mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-12 10:33:20 +00:00
Thomas Krijnen
85 lines
3.6 KiB
C++
85 lines
3.6 KiB
C++
/********************************************************************************
|
|
* *
|
|
* This file is part of IfcOpenShell. *
|
|
* *
|
|
* IfcOpenShell is free software: you can redistribute it and/or modify *
|
|
* it under the terms of the Lesser GNU General Public License as published by *
|
|
* the Free Software Foundation, either version 3.0 of the License, or *
|
|
* (at your option) any later version. *
|
|
* *
|
|
* IfcOpenShell is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
|
|
* Lesser GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the Lesser GNU General Public License *
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
|
|
* *
|
|
********************************************************************************/
|
|
|
|
#include <gp_Pnt.hxx>
|
|
#include <gp_Pln.hxx>
|
|
#include <Geom_TrimmedCurve.hxx>
|
|
#include <Geom_OffsetCurve.hxx>
|
|
#include <BRepOffsetAPI_MakeOffset.hxx>
|
|
#include <BRepBuilderAPI_MakeFace.hxx>
|
|
#include <BRepBuilderAPI_MakeEdge.hxx>
|
|
#include <BRepBuilderAPI_MakeWire.hxx>
|
|
#include <TopoDS.hxx>
|
|
#include <TopoDS_Wire.hxx>
|
|
#include <TopoDS_Face.hxx>
|
|
#include <TopExp_Explorer.hxx>
|
|
#include <BRep_Tool.hxx>
|
|
#include "../ifcgeom/IfcGeom.h"
|
|
|
|
#define Kernel MAKE_TYPE_NAME(Kernel)
|
|
|
|
bool IfcGeom::Kernel::convert(const IfcSchema::IfcCenterLineProfileDef* l, TopoDS_Shape& face) {
|
|
const double d = l->Thickness() * getValue(GV_LENGTH_UNIT) / 2.;
|
|
|
|
TopoDS_Wire wire;
|
|
if (!convert_wire(l->Curve(), wire)) return false;
|
|
|
|
// BRepOffsetAPI_MakeOffset insists on creating circular arc
|
|
// segments for joining the curves that constitute the center
|
|
// line. This is probably not in accordance with the IFC spec.
|
|
// Although it does not specify a method to join segments
|
|
// explicitly, it does dictate 'a constant thickness along the
|
|
// curve'. Therefore for simple singular wires a quick
|
|
// alternative is provided that uses a straight join.
|
|
|
|
TopExp_Explorer exp(wire, TopAbs_EDGE);
|
|
TopoDS_Edge edge = TopoDS::Edge(exp.Current());
|
|
exp.Next();
|
|
|
|
if (!exp.More()) {
|
|
double u1, u2;
|
|
Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, u1, u2);
|
|
|
|
Handle(Geom_TrimmedCurve) trim = new Geom_TrimmedCurve(curve, u1, u2);
|
|
|
|
Handle(Geom_OffsetCurve) c1 = new Geom_OffsetCurve(trim, d, gp::DZ());
|
|
Handle(Geom_OffsetCurve) c2 = new Geom_OffsetCurve(trim, -d, gp::DZ());
|
|
|
|
gp_Pnt c1a, c1b, c2a, c2b;
|
|
c1->D0(c1->FirstParameter(), c1a);
|
|
c1->D0(c1->LastParameter(), c1b);
|
|
c2->D0(c2->FirstParameter(), c2a);
|
|
c2->D0(c2->LastParameter(), c2b);
|
|
|
|
BRepBuilderAPI_MakeWire mw;
|
|
mw.Add(BRepBuilderAPI_MakeEdge(c1));
|
|
mw.Add(BRepBuilderAPI_MakeEdge(c1a, c2a));
|
|
mw.Add(BRepBuilderAPI_MakeEdge(c2));
|
|
mw.Add(BRepBuilderAPI_MakeEdge(c2b, c1b));
|
|
|
|
face = BRepBuilderAPI_MakeFace(mw.Wire());
|
|
} else {
|
|
BRepOffsetAPI_MakeOffset offset(BRepBuilderAPI_MakeFace(gp_Pln(gp::Origin(), gp::DZ())));
|
|
offset.AddWire(wire);
|
|
offset.Perform(d);
|
|
face = BRepBuilderAPI_MakeFace(TopoDS::Wire(offset));
|
|
}
|
|
return true;
|
|
}
|