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occt/src/BOPTools/BOPTools_AlgoTools3D.cxx
ifv 873c119ff1 0024255: Regressions in test cases on OCCT vc9 win64 Release
Updated test-cases from branch CR24255_3

0024255: Regressions in test cases on OCCT vc9 win64 Release

Small refactoring.

Fix for CASE bugs modalg_5 bug25298_09: FAILED (error)

Test-cases correction (bugs modalg_5 bugs25804_1, bug25704_2)
2015-02-12 14:40:14 +03:00

833 lines
22 KiB
C++

// Created by: Peter KURNEV
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.
#include <BOPTools_AlgoTools3D.ixx>
#include <Bnd_Box.hxx>
#include <Poly_Triangulation.hxx>
#include <gp_Vec2d.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Lin2d.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Vec.hxx>
#include <gp_Dir.hxx>
#include <gp_Pln.hxx>
#include <gp_Cylinder.hxx>
#include <Geom2d_Curve.hxx>
#include <Geom2d_TrimmedCurve.hxx>
#include <Geom2d_Line.hxx>
#include <Geom_Curve.hxx>
#include <Geom_Surface.hxx>
#include <Geom_BSplineSurface.hxx>
#include <Geom_BezierSurface.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <GeomAdaptor_Surface.hxx>
#include <Geom2dAdaptor_Curve.hxx>
#include <Geom2dHatch_Hatcher.hxx>
#include <HatchGen_Domain.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Shape.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Vertex.hxx>
#include <BRep_Builder.hxx>
#include <BRep_Tool.hxx>
#include <BRep_TVertex.hxx>
#include <BRep_ListIteratorOfListOfPointRepresentation.hxx>
#include <BRep_PointRepresentation.hxx>
#include <BRep_TEdge.hxx>
#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
#include <BRep_CurveRepresentation.hxx>
#include <BRep_TFace.hxx>
#include <BRepTools.hxx>
#include <BRepBndLib.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <GProp_GProps.hxx>
#include <BRepGProp.hxx>
#include <BOPCol_IndexedMapOfShape.hxx>
#include <BOPCol_IndexedDataMapOfShapeListOfShape.hxx>
#include <IntTools_Tools.hxx>
#include <IntTools_Context.hxx>
#include <BOPTools_AlgoTools2D.hxx>
static void Add(const TopoDS_Shape& aS,
BOPCol_IndexedMapOfShape& myShapes,
Standard_Boolean& bHasGeometry);
static
Standard_Boolean HasGeometry(const TopoDS_Shape& aS);
//=======================================================================
//function : DoSplitSEAMOnFace
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::DoSplitSEAMOnFace (const TopoDS_Edge& aSplit,
const TopoDS_Face& aF)
{
Standard_Boolean bIsUPeriodic, bIsVPeriodic, bIsLeft;
Standard_Real aTol, a, b, anUPeriod, anVPeriod, aT, anU, dU, anU1;
Standard_Real aScPr, anV, dV, anV1;
Standard_Real aUmin, aUmax, aVmin, aVmax;
gp_Pnt2d aP2D;
gp_Vec2d aVec2D;
Handle(Geom2d_Curve) aTmpC1, aTmpC2;
Handle(Geom2d_Curve) C2D1;
Handle(Geom2d_Line) aLD1;
Handle(Geom_Surface) aS;
BRep_Builder BB;
TopoDS_Edge aSp;
//
bIsLeft = Standard_False;
aSp=aSplit;
aSp.Orientation(TopAbs_FORWARD);
aTol=BRep_Tool::Tolerance(aSp);
//
aS=BRep_Tool::Surface(aF);
//
aS->Bounds(aUmin, aUmax, aVmin, aVmax);
//
bIsUPeriodic=aS->IsUPeriodic();
bIsVPeriodic=aS->IsVPeriodic();
//
anUPeriod = bIsUPeriodic ? aS->UPeriod() : 0.;
anVPeriod = bIsVPeriodic ? aS->VPeriod() : 0.;
//
