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FEM: add gitattributes file to let git manage file endings and normalize them

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Bernd Hahnebach
2019-12-10 22:13:03 +01:00
parent 97804f851d
commit e680701037
26 changed files with 4968 additions and 4906 deletions
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src/Mod/Fem/App/FemConstraint.cpp
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@@ -1,469 +1,469 @@
/***************************************************************************
* Copyright (c) 2013 Jan Rheinländer *
* <jrheinlaender[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 <math.h> //OvG: Required for log10
# include <TopoDS.hxx>
# include <BRepGProp_Face.hxx>
# include <gp_Vec.hxx>
# include <gp_Pnt.hxx>
# include <gp_Pln.hxx>
# include <gp_Cylinder.hxx>
# include <gp_Ax3.hxx>
# include <BRepAdaptor_Curve.hxx>
# include <GCPnts_AbscissaPoint.hxx>
# include <Adaptor3d_IsoCurve.hxx>
# include <Adaptor3d_HSurface.hxx>
# include <BRepAdaptor_HSurface.hxx>
# include <BRepAdaptor_Surface.hxx>
# include <GProp_GProps.hxx>
# include <BRepGProp.hxx>
# include <TopoDS_Vertex.hxx>
# include <BRepClass_FaceClassifier.hxx>
# include <BRep_Tool.hxx>
# include <BRepGProp_Face.hxx>
# include <ShapeAnalysis.hxx>
# include <GeomAPI_ProjectPointOnSurf.hxx>
# include <GeomAPI_IntCS.hxx>
# include <Geom_Plane.hxx>
# include <Geom_Line.hxx>
# include <Precision.hxx>
#endif
#include "FemConstraint.h"
#include "FemTools.h"
#include <App/DocumentObjectPy.h>
#include <App/FeaturePythonPyImp.h>
#include <Mod/Part/App/PartFeature.h>
#include <Base/Console.h>
#include <Base/Exception.h>
using namespace Fem;
// maybe in the c++ standard later, older compiler don't have round()
#if _MSC_VER <= 1700
double round(double r) {
return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
}
#endif
PROPERTY_SOURCE(Fem::Constraint, App::DocumentObject)
Constraint::Constraint()
{
ADD_PROPERTY_TYPE(References,(0,0),"Constraint",(App::PropertyType)(App::Prop_None),"Elements where the constraint is applied");
ADD_PROPERTY_TYPE(NormalDirection,(Base::Vector3d(0,0,1)),"Constraint",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),"Normal direction pointing outside of solid");
ADD_PROPERTY_TYPE(Scale,(1),"Base",App::PropertyType(App::Prop_Output),"Scale used for drawing constraints"); //OvG: Add scale parameter inherited by all derived constraints
References.setScope(App::LinkScope::Global);
}
Constraint::~Constraint()
{
}
App::DocumentObjectExecReturn *Constraint::execute(void)
{
References.touch();
Scale.touch();
return StdReturn;
}
//OvG: Provide the ability to determine how big to draw constraint arrows etc.
int Constraint::calcDrawScaleFactor(double lparam) const
{
return ((int)round(log(lparam)*log(lparam)*log(lparam)/10)>1)?((int)round(log(lparam)*log(lparam)*log(lparam)/10)):1;
}
int Constraint::calcDrawScaleFactor(double lvparam, double luparam) const
{
return calcDrawScaleFactor((lvparam+luparam)/2.0);
}
int Constraint::calcDrawScaleFactor() const
{
return 1;
}
#define CONSTRAINTSTEPLIMIT 50
void Constraint::onChanged(const App::Property* prop)
{
if (prop == &References) {
// If References are changed, recalculate the normal direction. If no useful reference is found,
// use z axis or previous value. If several faces are selected, only the first one is used
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
// Extract geometry from References
TopoDS_Shape sh;
for (std::size_t i = 0; i < Objects.size(); i++) {
App::DocumentObject* obj = Objects[i];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (!toposhape.getShape().IsNull()) {
sh = toposhape.getSubShape(SubElements[i].c_str());
if (sh.ShapeType() == TopAbs_FACE) {
// Get face normal in center point
TopoDS_Face face = TopoDS::Face(sh);
BRepGProp_Face props(face);
gp_Vec normal;
gp_Pnt center;
double u1,u2,v1,v2;
props.Bounds(u1,u2,v1,v2);
props.Normal((u1+u2)/2.0,(v1+v2)/2.0,center,normal);
normal.Normalize();
NormalDirection.setValue(normal.X(), normal.Y(), normal.Z());
// One face is enough...
