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0027383: Modeling - improve handling of regularity on edges

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1. There has been implemented calculation of all possible types of continuity for shared edges:
  * G1 is set if tangential planes are the same for connected faces in each control points through the edge;
  * C1 is set in addition to G1 conditions if derivatives, orthogonal to the edge on each face, are equal vectors;
  * G2 is set in addition to G1 if the centers of principal curvatures are the same for connected faces in each control points through the edge;
  * C2 is set in addition to C1 and G2 if directions of principal curvatures are equal;
  * CN continuity is set only if both connected faces are based on elementary surfaces (the conditions for this case are similar to C2 continuity).

2. ShapeFix::EncodeRegularity() is merged into BRepLib::EncodeRegularity().
3. Implemented several test cases to check correct handling of regularity.
4. Fix incorrect usage of BRepLib::EncodeRegularity() in BRepBuilderAPI_Sewing.
5. Implement a method for calculation of regularity on the given list of edges.
6. Documentation updates
This commit is contained in:
azv
2016-11-15 12:17:45 +03:00
committed by apn
parent 4e1bc39a81
commit 712879c808
18 changed files with 39684 additions and 194 deletions
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34
src/ShapeFix/ShapeFix.cxx
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@@ -29,7 +29,6 @@
#include <Precision.hxx>
#include <Standard_ErrorHandler.hxx>
#include <Standard_Failure.hxx>
#include <TopExp_Explorer.hxx>
@@ -255,41 +254,10 @@ Standard_Boolean ShapeFix::SameParameter(const TopoDS_Shape& shape,
//purpose :
//=======================================================================
static void EncodeRegularity (const TopoDS_Shape& shape,
const Standard_Real tolang,
TopTools_MapOfShape &aMap)
{
TopoDS_Shape S = shape;
TopLoc_Location L;
S.Location ( L );
if ( ! aMap.Add ( S ) ) return;
if ( S.ShapeType() == TopAbs_COMPOUND ||
S.ShapeType() == TopAbs_COMPSOLID ) {
for ( TopoDS_Iterator it(S); it.More(); it.Next() ) {
EncodeRegularity ( it.Value(), tolang, aMap );
}
return;
}
try {
OCC_CATCH_SIGNALS
BRepLib::EncodeRegularity ( S, tolang );
}
catch(Standard_Failure) {
#ifdef OCCT_DEBUG
cout << "Warning: Exception in ShapeFix::EncodeRegularity(): ";
Standard_Failure::Caught()->Print ( cout );
cout << endl;
#endif
}
}
void ShapeFix::EncodeRegularity (const TopoDS_Shape& shape,
const Standard_Real tolang)
{
TopTools_MapOfShape aMap;
::EncodeRegularity ( shape, tolang, aMap );
BRepLib::EncodeRegularity(shape, tolang);
}