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| ID | Project | Category | View Status | Date Submitted | Last Update |
| 0030836 | Community | [OCCT] OCCT:Modeling Algorithms | public | 2019-07-10 14:55 | 2020-09-15 17:19 |
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| Reporter | Matthias | |
| Assigned To | bugmaster | |
| Priority | normal | Severity | minor | |
| Status | new | Resolution | open | |
| Platform | Windows | OS | VC++ 2015 | OS Version | 64 bit |
| Product Version | [OCCT] 7.3.0 | |
| Target Version | [OCCT] 7.6.0* | Fixed in Version | | |
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| Summary | 0030836: Modeling Algorithms - BRepFilletAPI_MakeFillet produces degenerated fillet in specific example |
| Description | See steps to reproduce.
With orig_faulty.brep the produced fillet is degenerated (see attached fillet_faulty_png).
With orig_okay.brep the produced fillet seems to be okay (see attached fillet_okay_png).
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| Steps To Reproduce | in DRAW:
degenerated fillet:
restore orig_faulty.brep o1
explode o1 E
blend r1 o1 2 o1_6
vdisplay r1
fillet okay:
restore orig_okay.brep o2
explode o2 E
blend r2 o2 2 o2_6
vdisplay r2
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Additional information
and documentation updates | With explode o1 F the face o1_2 is a surface of revolution primarily, build from a Bezier-Curve.
In case of orig_faulty.brep the first and second control-point of this Bezier-curve (at the large radius of the surface) are very near to each other.
In case of orig_okay.brep these control_points were moved away from each other.
From my understanding, the surface o1_2 has to be enlarged to create a fillet. In case of orig_faulty.brep the enlargement of the surface seems to be inappropriate for the fillet creation due to the distribution of the control-points (see also surface_iso_line_distribution.png). |
| Tags | No tags attached. |
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| Test case number | |
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| Attached Files |  fillet_faulty.png (133,817 bytes) 2019-07-10 14:55
fillet_okay.png (125,793 bytes) 2019-07-10 14:55
 orig_faulty.brep (272,940 bytes) 2019-07-10 15:00
orig_okay.brep (264,505 bytes) 2019-07-10 15:00
surface_iso_line_distribution.png (104,195 bytes) 2019-07-12 10:10 |
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Relationships 
Notes 