App::DocumentObject::onChanged(prop);
return;
}
}
}
}
App::DocumentObject::onChanged(prop);
}
void Constraint::onDocumentRestored()
{
// This seems to be the only way to make the ViewProvider display the constraint
References.touch();
App::DocumentObject::onDocumentRestored();
}
bool Constraint::getPoints(std::vector<Base::Vector3d> &points, std::vector<Base::Vector3d> &normals, int * scale) const
{
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
// Extract geometry from References
TopoDS_Shape sh;
for (std::size_t i = 0; i < Objects.size(); i++) {
App::DocumentObject* obj = Objects[i];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (toposhape.isNull())
return false;
sh = toposhape.getSubShape(SubElements[i].c_str());
if (sh.ShapeType() == TopAbs_VERTEX) {
const TopoDS_Vertex& vertex = TopoDS::Vertex(sh);
gp_Pnt p = BRep_Tool::Pnt(vertex);
points.emplace_back(p.X(), p.Y(), p.Z());
normals.push_back(NormalDirection.getValue());
//OvG: Scale by whole object mass in case of a vertex
GProp_GProps props;
BRepGProp::VolumeProperties(toposhape.getShape(), props);
double lx = props.Mass();
*scale = this->calcDrawScaleFactor(sqrt(lx)*0.5); //OvG: setup draw scale for constraint
}
else if (sh.ShapeType() == TopAbs_EDGE) {
BRepAdaptor_Curve curve(TopoDS::Edge(sh));
double fp = curve.FirstParameter();
double lp = curve.LastParameter();
GProp_GProps props;
BRepGProp::LinearProperties(TopoDS::Edge(sh), props);
double l = props.Mass();
// Create points with 10 units distance, but at least one at the beginning and end of the edge
int steps;
if (l >= 30) //OvG: Increase 10 units distance proportionately to l for larger objects.
{
*scale = this->calcDrawScaleFactor(l); //OvG: setup draw scale for constraint
steps = (int)round(l / (10*( *scale)));
steps = steps<3?3:steps;
}
else if (l >= 20)
{
steps = (int)round(l / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
steps = 1;
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
steps = steps>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:steps; //OvG: Place upper limit on number of steps
double step = (lp - fp) / steps;
for (int i = 0; i < steps + 1; i++) {
// Parameter values must be in the range [fp, lp] (#0003683)
gp_Pnt p = curve.Value(fp + i * step);
points.emplace_back(p.X(), p.Y(), p.Z());
normals.push_back(NormalDirection.getValue());
}
}
else if (sh.ShapeType() == TopAbs_FACE) {
TopoDS_Face face = TopoDS::Face(sh);
// Surface boundaries
BRepAdaptor_Surface surface(face);
double ufp = surface.FirstUParameter();
double ulp = surface.LastUParameter();
double vfp = surface.FirstVParameter();
double vlp = surface.LastVParameter();
double l;
double lv, lu;
// Surface normals
BRepGProp_Face props(face);
gp_Vec normal;
gp_Pnt center;
// Get an estimate for the number of arrows by finding the average length of curves
Handle(Adaptor3d_HSurface) hsurf;
hsurf = new BRepAdaptor_HSurface(surface);
Adaptor3d_IsoCurve isoc(hsurf);
try {
isoc.Load(GeomAbs_IsoU, ufp);
l = GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion());
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vfp);
gp_Pnt p2 = hsurf->Value(ufp, vlp);
l = p1.Distance(p2);
}
try {
isoc.Load(GeomAbs_IsoU, ulp);
lv = (l + GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion()))/2.0;
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ulp, vfp);
gp_Pnt p2 = hsurf->Value(ulp, vlp);
lv = (l + p1.Distance(p2))/2.0;
}
try {
isoc.Load(GeomAbs_IsoV, vfp);
l = GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion());
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vfp);
gp_Pnt p2 = hsurf->Value(ulp, vfp);
l = p1.Distance(p2);
}
try {
isoc.Load(GeomAbs_IsoV, vlp);
lu = (l + GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion()))/2.0;
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vlp);
gp_Pnt p2 = hsurf->Value(ulp, vlp);
lu = (l + p1.Distance(p2))/2.0;
}
int stepsv;
if (lv >= 30) //OvG: Increase 10 units distance proportionately to lv for larger objects.
