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FreeCAD / src /Mod /PartDesign /App /FeatureDraft.cpp
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/***************************************************************************
* Copyright (c) 2012 Jan Rheinländer *
* <jrheinlaender@users.sourceforge.net> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library 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 *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#include <BRepOffsetAPI_DraftAngle.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <TopTools_IndexedMapOfShape.hxx>
#include <TopExp.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Face.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <Geom_Curve.hxx>
#include <Geom_Line.hxx>
#include <Geom_Plane.hxx>
#include <GeomAPI_IntSS.hxx>
#include <gp_Circ.hxx>
#include <gp_Dir.hxx>
#include <gp_Lin.hxx>
#include <gp_Pln.hxx>
#include <App/Datums.h>
#include <App/Document.h>
#include <Base/Console.h>
#include <Base/Exception.h>
#include <Base/Tools.h>
#include <Mod/Part/App/Part2DObject.h>
#include <Mod/Part/App/TopoShape.h>
#include "FeatureDraft.h"
#include "DatumLine.h"
#include "DatumPlane.h"
using namespace PartDesign;
PROPERTY_SOURCE(PartDesign::Draft, PartDesign::DressUp)
const App::PropertyAngle::Constraints Draft::floatAngle
= {-90.0, 90.0 - Base::toDegrees<double>(Precision::Angular()), 0.1};
Draft::Draft()
{
ADD_PROPERTY(Angle, (1.5));
Angle.setConstraints(&floatAngle);
ADD_PROPERTY_TYPE(NeutralPlane, (nullptr), "Draft", (App::PropertyType)(App::Prop_None), "NeutralPlane");
ADD_PROPERTY_TYPE(
PullDirection,
(nullptr),
"Draft",
(App::PropertyType)(App::Prop_None),
"PullDirection"
);
ADD_PROPERTY(Reversed, (0));
}
void Draft::handleChangedPropertyType(Base::XMLReader& reader, const char* TypeName, App::Property* prop)
{
Base::Type inputType = Base::Type::fromName(TypeName);
if (prop == &Angle && inputType == App::PropertyFloatConstraint::getClassTypeId()) {
App::PropertyFloatConstraint v;
v.Restore(reader);
Angle.setValue(v.getValue());
}
else {
DressUp::handleChangedPropertyType(reader, TypeName, prop);
}
}
short Draft::mustExecute() const
{
if (Placement.isTouched() || Angle.isTouched() || NeutralPlane.isTouched()
|| PullDirection.isTouched() || Reversed.isTouched()) {
return 1;
}
return DressUp::mustExecute();
}
App::DocumentObjectExecReturn* Draft::execute()
{
// Get parameters
// Base shape
Part::TopoShape TopShape;
try {
TopShape = getBaseTopoShape();
}
catch (Base::Exception& e) {
return new App::DocumentObjectExecReturn(e.what());
}
// Faces where draft should be applied
// Note: Cannot be const reference currently because of BRepOffsetAPI_DraftAngle::Remove() bug,
// see below
std::vector<std::string> SubVals = Base.getSubValuesStartsWith("Face");
// If no element is selected, then we use a copy of previous feature.
