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d2d927e76054a77b96c508375e1f44f0e0628111
create/src/Mod/TechDraw/App/DrawProjectSplit.cpp
wmayer d2d927e760 performance improvements 
+ use const-reference as argument to avoid tmp. copy
+ use prefix incremation operator instead of postfix increment operator
2016-11-08 13:51:22 +01:00

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/***************************************************************************
* Copyright (c) WandererFan (wandererfan@gmail.com) 2016 *
* *
* 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 <sstream>
#include <BRep_Tool.hxx>
#include <BRepGProp.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeWire.hxx>
#include <BRepBuilderAPI_Copy.hxx>
#include <BRepLProp_CurveTool.hxx>
#include <BRepLProp_CLProps.hxx>
#include <BRepExtrema_DistShapeShape.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <BRepBndLib.hxx>
#include <Bnd_Box.hxx>
#include <Geom_Curve.hxx>
#include <GeomAPI_ProjectPointOnCurve.hxx>
#include <GProp_GProps.hxx>
#include <gp_Ax2.hxx>
#include <gp_Pnt.hxx>
#include <gp_Dir.hxx>
#include <gp_Pln.hxx>
#include <gp_XYZ.hxx>
#include <HLRBRep_Algo.hxx>
#include <HLRAlgo_Projector.hxx>
#include <HLRBRep_ShapeBounds.hxx>
#include <HLRBRep_HLRToShape.hxx>
#include <ShapeFix_ShapeTolerance.hxx>
#include <ShapeExtend_WireData.hxx>
#include <ShapeFix_Wire.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Face.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_IndexedMapOfShape.hxx>
#endif
#include <limits>
#include <algorithm>
#include <cmath>
#include <GeomLib_Tool.hxx>
#include <App/Application.h>
#include <Base/BoundBox.h>
#include <Base/Console.h>
#include <Base/Exception.h>
#include <Base/FileInfo.h>
#include <Base/Parameter.h>
#include <Mod/Part/App/PartFeature.h>
#include "DrawUtil.h"
#include "Geometry.h"
#include "GeometryObject.h"
#include "DrawProjectSplit.h"
#include "DrawHatch.h"
#include "EdgeWalker.h"
//#include <Mod/TechDraw/App/DrawProjectSplitPy.h> // generated from DrawProjectSplitPy.xml
using namespace TechDraw;
using namespace std;
//===========================================================================
// DrawProjectSplit
//===========================================================================
DrawProjectSplit::DrawProjectSplit()
{
}
DrawProjectSplit::~DrawProjectSplit()
{
}
std::vector<TopoDS_Edge> DrawProjectSplit::getEdgesForWalker(TopoDS_Shape shape, double scale, Base::Vector3d direction)
{
std::vector<TopoDS_Edge> result;
if (shape.IsNull()) {
return result;
}
BRepBuilderAPI_Copy BuilderCopy(shape);
TopoDS_Shape copyShape = BuilderCopy.Shape();
gp_Pnt inputCenter(0,0,0);
TopoDS_Shape scaledShape;
scaledShape = TechDrawGeometry::scaleShape(copyShape,
scale);
TechDrawGeometry::GeometryObject* go = buildGeometryObject(scaledShape,inputCenter,direction);
result = getEdges(go);
delete go;
return result;
}
TechDrawGeometry::GeometryObject* DrawProjectSplit::buildGeometryObject(
TopoDS_Shape shape,
gp_Pnt& inputCenter,
Base::Vector3d direction)
{
TechDrawGeometry::GeometryObject* geometryObject = new TechDrawGeometry::GeometryObject("DrawProjectSplit");
geometryObject->projectShape(shape,
inputCenter,
direction);
geometryObject->extractGeometry(TechDrawGeometry::ecHARD, //always show the hard&outline visible lines
true);
geometryObject->extractGeometry(TechDrawGeometry::ecOUTLINE,
true);
return geometryObject;
}
//! get the projected edges with all their new intersections.
std::vector<TopoDS_Edge> DrawProjectSplit::getEdges(TechDrawGeometry::GeometryObject* geometryObject)
{
const std::vector<TechDrawGeometry::BaseGeom*>& goEdges = geometryObject->getVisibleFaceEdges(true,true);
std::vector<TechDrawGeometry::BaseGeom*>::const_iterator itEdge = goEdges.begin();
std::vector<TopoDS_Edge> origEdges;
for (;itEdge != goEdges.end(); itEdge++) {
origEdges.push_back((*itEdge)->occEdge);
}
std::vector<TopoDS_Edge> faceEdges;
std::vector<TopoDS_Edge> nonZero;
for (auto& e:origEdges) { //drop any zero edges (shouldn't be any by now!!!)
if (!DrawUtil::isZeroEdge(e)) {
nonZero.push_back(e);
} else {
Base::Console().Message("INFO - DPS::extractFaces found ZeroEdge!\n");
}
}
faceEdges = nonZero;
origEdges = nonZero;
//HLR algo does not provide all edge intersections for edge endpoints.
