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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
224 lines
8.6 KiB
C++
224 lines
8.6 KiB
C++
// Created on: 1995-10-26
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// Created by: Yves FRICAUD
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// Copyright (c) 1995-1999 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_MakeOffset_HeaderFile
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#define _BRepOffset_MakeOffset_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 <Standard_Real.hxx>
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#include <TopoDS_Shape.hxx>
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#include <BRepOffset_Mode.hxx>
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#include <Standard_Boolean.hxx>
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#include <GeomAbs_JoinType.hxx>
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#include <TopTools_DataMapOfShapeReal.hxx>
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#include <TopTools_IndexedMapOfShape.hxx>
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#include <BRepOffset_Analyse.hxx>
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#include <BRepAlgo_Image.hxx>
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#include <TopTools_ListOfShape.hxx>
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#include <BRepOffset_Error.hxx>
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#include <BRepOffset_MakeLoops.hxx>
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#include <TopTools_MapOfShape.hxx>
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#include <BRepOffset_DataMapOfShapeOffset.hxx>
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class BRepAlgo_AsDes;
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class TopoDS_Shape;
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class TopoDS_Face;
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class BRepOffset_Analyse;
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class BRepAlgo_Image;
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class BRepOffset_Inter3d;
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class BRepOffset_MakeOffset
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{
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public:
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DEFINE_STANDARD_ALLOC
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Standard_EXPORT BRepOffset_MakeOffset();
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Standard_EXPORT BRepOffset_MakeOffset(const TopoDS_Shape& S,
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const Standard_Real Offset,
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const Standard_Real Tol,
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const BRepOffset_Mode Mode = BRepOffset_Skin,
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const Standard_Boolean Intersection = Standard_False,
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const Standard_Boolean SelfInter = Standard_False,
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const GeomAbs_JoinType Join = GeomAbs_Arc,
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const Standard_Boolean Thickening = Standard_False,
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const Standard_Boolean RemoveIntEdges = Standard_False);
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Standard_EXPORT void Initialize (const TopoDS_Shape& S,
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const Standard_Real Offset,
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const Standard_Real Tol,
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const BRepOffset_Mode Mode = BRepOffset_Skin,
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const Standard_Boolean Intersection = Standard_False,
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const Standard_Boolean SelfInter = Standard_False,
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const GeomAbs_JoinType Join = GeomAbs_Arc,
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const Standard_Boolean Thickening = Standard_False,
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const Standard_Boolean RemoveIntEdges = Standard_False);
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Standard_EXPORT void Clear();
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//! Add Closing Faces, <F> has to be in the initial
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//! shape S.
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Standard_EXPORT void AddFace (const TopoDS_Face& F);
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//! set the offset <Off> on the Face <F>
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Standard_EXPORT void SetOffsetOnFace (const TopoDS_Face& F, const Standard_Real Off);
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Standard_EXPORT void MakeOffsetShape();
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Standard_EXPORT void MakeThickSolid();
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Standard_EXPORT const BRepOffset_Analyse& GetAnalyse() const;
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Standard_EXPORT Standard_Boolean IsDone() const;
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Standard_EXPORT const TopoDS_Shape& Shape() const;
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//! returns information about offset state.
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Standard_EXPORT BRepOffset_Error Error() const;
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//! Returns <Image> containing links between initials
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//! shapes and offset faces.
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Standard_EXPORT const BRepAlgo_Image& OffsetFacesFromShapes() const;
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//! Returns myJoin.
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Standard_EXPORT GeomAbs_JoinType GetJoinType() const;
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//! Returns <Image> containing links between initials
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//! shapes and offset edges.
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Standard_EXPORT const BRepAlgo_Image& OffsetEdgesFromShapes() const;
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//! Returns the list of closing faces stores by AddFace
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Standard_EXPORT const TopTools_IndexedMapOfShape& ClosingFaces() const;
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//! Makes pre analysis of possibility offset perform. Use method Error() to get more information.
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//! Finds first error. List of checks:
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//! 1) Check for existence object with non-null offset.
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//! 2) Check for connectivity in offset shell.
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//! 3) Check continuity of input surfaces.
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//! 4) Check for normals existence on grid.
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//! @return True if possible make computations and false otherwise.
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Standard_EXPORT Standard_Boolean CheckInputData();
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//! Return bad shape, which obtained in CheckInputData.
