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netgen/libsrc/occ/Partition_Loop.cxx
luz.paz a10531adb2 Misc. typos 
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2018-02-06 14:12:24 -05:00

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#ifdef OCCGEOMETRY
// GEOM PARTITION : partition algorithm
//
// Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License.
//
// 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
//
//
//
// File : Partition_Loop.cxx
// Author : Benedicte MARTIN
// Module : GEOM
// $Header: /cvs/netgen/netgen/libsrc/occ/Partition_Loop.cxx,v 1.6 2008/03/31 14:20:28 wabro Exp $
//using namespace std;
#include <cstdio>
#include <climits>
#include "Partition_Loop.ixx"
#include "utilities.h"
#include <BRep_Builder.hxx>
#include <BRepAlgo_FaceRestrictor.hxx>
#include <BRep_Tool.hxx>
#include <Geom2d_Curve.hxx>
#include <Geom_Surface.hxx>
#include <TopTools_SequenceOfShape.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopTools_MapOfShape.hxx>
#include <TopTools_MapIteratorOfMapOfShape.hxx>
#include <TopTools_MapOfOrientedShape.hxx>
#include <TopTools_DataMapOfShapeShape.hxx>
#include <TopTools_DataMapIteratorOfDataMapOfShapeListOfShape.hxx>
#include <gp_Pnt.hxx>
#include <gp_Pnt2d.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Wire.hxx>
#include <TopoDS_Iterator.hxx>
#include <Precision.hxx>
#include <BRep_TVertex.hxx>
#include <BRep_TEdge.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
static char* name = new char[100];
static int nbe = 0;
#ifdef WIN32
#define M_PI 3.14159265358979323846
#endif
//=======================================================================
//function : Partition_Loop
//purpose :
//=======================================================================
Partition_Loop::Partition_Loop()
{
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void Partition_Loop::Init(const TopoDS_Face& F)
{
myConstEdges.Clear();
myNewWires .Clear();
myNewFaces .Clear();
myFace = F;
}
//=======================================================================
//function : AddConstEdge
//purpose :
//=======================================================================
void Partition_Loop::AddConstEdge (const TopoDS_Edge& E)
{
myConstEdges.Append(E);
}
//=======================================================================
//function : FindDelta
//purpose :
//=======================================================================
static Standard_Real FindDelta(TopTools_ListOfShape& LE,
const TopoDS_Face& F)
{
Standard_Real dist, f, l;
Standard_Real d = Precision::Infinite();
TopTools_ListIteratorOfListOfShape itl;
for ( itl.Initialize(LE); itl.More(); itl.Next()) {
const TopoDS_Edge& E = TopoDS::Edge(itl.Value());
Handle(Geom2d_Curve) C = BRep_Tool::CurveOnSurface(E,F,f,l);
gp_Pnt2d p = C->Value(f);
gp_Pnt2d pp = C->Value(l);
Standard_Real d1 = p.Distance(pp);
if (d1<d) { d=d1;}
}
dist = d ;
return dist;
}
//=======================================================================
//function : SelectEdge
//purpose : Find the edge <NE> connected <CE> by the vertex <CV> in the list <LE>.
// <NE> Is erased of the list. If <CE> is too in the list <LE>
// with the same orientation, it's erased of the list
//=======================================================================
static Standard_Boolean SelectEdge(const TopoDS_Face& F,
const TopoDS_Edge& CE,
const TopoDS_Vertex& CV,
TopoDS_Edge& NE,
TopTools_ListOfShape& LE)
{
TopTools_ListIteratorOfListOfShape itl;
NE.Nullify();
for ( itl.Initialize(LE); itl.More(); itl.Next()) {
if (itl.Value().IsEqual(CE)) {
LE.Remove(itl);
break;
}
}
if (LE.Extent() > 1) {
//--------------------------------------------------------------
// Several possible edges.