if (!bIsUPeriodic && !bIsVPeriodic) {
Standard_Boolean bIsUClosed, bIsVClosed;
Handle(Geom_BSplineSurface) aBS;
Handle(Geom_BezierSurface) aBZ;
Handle(Geom_RectangularTrimmedSurface) aRTS;
//
bIsUClosed=Standard_False;
bIsVClosed=Standard_False;
aBS=Handle(Geom_BSplineSurface)::DownCast(aS);
aBZ=Handle(Geom_BezierSurface) ::DownCast(aS);
aRTS=Handle(Geom_RectangularTrimmedSurface)::DownCast(aS);
//
if (!aBS.IsNull()) {
bIsUClosed=aBS->IsUClosed();
bIsVClosed=aBS->IsVClosed();
}
else if (!aBZ.IsNull()) {
bIsUClosed=aBZ->IsUClosed();
bIsVClosed=aBZ->IsVClosed();
}
else if (!aRTS.IsNull()) {
Handle(Geom_Surface) aSB;
//
aSB=aRTS->BasisSurface();
bIsUPeriodic=aSB->IsUPeriodic();
bIsVPeriodic=aSB->IsVPeriodic();
//
if (!(bIsUPeriodic || bIsVPeriodic)) {
return;
}
anUPeriod = bIsUPeriodic ? aSB->UPeriod() : 0.;
anVPeriod = bIsVPeriodic ? aSB->VPeriod() : 0.;
}
//
if (aRTS.IsNull()) {
if (!bIsUClosed && !bIsVClosed) {
return;
}
//
if (bIsUClosed) {
anUPeriod=aUmax-aUmin;
}
if (bIsVClosed) {
anVPeriod=aVmax-aVmin;
}
}
}
//
//---------------------------------------------------
C2D1=BRep_Tool::CurveOnSurface(aSp, aF, a, b);
//
aT=BOPTools_AlgoTools2D::IntermediatePoint(a, b);
C2D1->D1(aT, aP2D, aVec2D);
gp_Dir2d aDir2D1(aVec2D), aDOX(-1.,0.), aDOY(0.,1.);
//
anU=aP2D.X();
anV=aP2D.Y();
//
anU1=anU;
anV1=anV;
//
GeomAdaptor_Surface aGAS(aS);
dU = aGAS.UResolution(aTol);
dV = aGAS.VResolution(aTol);
//
if (anUPeriod > 0.){
if (fabs (anU-aUmin) < dU) {
bIsLeft=Standard_True;
anU1=anU+anUPeriod;
}
else if (fabs (anU-aUmax) < dU) {
bIsLeft=Standard_False;
anU1=anU-anUPeriod;
}
}
//
if (anVPeriod > 0.) {
if (fabs (anV-aVmin) < dV) {
bIsLeft=Standard_True;
anV1=anV+anVPeriod;
}
else if (fabs (anV-aVmax) < dV) {
bIsLeft=Standard_False;
anV1=anV-anVPeriod;
}
}
//
if (anU1==anU && anV1==anV) {
return;
}
//
aScPr = (anU1==anU) ? aDir2D1*aDOX : aDir2D1*aDOY;
//
aTmpC1=Handle(Geom2d_Curve)::DownCast(C2D1->Copy());
Handle(Geom2d_TrimmedCurve) aC1 =
new Geom2d_TrimmedCurve(aTmpC1, a, b);
//
aTmpC2=Handle(Geom2d_Curve)::DownCast(C2D1->Copy());
Handle(Geom2d_TrimmedCurve) aC2 =
new Geom2d_TrimmedCurve(aTmpC2, a, b);
gp_Vec2d aTrV(anU1-anU, anV1-anV);
aC2->Translate(aTrV);
//
if (!bIsLeft) {
if (aScPr<0.) {
BB.UpdateEdge(aSp, aC2, aC1, aF, aTol);
}
else {
BB.UpdateEdge(aSp, aC1, aC2, aF, aTol);
}
}
else {
if (aScPr<0.) {
BB.UpdateEdge(aSp, aC1, aC2, aF, aTol);
}
else {
BB.UpdateEdge(aSp, aC2, aC1, aF, aTol);
}
}
}
//=======================================================================
//function : GetNormalToFaceOnEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::GetNormalToFaceOnEdge (const TopoDS_Edge& aE,
const TopoDS_Face& aF,
gp_Dir& aDNF)
{
Standard_Real aT, aT1, aT2;
BRep_Tool::CurveOnSurface(aE, aF, aT1, aT2);
aT=BOPTools_AlgoTools2D::IntermediatePoint(aT1, aT2);
BOPTools_AlgoTools3D::GetNormalToFaceOnEdge (aE, aF, aT, aDNF);
if (aF.Orientation()==TopAbs_REVERSED){
aDNF.Reverse();
}
}
//=======================================================================
//function : GetNormalToFaceOnEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::GetNormalToFaceOnEdge (const TopoDS_Edge& aE,
const TopoDS_Face& aF1,
