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FreeCAD/src/Mod/Part/App/FeatureExtrusion.cpp
DeepSOIC 399cb4bda3 Part: Extrude: port to use FaceMaker 
For old documents, default to old behavior. For new objects, default to
use FaceMakerBullseye
2016-10-01 23:13:44 +03:00

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/***************************************************************************
* Copyright (c) 2008 Werner Mayer <wmayer[at]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 "PreCompiled.h"
#ifndef _PreComp_
# include <cmath>
# include <gp_Pln.hxx>
# include <gp_Trsf.hxx>
# include <BRepAdaptor_Surface.hxx>
# include <BRepAdaptor_Curve.hxx>
# include <BRepOffsetAPI_MakeOffset.hxx>
# include <BRepBuilderAPI_Copy.hxx>
# include <BRepBuilderAPI_MakeWire.hxx>
# include <BRepOffsetAPI_ThruSections.hxx>
# include <BRepPrimAPI_MakePrism.hxx>
# include <Precision.hxx>
# include <ShapeAnalysis.hxx>
# include <ShapeFix_Wire.hxx>
# include <TopoDS.hxx>
# include <TopoDS_Iterator.hxx>
# include <TopExp.hxx>
# include <TopExp_Explorer.hxx>
# include <TopTools_IndexedMapOfShape.hxx>
# include <BRepLib_FindSurface.hxx>
#endif
#include "FeatureExtrusion.h"
#include <Base/Tools.h>
#include <Base/Exception.h>
#include "Part2DObject.h"
using namespace Part;
PROPERTY_SOURCE(Part::Extrusion, Part::Feature)
const char* Extrusion::eDirModeStrings[]= {
"Custom",
"Edge",
"Normal",
NULL};
Extrusion::Extrusion()
{
ADD_PROPERTY_TYPE(Base,(0), "Extrude", App::Prop_None, "Shape to extrude");
ADD_PROPERTY_TYPE(Dir,(Base::Vector3d(0.0,0.0,1.0)), "Extrude", App::Prop_None, "Direction of extrusion (also magnitude, if both lengths are zero).");
ADD_PROPERTY_TYPE(DirMode, (dmCustom), "Extrude", App::Prop_None, "Sets, how Dir is updated.");
DirMode.setEnums(eDirModeStrings);
ADD_PROPERTY_TYPE(DirLink,(nullptr), "Extrude", App::Prop_None, "Link to edge defining extrusion direction.");
ADD_PROPERTY_TYPE(LengthFwd,(0.0), "Extrude", App::Prop_None, "Length of extrusion along direction. If both LengthFwd and LengthRev are zero, magnitude of Dir is used.");
ADD_PROPERTY_TYPE(LengthRev,(0.0), "Extrude", App::Prop_None, "Length of additional extrusion, against direction.");
ADD_PROPERTY_TYPE(Solid,(false), "Extrude", App::Prop_None, "If true, extruding a wire yeilds a solid. If false, a shell.");
ADD_PROPERTY_TYPE(Reversed,(false), "Extrude", App::Prop_None, "Set to true to swap the direction of extrusion.");
ADD_PROPERTY_TYPE(Symmetric,(false), "Extrude", App::Prop_None, "If true, extrusion is done in both directions to a total of LengthFwd. LengthRev is ignored.");
ADD_PROPERTY_TYPE(TaperAngle,(0.0), "Extrude", App::Prop_None, "Sets the angle of slope (draft) to apply to the sides. The angle is for outward taper; negative value yeilds inward tapering.");
ADD_PROPERTY_TYPE(TaperAngleRev,(0.0), "Extrude", App::Prop_None, "Taper angle of reverse part of extrusion.");
ADD_PROPERTY_TYPE(FaceMakerClass,("Part::FaceMakerExtrusion"), "Extrude", App::Prop_None, "If Solid is true, this sets the facemaker class to use when converting wires to faces. Otherwise, ignored."); //default for old documents. See setupObject for default for new extrusions.
