | Status | feedback => assigned |
| 2014-12-12 12:04 | oan | Resolution | open => no change required |
| 2014-12-12 12:04 | oan | Note Added: 0035353 | |
| 2014-12-12 15:34 | Vico Liang | Relationship added | related to 0025601 |
| 2014-12-12 15:44 | Vico Liang | File Added: box.brep | |
| 2014-12-12 15:44 | Vico Liang | File Added: cone.brep | |
| 2014-12-12 15:45 | Vico Liang | File Added: box_cone_fuse_mesh.png | |
| 2014-12-12 15:47 | Vico Liang | Note Added: 0035367 | |
| 2014-12-12 15:47 | Vico Liang | File Added: box_cone_fuse.brep | |
| 2014-12-12 15:49 | Vico Liang | Note Added: 0035368 | |
| 2014-12-12 16:03 | Vico Liang | File Deleted: box.brep | |
| 2014-12-12 16:04 | Vico Liang | File Deleted: cone.brep | |
| 2014-12-12 16:56 | Vico Liang | Assigned To | bugmaster => oan |
| 2014-12-12 18:39 | oan | Note Added: 0035381 | |
| 2014-12-12 18:49 | oan | Assigned To | oan => Vico Liang |
| 2014-12-12 18:49 | oan | Status | assigned => feedback |
| 2014-12-13 03:57 | Vico Liang | Note Added: 0035386 | |
| 2014-12-15 11:42 | oan | Note Added: 0035401 | |
| 2015-01-01 09:04 | Vico Liang | Note Added: 0035915 | |
| 2015-01-01 09:04 | Vico Liang | Assigned To | Vico Liang => oan |
| 2015-04-30 10:09 |
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Target Version | 6.9.0 => 7.1.0 |
| 2016-04-20 15:38 | Vico Liang | Status | feedback => assigned |
| 2016-10-26 18:10 | oan | Target Version | 7.1.0 => 7.2.0 |
| 2017-07-20 12:43 | oan | Target Version | 7.2.0 => 7.3.0 |
| 2018-02-25 21:09 |
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Target Version | 7.3.0 => 7.4.0 |
| 2019-09-04 17:55 | kgv | Summary | Meshing algorithm doesn't consider isolated vertices inside face. => Mesh - Meshing algorithm doesn't consider isolated vertices inside face. |
| 2019-09-06 16:16 | oan | Target Version | 7.4.0 => 7.5.0 |
| 2020-08-28 15:47 | oan | Target Version | 7.5.0 => Unscheduled |
