280 lines
12 KiB
C++
280 lines
12 KiB
C++
/***************************************************************************
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* Copyright (c) 2012 Jan Rheinländer <jrheinlaender[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 <BRepOffsetAPI_DraftAngle.hxx>
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# include <TopTools_IndexedMapOfShape.hxx>
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# include <TopExp.hxx>
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# include <TopExp_Explorer.hxx>
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# include <TopoDS.hxx>
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# include <TopoDS_Face.hxx>
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# include <BRepAdaptor_Surface.hxx>
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# include <BRepAdaptor_Curve.hxx>
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# include <gp_Dir.hxx>
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# include <gp_Pln.hxx>
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# include <gp_Ax1.hxx>
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//# include <BRepAdaptor_CompCurve.hxx>
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# include <gp_Pln.hxx>
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# include <gp_Lin.hxx>
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# include <gp_Dir.hxx>
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# include <gp_Circ.hxx>
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# include <GeomAbs_SurfaceType.hxx>
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# include <GeomAPI_IntSS.hxx>
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# include <Geom_Plane.hxx>
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# include <Geom_Curve.hxx>
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# include <Geom_Line.hxx>
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# include <BRepBuilderAPI_MakeEdge.hxx>
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#endif
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#include <Mod/Part/App/TopoShape.h>
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#include "FeatureDraft.h"
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using namespace PartDesign;
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#include <Base/Console.h>
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PROPERTY_SOURCE(PartDesign::Draft, PartDesign::DressUp)
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const App::PropertyFloatConstraint::Constraints floatAngle = {0.0f,89.99f,0.1f};
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Draft::Draft()
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{
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ADD_PROPERTY(Angle,(1.5f));
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Angle.setConstraints(&floatAngle);
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ADD_PROPERTY_TYPE(NeutralPlane,(0),"Draft",(App::PropertyType)(App::Prop_None),"NeutralPlane");
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ADD_PROPERTY_TYPE(PullDirection,(0),"Draft",(App::PropertyType)(App::Prop_None),"PullDirection");
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ADD_PROPERTY(Reversed,(0));
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}
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short Draft::mustExecute() const
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{
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if (Placement.isTouched() ||
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Angle.isTouched() ||
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NeutralPlane.isTouched() ||
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PullDirection.isTouched() ||
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Reversed.isTouched())
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return 1;
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return DressUp::mustExecute();
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}
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App::DocumentObjectExecReturn *Draft::execute(void)
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{
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// Get parameters
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// Base shape
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App::DocumentObject* link = Base.getValue();
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if (!link)
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return new App::DocumentObjectExecReturn("No object linked");
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if (!link->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
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return new App::DocumentObjectExecReturn("Linked object is not a Part object");
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Part::Feature *base = static_cast<Part::Feature*>(Base.getValue());
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const Part::TopoShape& TopShape = base->Shape.getShape();
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if (TopShape._Shape.IsNull())
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return new App::DocumentObjectExecReturn("Cannot draft invalid shape");
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// Faces where draft should be applied
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const std::vector<std::string>& SubVals = Base.getSubValuesStartsWith("Face");
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if (SubVals.size() == 0)
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return new App::DocumentObjectExecReturn("No faces specified");
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// Draft angle
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float angle = Angle.getValue() / 180.0 * M_PI;
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// Pull direction
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gp_Dir pullDirection;
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App::DocumentObject* refDirection = PullDirection.getValue();
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if (refDirection != NULL) {
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if (!refDirection->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
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throw Base::Exception("Pull direction reference must be an edge of a feature");
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std::vector<std::string> subStrings = PullDirection.getSubValues();
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if (subStrings.empty() || subStrings[0].empty())
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throw Base::Exception("No pull direction reference specified");
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Part::Feature* refFeature = static_cast<Part::Feature*>(refDirection);
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Part::TopoShape refShape = refFeature->Shape.getShape();
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TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());
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if (ref.ShapeType() == TopAbs_EDGE) {
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TopoDS_Edge refEdge = TopoDS::Edge(ref);
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if (refEdge.IsNull())
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throw Base::Exception("Failed to extract pull direction reference edge");
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BRepAdaptor_Curve adapt(refEdge);
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if (adapt.GetType() != GeomAbs_Line)
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throw Base::Exception("Pull direction reference edge must be linear");
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pullDirection = adapt.Line().Direction();
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} else {
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throw Base::Exception("Pull direction reference must be an edge");
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}
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TopLoc_Location invObjLoc = this->getLocation().Inverted();
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pullDirection.Transform(invObjLoc.Transformation());
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}
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// Neutral plane
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gp_Pln neutralPlane;
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App::DocumentObject* refPlane = NeutralPlane.getValue();
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if (refPlane == NULL) {
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// Try to guess a neutral plane from the first selected face
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// Get edges of first selected face
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TopoDS_Shape face = TopShape.getSubShape(SubVals[0].c_str());
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TopTools_IndexedMapOfShape mapOfEdges;
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TopExp::MapShapes(face, TopAbs_EDGE, mapOfEdges);
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bool found;
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for (int i = 1; i <= mapOfEdges.Extent(); i++) {
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// Note: What happens if mapOfEdges(i) is the degenerated edge of a cone?
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// But in that case the draft is not possible anyway!
