mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-18 11:20:21 +00:00
Thomas Krijnen
131 lines
4.3 KiB
C++
131 lines
4.3 KiB
C++
/********************************************************************************
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* *
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* This file is part of IfcOpenShell. *
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* *
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* IfcOpenShell is free software: you can redistribute it and/or modify *
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* it under the terms of the Lesser GNU General Public License as published by *
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* the Free Software Foundation, either version 3.0 of the License, or *
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* (at your option) any later version. *
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* *
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* IfcOpenShell 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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* Lesser GNU General Public License for more details. *
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* *
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* You should have received a copy of the Lesser GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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* *
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********************************************************************************/
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#include <Geom_Circle.hxx>
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#include <Geom_Ellipse.hxx>
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#include <BRepBuilderAPI_MakeEdge.hxx>
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#include <TopoDS.hxx>
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#include <TopoDS_Wire.hxx>
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#include <TopExp.hxx>
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#include <TopExp_Explorer.hxx>
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#include <BRepAlgoAPI_Cut.hxx>
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#include <ShapeFix_Shape.hxx>
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#include <BRepCheck_Analyzer.hxx>
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#include "../ifcgeom/IfcGeom.h"
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#include "../ifcgeom_schema_agnostic/sweep_utils.h"
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#define Kernel MAKE_TYPE_NAME(Kernel)
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bool IfcGeom::Kernel::convert(const IfcSchema::IfcSweptDiskSolid* l, TopoDS_Shape& shape) {
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TopoDS_Wire wire, section1, section2;
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bool hasInnerRadius = !!l->InnerRadius();
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if (!convert_wire(l->Directrix(), wire)) {
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return false;
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}
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// Start- EndParam became optional in IFC4
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#ifdef SCHEMA_IfcSweptDiskSolid_StartParam_IS_OPTIONAL
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auto sp = l->StartParam();
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auto ep = l->EndParam();
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#else
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boost::optional<double> sp, ep;
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sp = l->StartParam();
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ep = l->EndParam();
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#endif
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if (count(wire, TopAbs_EDGE) == 1 && sp && ep) {
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TopoDS_Vertex v0, v1;
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TopExp::Vertices(wire, v0, v1);
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if (v0.IsSame(v1)) {
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TopExp_Explorer exp(wire, TopAbs_EDGE);
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auto& e = TopoDS::Edge(exp.Current());
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double a, b;
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auto crv = BRep_Tool::Curve(e, a, b);
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if ((crv->DynamicType() == STANDARD_TYPE(Geom_Circle)) ||
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(crv->DynamicType() == STANDARD_TYPE(Geom_Ellipse)))
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{
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BRepBuilderAPI_MakeEdge me(crv, *sp, *ep);
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if (me.IsDone()) {
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auto e2 = me.Edge();
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BRep_Builder B;
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wire.Nullify();
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B.MakeWire(wire);
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B.Add(wire, e2);
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}
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}
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}
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}
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// NB: Note that StartParam and EndParam param are ignored and the assumption is
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// made that the parametric range over which to be swept matches the IfcCurve in
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// its entirety.
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util::process_sweep(wire, l->Radius() * getValue(GV_LENGTH_UNIT), shape);
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if (shape.IsNull()) {
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return false;
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}
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double r2 = 0.;
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if (hasInnerRadius) {
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// Subtraction of pipes with small radii is unstable.
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r2 = *l->InnerRadius() * getValue(GV_LENGTH_UNIT);
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}
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if (r2 > getValue(GV_PRECISION) * 10.) {
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TopoDS_Shape inner;
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util::process_sweep(wire, r2, inner);
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bool is_valid = false;
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// Boolean op on the compound of separately processed sweeps
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// is not attempted.
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// @todo iterate over compound subshapes and process boolean
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// separately.
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// @todo don't process as boolean op at all, since we know
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// only the start and end faces intersect and we know they
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// are co-planar and we know they are circles.
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if (shape.ShapeType() != TopAbs_COMPOUND) {
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BRepAlgoAPI_Cut brep_cut(shape, inner);
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if (brep_cut.IsDone()) {
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TopoDS_Shape result = brep_cut;
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ShapeFix_Shape fix(result);
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fix.Perform();
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result = fix.Shape();
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is_valid = BRepCheck_Analyzer(result).IsValid() != 0;
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if (is_valid) {
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shape = result;
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}
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}
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}
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if (!is_valid) {
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Logger::Message(Logger::LOG_WARNING, "Failed to subtract inner radius void for:", l);
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}
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}
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return true;
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}
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