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Standard_EXPORT const TopoDS_Shape& GetBadShape() const;
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protected:
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private:
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Standard_EXPORT void BuildOffsetByArc();
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Standard_EXPORT void BuildOffsetByInter();
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//! Make Offset faces
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Standard_EXPORT void MakeOffsetFaces(BRepOffset_DataMapOfShapeOffset& theMapSF);
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Standard_EXPORT void SelfInter (TopTools_MapOfShape& Modif);
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Standard_EXPORT void Intersection3D (BRepOffset_Inter3d& Inter);
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Standard_EXPORT void Intersection2D (const TopTools_IndexedMapOfShape& Modif, const TopTools_IndexedMapOfShape& NewEdges);
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Standard_EXPORT void MakeLoops (TopTools_IndexedMapOfShape& Modif);
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Standard_EXPORT void MakeLoopsOnContext (TopTools_MapOfShape& Modif);
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Standard_EXPORT void MakeFaces (TopTools_IndexedMapOfShape& Modif);
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Standard_EXPORT void MakeShells();
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Standard_EXPORT void SelectShells();
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Standard_EXPORT void EncodeRegularity();
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Standard_EXPORT void MakeSolid();
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Standard_EXPORT void ToContext (BRepOffset_DataMapOfShapeOffset& MapSF);
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//! Private method use to update the map face<->offset
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Standard_EXPORT void UpdateFaceOffset();
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//! Private method used to correct degenerated edges on conical faces
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Standard_EXPORT void CorrectConicalFaces();
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//! Private method used to build walls for thickening the shell
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Standard_EXPORT void MakeMissingWalls();
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//! Removes INTERNAL edges from the result
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Standard_EXPORT void RemoveInternalEdges();
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//! Intersects edges
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Standard_EXPORT void IntersectEdges (const TopoDS_Shape& theShape,
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BRepOffset_DataMapOfShapeOffset& theMapSF,
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TopTools_DataMapOfShapeShape& theMES,
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TopTools_DataMapOfShapeShape& theBuild,
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Handle(BRepAlgo_AsDes)& theAsDes,
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Handle(BRepAlgo_AsDes)& theAsDes2d);
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//! Building of the splits of the offset faces for mode Complete
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//! and joint type Intersection. This method is an advanced alternative
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//! for BRepOffset_MakeLoops::Build method.
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//! Currently the Complete intersection mode is limited to work only on planar cases.
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Standard_EXPORT void BuildSplitsOfExtendedFaces(const TopTools_ListOfShape& theLF,
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Handle(BRepAlgo_AsDes)& theAsDes,
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TopTools_DataMapOfShapeListOfShape& theEdgesOrigins,
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TopTools_DataMapOfShapeShape& theFacesOrigins,
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TopTools_DataMapOfShapeShape& theETrimEInf,
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BRepAlgo_Image& theImage);
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//! Building of the splits of the already trimmed offset faces for mode Complete
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//! and joint type Intersection.
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Standard_EXPORT void BuildSplitsOfTrimmedFaces(const TopTools_ListOfShape& theLF,
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Handle(BRepAlgo_AsDes)& theAsDes,
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BRepAlgo_Image& theImage);
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Standard_Real myOffset;
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Standard_Real myTol;
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TopoDS_Shape myShape;
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BRepOffset_Mode myMode;
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Standard_Boolean myInter;
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Standard_Boolean mySelfInter;
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GeomAbs_JoinType myJoin;
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Standard_Boolean myThickening;
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Standard_Boolean myRemoveIntEdges;
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TopTools_DataMapOfShapeReal myFaceOffset;
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TopTools_IndexedMapOfShape myFaces;
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BRepOffset_Analyse myAnalyse;
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TopoDS_Shape myOffsetShape;
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BRepAlgo_Image myInitOffsetFace;
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BRepAlgo_Image myInitOffsetEdge;
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BRepAlgo_Image myImageOffset;
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TopTools_ListOfShape myWalls;
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Handle(BRepAlgo_AsDes) myAsDes;
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Standard_Boolean myDone;
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BRepOffset_Error myError;
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BRepOffset_MakeLoops myMakeLoops;
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Standard_Boolean myIsPerformSewing; // Handle bad walls in thicksolid mode.
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Standard_Boolean myIsPlanar;
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TopoDS_Shape myBadShape;
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};
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#endif // _BRepOffset_MakeOffset_HeaderFile
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