{
*scale = this->calcDrawScaleFactor(lv,lu); //OvG: setup draw scale for constraint
stepsv = (int)round(lv / (10*( *scale)));
stepsv = stepsv<3?3:stepsv;
}
else if (lv >= 20.0)
{
stepsv = (int)round(lv / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
stepsv = 2; // Minimum of three arrows to ensure (as much as possible) that at least one is displayed
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
stepsv = stepsv>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:stepsv; //OvG: Place upper limit on number of steps
int stepsu;
if (lu >= 30) //OvG: Increase 10 units distance proportionately to lu for larger objects.
{
*scale = this->calcDrawScaleFactor(lv,lu); //OvG: setup draw scale for constraint
stepsu = (int)round(lu / (10*( *scale)));
stepsu = stepsu<3?3:stepsu;
}
else if (lu >= 20.0)
{
stepsu = (int)round(lu / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
stepsu = 2;
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
stepsu = stepsu>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:stepsu; //OvG: Place upper limit on number of steps
double stepv = (vlp - vfp) / stepsv;
double stepu = (ulp - ufp) / stepsu;
// Create points and normals
for (int i = 0; i < stepsv + 1; i++) {
for (int j = 0; j < stepsu + 1; j++) {
double v = vfp + i * stepv;
double u = ufp + j * stepu;
gp_Pnt p = surface.Value(u, v);
BRepClass_FaceClassifier classifier(face, p, Precision::Confusion());
if (classifier.State() != TopAbs_OUT) {
points.emplace_back(p.X(), p.Y(), p.Z());
props.Normal(u, v,center,normal);
normal.Normalize();
normals.emplace_back(normal.X(), normal.Y(), normal.Z());
}
}
}
}
}
return true;
}
bool Constraint::getCylinder(double &radius, double &height, Base::Vector3d& base, Base::Vector3d& axis) const
{
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
if (Objects.empty())
return false;
App::DocumentObject* obj = Objects[0];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (toposhape.isNull())
return false;
TopoDS_Shape sh = toposhape.getSubShape(SubElements[0].c_str());
TopoDS_Face face = TopoDS::Face(sh);
BRepAdaptor_Surface surface(face);
gp_Cylinder cyl = surface.Cylinder();
gp_Pnt start = surface.Value(surface.FirstUParameter(), surface.FirstVParameter());
gp_Pnt end = surface.Value(surface.FirstUParameter(), surface.LastVParameter());
height = start.Distance(end);
radius = cyl.Radius();
gp_Pnt b = cyl.Location();
base = Base::Vector3d(b.X(), b.Y(), b.Z());
gp_Dir dir = cyl.Axis().Direction();
axis = Base::Vector3d(dir.X(), dir.Y(), dir.Z());
return true;
}
Base::Vector3d Constraint::getBasePoint(const Base::Vector3d& base, const Base::Vector3d& axis,
const App::PropertyLinkSub& location, const double& dist)
{
// Get the point specified by Location and Distance
App::DocumentObject* objLoc = location.getValue();
std::vector<std::string> names = location.getSubValues();
if (names.size() == 0)
return Base::Vector3d(0,0,0);
std::string subName = names.front();
Part::Feature* featLoc = static_cast<Part::Feature*>(objLoc);
TopoDS_Shape shloc = featLoc->Shape.getShape().getSubShape(subName.c_str());
// Get a plane from the Location reference
