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973c2be1e1
The copying permission statements at the beginning of source files updated to refer to LGPL. Copyright dates extended till 2014 in advance.
136 lines
5.0 KiB
C++
136 lines
5.0 KiB
C++
// Created on: 2013-05-20
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// Created by: Vlad ROMASHKO
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// Copyright (c) 2003-2014 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
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// under the terms of the GNU Lesser General Public 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 _ANAFILLETALGO_H_
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#define _ANAFILLETALGO_H_
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#include <TopoDS_Wire.hxx>
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#include <TopoDS_Edge.hxx>
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#include <gp_Pln.hxx>
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//! An analytical algorithm for calculation of the fillets.
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//! It is implemented for segments and arcs of circle only.
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class ChFi2d_AnaFilletAlgo
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{
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public:
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//! An empty constructor.
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//! Use the method Init() to initialize the class.
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Standard_EXPORT ChFi2d_AnaFilletAlgo();
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//! A constructor.
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//! It expects a wire consisting of two edges of type (any combination of):
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//! - segment
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//! - arc of circle.
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Standard_EXPORT ChFi2d_AnaFilletAlgo(const TopoDS_Wire& theWire,
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const gp_Pln& thePlane);
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//! A constructor.
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//! It expects two edges having a common point of type:
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//! - segment
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//! - arc of circle.
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Standard_EXPORT ChFi2d_AnaFilletAlgo(const TopoDS_Edge& theEdge1,
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const TopoDS_Edge& theEdge2,
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const gp_Pln& thePlane);
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//! Initializes the class by a wire consisting of two edges.
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Standard_EXPORT void Init(const TopoDS_Wire& theWire, const gp_Pln& thePlane);
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//! Initializes the class by two edges.
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Standard_EXPORT void Init(const TopoDS_Edge& theEdge1, const TopoDS_Edge& theEdge2,
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const gp_Pln& thePlane);
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//! Calculates a fillet.
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Standard_EXPORT Standard_Boolean Perform(const Standard_Real radius);
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//! Retrieves a result (fillet and shrinked neighbours).
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Standard_EXPORT const TopoDS_Edge& Result(TopoDS_Edge& e1, TopoDS_Edge& e2);
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private:
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// WW5 method to compute fillet.
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// It returns a constructed fillet definition:
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// center point (xc, yc)
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// point on the 1st segment (xstart, ystart)
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// point on the 2nd segment (xend, yend)
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// is the arc of fillet clockwise (cw = true) or counterclockwise (cw = false).
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Standard_Boolean SegmentFilletSegment(const Standard_Real radius,
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Standard_Real& xc, Standard_Real& yc,
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Standard_Boolean& cw,
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Standard_Real& start, Standard_Real& end);
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// A function constructs a fillet between a segment and an arc.
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Standard_Boolean SegmentFilletArc(const Standard_Real radius,
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Standard_Real& xc, Standard_Real& yc,
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Standard_Boolean& cw,
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Standard_Real& start, Standard_Real& end,
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Standard_Real& xend, Standard_Real& yend);
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// A function constructs a fillet between an arc and a segment.
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Standard_Boolean ArcFilletSegment(const Standard_Real radius,
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Standard_Real& xc, Standard_Real& yc,
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Standard_Boolean& cw,
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Standard_Real& start, Standard_Real& end,
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Standard_Real& xstart, Standard_Real& ystart);
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// WW5 method to compute fillet: arc - arc.
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// It returns a constructed fillet definition:
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// center point (xc, yc)
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// shrinking parameter of the 1st circle (start)
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// shrinking parameter of the 2nd circle (end)
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// if the arc of fillet clockwise (cw = true) or counterclockwise (cw = false).
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Standard_Boolean ArcFilletArc(const Standard_Real radius,
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Standard_Real& xc, Standard_Real& yc,
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Standard_Boolean& cw,
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Standard_Real& start, Standard_Real& end);
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// Cuts intersecting edges of a contour.
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Standard_Boolean Cut(const gp_Pln& plane, TopoDS_Edge& e1, TopoDS_Edge& e2);
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// Plane.
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gp_Pln plane;
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// Left neighbour.
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TopoDS_Edge e1;
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Standard_Boolean segment1;
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Standard_Real x11;
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Standard_Real y11;
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Standard_Real x12;
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Standard_Real y12;
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Standard_Real xc1;
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Standard_Real yc1;
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Standard_Real radius1;
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Standard_Boolean cw1;
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// Right neighbour.
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TopoDS_Edge e2;
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Standard_Boolean segment2;
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Standard_Real x21;
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Standard_Real y21;
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Standard_Real x22;
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Standard_Real y22;
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Standard_Real xc2;
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Standard_Real yc2;
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Standard_Real radius2;
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Standard_Boolean cw2;
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// Fillet (result).
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TopoDS_Edge fillet;
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TopoDS_Edge shrinke1;
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TopoDS_Edge shrinke2;
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};
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#endif // _ANAFILLETALGO_H_
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