}
short Extrusion::mustExecute() const
{
if (Base.isTouched() ||
Dir.isTouched() ||
DirMode.isTouched() ||
DirLink.isTouched() ||
LengthFwd.isTouched() ||
LengthRev.isTouched() ||
Solid.isTouched() ||
Reversed.isTouched() ||
Symmetric.isTouched() ||
TaperAngle.isTouched() ||
TaperAngleRev.isTouched() ||
FaceMakerClass.isTouched())
return 1;
return 0;
}
bool Extrusion::fetchAxisLink(const App::PropertyLinkSub& axisLink, Base::Vector3d& basepoint, Base::Vector3d& dir)
{
if (!axisLink.getValue())
return false;
if (!axisLink.getValue()->isDerivedFrom(Part::Feature::getClassTypeId()))
throw Base::TypeError("AxisLink has no OCC shape");
Part::Feature* linked = static_cast<Part::Feature*>(axisLink.getValue());
TopoDS_Shape axEdge;
if (axisLink.getSubValues().size() > 0 && axisLink.getSubValues()[0].length() > 0){
axEdge = linked->Shape.getShape().getSubShape(axisLink.getSubValues()[0].c_str());
} else {
axEdge = linked->Shape.getValue();
}
if (axEdge.IsNull())
throw Base::ValueError("DirLink shape is null");
if (axEdge.ShapeType() != TopAbs_EDGE)
throw Base::TypeError("DirLink shape is not an edge");
BRepAdaptor_Curve crv(TopoDS::Edge(axEdge));
gp_Pnt startpoint;
gp_Pnt endpoint;
if (crv.GetType() == GeomAbs_Line){
startpoint = crv.Value(crv.FirstParameter());
endpoint = crv.Value(crv.LastParameter());
if (axEdge.Orientation() == TopAbs_REVERSED)
std::swap(startpoint, endpoint);
} else {
throw Base::TypeError("DirLink edge is not a line.");
}
basepoint.Set(startpoint.X(), startpoint.Y(), startpoint.Z());
gp_Vec vec = gp_Vec(startpoint, endpoint);
dir.Set(vec.X(), vec.Y(), vec.Z());
return true;
}
Extrusion::ExtrusionParameters Extrusion::computeFinalParameters()
{
Extrusion::ExtrusionParameters result;
Base::Vector3d dir;
switch(this->DirMode.getValue()){
case dmCustom:
dir = this->Dir.getValue();
break;
case dmEdge:{
bool fetched;
Base::Vector3d base;
fetched = fetchAxisLink(this->DirLink, base, dir);
if (! fetched)
throw Base::Exception("DirMode is set to use edge, but no edge is linked.");
this->Dir.setValue(dir);
}break;
case dmNormal:
dir = calculateShapeNormal(this->Base);
this->Dir.setValue(dir);
break;
default:
throw Base::ValueError("Unexpected enum value");
}
if(dir.Length() < Precision::Confusion())
throw Base::ValueError("Direction is zero-length");
result.dir = gp_Dir(dir.x, dir.y, dir.z);
if (this->Reversed.getValue())
result.dir.Reverse();
result.lengthFwd = this->LengthFwd.getValue();
result.lengthRev = this->LengthRev.getValue();
if(fabs(result.lengthFwd) < Precision::Confusion()
&& fabs(result.lengthRev) < Precision::Confusion() ){
result.lengthFwd = dir.Length();
}
if (this->Symmetric.getValue()){
result.lengthRev = result.lengthFwd * 0.5;
result.lengthFwd = result.lengthFwd * 0.5;
}
if (fabs(result.lengthFwd + result.lengthRev) < Precision::Confusion())
throw Base::ValueError("Total length of extrusion is zero.");
result.solid = this->Solid.getValue();
result.taperAngleFwd = this->TaperAngle.getValue() * M_PI / 180.0;
if (fabs(result.taperAngleFwd) > M_PI * 0.5 - Precision::Angular() )
throw Base::ValueError("Magnitude of taper angle matches or exceeds 90 degrees. That is too much.");
result.taperAngleRev = this->TaperAngleRev.getValue() * M_PI / 180.0;
if (fabs(result.taperAngleRev) > M_PI * 0.5 - Precision::Angular() )
throw Base::ValueError("Magnitude of taper angle matches or exceeds 90 degrees. That is too much.");
result.faceMakerClass = this->FaceMakerClass.getValue();
return result;
}
Base::Vector3d Extrusion::calculateShapeNormal(const App::PropertyLink& shapeLink)
{
if (!shapeLink.getValue())
throw Base::Exception("calculateShapeNormal: link is empty");
const App::DocumentObject* docobj = shapeLink.getValue();
//special case for sketches and the like: no matter what shape they have, use their local Z axis.
