View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0005698 | Open CASCADE | OCCT:Modeling Data | public | 2004-04-14 16:42 | 2006-06-29 09:15 |
| Reporter | Assigned To | ||||
| Priority | normal | Severity | trivial | ||
| Status | acknowledged | Resolution | suspended | ||
| OS | All | ||||
| Summary | 0005698: Inaccurate result of D0 method in BRepAdaptor_CompCurve | ||||
| Description | To reproduce a bug it is needed to create an object of type BRepAdaptor_CompCurve parameterised by curvulinear abscissa. E.g., consider the following source code of a Draw command: //---------------------------------------------------------- static int mytest(Draw_Interpretor& di, int n, char** a) { if (n < 2) { cout<<"missing parameter - wire"<<endl; return 1; } TopoDS_Shape shape = DBRep::Get(a[1],TopAbs_WIRE); if (shape.IsNull()) return 1; TopoDS_Wire wire = TopoDS::Wire(shape); // create curve parameterised by curvilinear distance BRepAdaptor_CompCurve curve(wire,Standard_True); double length = curve.LastParameter(); double need_length = length/2; gp_Pnt pnt; curve.D0(need_length,pnt); // create check_curve parameterised in a general way BRepAdaptor_CompCurve check_curve(wire); double check_par = GCPnts_AbscissaPoint(check_curve, need_length, 0).Parameter(); gp_Pnt check_pnt; check_curve.D0(check_par,check_pnt); // check that points are coinsiding double error_dist = pnt.Distance(check_pnt); if (error_dist > Precision::Confusion()) { cout.precision(3); cout<<"error_dist="<<error_dist<< " ("<<error_dist/need_length*100<<"%)"<<endl; return 1; } return 0; } //---------------------------------------------------------- Run it with the attached shape (wire.brep) as argument. Normally it must return the code 0 with no output, but this command in the current version of OCCT returns the code 1 and gives the following output: error_dist=25.5 (1.64%) The cause of the bug is in linear interpolation of parameters on edges made in the method Prepare(). | ||||
| Tags | No tags attached. | ||||
| Test case number | |||||
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2004-08-03 18:10 | bugmaster | Product Version | 5.1.2 => dev |
| 2004-08-03 18:10 | bugmaster | Assigned To | bugmaster => mkk |
| 2004-08-03 18:10 | bugmaster | Status | new => assigned |
| 2004-08-04 09:47 | bugmaster | Status | assigned => closed |
| 2004-08-04 09:47 | bugmaster | Resolution | @0@ => suspended |
| 2004-08-04 09:47 | bugmaster | validate | => 1 |
| 2011-08-02 11:32 | bugmaster | Category | OCCT:MOD => OCCT:Modeling Data |