//need to split long edges touched by Vertex of another edge
std::vector<splitPoint> splits;
std::vector<TopoDS_Edge>::iterator itOuter = origEdges.begin();
int iOuter = 0;
for (; itOuter != origEdges.end(); ++itOuter, iOuter++) {
TopoDS_Vertex v1 = TopExp::FirstVertex((*itOuter));
TopoDS_Vertex v2 = TopExp::LastVertex((*itOuter));
Bnd_Box sOuter;
BRepBndLib::Add(*itOuter, sOuter);
sOuter.SetGap(0.1);
if (sOuter.IsVoid()) {
Base::Console().Message("DPS::Extract Faces - outer Bnd_Box is void\n");
continue;
}
if (DrawUtil::isZeroEdge(*itOuter)) {
Base::Console().Message("DPS::extractFaces - outerEdge: %d is ZeroEdge\n",iOuter); //this is not finding ZeroEdges
continue; //skip zero length edges. shouldn't happen ;)
}
int iInner = 0;
std::vector<TopoDS_Edge>::iterator itInner = faceEdges.begin();
for (; itInner != faceEdges.end(); ++itInner,iInner++) {
if (iInner == iOuter) {
continue;
}
if (DrawUtil::isZeroEdge((*itInner))) {
continue; //skip zero length edges. shouldn't happen ;)
}
Bnd_Box sInner;
BRepBndLib::Add(*itInner, sInner);
sInner.SetGap(0.1);
if (sInner.IsVoid()) {
Base::Console().Log("INFO - DPS::Extract Faces - inner Bnd_Box is void\n");
continue;
}
if (sOuter.IsOut(sInner)) { //bboxes of edges don't intersect, don't bother
continue;
}
double param = -1;
if (isOnEdge((*itInner),v1,param,false)) {
gp_Pnt pnt1 = BRep_Tool::Pnt(v1);
splitPoint s1;
s1.i = iInner;
s1.v = Base::Vector3d(pnt1.X(),pnt1.Y(),pnt1.Z());
s1.param = param;
splits.push_back(s1);
}
if (isOnEdge((*itInner),v2,param,false)) {
gp_Pnt pnt2 = BRep_Tool::Pnt(v2);
splitPoint s2;
s2.i = iInner;
s2.v = Base::Vector3d(pnt2.X(),pnt2.Y(),pnt2.Z());
s2.param = param;
splits.push_back(s2);
}
} //inner loop
} //outer loop
std::vector<splitPoint> sorted = sortSplits(splits,true);
auto last = std::unique(sorted.begin(), sorted.end(), DrawProjectSplit::splitEqual); //duplicates to back
sorted.erase(last, sorted.end()); //remove dupls
std::vector<TopoDS_Edge> newEdges = splitEdges(faceEdges,sorted);
if (newEdges.empty()) {
Base::Console().Log("LOG - DPS::extractFaces - no newEdges\n");
}
return newEdges;
}
double DrawProjectSplit::simpleMinDist(TopoDS_Shape s1, TopoDS_Shape s2)
{
Standard_Real minDist = -1;
BRepExtrema_DistShapeShape extss(s1, s2);
if (!extss.IsDone()) {
Base::Console().Message("FE - BRepExtrema_DistShapeShape failed");
return -1;
}
int count = extss.NbSolution();
if (count != 0) {
minDist = extss.Value();
} else {
minDist = -1;
}
return minDist;
}
//this routine is the big time consumer. gets called many times (and is slow?))
//note param gets modified here
bool DrawProjectSplit::isOnEdge(TopoDS_Edge e, TopoDS_Vertex v, double& param, bool allowEnds)
{
bool result = false;
bool outOfBox = false;
param = -2;
//eliminate obvious cases
Bnd_Box sBox;
BRepBndLib::Add(e, sBox);
sBox.SetGap(0.1);
if (sBox.IsVoid()) {
Base::Console().Message("DPS::isOnEdge - Bnd_Box is void\n");
} else {
gp_Pnt pt = BRep_Tool::Pnt(v);
if (sBox.IsOut(pt)) {
outOfBox = true;
}
}
if (!outOfBox) {
double dist = simpleMinDist(v,e);
if (dist < 0.0) {
Base::Console().Error("DPS::isOnEdge - simpleMinDist failed: %.3f\n",dist);
result = false;
} else if (dist < Precision::Confusion()) {
const gp_Pnt pt = BRep_Tool::Pnt(v); //have to duplicate method 3 to get param
BRepAdaptor_Curve adapt(e);
const Handle_Geom_Curve c = adapt.Curve().Curve();
double maxDist = 0.000001; //magic number. less than this gives false positives.
