PartDesign: implement Transform and Pattern features
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jrheinlaender
169
src/Mod/PartDesign/App/FeatureLinearPattern.cpp
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169
src/Mod/PartDesign/App/FeatureLinearPattern.cpp
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/******************************************************************************
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* Copyright (c)2012 Jan Rheinlaender <jrheinlaender@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 <TopoDS.hxx>
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# include <TopoDS_Face.hxx>
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# include <gp_Pln.hxx>
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# include <gp_Dir.hxx>
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# include <gp_Ax1.hxx>
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# include <BRepAdaptor_Curve.hxx>
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# include <BRepAdaptor_Surface.hxx>
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#endif
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#include "FeatureLinearPattern.h"
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#include <Mod/Part/App/TopoShape.h>
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#include <Base/Axis.h>
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using namespace PartDesign;
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namespace PartDesign {
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PROPERTY_SOURCE(PartDesign::LinearPattern, PartDesign::Transformed)
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LinearPattern::LinearPattern()
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{
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ADD_PROPERTY_TYPE(Direction,(0),"LinearPattern",(App::PropertyType)(App::Prop_None),"Direction");
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ADD_PROPERTY(StdDirection,(""));
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ADD_PROPERTY(Reversed,(0));
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ADD_PROPERTY(Length,(100.0));
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ADD_PROPERTY(Occurrences,(3));
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}
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short LinearPattern::mustExecute() const
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{
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if (Direction.isTouched() ||
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StdDirection.isTouched() ||
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Reversed.isTouched() ||
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Length.isTouched() ||
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Occurrences.isTouched())
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return 1;
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return Transformed::mustExecute();
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}
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const std::list<gp_Trsf> LinearPattern::getTransformations(const std::vector<App::DocumentObject*>)
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{
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std::string stdDirection = StdDirection.getValue();
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float distance = Length.getValue();
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if (distance < Precision::Confusion())
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throw Base::Exception("Pattern length too small");
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int occurrences = Occurrences.getValue();
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if (occurrences < 2)
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throw Base::Exception("At least two occurrences required");
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bool reversed = Reversed.getValue();
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gp_Dir dir;
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double offset = distance / (occurrences - 1);
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if (!stdDirection.empty()) {
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// Note: The placement code commented out below had the defect of working always on the
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// absolute X,Y,Z direction, not on the relative coordinate system of the Body feature.
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// It requires positionBySupport() to be called in Transformed::Execute() AFTER
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// the call to getTransformations()
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// New code thanks to logari81
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if (stdDirection == "X") {
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//dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(1,0,0));
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dir = gp_Dir(1,0,0);
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} else if (stdDirection == "Y") {
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//dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(0,1,0));
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dir = gp_Dir(0,1,0);
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} else if(stdDirection == "Z") {
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//dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(0,0,1));
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dir = gp_Dir(0,0,1);
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} else {
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throw Base::Exception("Invalid direction (must be X, Y or Z)");
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}
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} else {
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App::DocumentObject* refObject = Direction.getValue();
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if (refObject == NULL)
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throw Base::Exception("No direction specified");
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if (!refObject->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
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throw Base::Exception("Direction reference must be edge or face of a feature");
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std::vector<std::string> subStrings = Direction.getSubValues();
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if (subStrings.empty() || subStrings[0].empty())
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throw Base::Exception("No direction reference specified");
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Part::Feature* refFeature = static_cast<Part::Feature*>(refObject);
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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 direction plane");
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BRepAdaptor_Surface adapt(refFace);
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if (adapt.GetType() != GeomAbs_Plane)
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throw Base::Exception("Direction face must be planar");
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dir = adapt.Plane().Axis().Direction();
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//gp_Dir d = adapt.Plane().Axis().Direction();
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//dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(d.X(), d.Y(), d.Z()));
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} else 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 direction 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("Direction edge must be a straight line");
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//gp_Dir d = adapt.Line().Direction();
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//dir = Base::Axis(Base::Vector3d(0,0,0), Base::Vector3d(d.X(), d.Y(), d.Z()));
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dir = adapt.Line().Direction();
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} else {
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throw Base::Exception("Direction reference must be edge or face");
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}
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TopLoc_Location invObjLoc = this->getLocation().Inverted();
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dir.Transform(invObjLoc.Transformation());
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}
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// get the support placement
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// TODO: Check for NULL pointer
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/*Part::Feature* supportFeature = static_cast<Part::Feature*>(originals.front());
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if (supportFeature == NULL)
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throw Base::Exception("Cannot work on invalid support shape");
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Base::Placement supportPlacement = supportFeature->Placement.getValue();
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dir *= supportPlacement;
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gp_Vec direction(dir.getDirection().x, dir.getDirection().y, dir.getDirection().z);*/
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gp_Vec direction(dir.X(), dir.Y(), dir.Z());
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if (reversed)
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direction.Reverse();
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// Note: The original feature is NOT included in the list of transformations! Therefore
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// we start with occurrence number 1, not number 0
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std::list<gp_Trsf> transformations;
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gp_Trsf trans;
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transformations.push_back(trans); // identity transformation
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for (int i = 1; i < occurrences; i++) {
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trans.SetTranslation(direction * i * offset);
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transformations.push_back(trans);
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}
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return transformations;
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}
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}
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