191 lines
8.2 KiB
C++
191 lines
8.2 KiB
C++
// Created on: 2016-10-14
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// Created by: Alexander MALYSHEV
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// Copyright (c) 1999-2016 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_SimpleOffset_HeaderFile
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#define _BRepOffset_SimpleOffset_HeaderFile
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#include "BRepTools_Modification.hxx"
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#include "Geom2d_Curve.hxx"
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#include "GeomAbs_Shape.hxx"
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#include "NCollection_DataMap.hxx"
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#include "Standard_Macro.hxx"
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#include "Standard_Real.hxx"
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#include "Standard_Type.hxx"
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#include "TopoDS_Edge.hxx"
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#include "TopoDS_Face.hxx"
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#include "TopoDS_Vertex.hxx"
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#include "TopTools_IndexedDataMapOfShapeListOfShape.hxx"
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class BRepOffset_SimpleOffset;
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DEFINE_STANDARD_HANDLE(BRepOffset_SimpleOffset, BRepTools_Modification)
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//! This class represents mechanism of simple offset algorithm i. e.
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//! topology-preserve offset construction without intersection.
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//!
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//! The list below shows mapping scheme:
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//! - Each surface is mapped to its geometric offset surface.
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//! - For each edge, pcurves are mapped to the same pcurves on offset surfaces.
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//! - For each edge, 3d curve is constructed by re-approximation of pcurve on the first offset face.
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//! - Position of each vertex in a result shell is computed as average point of all ends of edges
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//! shared by that vertex.
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//! - Tolerances are updated according to the resulting geometry.
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class BRepOffset_SimpleOffset : public BRepTools_Modification
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{
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public:
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DEFINE_STANDARD_RTTI_INLINE(BRepOffset_SimpleOffset, BRepTools_Modification)
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//! Constructor.
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//! @param theInputShape shape to be offset
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//! @param theOffsetValue offset distance (signed)
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//! @param theTolerance tolerance for handling singular points
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Standard_EXPORT BRepOffset_SimpleOffset(const TopoDS_Shape& theInputShape,
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const Standard_Real theOffsetValue,
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const Standard_Real theTolerance);
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//! Returns Standard_True if the face <F> has been
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//! modified. In this case, <S> is the new geometric
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//! support of the face, <L> the new location,<Tol>
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//! the new tolerance.<RevWires> has to be set to
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//! Standard_True when the modification reverses the
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//! normal of the surface.(the wires have to be
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//! reversed). <RevFace> has to be set to
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//! Standard_True if the orientation of the modified
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//! face changes in the shells which contain it. --
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//! Here, <RevFace> will return Standard_True if the
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//! -- gp_Trsf is negative.
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Standard_EXPORT Standard_Boolean NewSurface(const TopoDS_Face& F,
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Handle(Geom_Surface)& S,
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TopLoc_Location& L,
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Standard_Real& Tol,
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Standard_Boolean& RevWires,
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Standard_Boolean& RevFace) Standard_OVERRIDE;
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//! Returns Standard_True if the edge <E> has been
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//! modified. In this case, <C> is the new geometric
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//! support of the edge, <L> the new location, <Tol>
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//! the new tolerance. Otherwise, returns
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//! Standard_False, and <C>, <L>, <Tol> are not
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//! significant.
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Standard_EXPORT Standard_Boolean NewCurve(const TopoDS_Edge& E,
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Handle(Geom_Curve)& C,
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TopLoc_Location& L,
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Standard_Real& Tol) Standard_OVERRIDE;
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//! Returns Standard_True if the vertex <V> has been
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//! modified. In this case, <P> is the new geometric
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//! support of the vertex, <Tol> the new tolerance.
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//! Otherwise, returns Standard_False, and <P>, <Tol>
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//! are not significant.
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Standard_EXPORT Standard_Boolean NewPoint(const TopoDS_Vertex& V,
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gp_Pnt& P,
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Standard_Real& Tol) Standard_OVERRIDE;
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//! Returns Standard_True if the edge <E> has a new
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//! curve on surface on the face <F>.In this case, <C>
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//! is the new geometric support of the edge, <L> the
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//! new location, <Tol> the new tolerance.
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//! Otherwise, returns Standard_False, and <C>, <L>,
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//! <Tol> are not significant.
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Standard_EXPORT Standard_Boolean NewCurve2d(const TopoDS_Edge& E,
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const TopoDS_Face& F,
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const TopoDS_Edge& NewE,
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const TopoDS_Face& NewF,
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Handle(Geom2d_Curve)& C,
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Standard_Real& Tol) Standard_OVERRIDE;
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//! Returns Standard_True if the Vertex <V> has a new
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//! parameter on the edge <E>. In this case, <P> is
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//! the parameter, <Tol> the new tolerance.
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//! Otherwise, returns Standard_False, and <P>, <Tol>
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//! are not significant.
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Standard_EXPORT Standard_Boolean NewParameter(const TopoDS_Vertex& V,
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const TopoDS_Edge& E,
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Standard_Real& P,
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Standard_Real& Tol) Standard_OVERRIDE;
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//! Returns the continuity of <NewE> between <NewF1>
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//! and <NewF2>.
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//!
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//! <NewE> is the new edge created from <E>. <NewF1>
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//! (resp. <NewF2>) is the new face created from <F1>
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//! (resp. <F2>).
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Standard_EXPORT GeomAbs_Shape Continuity(const TopoDS_Edge& E,
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const TopoDS_Face& F1,
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const TopoDS_Face& F2,
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const TopoDS_Edge& NewE,
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const TopoDS_Face& NewF1,
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const TopoDS_Face& NewF2) Standard_OVERRIDE;
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private:
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//! Method to fill new face data for single face.
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void FillFaceData(const TopoDS_Face& theFace);
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//! Method to fill new edge data for single edge.
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void FillEdgeData(const TopoDS_Edge& theEdge,
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const TopTools_IndexedDataMapOfShapeListOfShape& theEdgeFaceMap,
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const Standard_Integer theIdx);
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//! Method to fill new vertex data for single vertex.
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void FillVertexData(const TopoDS_Vertex& theVertex,
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const TopTools_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap,
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const Standard_Integer theIdx);
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struct NewFaceData
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{
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Handle(Geom_Surface) myOffsetS;
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TopLoc_Location myL;
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Standard_Real myTol;
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Standard_Boolean myRevWires;
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Standard_Boolean myRevFace;
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};
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struct NewEdgeData
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{
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Handle(Geom_Curve) myOffsetC; // Resulting curve.
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TopLoc_Location myL;
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Standard_Real myTol;
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};
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struct NewVertexData
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{
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gp_Pnt myP;
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Standard_Real myTol;
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};
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//! Fills offset data.
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void FillOffsetData(const TopoDS_Shape& theInputShape);
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//! Copy-assignment constructor and copy constructor are not allowed.
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void operator=(const BRepOffset_SimpleOffset&);
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BRepOffset_SimpleOffset(const BRepOffset_SimpleOffset&);
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//! Map of faces to new faces information.
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NCollection_DataMap<TopoDS_Face, NewFaceData> myFaceInfo;
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//! Map of edges to new edges information.
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NCollection_DataMap<TopoDS_Edge, NewEdgeData> myEdgeInfo;
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//! Map of vertices to new vertices information.
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NCollection_DataMap<TopoDS_Vertex, NewVertexData> myVertexInfo;
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//! Offset value.
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Standard_Real myOffsetValue;
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//! Tolerance.
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Standard_Real myTolerance;
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};
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#endif // _BRepOffset_SimpleOffset_HeaderFile
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