gp_Pln plane;
gp_Dir cylaxis(axis.x, axis.y, axis.z);
if (shloc.ShapeType() == TopAbs_FACE) {
BRepAdaptor_Surface surface(TopoDS::Face(shloc));
plane = surface.Plane();
} else {
BRepAdaptor_Curve curve(TopoDS::Edge(shloc));
gp_Lin line = curve.Line();
gp_Dir tang = line.Direction().Crossed(cylaxis);
gp_Dir norm = line.Direction().Crossed(tang);
plane = gp_Pln(line.Location(), norm);
}
// Translate the plane in direction of the cylinder (for positive values of Distance)
Handle(Geom_Plane) pln = new Geom_Plane(plane);
gp_Pnt cylbase(base.x, base.y, base.z);
GeomAPI_ProjectPointOnSurf proj(cylbase, pln);
if (!proj.IsDone())
return Base::Vector3d(0,0,0);
gp_Pnt projPnt = proj.NearestPoint();
if ((fabs(dist) > Precision::Confusion()) && (projPnt.IsEqual(cylbase, Precision::Confusion()) == Standard_False))
plane.Translate(gp_Vec(projPnt, cylbase).Normalized().Multiplied(dist));
Handle(Geom_Plane) plnt = new Geom_Plane(plane);
// Intersect translated plane with cylinder axis
Handle(Geom_Curve) crv = new Geom_Line(cylbase, cylaxis);
GeomAPI_IntCS intersector(crv, plnt);
if (!intersector.IsDone())
return Base::Vector3d(0,0,0);
gp_Pnt inter = intersector.Point(1);
return Base::Vector3d(inter.X(), inter.Y(), inter.Z());
}
const Base::Vector3d Constraint::getDirection(const App::PropertyLinkSub &direction)
{
App::DocumentObject* obj = direction.getValue();
std::vector<std::string> names = direction.getSubValues();
if (names.size() == 0)
return Base::Vector3d(0,0,0);
std::string subName = names.front();
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& shape = feat->Shape.getShape();
if (shape.isNull())
return Base::Vector3d(0,0,0);
TopoDS_Shape sh;
try {
sh = shape.getSubShape(subName.c_str());
}
catch (Standard_Failure&) {
std::stringstream str;
str << "No such sub-element '" << subName << "'";
throw Base::AttributeError(str.str());
}
return Fem::Tools::getDirectionFromShape(sh);
}
// Python feature ---------------------------------------------------------
namespace App {
/// @cond DOXERR
PROPERTY_SOURCE_TEMPLATE(Fem::ConstraintPython, Fem::Constraint)
template<> const char* Fem::ConstraintPython::getViewProviderName(void) const {
return "FemGui::ViewProviderFemConstraintPython";
}
template<> PyObject* Fem::ConstraintPython::getPyObject(void) {
if (PythonObject.is(Py::_None())) {
// ref counter is set to 1
PythonObject = Py::Object(new App::FeaturePythonPyT<App::DocumentObjectPy>(this),true);
}
return Py::new_reference_to(PythonObject);
}
// explicit template instantiation
template class AppFemExport FeaturePythonT<Fem::Constraint>;
/// @endcond
}
/***************************************************************************
* Copyright (c) 2013 Jan Rheinländer *
* <jrheinlaender[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 <math.h> //OvG: Required for log10