if (SubVals.empty()) {
this->positionByBaseFeature();
this->Shape.setValue(TopShape);
return App::DocumentObject::StdReturn;
}
// Draft angle
double angle = Base::toRadians(Angle.getValue());
// Pull direction
gp_Dir pullDirection;
App::DocumentObject* refDirection = PullDirection.getValue();
if (refDirection) {
if (refDirection->isDerivedFrom<PartDesign::Line>()) {
PartDesign::Line* line = static_cast<PartDesign::Line*>(refDirection);
Base::Vector3d d = line->getDirection();
pullDirection = gp_Dir(d.x, d.y, d.z);
}
else if (refDirection->isDerivedFrom<App::Line>()) {
App::Line* line = static_cast<App::Line*>(refDirection);
Base::Vector3d d = line->getDirection();
pullDirection = gp_Dir(d.x, d.y, d.z);
}
else if (refDirection->isDerivedFrom<Part::Feature>()) {
std::vector<std::string> subStrings = PullDirection.getSubValues();
if (subStrings.empty() || subStrings[0].empty()) {
throw Base::ValueError("No pull direction reference specified");
}
Part::Feature* refFeature = static_cast<Part::Feature*>(refDirection);
Part::TopoShape refShape = refFeature->Shape.getShape();
TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());
if (ref.ShapeType() == TopAbs_EDGE) {
TopoDS_Edge refEdge = TopoDS::Edge(ref);
if (refEdge.IsNull()) {
throw Base::ValueError("Failed to extract pull direction reference edge");
}
BRepAdaptor_Curve adapt(refEdge);
if (adapt.GetType() != GeomAbs_Line) {
throw Base::TypeError("Pull direction reference edge must be linear");
}
pullDirection = adapt.Line().Direction();
}
else {
throw Base::TypeError("Pull direction reference must be an edge or a datum line");
}
}
else {
throw Base::TypeError(
"Pull direction reference must be an edge of a feature or a datum line"
);
}
TopLoc_Location invObjLoc = this->getLocation().Inverted();
pullDirection.Transform(invObjLoc.Transformation());
}
// Neutral plane
gp_Pln neutralPlane;
App::DocumentObject* refPlane = NeutralPlane.getValue();
if (!refPlane) {
// Try to guess a neutral plane from the first selected face
// Get edges of first selected face
TopoDS_Shape face = TopShape.getSubShape(SubVals[0].c_str());
TopTools_IndexedMapOfShape mapOfEdges;
TopExp::MapShapes(face, TopAbs_EDGE, mapOfEdges);
bool found = false;
for (int i = 1; i <= mapOfEdges.Extent(); i++) {
// Note: What happens if mapOfEdges(i) is the degenerated edge of a cone?
// But in that case the draft is not possible anyway!
BRepAdaptor_Curve c(TopoDS::Edge(mapOfEdges(i)));
gp_Pnt p1 = c.Value(c.FirstParameter());
gp_Pnt p2 = c.Value(c.LastParameter());
if (c.IsClosed()) {
// Edge is a circle or a circular arc (other types are not allowed for drafting)
if (c.GetType() == GeomAbs_Circle) {
neutralPlane = gp_Pln(p1, c.Circle().Axis().Direction());
found = true;
break;
}
}
else {
// Edge is linear
// Find midpoint of edge and create auxiliary plane through midpoint normal to edge
gp_Pnt pm = c.Value((c.FirstParameter() + c.LastParameter()) / 2.0);
Handle(Geom_Plane) aux
= new Geom_Plane(pm, gp_Dir(p2.X() - p1.X(), p2.Y() - p1.Y(), p2.Z() - p1.Z()));
// Intersect plane with face. Is there no easier way?
BRepAdaptor_Surface adapt(TopoDS::Face(face), Standard_False);
Handle(Geom_Surface) sf = adapt.Surface().Surface();
GeomAPI_IntSS intersector(aux, sf, Precision::Confusion());
if (!intersector.IsDone() || intersector.NbLines() < 1) {
continue;
}
Handle(Geom_Curve) icurve = intersector.Line(1);
if (!icurve->IsKind(STANDARD_TYPE(Geom_Line))) {
continue;
}
// TODO: How to extract the line from icurve without creating an edge first?