//bool found =
(void) GeomLib_Tool::Parameter(c,pt,maxDist,param); //already know point it on curve
result = true;
}
if (result) {
TopoDS_Vertex v1 = TopExp::FirstVertex(e);
TopoDS_Vertex v2 = TopExp::LastVertex(e);
if (DrawUtil::isSamePoint(v,v1) || DrawUtil::isSamePoint(v,v2)) {
if (!allowEnds) {
result = false;
}
}
}
} //!outofbox
return result;
}
std::vector<TopoDS_Edge> DrawProjectSplit::splitEdges(std::vector<TopoDS_Edge> edges, std::vector<splitPoint> splits)
{
std::vector<TopoDS_Edge> result;
std::vector<TopoDS_Edge> newEdges;
std::vector<splitPoint> edgeSplits; //splits for current edge
int iEdge = 0; //current edge index
int iSplit = 0; //current splitindex
int ii = 0; //i value of current split
int endEdge = edges.size();
int endSplit = splits.size();
int imax = std::numeric_limits<int>::max();
while ((iEdge < endEdge) ) {
if (iSplit < endSplit) {
ii = splits[iSplit].i;
} else {
ii = imax;
}
if (ii == iEdge) {
edgeSplits.push_back(splits[iSplit]);
iSplit++;
} else if (ii > iEdge) {
if (!edgeSplits.empty()) { //save *iedge's splits
newEdges = split1Edge(edges[iEdge],edgeSplits);
result.insert(result.end(), newEdges.begin(), newEdges.end());
edgeSplits.clear();
} else {
result.push_back(edges[iEdge]); //save *iedge
}
iEdge++; //next edge
} else if (iEdge > ii) {
iSplit++;
}
}
if (!edgeSplits.empty()) { //handle last batch
newEdges = split1Edge(edges[iEdge],edgeSplits);
result.insert(result.end(), newEdges.begin(), newEdges.end());
edgeSplits.clear();
}
return result;
}
std::vector<TopoDS_Edge> DrawProjectSplit::split1Edge(TopoDS_Edge e, std::vector<splitPoint> splits)
{
std::vector<TopoDS_Edge> result;
if (splits.empty()) {
return result;
}
BRepAdaptor_Curve adapt(e);
Handle_Geom_Curve c = adapt.Curve().Curve();
double first = BRepLProp_CurveTool::FirstParameter(adapt);
double last = BRepLProp_CurveTool::LastParameter(adapt);
if (first > last) {
//TODO parms.reverse();
Base::Console().Message("DPS::split1Edge - edge is backwards!\n");
return result;
}
std::vector<double> parms;
parms.push_back(first);
for (auto& s:splits) {
parms.push_back(s.param);
}
parms.push_back(last);
std::vector<double>::iterator pfirst = parms.begin();
auto parms2 = parms.begin() + 1;
std::vector<double>::iterator psecond = parms2;
std::vector<double>::iterator pstop = parms.end();
for (; psecond != pstop; ++pfirst,++psecond) {
try {
BRepBuilderAPI_MakeEdge mkEdge(c, *pfirst, *psecond);
if (mkEdge.IsDone()) {
TopoDS_Edge e1 = mkEdge.Edge();
result.push_back(e1);
}
}
catch (Standard_Failure) {
Base::Console().Message("LOG - DPS::split1Edge failed building edge segment\n");
}
}
return result;
}
std::vector<splitPoint> DrawProjectSplit::sortSplits(std::vector<splitPoint>& s, bool ascend)
{
std::vector<splitPoint> sorted = s;
std::sort(sorted.begin(), sorted.end(), DrawProjectSplit::splitCompare);
if (ascend) {
std::reverse(sorted.begin(),sorted.end());
}
return sorted;
}
//return true if p1 "is greater than" p2
/*static*/bool DrawProjectSplit::splitCompare(const splitPoint& p1, const splitPoint& p2)
{
bool result = false;
if (p1.i > p2.i) {
result = true;
} else if (p1.i < p2.i) {
result = false;
} else if (p1.param > p2.param) {
result = true;
} else if (p1.param < p2.param) {
result = false;
}
return result;
}
//return true if p1 "is equal to" p2
/*static*/bool DrawProjectSplit::splitEqual(const splitPoint& p1, const splitPoint& p2)
{
bool result = false;
if ((p1.i == p2.i) &&
(fabs(p1.param - p2.param) < Precision::Confusion())) {
result = true;
}
return result;
}
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