// - Test the edge difference of CE
//--------------------------------------------------------------
Standard_Real cf, cl, f, l;
TopoDS_Face FForward = F;
Handle(Geom2d_Curve) Cc, C;
FForward.Orientation(TopAbs_FORWARD);
Cc = BRep_Tool::CurveOnSurface(CE,FForward,cf,cl);
Standard_Real dist,distmin = 100*BRep_Tool::Tolerance(CV);
Standard_Real uc,u;
if (CE.Orientation () == TopAbs_FORWARD) uc = cl;
else uc = cf;
gp_Pnt2d P2,PV = Cc->Value(uc);
Standard_Real delta = FindDelta(LE,FForward);
for ( itl.Initialize(LE); itl.More(); itl.Next()) {
const TopoDS_Edge& E = TopoDS::Edge(itl.Value());
if (!E.IsSame(CE)) {
C = BRep_Tool::CurveOnSurface(E,FForward,f,l);
if (E.Orientation () == TopAbs_FORWARD) u = f;
else u = l;
P2 = C->Value(u);
dist = PV.Distance(P2);
if (dist <= distmin){
distmin = dist;
}
}
}
Standard_Real anglemax = - M_PI;
TopoDS_Edge SelectedEdge;
for ( itl.Initialize(LE); itl.More(); itl.Next()) {
const TopoDS_Edge& E = TopoDS::Edge(itl.Value());
if (!E.IsSame(CE)) {
C = BRep_Tool::CurveOnSurface(E,FForward,f,l);
if (E.Orientation () == TopAbs_FORWARD) u = f;
else u = l;
P2 = C->Value(u);
dist = PV.Distance(P2);
if (dist <= distmin + (1./3)*delta){
gp_Pnt2d PC, P;
gp_Vec2d CTg1, CTg2, Tg1, Tg2;
Cc->D2(uc, PC, CTg1, CTg2);
C->D2(u, P, Tg1, Tg2);
Standard_Real angle;
if (CE.Orientation () == TopAbs_REVERSED && E.Orientation () == TopAbs_FORWARD) {
angle = CTg1.Angle(Tg1.Reversed());
}
else if (CE.Orientation () == TopAbs_FORWARD && E.Orientation () == TopAbs_REVERSED) {
angle = (CTg1.Reversed()).Angle(Tg1);
}
else if (CE.Orientation () == TopAbs_REVERSED && E.Orientation () == TopAbs_REVERSED) {
angle = CTg1.Angle(Tg1);
}
else if (CE.Orientation () == TopAbs_FORWARD && E.Orientation () == TopAbs_FORWARD) {
angle = (CTg1.Reversed()).Angle(Tg1.Reversed());
}
if (angle >= anglemax) {
anglemax = angle ;
SelectedEdge = E;
}
}
}
}
for ( itl.Initialize(LE); itl.More(); itl.Next()) {
const TopoDS_Edge& E = TopoDS::Edge(itl.Value());
if (E.IsEqual(SelectedEdge)) {
NE = TopoDS::Edge(E);
LE.Remove(itl);
break;
}
}
}
else if (LE.Extent() == 1) {
NE = TopoDS::Edge(LE.First());
LE.RemoveFirst();
}
else {
return Standard_False;
}
return Standard_True;
}
//=======================================================================
//function : SamePnt2d
//purpose :
//=======================================================================
static Standard_Boolean SamePnt2d(TopoDS_Vertex V,
TopoDS_Edge& E1,
TopoDS_Edge& E2,
TopoDS_Face& F)
{
Standard_Real f1,f2,l1,l2;
gp_Pnt2d P1,P2;
TopoDS_Shape aLocalF = F.Oriented(TopAbs_FORWARD);
TopoDS_Face FF = TopoDS::Face(aLocalF);
Handle(Geom2d_Curve) C1 = BRep_Tool::CurveOnSurface(E1,FF,f1,l1);
Handle(Geom2d_Curve) C2 = BRep_Tool::CurveOnSurface(E2,FF,f2,l2);
if (E1.Orientation () == TopAbs_FORWARD) P1 = C1->Value(f1);
else P1 = C1->Value(l1);
if (E2.Orientation () == TopAbs_FORWARD) P2 = C2->Value(l2);
else P2 = C2->Value(f2);
Standard_Real Tol = 100*BRep_Tool::Tolerance(V);
Standard_Real Dist = P1.Distance(P2);
return Dist < Tol;
}
//=======================================================================
//function : PurgeNewEdges
//purpose :
//=======================================================================
static void PurgeNewEdges(TopTools_ListOfShape& ConstEdges,
const TopTools_MapOfOrientedShape& UsedEdges)
{
TopTools_ListIteratorOfListOfShape it(ConstEdges);
while ( it.More()) {
const TopoDS_Shape& NE = it.Value();
if (!UsedEdges.Contains(NE)) {
ConstEdges.Remove(it);
}
else {
it.Next();
}
}
}
//=======================================================================
//function : StoreInMVE
//purpose :
//=======================================================================
static void StoreInMVE (const TopoDS_Face& F,
TopoDS_Edge& E,
TopTools_DataMapOfShapeListOfShape& MVE )
{
TopoDS_Vertex V1, V2;
TopTools_ListOfShape Empty;
TopExp::Vertices(E,V1,V2);
if (!MVE.IsBound(V1)) {
MVE.Bind(V1,Empty);
}
MVE(V1).Append(E);
if (!MVE.IsBound(V2)) {
MVE.Bind(V2,Empty);
}
MVE(V2).Append(E);
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void Partition_Loop::Perform()
{
TopTools_DataMapOfShapeListOfShape MVE;
TopTools_DataMapIteratorOfDataMapOfShapeListOfShape Mapit, Mapit1;
TopTools_ListIteratorOfListOfShape itl;
TopoDS_Vertex V1,V2;
//-----------------------------------
// Construction map vertex => edges
//-----------------------------------
for (itl.Initialize(myConstEdges); itl.More(); itl.Next()) {
TopoDS_Edge& E = TopoDS::Edge(itl.Value());
StoreInMVE(myFace,E,MVE);
}
//----------------------------------------------
// Construction of all the wires and of all the new faces.