# include <TopoDS.hxx>
# include <BRepGProp_Face.hxx>
# include <gp_Vec.hxx>
# include <gp_Pnt.hxx>
# include <gp_Pln.hxx>
# include <gp_Cylinder.hxx>
# include <gp_Ax3.hxx>
# include <BRepAdaptor_Curve.hxx>
# include <GCPnts_AbscissaPoint.hxx>
# include <Adaptor3d_IsoCurve.hxx>
# include <Adaptor3d_HSurface.hxx>
# include <BRepAdaptor_HSurface.hxx>
# include <BRepAdaptor_Surface.hxx>
# include <GProp_GProps.hxx>
# include <BRepGProp.hxx>
# include <TopoDS_Vertex.hxx>
# include <BRepClass_FaceClassifier.hxx>
# include <BRep_Tool.hxx>
# include <BRepGProp_Face.hxx>
# include <ShapeAnalysis.hxx>
# include <GeomAPI_ProjectPointOnSurf.hxx>
# include <GeomAPI_IntCS.hxx>
# include <Geom_Plane.hxx>
# include <Geom_Line.hxx>
# include <Precision.hxx>
#endif
#include "FemConstraint.h"
#include "FemTools.h"
#include <App/DocumentObjectPy.h>
#include <App/FeaturePythonPyImp.h>
#include <Mod/Part/App/PartFeature.h>
#include <Base/Console.h>
#include <Base/Exception.h>
using namespace Fem;
// maybe in the c++ standard later, older compiler don't have round()
#if _MSC_VER <= 1700
double round(double r) {
return (r > 0.0) ? floor(r + 0.5) : ceil(r - 0.5);
}
#endif
PROPERTY_SOURCE(Fem::Constraint, App::DocumentObject)
Constraint::Constraint()
{
ADD_PROPERTY_TYPE(References,(0,0),"Constraint",(App::PropertyType)(App::Prop_None),"Elements where the constraint is applied");
ADD_PROPERTY_TYPE(NormalDirection,(Base::Vector3d(0,0,1)),"Constraint",App::PropertyType(App::Prop_ReadOnly|App::Prop_Output),"Normal direction pointing outside of solid");
ADD_PROPERTY_TYPE(Scale,(1),"Base",App::PropertyType(App::Prop_Output),"Scale used for drawing constraints"); //OvG: Add scale parameter inherited by all derived constraints
References.setScope(App::LinkScope::Global);
}
Constraint::~Constraint()
{
}
App::DocumentObjectExecReturn *Constraint::execute(void)
{
References.touch();
Scale.touch();
return StdReturn;
}
//OvG: Provide the ability to determine how big to draw constraint arrows etc.
int Constraint::calcDrawScaleFactor(double lparam) const
{
return ((int)round(log(lparam)*log(lparam)*log(lparam)/10)>1)?((int)round(log(lparam)*log(lparam)*log(lparam)/10)):1;
}
int Constraint::calcDrawScaleFactor(double lvparam, double luparam) const
{
return calcDrawScaleFactor((lvparam+luparam)/2.0);
}
int Constraint::calcDrawScaleFactor() const
{
return 1;
}
#define CONSTRAINTSTEPLIMIT 50
void Constraint::onChanged(const App::Property* prop)
{
if (prop == &References) {
// If References are changed, recalculate the normal direction. If no useful reference is found,
// use z axis or previous value. If several faces are selected, only the first one is used
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
// Extract geometry from References
TopoDS_Shape sh;
for (std::size_t i = 0; i < Objects.size(); i++) {
App::DocumentObject* obj = Objects[i];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (!toposhape.getShape().IsNull()) {
sh = toposhape.getSubShape(SubElements[i].c_str());
if (sh.ShapeType() == TopAbs_FACE) {
// Get face normal in center point
TopoDS_Face face = TopoDS::Face(sh);
BRepGProp_Face props(face);
gp_Vec normal;
gp_Pnt center;
double u1,u2,v1,v2;
props.Bounds(u1,u2,v1,v2);
props.Normal((u1+u2)/2.0,(v1+v2)/2.0,center,normal);
normal.Normalize();
NormalDirection.setValue(normal.X(), normal.Y(), normal.Z());
// One face is enough...