TopoDS_Edge edge = BRepBuilderAPI_MakeEdge(icurve);
BRepAdaptor_Curve c(edge);
neutralPlane = gp_Pln(pm, c.Line().Direction());
found = true;
break;
}
}
if (!found) {
throw Base::RuntimeError("No neutral plane specified and none can be guessed");
}
}
else {
if (refPlane->isDerivedFrom<PartDesign::Plane>()) {
PartDesign::Plane* plane = static_cast<PartDesign::Plane*>(refPlane);
Base::Vector3d b = plane->getBasePoint();
Base::Vector3d n = plane->getNormal();
neutralPlane = gp_Pln(gp_Pnt(b.x, b.y, b.z), gp_Dir(n.x, n.y, n.z));
}
else if (refPlane->isDerivedFrom<App::Plane>()
|| refPlane->isDerivedFrom<Part::Part2DObject>()) {
neutralPlane = Feature::makePlnFromPlane(refPlane);
}
else if (refPlane->isDerivedFrom<Part::Feature>()) {
std::vector<std::string> subStrings = NeutralPlane.getSubValues();
if (subStrings.empty() || subStrings[0].empty()) {
throw Base::ValueError("No neutral plane reference specified");
}
Part::Feature* refFeature = static_cast<Part::Feature*>(refPlane);
Part::TopoShape refShape = refFeature->Shape.getShape();
TopoDS_Shape ref = refShape.getSubShape(subStrings[0].c_str());
if (ref.ShapeType() == TopAbs_FACE) {
TopoDS_Face refFace = TopoDS::Face(ref);
if (refFace.IsNull()) {
throw Base::ValueError("Failed to extract neutral plane reference face");
}
BRepAdaptor_Surface adapt(refFace);
if (adapt.GetType() != GeomAbs_Plane) {
throw Base::TypeError("Neutral plane reference face must be planar");
}
neutralPlane = adapt.Plane();
}
else if (ref.ShapeType() == TopAbs_EDGE) {
if (refDirection) {
// Create neutral plane through edge normal to pull direction
TopoDS_Edge refEdge = TopoDS::Edge(ref);
if (refEdge.IsNull()) {
throw Base::ValueError("Failed to extract neutral plane reference edge");
}
BRepAdaptor_Curve c(refEdge);
if (c.GetType() != GeomAbs_Line) {
throw Base::TypeError("Neutral plane reference edge must be linear");
}
double a = c.Line().Angle(gp_Lin(c.Value(c.FirstParameter()), pullDirection));
if (std::fabs(a - std::numbers::pi / 2) > Precision::Confusion()) {
throw Base::ValueError(
"Neutral plane reference edge must be normal to pull direction"
);
}
neutralPlane = gp_Pln(c.Value(c.FirstParameter()), pullDirection);
}
else {
throw Base::TypeError(
"Neutral plane reference can only be an edge if pull direction is defined"
);
}
}
else {
throw Base::TypeError("Neutral plane reference must be a face");
}
}
else {
throw Base::TypeError("Neutral plane reference must be face of a feature or a datum plane");
}
TopLoc_Location invObjLoc = this->getLocation().Inverted();
neutralPlane.Transform(invObjLoc.Transformation());
}
if (!refDirection) {
// Choose pull direction normal to neutral plane
pullDirection = neutralPlane.Axis().Direction();
}
// Reversed pull direction
bool reversed = Reversed.getValue();
if (reversed) {
angle *= -1.0;
}
this->positionByBaseFeature();
// create an untransformed copy of the base shape
Part::TopoShape baseShape(TopShape);
baseShape.setTransform(Base::Matrix4D());
try {
std::vector<TopoShape> faces = getFaces(baseShape);
TopoShape shape({}, getDocument()->getStringHasher());
shape.makeElementDraft(baseShape, faces, pullDirection, angle, neutralPlane, reversed);
if (shape.isNull()) {
return new App::DocumentObjectExecReturn(
QT_TRANSLATE_NOOP("Exception", "Resulting shape is null")
);
}
if (!isSingleSolidRuleSatisfied(shape.getShape())) {
return new App::DocumentObjectExecReturn(QT_TRANSLATE_NOOP(
"Exception",
"Result has multiple solids: enable 'Allow Compound' in the active body."
));
}
this->Shape.setValue(getSolid(shape));
return App::DocumentObject::StdReturn;
}
catch (Standard_Failure& e) {
return new App::DocumentObjectExecReturn(e.GetMessageString());
}
}