//----------------------------------------------
TopTools_MapOfOrientedShape UsedEdges;
while (!MVE.IsEmpty()) {
TopoDS_Vertex VF,CV;
TopoDS_Edge CE,NE,EF;
TopoDS_Wire NW;
BRep_Builder B;
Standard_Boolean End= Standard_False;
B.MakeWire(NW);
//--------------------------------
// EF first edge.
//--------------------------------
Mapit.Initialize(MVE);
EF = CE = TopoDS::Edge(Mapit.Value().First());
TopExp::Vertices(CE,V1,V2);
//--------------------------------
// VF first vertex
//--------------------------------
if (CE.Orientation() == TopAbs_FORWARD) {
CV = VF = V1;
}
else {
CV = VF = V2;
}
if (!MVE.IsBound(CV)) continue;
for ( itl.Initialize(MVE(CV)); itl.More(); itl.Next()) {
if (itl.Value().IsEqual(CE)) {
MVE(CV).Remove(itl);
break;
}
}
int i = 0;
while (!End) {
//-------------------------------
// Construction of a wire.
//-------------------------------
TopExp::Vertices(CE,V1,V2);
if (!CV.IsSame(V1)) CV = V1; else CV = V2;
B.Add (NW,CE);
UsedEdges.Add(CE);
//--------------
// stop test
//--------------
if (!MVE.IsBound(CV) || MVE(CV).IsEmpty() || CV.IsSame(VF) ) {
if (CV.IsSame(VF)) {
if (MVE(CV).Extent() == 1 ) MVE.UnBind(CV);
else {
for ( itl.Initialize(MVE(CV)); itl.More(); itl.Next()) {
if (itl.Value().IsEqual(CE)) {
MVE(CV).Remove(itl);
break;
}
}
}
}
End=Standard_True;
}
//--------------
// select edge
//--------------
else {
Standard_Boolean find = SelectEdge(myFace,CE,CV,NE,MVE(CV));
if (find) {
CE=NE;
if (MVE(CV).IsEmpty()) MVE.UnBind(CV);
if (CE.IsNull() ) {
MESSAGE ( " CE is NULL !!! " )
End=Standard_True;
}
}
else {
MESSAGE ( " edge doesn't exist " )
End=Standard_True;
}
}
}
//-----------------------------
// Test if the wire is closed
//-----------------------------
if (VF.IsSame(CV) && SamePnt2d(VF,EF,CE,myFace)) {
}
else{
MESSAGE ( "wire not closed" )
}
myNewWires.Append (NW);
}
PurgeNewEdges(myConstEdges,UsedEdges);
}
//=======================================================================
//function : NewWires
//purpose :
//=======================================================================
const TopTools_ListOfShape& Partition_Loop::NewWires() const
{
return myNewWires;
}
//=======================================================================
//function : NewFaces
//purpose :
//=======================================================================
const TopTools_ListOfShape& Partition_Loop::NewFaces() const
{
return myNewFaces;
}
//=======================================================================
//function : WiresToFaces
//purpose :
//=======================================================================
void Partition_Loop::WiresToFaces()
{
if (!myNewWires.IsEmpty()) {
BRepAlgo_FaceRestrictor FR;
TopAbs_Orientation OriF = myFace.Orientation();
TopoDS_Shape aLocalS = myFace.Oriented(TopAbs_FORWARD);
FR.Init (TopoDS::Face(aLocalS),Standard_False);
TopTools_ListIteratorOfListOfShape it(myNewWires);
for (; it.More(); it.Next()) {
FR.Add(TopoDS::Wire(it.Value()));
}
FR.Perform();
if (FR.IsDone()) {
for (; FR.More(); FR.Next()) {
myNewFaces.Append(FR.Current().Oriented(OriF));
}
}
}
}
#endif
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