const Standard_Real aT,
gp_Dir& aDNF1)
{
Standard_Real U, V, aTolPC;
gp_Pnt2d aP2D;
gp_Pnt aP;
gp_Vec aD1U, aD1V;
Handle(Geom_Surface) aS1=BRep_Tool::Surface(aF1);
Handle(Geom2d_Curve)aC2D1;
BOPTools_AlgoTools2D::CurveOnSurface(aE, aF1, aC2D1, aTolPC);
aC2D1->D0(aT, aP2D);
U=aP2D.X();
V=aP2D.Y();
aS1->D1(U, V, aP, aD1U, aD1V);
gp_Dir aDD1U(aD1U);
gp_Dir aDD1V(aD1V);
aDNF1=aDD1U^aDD1V;
}
//=======================================================================
//function : SenseFlag
//purpose :
//=======================================================================
Standard_Integer BOPTools_AlgoTools3D::SenseFlag (const gp_Dir& aDNF1,
const gp_Dir& aDNF2)
{
Standard_Boolean bIsDirsCoinside;
//
bIsDirsCoinside=IntTools_Tools::IsDirsCoinside(aDNF1, aDNF2);
if (!bIsDirsCoinside) {
return 0;
}
Standard_Real aScPr;
aScPr=aDNF1*aDNF2;
if (aScPr<0.) {
return -1;
}
else if (aScPr>0.) {
return 1;
}
return -1;
}
//=======================================================================
//function : GetNormalToSurface
//purpose :
//=======================================================================
Standard_Boolean BOPTools_AlgoTools3D::GetNormalToSurface
(const Handle(Geom_Surface)& aS,
const Standard_Real U,
const Standard_Real V,
gp_Dir& aDNS)
{
Standard_Boolean bFlag;
gp_Pnt aP;
gp_Vec aD1U, aD1V;
aS->D1(U, V, aP, aD1U, aD1V);
gp_Dir aDD1U(aD1U);
gp_Dir aDD1V(aD1V);
bFlag=IntTools_Tools::IsDirsCoinside(aDD1U, aDD1U);
if (!bFlag) {
return bFlag;
}
aDNS=aDD1U^aDD1V;
return bFlag;
}
//=======================================================================
//function : GetApproxNormalToFaceOnEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::GetApproxNormalToFaceOnEdge
(const TopoDS_Edge& aE,
const TopoDS_Face& aF,
const Standard_Real aT,
gp_Pnt& aPNear,
gp_Dir& aDNF,
Standard_Real aDt2D)
{
Standard_Real aFirst, aLast;
Handle(Geom2d_Curve) aC2D=
BRep_Tool::CurveOnSurface (aE, aF, aFirst, aLast);
if (aC2D.IsNull()) {
return;
}
gp_Pnt2d aPx2DNear;
PointNearEdge (aE, aF, aT, aDt2D, aPx2DNear, aPNear);
Handle(Geom_Surface) aS=BRep_Tool::Surface(aF);
BOPTools_AlgoTools3D::GetNormalToSurface
(aS, aPx2DNear.X(), aPx2DNear.Y(), aDNF);
if (aF.Orientation()==TopAbs_REVERSED){
aDNF.Reverse();
}
}
//=======================================================================
//function : GetApproxNormalToFaceOnEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::GetApproxNormalToFaceOnEdge
(const TopoDS_Edge& aE,
const TopoDS_Face& aF,
const Standard_Real aT,
gp_Pnt& aPNear,
gp_Dir& aDNF,
Handle(IntTools_Context)& theContext)
{
Standard_Real aFirst, aLast;
Handle(Geom2d_Curve) aC2D=
BRep_Tool::CurveOnSurface (aE, aF, aFirst, aLast);
if (aC2D.IsNull()) {
return;
}
//gp_Pnt aPNear;
gp_Pnt2d aPx2DNear;
BOPTools_AlgoTools3D::PointNearEdge
(aE, aF, aT, aPx2DNear, aPNear, theContext);
Handle(Geom_Surface) aS=BRep_Tool::Surface(aF);
BOPTools_AlgoTools3D::GetNormalToSurface
(aS, aPx2DNear.X(), aPx2DNear.Y(), aDNF);
if (aF.Orientation()==TopAbs_REVERSED){
aDNF.Reverse();
}
}
//=======================================================================
//function : PointNearEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::PointNearEdge (const TopoDS_Edge& aE,
