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// File: BRepOffsetAPI_MakeOffset.cxx
// Created: Mon Sep 18 14:16:15 1995
// Author: Bruno DUMORTIER
// <dub@fuegox>
#include <BRepOffsetAPI_MakeOffset.ixx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <BRep_Builder.hxx>
#include <BRep_Tool.hxx>
#include <BRepAlgo_FaceRestrictor.hxx>
#include <Extrema_ExtPS.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepFill_OffsetWire.hxx>
#include <BRepFill_ListIteratorOfListOfOffsetWire.hxx>
#include <BRepTopAdaptor_FClass2d.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Pnt.hxx>
#include <Precision.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopExp_Explorer.hxx>
#include <TopExp.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Compound.hxx>
#include <TopoDS_Wire.hxx>
#include <StdFail_NotDone.hxx>
//=======================================================================
//function : BRepOffsetAPI_MakeOffset
//purpose :
//=======================================================================
BRepOffsetAPI_MakeOffset::BRepOffsetAPI_MakeOffset()
:myIsInitialized( Standard_False)
{
}
//=======================================================================
//function : BRepOffsetAPI_MakeOffset
//purpose :
//=======================================================================
BRepOffsetAPI_MakeOffset::BRepOffsetAPI_MakeOffset(const TopoDS_Face& Spine,
const GeomAbs_JoinType Join)
{
Init(Spine, Join);
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void BRepOffsetAPI_MakeOffset::Init(const TopoDS_Face& Spine,
const GeomAbs_JoinType Join)
{
myFace = Spine;
myIsInitialized = Standard_True;
myJoin = Join;
TopExp_Explorer exp;
for (exp.Init(myFace,TopAbs_WIRE); exp.More();exp.Next()) {
myWires.Append(exp.Current());
}
}
//=======================================================================
//function : BRepOffsetAPI_MakeOffset
//purpose :
//=======================================================================
BRepOffsetAPI_MakeOffset::BRepOffsetAPI_MakeOffset(const TopoDS_Wire& Spine,
const GeomAbs_JoinType Join)
{
myWires.Append(Spine);
myIsInitialized = Standard_True;
myJoin = Join;
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void BRepOffsetAPI_MakeOffset::Init(const GeomAbs_JoinType Join)
{
myJoin = Join;
}
//=======================================================================
//function : BRepOffsetAPI_MakeOffset
//purpose :
//=======================================================================
void BRepOffsetAPI_MakeOffset::AddWire(const TopoDS_Wire& Spine)
{
myIsInitialized = Standard_True;
myWires.Append(Spine);
}
//=======================================================================
//function : BuildDomain
//purpose :
//=======================================================================
static void BuildDomains(TopoDS_Face& myFace,
TopTools_ListOfShape& WorkWires,
BRepFill_ListOfOffsetWire& myAlgos,
GeomAbs_JoinType myJoin,
Standard_Boolean isPositive)
{
BRepAlgo_FaceRestrictor FR;
TopoDS_Vertex VF,VL;
TopTools_ListOfShape LOW;
BRep_Builder B;
if (myFace.IsNull()) {
myFace = BRepBuilderAPI_MakeFace(TopoDS::Wire(WorkWires.First()),Standard_True);
if (myFace.IsNull())
StdFail_NotDone::Raise ("BRepOffsetAPI_MakeOffset : the wire is not planar");
}
// Modified by Sergey KHROMOV - Thu Apr 26 16:04:43 2001 Begin
TopExp_Explorer anExp(myFace, TopAbs_WIRE);
TopoDS_Shape aWire1 = WorkWires.First();
TopoDS_Shape aWire2;
if (anExp.More()) {
aWire2 = anExp.Current();
if ((aWire1.Orientation() == aWire2.Orientation() && isPositive) ||
(aWire1.Orientation() == TopAbs::Complement(aWire2.Orientation()) && !isPositive)) {
TopTools_ListOfShape LWires;
TopTools_ListIteratorOfListOfShape itl;
for (itl.Initialize(WorkWires); itl.More(); itl.Next()) {
const TopoDS_Shape& W = itl.Value();
LWires.Append(W.Reversed());
}
WorkWires = LWires;
}
}
// Modified by Sergey KHROMOV - Thu Apr 26 16:04:44 2001 End
FR.Init(myFace,Standard_True);
//====================================================
// Construction des faces limites par les wires fermes.
//====================================================
TopTools_ListIteratorOfListOfShape itl(WorkWires);
for (; itl.More(); itl.Next()) {
TopoDS_Wire& W = TopoDS::Wire(itl.Value());
if (W.Closed()){
FR.Add(W);
continue;
}
TopExp::Vertices (W,VF,VL);
if (VF.IsSame(VL)) {
FR.Add(W);
}
else {
LOW.Append(W);
}
}
FR.Perform();
if (!FR.IsDone()) {
StdFail_NotDone::Raise ("BRepOffsetAPI_MakeOffset : Build Domains");
}
TopTools_ListOfShape Faces;
for (; FR.More(); FR.Next()) {
Faces.Append(FR.Current());
}
//===========================================
// Pas de wire ferme => un seul domaine
//===========================================
if (Faces.IsEmpty()) {
TopoDS_Shape aLocalShape = myFace.EmptyCopied();
TopoDS_Face F = TopoDS::Face(aLocalShape);
// TopoDS_Face F = TopoDS::Face(myFace.EmptyCopied());
TopTools_ListIteratorOfListOfShape itW(LOW);
for ( ; itW.More(); itW.Next()) {
B.Add(F,itW.Value());
}
BRepFill_OffsetWire Algo(F, myJoin);
myAlgos.Append(Algo);
return;
}
//====================================================
// Classification des wires ouverts.
