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Extension on the 3D Offset algorithm (Mode="Complete", Join Type = "Intersection") for colliding cases to add support for new configurations of the shapes. In the previous approach the result of the offset operation was build from the offset faces using MakerVolume algorithm, without checking of the validity of these faces. The new extension is based on this approach, but now the offset faces are being checked on invalidity and rebuild in case of any. This allows (in case of successful rebuilding) to avoid creation of the unforeseen parts such as dangling parts, spikes, inverted faces in the result of offset operation. The main criteria for the validity of the faces is the coincidence of the normal direction of the offset face with the normal direction of the original face. Check for removal of invalid faces has been removed as obsolete. BRepOffset_Inter2D: Avoid excess trimming of the edges due to coincidence with other edges. BRepOffset_Inter3D: Careful treatment of the intersection of the faces connected only through vertices. Eliminating the compiler warning. Small corrections of test cases for issue CR26917
101 lines
4.7 KiB
C++
101 lines
4.7 KiB
C++
// Created on: 1996-08-30
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// Created by: Yves FRICAUD
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// Copyright (c) 1996-1999 Matra Datavision
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// Copyright (c) 1999-2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef _BRepOffset_Inter2d_HeaderFile
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#define _BRepOffset_Inter2d_HeaderFile
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#include <Standard.hxx>
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#include <Standard_DefineAlloc.hxx>
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#include <Standard_Handle.hxx>
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#include <TopTools_IndexedMapOfShape.hxx>
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#include <Standard_Real.hxx>
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#include <TopTools_DataMapOfShapeShape.hxx>
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#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
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class BRepAlgo_AsDes;
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class TopoDS_Face;
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class BRepOffset_Offset;
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//! Computes the intersections betwwen edges on a face
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//! stores result is SD as AsDes from BRepOffset.
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class BRepOffset_Inter2d
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{
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public:
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DEFINE_STANDARD_ALLOC
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//! Computes the intersections between the edges stored
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//! is AsDes as descendants of <F> . Intersections is computed
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//! between two edges if one of them is bound in NewEdges.
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//! When all faces of the shape are treated the intersection
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//! vertices have to be fused using the FuseVertices method.
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//! theDMVV contains the vertices that should be fused
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Standard_EXPORT static void Compute (const Handle(BRepAlgo_AsDes)& AsDes,
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const TopoDS_Face& F,
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const TopTools_IndexedMapOfShape& NewEdges,
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const Standard_Real Tol,
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TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);
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//! Computes the intersection between the offset edges of the <FI>.
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//! All intersection vertices will be stored in AsDes2d.
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//! When all faces of the shape are treated the intersection vertices
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//! have to be fused using the FuseVertices method.
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//! theDMVV contains the vertices that should be fused.
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Standard_EXPORT static void ConnexIntByInt (const TopoDS_Face& FI,
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BRepOffset_Offset& OFI,
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TopTools_DataMapOfShapeShape& MES,
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const TopTools_DataMapOfShapeShape& Build,
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const Handle(BRepAlgo_AsDes)& AsDes2d,
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const Standard_Real Offset,
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const Standard_Real Tol,
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TopTools_IndexedMapOfShape& FacesWithVerts,
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TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);
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//! Computes the intersection between the offset edges generated
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//! from vertices and stored into AsDes as descendants of the <FI>.
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//! All intersection vertices will be stored in AsDes2d.
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//! When all faces of the shape are treated the intersection vertices
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//! have to be fused using the FuseVertices method.
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//! theDMVV contains the vertices that should be fused.
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Standard_EXPORT static void ConnexIntByIntInVert (const TopoDS_Face& FI,
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BRepOffset_Offset& OFI,
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TopTools_DataMapOfShapeShape& MES,
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const TopTools_DataMapOfShapeShape& Build,
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const Handle(BRepAlgo_AsDes)& AsDes,
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const Handle(BRepAlgo_AsDes)& AsDes2d,
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const Standard_Real Tol,
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TopTools_IndexedDataMapOfShapeListOfShape& theDMVV);
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//! Fuses the chains of vertices in the theDMVV
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//! and updates AsDes by replacing the old vertices
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//! with the new ones.
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Standard_EXPORT static void FuseVertices(const TopTools_IndexedDataMapOfShapeListOfShape& theDMVV,
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const Handle(BRepAlgo_AsDes)& theAsDes);
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//! extents the edge
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Standard_EXPORT static void ExtentEdge(const TopoDS_Edge& E,
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TopoDS_Edge& NE,
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const Standard_Real theOffset);
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protected:
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private:
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};
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#endif // _BRepOffset_Inter2d_HeaderFile
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