const TopoDS_Face& aF,
const Standard_Real aT,
const Standard_Real aDt2D,
gp_Pnt2d& aPx2DNear,
gp_Pnt& aPxNear)
{
Standard_Real aFirst, aLast, aETol, aFTol, transVal;
GeomAbs_SurfaceType aTS;
Handle(Geom2d_Curve) aC2D;
Handle(Geom_Surface) aS;
//
aC2D= BRep_Tool::CurveOnSurface (aE, aF, aFirst, aLast);
if (aC2D.IsNull()) {
aPx2DNear.SetCoord (99., 99);
return;
}
//
aS=BRep_Tool::Surface(aF);
//
gp_Pnt2d aPx2D;
gp_Vec2d aVx2D;
aC2D->D1 (aT, aPx2D, aVx2D);
gp_Dir2d aDx2D(aVx2D);
gp_Dir2d aDP;
aDP.SetCoord (-aDx2D.Y(), aDx2D.X());
if (aE.Orientation()==TopAbs_REVERSED){
aDP.Reverse();
}
if (aF.Orientation()==TopAbs_REVERSED) {
aDP.Reverse();
}
//
aETol = BRep_Tool::Tolerance(aE);
aFTol = BRep_Tool::Tolerance(aF);
// NPAL19220
GeomAdaptor_Surface aGAS(aS);
aTS=aGAS.GetType();
if (aTS==GeomAbs_BSplineSurface) {
if (aETol > 1.e-5) {
aFTol=aETol;
}
}
if( aETol > 1.e-5 || aFTol > 1.e-5 ) {
//
if(aTS!=GeomAbs_Sphere) {
gp_Vec2d transVec( aDP );
transVal = aDt2D + aETol + aFTol;
if (aTS==GeomAbs_Cylinder) {// pkv/909/F8
Standard_Real aR, dT;
//
gp_Cylinder aCyl=aGAS.Cylinder();
aR=aCyl.Radius();
dT=1.-transVal/aR;
if (dT>=-1 && dT<=1) {
dT=acos(dT);
transVal=dT;
}
}
//
transVec.Multiply(transVal);
aPx2DNear = aPx2D.Translated( transVec );
}
else {
aPx2DNear.SetCoord
(aPx2D.X()+aDt2D*aDP.X(), aPx2D.Y()+aDt2D*aDP.Y());
}
}
else {
aPx2DNear.SetCoord
(aPx2D.X()+aDt2D*aDP.X(), aPx2D.Y()+aDt2D*aDP.Y());
}
//
aS->D0(aPx2DNear.X(), aPx2DNear.Y(), aPxNear);
}
//=======================================================================
//function : PointNearEdge
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::PointNearEdge
(const TopoDS_Edge& aE,
const TopoDS_Face& aF,
const Standard_Real aT,
gp_Pnt2d& aPx2DNear,
gp_Pnt& aPxNear,
Handle(IntTools_Context)& theContext)
{
Standard_Real aTolE, aTolF, dTx, dT2D;
Handle(Geom_Surface) aS;
GeomAdaptor_Surface aGAS;
//
dT2D=10.*BOPTools_AlgoTools3D::MinStepIn2d();//~1.e-5;
//
aS = BRep_Tool::Surface(aF);
aGAS.Load(aS);
if (aGAS.GetType()==GeomAbs_Cylinder ||
aGAS.GetType()==GeomAbs_Sphere) {
dT2D=10.*dT2D;
}
//
aTolE = BRep_Tool::Tolerance(aE);
aTolF = BRep_Tool::Tolerance(aF);
dTx = 2.*(aTolE + aTolF);
if (dTx > dT2D) {
dT2D=dTx;
}
//
BOPTools_AlgoTools3D::PointNearEdge
(aE, aF, aT, dT2D, aPx2DNear, aPxNear);
if (!theContext->IsPointInOnFace(aF, aPx2DNear)) {
Standard_Integer iErr;
Standard_Real aU1, aU2, aV1, aV2, dV, dU, dTresh;
gp_Pnt aP;
gp_Pnt2d aP2d;
//
BRepTools::UVBounds(aF, aU1, aU2, aV1, aV2);
//
dU=aU2-aU1;
dV=aV2-aV1;
//
dTresh=1.e-4;
if (dT2D > dTresh) {
dTresh=dT2D;
}
//
if (dU < dTresh || dV < dTresh) {
iErr = BOPTools_AlgoTools3D::PointInFace
(aF, aP, aP2d, theContext);
if (!iErr) {
aPxNear = aP;
aPx2DNear = aP2d;
}
}
}
}
//=======================================================================
// function: PointNearEdge
// purpose:
//=======================================================================
void BOPTools_AlgoTools3D::PointNearEdge
(const TopoDS_Edge& aE,
const TopoDS_Face& aF,
gp_Pnt2d& aPInFace2D,
gp_Pnt& aPInFace,
Handle(IntTools_Context)& theContext)
{
Standard_Real aT, aT1, aT2;
//
// 1.