if (docobj->isDerivedFrom(Part::Part2DObject::getClassTypeId())){
const Part::Part2DObject* p2do = static_cast<const Part::Part2DObject*>(docobj);
Base::Vector3d OZ (0.0, 0.0, 1.0);
Base::Vector3d result;
p2do->Placement.getValue().getRotation().multVec(OZ, result);
return result;
}
//extract the shape
if (! docobj->isDerivedFrom(Part::Feature::getClassTypeId()))
throw Base::TypeError("Linked object doesn't have shape.");
const TopoShape &tsh = static_cast<const Part::Feature*>(docobj)->Shape.getShape();
TopoDS_Shape sh = tsh.getShape();
if (sh.IsNull())
throw Base::Exception("calculateShapeNormal: link points to a valid object, but its shape is null.");
//find plane
BRepLib_FindSurface planeFinder(sh, -1, /*OnlyPlane=*/true);
if (! planeFinder.Found())
throw Base::ValueError("Can't find normal direction, because the shape is not on a plane.");
//find plane normal and return result.
GeomAdaptor_Surface surf(planeFinder.Surface());
gp_Dir normal = surf.Plane().Axis().Direction();
//now se know the plane. But if there are faces, the
//plane normal direction is not dependent on face orientation (because findPlane only uses egdes).
//let's fix that.
TopExp_Explorer ex(sh, TopAbs_FACE);
if(ex.More()) {
BRepAdaptor_Surface surf(TopoDS::Face(ex.Current()));
normal = surf.Plane().Axis().Direction();
if (ex.Current().Orientation() == TopAbs_REVERSED){
normal.Reverse();
}
}
return Base::Vector3d(normal.X(), normal.Y(), normal.Z());
}
TopoShape Extrusion::extrudeShape(const TopoShape source, Extrusion::ExtrusionParameters params)
{
TopoDS_Shape result;
gp_Vec vec = gp_Vec(params.dir).Multiplied(params.lengthFwd+params.lengthRev);//total vector of extrusion
if (std::fabs(params.taperAngleFwd) >= Precision::Angular() ||
std::fabs(params.taperAngleRev) >= Precision::Angular() ) {
//Tapered extrusion!
#if defined(__GNUC__) && defined (FC_OS_LINUX)
Base::SignalException se;
#endif
TopoDS_Shape myShape = source.getShape();
if (myShape.IsNull())
Standard_Failure::Raise("Cannot extrude empty shape");
// #0000910: Circles Extrude Only Surfaces, thus use BRepBuilderAPI_Copy
myShape = BRepBuilderAPI_Copy(myShape).Shape();
std::list<TopoDS_Shape> drafts;
makeDraft(params, myShape, drafts);
if (drafts.empty()) {
Standard_Failure::Raise("Drafting shape failed");
}
else if (drafts.size() == 1) {
result = drafts.front();
}
else {
TopoDS_Compound comp;
BRep_Builder builder;
builder.MakeCompound(comp);
for (std::list<TopoDS_Shape>::iterator it = drafts.begin(); it != drafts.end(); ++it)
builder.Add(comp, *it);
result = comp;
}
}
else {
//Regular (non-tapered) extrusion!
TopoDS_Shape myShape = source.getShape();
if (myShape.IsNull())
Standard_Failure::Raise("Cannot extrude empty shape");
// #0000910: Circles Extrude Only Surfaces, thus use BRepBuilderAPI_Copy
myShape = BRepBuilderAPI_Copy(myShape).Shape();
//apply reverse part of extrusion by shifting the source shape
if (fabs(params.lengthRev)>Precision::Confusion() ){
gp_Trsf mov;
mov.SetTranslation(gp_Vec(params.dir)*(-params.lengthRev));
TopLoc_Location loc(mov);
myShape.Move(loc);
}
//make faces from wires
if (params.solid) {
if (myShape.ShapeType() == TopAbs_FACE && params.faceMakerClass == "Part::FaceMakerExtrusion"){
//legacy exclusion: ignore "solid" if extruding a face.
} else {
//new strict behavior. If solid==True => make faces from wires, and if myShape not wires - fail!
std::unique_ptr<FaceMaker> fm_instance = FaceMaker::ConstructFromType(params.faceMakerClass.c_str());
FaceMaker* mkFace = &(*(fm_instance));
if(myShape.ShapeType() == TopAbs_COMPOUND)
mkFace->useCompound(TopoDS::Compound(myShape));
else
mkFace->addShape(myShape);
mkFace->Build();
myShape = mkFace->Shape();
}
}
//extrude!