//====================================================
// for (TopTools_ListIteratorOfListOfShape itF(Faces); itF.More(); itF.Next()) {
TopTools_ListIteratorOfListOfShape itF;
for (itF.Initialize(Faces) ; itF.More(); itF.Next()) {
TopoDS_Face& F = TopoDS::Face(itF.Value());
BRepAdaptor_Surface S(F,0);
Standard_Real Tol = BRep_Tool::Tolerance(F);
BRepTopAdaptor_FClass2d CL(F,Precision::Confusion());
TopTools_ListIteratorOfListOfShape itW(LOW);
while (itW.More()) {
TopoDS_Wire& W = TopoDS::Wire(itW.Value());
//=======================================================
// Choix d un point sur le wire. + projection sur la face.
//=======================================================
TopExp_Explorer exp(W,TopAbs_VERTEX);
TopoDS_Vertex V = TopoDS::Vertex(exp.Current());
gp_Pnt2d PV;
gp_Pnt P3d = BRep_Tool::Pnt(V);
Extrema_ExtPS ExtPS (P3d,S,Tol,Tol);
Standard_Real Dist2Min = Precision::Infinite();
Standard_Real Found = Standard_False;
for (Standard_Integer ie = 1; ie <= ExtPS.NbExt(); ie++) {
Standard_Real X,Y;
if (ExtPS.SquareDistance(ie) < Dist2Min) {
Dist2Min = ExtPS.SquareDistance(ie);
Found = Standard_True;
ExtPS.Point(ie).Parameter(X,Y);
PV.SetCoord(X,Y);
}
}
if ( Found && (CL.Perform(PV) == TopAbs_IN)) {
// On a trouve la face qui contient le wire on l enleve de la liste
B.Add(F,W);
LOW.Remove(itW);
}
else {
itW.Next();
}
}
}
//========================================
// Creation des algos sur chaque domaine.
//========================================
for (itF.Initialize(Faces); itF.More(); itF.Next()) {
BRepFill_OffsetWire Algo(TopoDS::Face(itF.Value()), myJoin);
myAlgos.Append(Algo);
}
}
//=======================================================================
//function : Perform
//purpose :
//=======================================================================
void BRepOffsetAPI_MakeOffset::Perform(const Standard_Real Offset,
const Standard_Real Alt)
{
StdFail_NotDone_Raise_if ( !myIsInitialized,
"BRepOffsetAPI_MakeOffset : Perform without Init");
Standard_Integer i = 1;
BRepFill_ListIteratorOfListOfOffsetWire itOW;
TopoDS_Compound Res;
BRep_Builder B;
B.MakeCompound (Res);
myLastIsLeft = (Offset <= 0);
if (Offset <= 0.) {
if (myLeft.IsEmpty()) {
// Modified by Sergey KHROMOV - Fri Apr 27 14:35:26 2001 Begin
BuildDomains(myFace,myWires,myLeft,myJoin, Standard_False);
// Modified by Sergey KHROMOV - Fri Apr 27 14:35:26 2001 End
}
for (itOW.Initialize(myLeft); itOW.More(); itOW.Next()) {
BRepFill_OffsetWire& Algo = itOW.Value();
Algo.Perform(Abs(Offset),Alt);
if (Algo.IsDone() && !Algo.Shape().IsNull()) {
B.Add(Res,Algo.Shape());
if (i == 1) myShape = Algo.Shape();
i++;
}
}
}
else {
if (myRight.IsEmpty()) {
// Modified by Sergey KHROMOV - Fri Apr 27 14:35:28 2001 Begin
BuildDomains(myFace,myWires,myRight,myJoin, Standard_True);
// Modified by Sergey KHROMOV - Fri Apr 27 14:35:35 2001 End
}
for (itOW.Initialize(myRight); itOW.More(); itOW.Next()) {
BRepFill_OffsetWire& Algo = itOW.Value();
Algo.Perform(Offset,Alt);
if (Algo.IsDone() && !Algo.Shape().IsNull()) {
B.Add(Res,Algo.Shape());
if (i == 1) myShape = Algo.Shape();
i++;
}
}
}
if (i > 2) myShape = Res;
Done();
}
//=======================================================================
//function : Build
//purpose :
//=======================================================================
void BRepOffsetAPI_MakeOffset::Build()
{
Done();
}
//=======================================================================
//function : ShapesFromShape
//purpose :
//=======================================================================
const TopTools_ListOfShape& BRepOffsetAPI_MakeOffset::Generated
(const TopoDS_Shape& S)
{
myGenerated.Clear();
BRepFill_ListIteratorOfListOfOffsetWire itOW;
BRepFill_ListOfOffsetWire* Algos;
Algos= &myLeft;
if (!myLastIsLeft) {
Algos = &myRight;
}
for (itOW.Initialize(*Algos); itOW.More(); itOW.Next()) {
BRepFill_OffsetWire& OW = itOW.Value();
TopTools_ListOfShape L;
L = OW.GeneratedShapes(S.Oriented(TopAbs_FORWARD));
myGenerated.Append(L);
L = OW.GeneratedShapes(S.Oriented(TopAbs_REVERSED));
myGenerated.Append(L);
}
return myGenerated;
}
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