BRep_Tool::Range(aE, aT1, aT2);
aT=BOPTools_AlgoTools2D::IntermediatePoint(aT1, aT2);
//
// 2. a Point inside Face near aPOnEdge aPInFace;
TopoDS_Face aFF=aF;
TopoDS_Edge aERight;
aFF.Orientation(TopAbs_FORWARD);
BOPTools_AlgoTools3D::OrientEdgeOnFace (aE, aFF, aERight);
BOPTools_AlgoTools3D::PointNearEdge
(aERight, aFF, aT, aPInFace2D, aPInFace, theContext);
}
//=======================================================================
//function : MinStepIn2d
//purpose :
//=======================================================================
Standard_Real BOPTools_AlgoTools3D::MinStepIn2d()
{
Standard_Real dt=1.e-5;
return dt;
}
//=======================================================================
//function : IsEmptyShape
//purpose :
//=======================================================================
Standard_Boolean BOPTools_AlgoTools3D::IsEmptyShape
(const TopoDS_Shape& aS)
{
Standard_Boolean bHasGeometry=Standard_False;
//
BOPCol_IndexedMapOfShape myShapes;
//
Add(aS, myShapes, bHasGeometry);
return !bHasGeometry;
}
//=======================================================================
//function : Add
//purpose :
//=======================================================================
void Add(const TopoDS_Shape& aS,
BOPCol_IndexedMapOfShape& myShapes,
Standard_Boolean& bHasGeometry)
{
Standard_Integer anIndex;
//
if (bHasGeometry) {
return;
}
//
if (aS.IsNull()) {
return;
}
//
TopoDS_Shape aSx = aS;
//
anIndex=myShapes.FindIndex(aSx);
if (!anIndex) {
bHasGeometry=HasGeometry (aSx);
if (bHasGeometry) {
return;
}
//
TopoDS_Iterator anIt(aSx, Standard_False, Standard_False);
for(; anIt.More(); anIt.Next()) {
const TopoDS_Shape& aSy=anIt.Value();
Add(aSy, myShapes, bHasGeometry);
//
if (bHasGeometry) {
return;
}
//
myShapes.Add(aSx);
}
}
}
//=======================================================================
//function : HasGeometry
//purpose :
//=======================================================================
Standard_Boolean HasGeometry(const TopoDS_Shape& aS)
{
Standard_Boolean bHasGeometry=Standard_True;
TopAbs_ShapeEnum aType= aS.ShapeType();
if (aType == TopAbs_VERTEX) {
return bHasGeometry;
}
//
else if (aType == TopAbs_EDGE) {
Handle(BRep_TEdge) TE = Handle(BRep_TEdge)::DownCast(aS.TShape());
BRep_ListIteratorOfListOfCurveRepresentation itrc(TE->Curves());
while (itrc.More()) {
const Handle(BRep_CurveRepresentation)& CR = itrc.Value();
if (CR->IsCurve3D()) {
if (!CR->Curve3D().IsNull()) {
return bHasGeometry;
}
}
else if (CR->IsCurveOnSurface()) {
return bHasGeometry;
}
else if (CR->IsRegularity()) {
return bHasGeometry;
}
else if (!CR->Polygon3D().IsNull()) {
return bHasGeometry;
}
else if (CR->IsPolygonOnTriangulation()) {
return bHasGeometry;
}
else if (CR->IsPolygonOnSurface()) {
return bHasGeometry;
}
itrc.Next();
}
}
//
else if (aType == TopAbs_FACE) {
Handle(BRep_TFace) TF = Handle(BRep_TFace)::DownCast(aS.TShape());
if (!TF->Surface().IsNull()) {
return bHasGeometry;
}