BRepPrimAPI_MakePrism mkPrism(myShape, vec);
result = mkPrism.Shape();
}
if (result.IsNull())
throw Base::Exception("Result of extrusion is null shape.");
return TopoShape(result);
}
App::DocumentObjectExecReturn *Extrusion::execute(void)
{
App::DocumentObject* link = Base.getValue();
if (!link)
return new App::DocumentObjectExecReturn("No object linked");
if (!link->getTypeId().isDerivedFrom(Part::Feature::getClassTypeId()))
return new App::DocumentObjectExecReturn("Linked object is not a Part object");
Part::Feature *base = static_cast<Part::Feature*>(Base.getValue());
try {
Extrusion::ExtrusionParameters params = computeFinalParameters();
TopoShape result = extrudeShape(base->Shape.getShape(),params);
this->Shape.setValue(result);
return App::DocumentObject::StdReturn;
}
catch (Standard_Failure) {
Handle_Standard_Failure e = Standard_Failure::Caught();
return new App::DocumentObjectExecReturn(e->GetMessageString());
}
}
void Extrusion::makeDraft(ExtrusionParameters params, const TopoDS_Shape& shape, std::list<TopoDS_Shape>& drafts)
{
double distanceFwd = tan(params.taperAngleFwd)*params.lengthFwd;
double distanceRev = tan(params.taperAngleRev)*params.lengthRev;
gp_Vec vecFwd = gp_Vec(params.dir)*params.lengthFwd;
gp_Vec vecRev = gp_Vec(params.dir.Reversed())*params.lengthRev;
bool bFwd = fabs(params.lengthFwd) > Precision::Confusion();
bool bRev = fabs(params.lengthRev) > Precision::Confusion();
bool bMid = !bFwd || !bRev || params.lengthFwd*params.lengthRev > 0.0; //include the source shape as loft section?
TopoDS_Wire sourceWire;
if (shape.IsNull())
Standard_Failure::Raise("Not a valid shape");
if (shape.ShapeType() == TopAbs_WIRE) {
ShapeFix_Wire aFix;
aFix.Load(TopoDS::Wire(shape));
aFix.FixReorder();
aFix.FixConnected();
aFix.FixClosed();
sourceWire = aFix.Wire();
}
else if (shape.ShapeType() == TopAbs_FACE) {
TopoDS_Wire outerWire = ShapeAnalysis::OuterWire(TopoDS::Face(shape));
sourceWire = outerWire;
}
else if (shape.ShapeType() == TopAbs_COMPOUND) {
TopoDS_Iterator it(shape);
for (; it.More(); it.Next()) {
makeDraft(params, it.Value(), drafts);
}
}
else {
Standard_Failure::Raise("Only a wire or a face is supported");
}
if (!sourceWire.IsNull()) {
std::list<TopoDS_Wire> list_of_sections;
//first. add wire for reversed part of extrusion
if (bRev){
gp_Vec translation = vecRev;
double offset = distanceRev;
BRepOffsetAPI_MakeOffset mkOffset;
#if OCC_VERSION_HEX >= 0x060800
mkOffset.Init(GeomAbs_Arc);
#endif
#if OCC_VERSION_HEX >= 0x070000
mkOffset.Init(GeomAbs_Intersection);
#endif
gp_Trsf mat;
mat.SetTranslation(translation);
TopLoc_Location loc(mat);
TopoDS_Wire movedSourceWire = TopoDS::Wire(sourceWire.Moved(loc));
TopoDS_Shape offsetShape;
if (fabs(offset)>Precision::Confusion()){
mkOffset.AddWire(movedSourceWire);
mkOffset.Perform(offset);
offsetShape = mkOffset.Shape();
} else {
//stupid OCC doesn't understand, what to do when offset value is zero =/
offsetShape = movedSourceWire;
}
if (offsetShape.IsNull())
Standard_Failure::Raise("Tapered shape is empty");
TopAbs_ShapeEnum type = offsetShape.ShapeType();
if (type == TopAbs_WIRE) {
list_of_sections.push_back(TopoDS::Wire(offsetShape));
}
else if (type == TopAbs_EDGE) {
BRepBuilderAPI_MakeWire mkWire(TopoDS::Edge(offsetShape));
list_of_sections.push_back(mkWire.Wire());
}
else {
Standard_Failure::Raise("Tapered shape type is not supported");
}
}
//next. Add source wire as middle section. Order is important.
if (bMid){
list_of_sections.push_back(sourceWire);
}
//finally. Forward extrusion offset wire.