App::DocumentObject::onChanged(prop);
return;
}
}
}
}
App::DocumentObject::onChanged(prop);
}
void Constraint::onDocumentRestored()
{
// This seems to be the only way to make the ViewProvider display the constraint
References.touch();
App::DocumentObject::onDocumentRestored();
}
bool Constraint::getPoints(std::vector<Base::Vector3d> &points, std::vector<Base::Vector3d> &normals, int * scale) const
{
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
// Extract geometry from References
TopoDS_Shape sh;
for (std::size_t i = 0; i < Objects.size(); i++) {
App::DocumentObject* obj = Objects[i];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (toposhape.isNull())
return false;
sh = toposhape.getSubShape(SubElements[i].c_str());
if (sh.ShapeType() == TopAbs_VERTEX) {
const TopoDS_Vertex& vertex = TopoDS::Vertex(sh);
gp_Pnt p = BRep_Tool::Pnt(vertex);
points.emplace_back(p.X(), p.Y(), p.Z());
normals.push_back(NormalDirection.getValue());
//OvG: Scale by whole object mass in case of a vertex
GProp_GProps props;
BRepGProp::VolumeProperties(toposhape.getShape(), props);
double lx = props.Mass();
*scale = this->calcDrawScaleFactor(sqrt(lx)*0.5); //OvG: setup draw scale for constraint
}
else if (sh.ShapeType() == TopAbs_EDGE) {
BRepAdaptor_Curve curve(TopoDS::Edge(sh));
double fp = curve.FirstParameter();
double lp = curve.LastParameter();
GProp_GProps props;
BRepGProp::LinearProperties(TopoDS::Edge(sh), props);
double l = props.Mass();
// Create points with 10 units distance, but at least one at the beginning and end of the edge
int steps;
if (l >= 30) //OvG: Increase 10 units distance proportionately to l for larger objects.
{
*scale = this->calcDrawScaleFactor(l); //OvG: setup draw scale for constraint
steps = (int)round(l / (10*( *scale)));
steps = steps<3?3:steps;
}
else if (l >= 20)
{
steps = (int)round(l / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
steps = 1;
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
steps = steps>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:steps; //OvG: Place upper limit on number of steps
double step = (lp - fp) / steps;
for (int i = 0; i < steps + 1; i++) {
// Parameter values must be in the range [fp, lp] (#0003683)
gp_Pnt p = curve.Value(fp + i * step);
points.emplace_back(p.X(), p.Y(), p.Z());
normals.push_back(NormalDirection.getValue());
}
}
else if (sh.ShapeType() == TopAbs_FACE) {
TopoDS_Face face = TopoDS::Face(sh);
// Surface boundaries
BRepAdaptor_Surface surface(face);
double ufp = surface.FirstUParameter();
double ulp = surface.LastUParameter();
double vfp = surface.FirstVParameter();
double vlp = surface.LastVParameter();
double l;
double lv, lu;
// Surface normals
BRepGProp_Face props(face);
gp_Vec normal;
gp_Pnt center;
// Get an estimate for the number of arrows by finding the average length of curves
Handle(Adaptor3d_HSurface) hsurf;
hsurf = new BRepAdaptor_HSurface(surface);
Adaptor3d_IsoCurve isoc(hsurf);
try {
isoc.Load(GeomAbs_IsoU, ufp);
l = GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion());
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vfp);
gp_Pnt p2 = hsurf->Value(ufp, vlp);
l = p1.Distance(p2);
}
try {
isoc.Load(GeomAbs_IsoU, ulp);
lv = (l + GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion()))/2.0;
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ulp, vfp);
gp_Pnt p2 = hsurf->Value(ulp, vlp);
lv = (l + p1.Distance(p2))/2.0;
}
try {
isoc.Load(GeomAbs_IsoV, vfp);
l = GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion());
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vfp);
gp_Pnt p2 = hsurf->Value(ulp, vfp);
l = p1.Distance(p2);
}
try {
isoc.Load(GeomAbs_IsoV, vlp);
lu = (l + GCPnts_AbscissaPoint::Length(isoc, Precision::Confusion()))/2.0;
}
catch (const Standard_Failure&) {
gp_Pnt p1 = hsurf->Value(ufp, vlp);
gp_Pnt p2 = hsurf->Value(ulp, vlp);
lu = (l + p1.Distance(p2))/2.0;
}
int stepsv;
if (lv >= 30) //OvG: Increase 10 units distance proportionately to lv for larger objects.