Handle(Poly_Triangulation) Tr = TF->Triangulation();
if (!Tr.IsNull()) {
return bHasGeometry;
}
}
return !bHasGeometry;
}
//=======================================================================
//function : OrientEdgeOnFace
//purpose :
//=======================================================================
void BOPTools_AlgoTools3D::OrientEdgeOnFace (const TopoDS_Edge& aE,
const TopoDS_Face& aF,
TopoDS_Edge& aERight)
{
if (BRep_Tool::IsClosed(aE, aF)) {
aERight=aE;
aERight.Orientation(aE.Orientation());
Standard_Integer iFoundCount = 0;
TopoDS_Edge anEdge = aE;
TopExp_Explorer anExp(aF, TopAbs_EDGE);
for (; anExp.More(); anExp.Next()) {
const TopoDS_Shape& aSS=anExp.Current();
if (aSS.IsSame(aE)) {
anEdge = TopoDS::Edge(aSS);
iFoundCount++;
}
}
if(iFoundCount == 1) {
aERight = anEdge;
}
return;
}
TopExp_Explorer anExp(aF, TopAbs_EDGE);
for (; anExp.More(); anExp.Next()) {
const TopoDS_Shape& aSS=anExp.Current();
if (aSS.IsSame(aE)) {
aERight=aE;
aERight.Orientation(aSS.Orientation());
return;
}
}
aERight=aE;
aERight.Orientation(aE.Orientation());
}
//=======================================================================
//function : PointInFace
//purpose :
//=======================================================================
Standard_Integer BOPTools_AlgoTools3D::PointInFace
(const TopoDS_Face& aF,
gp_Pnt& theP,
gp_Pnt2d& theP2D,
Handle(IntTools_Context)& theContext)
{
Standard_Boolean bIsDone, bHasFirstPoint, bHasSecondPoint;
Standard_Integer iErr, aIx = 0, aNbDomains = 0;
Standard_Real aUMin, aUMax, aVMin, aVMax;
Standard_Real aVx = 0., aUx, aV1, aV2;
gp_Dir2d aD2D (0., 1.);
gp_Pnt2d aP2D;
gp_Pnt aPx;
Handle(Geom2d_Curve) aC2D;
Handle(Geom2d_Line) aL2D;
Handle(Geom_Surface) aS;
TopoDS_Face aFF;
//
Geom2dHatch_Hatcher& aHatcher = theContext->Hatcher(aF);
//
iErr=0;
//
aFF=aF;
aFF.Orientation (TopAbs_FORWARD);
//
aS=BRep_Tool::Surface(aFF);
BRepTools::UVBounds(aFF, aUMin, aUMax, aVMin, aVMax);
//
aUx=IntTools_Tools::IntermediatePoint(aUMin, aUMax);
Standard_Integer i;
for(i = 1; i <= 2; ++i)
{
aP2D.SetCoord(aUx, 0.);
aL2D=new Geom2d_Line (aP2D, aD2D);
Geom2dAdaptor_Curve aHCur(aL2D);
//
aIx=aHatcher.AddHatching(aHCur) ;
//
aHatcher.Trim(aIx);
bIsDone=aHatcher.TrimDone(aIx);
if (!bIsDone) {
iErr=1;
return iErr;
}
//
if(aHatcher.NbPoints(aIx) > 1)
{
aHatcher.ComputeDomains(aIx);
bIsDone=aHatcher.IsDone(aIx);
if (!bIsDone) {
iErr=2;
return iErr;
}
break;
}
else
{
aUx = aUMax - (aUx - aUMin);
}
}
//
aNbDomains=aHatcher.NbDomains(aIx);
if (aNbDomains > 0) {
const HatchGen_Domain& aDomain=aHatcher.Domain (aIx, 1);
bHasFirstPoint=aDomain.HasFirstPoint();
if (!bHasFirstPoint) {
iErr=3;
return iErr;
}
//
aV1=aDomain.FirstPoint().Parameter();
//
bHasSecondPoint=aDomain.HasSecondPoint();
if (!bHasSecondPoint) {
iErr=4;
return iErr;
}
//
aV2=aDomain.SecondPoint().Parameter();
//
aVx=IntTools_Tools::IntermediatePoint(aV1, aV2);
//
}
else {
iErr=2;
return iErr;
}
//
aS->D0(aUx, aVx, aPx);
//
theP2D.SetCoord(aUx, aVx);
theP=aPx;
//
return iErr;
}