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BRepAdaptor_Curve c(TopoDS::Edge(mapOfEdges(i)));
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gp_Pnt p1 = c.Value(c.FirstParameter());
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gp_Pnt p2 = c.Value(c.LastParameter());
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if (c.IsClosed()) {
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// Edge is a circle or a circular arc (other types are not allowed for drafting)
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neutralPlane = gp_Pln(p1, c.Circle().Axis().Direction());
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found = true;
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break;
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} else {
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// Edge is linear
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// Find midpoint of edge and create auxiliary plane through midpoint normal to edge
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gp_Pnt pm = c.Value((c.FirstParameter() + c.LastParameter()) / 2.0);
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Handle_Geom_Plane aux = new Geom_Plane(pm, gp_Dir(p2.X() - p1.X(), p2.Y() - p1.Y(), p2.Z() - p1.Z()));
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// Intersect plane with face. Is there no easier way?
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BRepAdaptor_Surface adapt(TopoDS::Face(face), Standard_False);
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Handle_Geom_Surface sf = adapt.Surface().Surface();
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GeomAPI_IntSS intersector(aux, sf, Precision::Confusion());
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if (!intersector.IsDone())
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continue;
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Handle_Geom_Curve icurve = intersector.Line(1);
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if (!icurve->IsKind(STANDARD_TYPE(Geom_Line)))
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continue;
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// TODO: How to extract the line from icurve without creating an edge first?
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TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(icurve);
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BRepAdaptor_Curve c(edge);
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neutralPlane = gp_Pln(pm, c.Line().Direction());
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found = true;
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break;
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}
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}
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if (!found)
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throw Base::Exception("No neutral plane specified and none can be guessed");
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} else {
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if (!refPlane->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
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throw Base::Exception("Neutral plane reference must be face of a feature");
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std::vector<std::string> subStrings = NeutralPlane.getSubValues();
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if (subStrings.empty() || subStrings[0].empty())
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throw Base::Exception("No neutral plane reference specified");
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Part::Feature* refFeature = static_cast<Part::Feature*>(refPlane);
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Part::TopoShape refShape = refFeature->Shape.getShape();
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TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());
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if (ref.ShapeType() == TopAbs_FACE) {
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TopoDS_Face refFace = TopoDS::Face(ref);
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if (refFace.IsNull())
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throw Base::Exception("Failed to extract neutral plane reference face");
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BRepAdaptor_Surface adapt(refFace);
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if (adapt.GetType() != GeomAbs_Plane)
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throw Base::Exception("Neutral plane reference face must be planar");
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neutralPlane = adapt.Plane();
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} else if (ref.ShapeType() == TopAbs_EDGE) {
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if (refDirection != NULL) {
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// Create neutral plane through edge normal to pull direction
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TopoDS_Edge refEdge = TopoDS::Edge(ref);
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if (refEdge.IsNull())
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throw Base::Exception("Failed to extract neutral plane reference edge");
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BRepAdaptor_Curve c(refEdge);
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if (!c.GetType() == GeomAbs_Line)
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throw Base::Exception("Neutral plane reference edge must be linear");
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double a = c.Line().Angle(gp_Lin(c.Value(c.FirstParameter()), pullDirection));
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if (std::fabs(a - M_PI_2) > Precision::Confusion())
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throw Base::Exception("Neutral plane reference edge must be normal to pull direction");
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neutralPlane = gp_Pln(c.Value(c.FirstParameter()), pullDirection);
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} else {
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throw Base::Exception("Neutral plane reference can only be an edge if pull direction is defined");
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}
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} else {
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throw Base::Exception("Neutral plane reference must be a face");
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}
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TopLoc_Location invObjLoc = this->getLocation().Inverted();
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neutralPlane.Transform(invObjLoc.Transformation());
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}
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if (refDirection == NULL) {
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// Choose pull direction normal to neutral plane
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pullDirection = neutralPlane.Axis().Direction();
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}
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// Reversed pull direction
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bool reversed = Reversed.getValue();
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if (reversed)
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angle *= -1.0;
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this->positionByBase();
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// create an untransformed copy of the base shape
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Part::TopoShape baseShape(TopShape);
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baseShape.setTransform(Base::Matrix4D());
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try {
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BRepOffsetAPI_DraftAngle mkDraft(baseShape._Shape);
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// Note:
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// LocOpe_SplitDrafts can split a face with a wire and apply draft to both parts
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// Not clear though whether the face must have free boundaries
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// LocOpe_DPrism can create a stand-alone draft prism. The sketch can only have a single
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// wire, though.
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// BRepFeat_MakeDPrism requires a support for the operation but will probably support multiple
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// wires in the sketch
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for (std::vector<std::string>::const_iterator it=SubVals.begin(); it != SubVals.end(); ++it) {
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TopoDS_Face face = TopoDS::Face(baseShape.getSubShape(it->c_str()));
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// TODO: What is the flag for?
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mkDraft.Add(face, pullDirection, angle, neutralPlane);
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if (!mkDraft.AddDone()) {
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// Note: the function ProblematicShape returns the face on which the error occurred,
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mkDraft.Remove(face);
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Base::Console().Error("Adding face failed: %u\n", mkDraft.Status());
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}
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}
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mkDraft.Build();
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if (!mkDraft.IsDone())
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return new App::DocumentObjectExecReturn("Failed to create draft");
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TopoDS_Shape shape = mkDraft.Shape();
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if (shape.IsNull())
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return new App::DocumentObjectExecReturn("Resulting shape is null");
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this->Shape.setValue(shape);
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return App::DocumentObject::StdReturn;
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}
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catch (Standard_Failure) {
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Handle_Standard_Failure e = Standard_Failure::Caught();
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return new App::DocumentObjectExecReturn(e->GetMessageString());
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}
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}
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