{
*scale = this->calcDrawScaleFactor(lv,lu); //OvG: setup draw scale for constraint
stepsv = (int)round(lv / (10*( *scale)));
stepsv = stepsv<3?3:stepsv;
}
else if (lv >= 20.0)
{
stepsv = (int)round(lv / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
stepsv = 2; // Minimum of three arrows to ensure (as much as possible) that at least one is displayed
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
stepsv = stepsv>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:stepsv; //OvG: Place upper limit on number of steps
int stepsu;
if (lu >= 30) //OvG: Increase 10 units distance proportionately to lu for larger objects.
{
*scale = this->calcDrawScaleFactor(lv,lu); //OvG: setup draw scale for constraint
stepsu = (int)round(lu / (10*( *scale)));
stepsu = stepsu<3?3:stepsu;
}
else if (lu >= 20.0)
{
stepsu = (int)round(lu / 10);
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
else
{
stepsu = 2;
*scale = this->calcDrawScaleFactor(); //OvG: setup draw scale for constraint
}
stepsu = stepsu>CONSTRAINTSTEPLIMIT?CONSTRAINTSTEPLIMIT:stepsu; //OvG: Place upper limit on number of steps
double stepv = (vlp - vfp) / stepsv;
double stepu = (ulp - ufp) / stepsu;
// Create points and normals
for (int i = 0; i < stepsv + 1; i++) {
for (int j = 0; j < stepsu + 1; j++) {
double v = vfp + i * stepv;
double u = ufp + j * stepu;
gp_Pnt p = surface.Value(u, v);
BRepClass_FaceClassifier classifier(face, p, Precision::Confusion());
if (classifier.State() != TopAbs_OUT) {
points.emplace_back(p.X(), p.Y(), p.Z());
props.Normal(u, v,center,normal);
normal.Normalize();
normals.emplace_back(normal.X(), normal.Y(), normal.Z());
}
}
}
}
}
return true;
}
bool Constraint::getCylinder(double &radius, double &height, Base::Vector3d& base, Base::Vector3d& axis) const
{
std::vector<App::DocumentObject*> Objects = References.getValues();
std::vector<std::string> SubElements = References.getSubValues();
if (Objects.empty())
return false;
App::DocumentObject* obj = Objects[0];
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& toposhape = feat->Shape.getShape();
if (toposhape.isNull())
return false;
TopoDS_Shape sh = toposhape.getSubShape(SubElements[0].c_str());
TopoDS_Face face = TopoDS::Face(sh);
BRepAdaptor_Surface surface(face);
gp_Cylinder cyl = surface.Cylinder();
gp_Pnt start = surface.Value(surface.FirstUParameter(), surface.FirstVParameter());
gp_Pnt end = surface.Value(surface.FirstUParameter(), surface.LastVParameter());
height = start.Distance(end);
radius = cyl.Radius();
gp_Pnt b = cyl.Location();
base = Base::Vector3d(b.X(), b.Y(), b.Z());
gp_Dir dir = cyl.Axis().Direction();
axis = Base::Vector3d(dir.X(), dir.Y(), dir.Z());
return true;
}
Base::Vector3d Constraint::getBasePoint(const Base::Vector3d& base, const Base::Vector3d& axis,
const App::PropertyLinkSub& location, const double& dist)
{
// Get the point specified by Location and Distance
App::DocumentObject* objLoc = location.getValue();
