120ca87015
git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5000 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d
90 lines
3.6 KiB
C++
90 lines
3.6 KiB
C++
/***************************************************************************
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* Copyright (c) 2010 Werner Mayer <wmayer[at]users.sourceforge.net> *
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* *
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* This file is part of the FreeCAD CAx development system. *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU Library General Public *
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* License as published by the Free Software Foundation; either *
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* version 2 of the License, or (at your option) any later version. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU Library General Public License for more details. *
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* *
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* You should have received a copy of the GNU Library General Public *
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* License along with this library; see the file COPYING.LIB. If not, *
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* write to the Free Software Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307, USA *
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* *
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***************************************************************************/
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#include "PreCompiled.h"
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#ifndef _PreComp_
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# include <BRepAlgoAPI_Section.hxx>
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# include <BRepBuilderAPI_MakeWire.hxx>
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# include <gp_Pln.hxx>
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# include <TopExp_Explorer.hxx>
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# include <TopoDS.hxx>
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# include <TopoDS_Edge.hxx>
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# include <TopoDS_Wire.hxx>
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#endif
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#include "CrossSection.h"
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using namespace Part;
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CrossSection::CrossSection(double a, double b, double c, const TopoDS_Shape& s)
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: a(a), b(b), c(c), s(s)
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{
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}
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std::list<TopoDS_Wire> CrossSection::section(double d) const
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{
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std::list<TopoDS_Wire> wires;
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BRepAlgoAPI_Section cs(s, gp_Pln(a,b,c,-d));
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if (cs.IsDone()) {
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std::list<TopoDS_Edge> edges;
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TopExp_Explorer xp;
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for (xp.Init(cs.Shape(), TopAbs_EDGE); xp.More(); xp.Next())
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edges.push_back(TopoDS::Edge(xp.Current()));
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connectEdges(edges, wires);
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}
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return wires;
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}
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void CrossSection::connectEdges (const std::list<TopoDS_Edge>& edges, std::list<TopoDS_Wire>& wires) const
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{
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std::list<TopoDS_Edge> edge_list = edges;
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while (edge_list.size() > 0) {
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BRepBuilderAPI_MakeWire mkWire;
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// add and erase first edge
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mkWire.Add(edge_list.front());
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edge_list.erase(edge_list.begin());
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TopoDS_Wire new_wire = mkWire.Wire(); // current new wire
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// try to connect each edge to the wire, the wire is complete if no more egdes are connectible
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bool found = false;
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do {
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found = false;
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for (std::list<TopoDS_Edge>::iterator pE = edge_list.begin(); pE != edge_list.end();++pE) {
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mkWire.Add(*pE);
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if (mkWire.Error() != BRepBuilderAPI_DisconnectedWire) {
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// edge added ==> remove it from list
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found = true;
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edge_list.erase(pE);
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new_wire = mkWire.Wire();
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break;
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}
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}
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}
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while (found);
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wires.push_back(new_wire);
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}
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}
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