if (bFwd){
gp_Vec translation = vecFwd;
double offset = distanceFwd;
BRepOffsetAPI_MakeOffset mkOffset;
#if OCC_VERSION_HEX >= 0x060800
mkOffset.Init(GeomAbs_Arc);
#endif
#if OCC_VERSION_HEX >= 0x070000
mkOffset.Init(GeomAbs_Intersection);
#endif
gp_Trsf mat;
mat.SetTranslation(translation);
TopLoc_Location loc(mat);
TopoDS_Wire movedSourceWire = TopoDS::Wire(sourceWire.Moved(loc));
TopoDS_Shape offsetShape;
if (fabs(offset)>Precision::Confusion()){
mkOffset.AddWire(movedSourceWire);
mkOffset.Perform(offset);
offsetShape = mkOffset.Shape();
} else {
//stupid OCC doesn't understand, what to do when offset value is zero =/
offsetShape = movedSourceWire;
}
if (offsetShape.IsNull())
Standard_Failure::Raise("Tapered shape is empty");
TopAbs_ShapeEnum type = offsetShape.ShapeType();
if (type == TopAbs_WIRE) {
list_of_sections.push_back(TopoDS::Wire(offsetShape));
}
else if (type == TopAbs_EDGE) {
BRepBuilderAPI_MakeWire mkWire(TopoDS::Edge(offsetShape));
list_of_sections.push_back(mkWire.Wire());
}
else {
Standard_Failure::Raise("Tapered shape type is not supported");
}
}
//make loft
BRepOffsetAPI_ThruSections mkGenerator(params.solid ? Standard_True : Standard_False, /*ruled=*/Standard_True);
for (std::list<TopoDS_Wire>::const_iterator it = list_of_sections.begin(); it != list_of_sections.end(); ++it) {
const TopoDS_Wire &wire = *it;
mkGenerator.AddWire(wire);
}
try {
#if defined(__GNUC__) && defined (FC_OS_LINUX)
Base::SignalException se;
#endif
mkGenerator.Build();
drafts.push_back(mkGenerator.Shape());
}
catch (Standard_Failure &){
throw;
}
catch (...) {
throw Base::Exception("Unknown exception from BRepOffsetAPI_ThruSections");
}
}
}
//----------------------------------------------------------------
TYPESYSTEM_SOURCE(Part::FaceMakerExtrusion, Part::FaceMakerCheese);
std::string FaceMakerExtrusion::getUserFriendlyName() const
{
return std::string(QT_TRANSLATE_NOOP("Part_FaceMaker","Part Extrude facemaker"));
}
std::string FaceMakerExtrusion::getBriefExplanation() const
{
return std::string(QT_TRANSLATE_NOOP("Part_FaceMaker","Supports making faces with holes, does not support nesting."));
}
void FaceMakerExtrusion::Build()
{
this->NotDone();
this->myGenerated.Clear();
this->myShapesToReturn.clear();
this->myShape = TopoDS_Shape();
TopoDS_Shape inputShape;
if (mySourceShapes.empty())
throw Base::Exception("No input shapes!");
if (mySourceShapes.size() == 1){
inputShape = mySourceShapes[0];
} else {
TopoDS_Builder builder;
TopoDS_Compound cmp;
builder.MakeCompound(cmp);
for (const TopoDS_Shape& sh: mySourceShapes){
builder.Add(cmp, sh);
}
inputShape = cmp;
}
std::vector<TopoDS_Wire> wires;
TopTools_IndexedMapOfShape mapOfWires;
TopExp::MapShapes(inputShape, TopAbs_WIRE, mapOfWires);
// if there are no wires then check also for edges
if (mapOfWires.IsEmpty()) {
TopTools_IndexedMapOfShape mapOfEdges;
TopExp::MapShapes(inputShape, TopAbs_EDGE, mapOfEdges);
for (int i=1; i<=mapOfEdges.Extent(); i++) {
BRepBuilderAPI_MakeWire mkWire(TopoDS::Edge(mapOfEdges.FindKey(i)));
wires.push_back(mkWire.Wire());
}
}
else {
wires.reserve(mapOfWires.Extent());
for (int i=1; i<=mapOfWires.Extent(); i++) {
wires.push_back(TopoDS::Wire(mapOfWires.FindKey(i)));
}
}
if (!wires.empty()) {
//try {
TopoDS_Shape res = FaceMakerCheese::makeFace(wires);
if (!res.IsNull())
this->myShape = res;
//}
//catch (...) {
//}
}
this->Done();
}
void Part::Extrusion::setupObject()
{
Part::Feature::setupObject();
this->FaceMakerClass.setValue("Part::FaceMakerBullseye"); //default for newly created features
}
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