std::vector<std::string> names = location.getSubValues();
if (names.size() == 0)
return Base::Vector3d(0,0,0);
std::string subName = names.front();
Part::Feature* featLoc = static_cast<Part::Feature*>(objLoc);
TopoDS_Shape shloc = featLoc->Shape.getShape().getSubShape(subName.c_str());
// Get a plane from the Location reference
gp_Pln plane;
gp_Dir cylaxis(axis.x, axis.y, axis.z);
if (shloc.ShapeType() == TopAbs_FACE) {
BRepAdaptor_Surface surface(TopoDS::Face(shloc));
plane = surface.Plane();
} else {
BRepAdaptor_Curve curve(TopoDS::Edge(shloc));
gp_Lin line = curve.Line();
gp_Dir tang = line.Direction().Crossed(cylaxis);
gp_Dir norm = line.Direction().Crossed(tang);
plane = gp_Pln(line.Location(), norm);
}
// Translate the plane in direction of the cylinder (for positive values of Distance)
Handle(Geom_Plane) pln = new Geom_Plane(plane);
gp_Pnt cylbase(base.x, base.y, base.z);
GeomAPI_ProjectPointOnSurf proj(cylbase, pln);
if (!proj.IsDone())
return Base::Vector3d(0,0,0);
gp_Pnt projPnt = proj.NearestPoint();
if ((fabs(dist) > Precision::Confusion()) && (projPnt.IsEqual(cylbase, Precision::Confusion()) == Standard_False))
plane.Translate(gp_Vec(projPnt, cylbase).Normalized().Multiplied(dist));
Handle(Geom_Plane) plnt = new Geom_Plane(plane);
// Intersect translated plane with cylinder axis
Handle(Geom_Curve) crv = new Geom_Line(cylbase, cylaxis);
GeomAPI_IntCS intersector(crv, plnt);
if (!intersector.IsDone())
return Base::Vector3d(0,0,0);
gp_Pnt inter = intersector.Point(1);
return Base::Vector3d(inter.X(), inter.Y(), inter.Z());
}
const Base::Vector3d Constraint::getDirection(const App::PropertyLinkSub &direction)
{
App::DocumentObject* obj = direction.getValue();
std::vector<std::string> names = direction.getSubValues();
if (names.size() == 0)
return Base::Vector3d(0,0,0);
std::string subName = names.front();
Part::Feature* feat = static_cast<Part::Feature*>(obj);
const Part::TopoShape& shape = feat->Shape.getShape();
if (shape.isNull())
return Base::Vector3d(0,0,0);
TopoDS_Shape sh;
try {
sh = shape.getSubShape(subName.c_str());
}
catch (Standard_Failure&) {
std::stringstream str;
str << "No such sub-element '" << subName << "'";
throw Base::AttributeError(str.str());
}
return Fem::Tools::getDirectionFromShape(sh);
}
// Python feature ---------------------------------------------------------
namespace App {
/// @cond DOXERR
PROPERTY_SOURCE_TEMPLATE(Fem::ConstraintPython, Fem::Constraint)
template<> const char* Fem::ConstraintPython::getViewProviderName(void) const {
return "FemGui::ViewProviderFemConstraintPython";
}
template<> PyObject* Fem::ConstraintPython::getPyObject(void) {
if (PythonObject.is(Py::_None())) {
// ref counter is set to 1
PythonObject = Py::Object(new App::FeaturePythonPyT<App::DocumentObjectPy>(this),true);
}
return Py::new_reference_to(PythonObject);
}
// explicit template instantiation
template class AppFemExport FeaturePythonT<Fem::Constraint>;
/// @endcond
}