// Created on: 2016-10-14 // Created by: Alexander MALYSHEV // Copyright (c) 1999-2016 OPEN CASCADE SAS // // This file is part of Open CASCADE Technology software library. // // This library is free software; you can redistribute it and/or modify it under // the terms of the GNU Lesser General Public License version 2.1 as published // by the Free Software Foundation, with special exception defined in the file // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT // distribution for complete text of the license and disclaimer of any warranty. // // Alternatively, this file may be used under the terms of Open CASCADE // commercial license or contractual agreement. #ifndef _BRepOffset_SimpleOffset_HeaderFile #define _BRepOffset_SimpleOffset_HeaderFile #include #include #include #include #include #include #include #include #include class BRepOffset_SimpleOffset; DEFINE_STANDARD_HANDLE(BRepOffset_SimpleOffset, BRepTools_Modification) //! This class represents mechanism of simple offset algorithm i. e. //! topology-preserve offset construction without intersection. //! //! The list below shows mapping scheme: //! - Each surface is mapped to its geometric offset surface. //! - For each edge, pcurves are mapped to the same pcurves on offset surfaces. //! - For each edge, 3d curve is constructed by re-approximation of pcurve on the first offset face. //! - Position of each vertex in a result shell is computed as average point of all ends of edges shared by that vertex. //! - Tolerances are updated according to the resulting geometry. class BRepOffset_SimpleOffset : public BRepTools_Modification { public: DEFINE_STANDARD_RTTI_INLINE(BRepOffset_SimpleOffset, BRepTools_Modification) //! Constructor. //! @param theInputShape shape to be offset //! @param theOffsetValue offset distance (signed) //! @param theTolerance tolerance for handling singular points Standard_EXPORT BRepOffset_SimpleOffset(const TopoDS_Shape& theInputShape, const Standard_Real theOffsetValue, const Standard_Real theTolerance); //! Returns Standard_True if the face has been //! modified. In this case, is the new geometric //! support of the face, the new location, //! the new tolerance. has to be set to //! Standard_True when the modification reverses the //! normal of the surface.(the wires have to be //! reversed). has to be set to //! Standard_True if the orientation of the modified //! face changes in the shells which contain it. -- //! Here, will return Standard_True if the //! -- gp_Trsf is negative. Standard_EXPORT Standard_Boolean NewSurface (const TopoDS_Face& F, Handle(Geom_Surface)& S, TopLoc_Location& L, Standard_Real& Tol, Standard_Boolean& RevWires, Standard_Boolean& RevFace) Standard_OVERRIDE; //! Returns Standard_True if the edge has been //! modified. In this case, is the new geometric //! support of the edge, the new location, //! the new tolerance. Otherwise, returns //! Standard_False, and , , are not //! significant. Standard_EXPORT Standard_Boolean NewCurve (const TopoDS_Edge& E, Handle(Geom_Curve)& C, TopLoc_Location& L, Standard_Real& Tol) Standard_OVERRIDE; //! Returns Standard_True if the vertex has been //! modified. In this case,

is the new geometric //! support of the vertex, the new tolerance. //! Otherwise, returns Standard_False, and

, //! are not significant. Standard_EXPORT Standard_Boolean NewPoint (const TopoDS_Vertex& V, gp_Pnt& P, Standard_Real& Tol) Standard_OVERRIDE; //! Returns Standard_True if the edge has a new //! curve on surface on the face .In this case, //! is the new geometric support of the edge, the //! new location, the new tolerance. //! Otherwise, returns Standard_False, and , , //! are not significant. Standard_EXPORT Standard_Boolean NewCurve2d (const TopoDS_Edge& E, const TopoDS_Face& F, const TopoDS_Edge& NewE, const TopoDS_Face& NewF, Handle(Geom2d_Curve)& C, Standard_Real& Tol) Standard_OVERRIDE; //! Returns Standard_True if the Vertex has a new //! parameter on the edge . In this case,

is //! the parameter, the new tolerance. //! Otherwise, returns Standard_False, and

, //! are not significant. Standard_EXPORT Standard_Boolean NewParameter (const TopoDS_Vertex& V, const TopoDS_Edge& E, Standard_Real& P, Standard_Real& Tol) Standard_OVERRIDE; //! Returns the continuity of between //! and . //! //! is the new edge created from . //! (resp. ) is the new face created from //! (resp. ). Standard_EXPORT GeomAbs_Shape Continuity (const TopoDS_Edge& E, const TopoDS_Face& F1, const TopoDS_Face& F2, const TopoDS_Edge& NewE, const TopoDS_Face& NewF1, const TopoDS_Face& NewF2) Standard_OVERRIDE; private: //! Method to fill new face data for single face. void FillFaceData(const TopoDS_Face& theFace); //! Method to fill new edge data for single edge. void FillEdgeData(const TopoDS_Edge& theEdge, const TopTools_IndexedDataMapOfShapeListOfShape& theEdgeFaceMap, const Standard_Integer theIdx); //! Method to fill new vertex data for single vertex. void FillVertexData(const TopoDS_Vertex& theVertex, const TopTools_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap, const Standard_Integer theIdx); struct NewFaceData { Handle(Geom_Surface) myOffsetS; TopLoc_Location myL; Standard_Real myTol; Standard_Boolean myRevWires; Standard_Boolean myRevFace; }; struct NewEdgeData { Handle(Geom_Curve) myOffsetC; // Resulting curve. TopLoc_Location myL; Standard_Real myTol; }; struct NewVertexData { gp_Pnt myP; Standard_Real myTol; }; //! Fills offset data. void FillOffsetData(const TopoDS_Shape& theInputShape); //! Copy-assignment constructor and copy constructor are not allowed. void operator=(const BRepOffset_SimpleOffset&); BRepOffset_SimpleOffset(const BRepOffset_SimpleOffset&); //! Map of faces to new faces information. NCollection_DataMap myFaceInfo; //! Map of edges to new edges information. NCollection_DataMap myEdgeInfo; //! Map of vertices to new vertices information. NCollection_DataMap myVertexInfo; //! Offset value. Standard_Real myOffsetValue; //! Tolerance. Standard_Real myTolerance; }; #endif // _BRepOffset_SimpleOffset_HeaderFile