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// File: BRepLib_MakeShell.cxx
// Created: Wed Jan 4 13:37:46 1995
// Author: Bruno DUMORTIER
// <dub@fuegox>
#include <BRepLib_MakeShell.ixx>
#include <BRepLib.hxx>
#include <Precision.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_BSplineSurface.hxx>
#include <Geom2d_Line.hxx>
#include <GeomAdaptor_Surface.hxx>
#include <TColGeom2d_Array1OfCurve.hxx>
#include <gp_Pnt.hxx>
#include <TopoDS.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Wire.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopTools_Array1OfShape.hxx>
#include <BRep_Builder.hxx>
//=======================================================================
//function : BRepLib_MakeShell
//purpose :
//=======================================================================
BRepLib_MakeShell::BRepLib_MakeShell() :
myError(BRepLib_EmptyShell)
{
}
//=======================================================================
//function : BRepLib_MakeShell
//purpose :
//=======================================================================
BRepLib_MakeShell::BRepLib_MakeShell(const Handle(Geom_Surface)& S,
const Standard_Boolean Segment)
{
Standard_Real UMin,UMax,VMin,VMax;
S->Bounds(UMin,UMax,VMin,VMax);
Init(S,UMin,UMax,VMin,VMax,Segment);
}
//=======================================================================
//function : BRepLib_MakeShell
//purpose :
//=======================================================================
BRepLib_MakeShell::BRepLib_MakeShell(const Handle(Geom_Surface)& S,
const Standard_Real UMin,
const Standard_Real UMax,
const Standard_Real VMin,
const Standard_Real VMax,
const Standard_Boolean Segment)
{
Init(S,UMin,UMax,VMin,VMax,Segment);
}
//=======================================================================
//function : Init
//purpose :
//=======================================================================
void BRepLib_MakeShell::Init(const Handle(Geom_Surface)& S,
const Standard_Real UMin,
const Standard_Real UMax,
const Standard_Real VMin,
const Standard_Real VMax,
const Standard_Boolean Segment)
{
Handle(Geom_Surface) BS = S;
if ( S->DynamicType() == STANDARD_TYPE(Geom_RectangularTrimmedSurface)) {
Handle(Geom_RectangularTrimmedSurface) RTS =
Handle(Geom_RectangularTrimmedSurface)::DownCast(S);
BS = RTS->BasisSurface();
}
myError = BRepLib_EmptyShell;
Standard_Real tol = Precision::Confusion();
// Make a shell from a surface
GeomAdaptor_Surface GS(BS,UMin,UMax,VMin,VMax);
Standard_Integer nu = GS.NbUIntervals(GeomAbs_C2);
Standard_Integer nv = GS.NbVIntervals(GeomAbs_C2);
Standard_Boolean uperiodic = GS.IsUPeriodic();
Standard_Boolean vperiodic = GS.IsVPeriodic();
if (nu == 0 || nv == 0) return;
// arrays of parameters and pcurves
TColStd_Array1OfReal upars(1,nu+1);
TColStd_Array1OfReal vpars(1,nv+1);
TColGeom2d_Array1OfCurve uisos(1,nu+1);
TColGeom2d_Array1OfCurve visos(1,nv+1);
Standard_Integer iu,iv;
GS.UIntervals(upars,GeomAbs_C2);
gp_Dir2d dv(0,1);
for (iu = 1; iu <= nu+1; iu++) {
Standard_Real u = upars(iu);
if (!Precision::IsInfinite(u))
uisos(iu) = new Geom2d_Line(gp_Pnt2d(u,0.),dv);
}
GS.VIntervals(vpars,GeomAbs_C2);
gp_Dir2d du(1,0);
for (iv = 1; iv <= nv+1 ; iv++) {
Standard_Real v = vpars(iv);
if (!Precision::IsInfinite(v))
visos(iv) = new Geom2d_Line(gp_Pnt2d(0.,v),du);
}
// create row by row
// create the shell
BRep_Builder B;
B.MakeShell(TopoDS::Shell(myShape));
// arrays of edges and vertices for each row
TopTools_Array1OfShape botedges(1,nu);
TopTools_Array1OfShape botvertices(1,nu+1);
// copies of the first ones for periodic case
TopTools_Array1OfShape fbotedges(1,nu);
TopTools_Array1OfShape fbotvertices(1,nu+1);
TopoDS_Face F;
TopoDS_Wire W;
TopoDS_Edge eleft,eright,etop,ebot,feleft;
TopoDS_Vertex vlb,vlt,vrb,vrt,fvlt;
// init the botedges and botvertices
if (!Precision::IsInfinite(vpars(1))) {
if (!Precision::IsInfinite(upars(1)))
B.MakeVertex(vrt,S->Value(upars(1),vpars(1)),tol);
fbotvertices(1) = botvertices(1) = vrt;
for (iu = 1; iu <= nu; iu++) {
vlt = vrt;
if (uperiodic && iu == nu)
vrt = TopoDS::Vertex(botvertices(1));
else if (!Precision::IsInfinite(upars(iu+1)))
B.MakeVertex(vrt,S->Value(upars(iu+1),vpars(1)),tol);
fbotvertices(iu+1) = botvertices(iu+1) = vrt;
B.MakeEdge(etop);
if (!vlt.IsNull()) {
vlt.Orientation(TopAbs_FORWARD);
B.Add(etop,vlt);
}
if (!vrt.IsNull()) {
vrt.Orientation(TopAbs_REVERSED);
B.Add(etop,vrt);
}
fbotedges(iu) = botedges(iu) = etop;
}
}
for (iv = 1; iv <= nv; iv++) {
// compute the first edge and vertices of the line
vrb = TopoDS::Vertex(botvertices(1));
if (vperiodic && iv == nv) {
vrt = TopoDS::Vertex(fbotvertices(1));
}
else {
vrt.Nullify();
if (!Precision::IsInfinite(vpars(iv+1))) {
if (!Precision::IsInfinite(upars(1)))
B.MakeVertex(vrt,S->Value(upars(1),vpars(iv+1)),tol);
}
}
eright.Nullify();
if (!Precision::IsInfinite(upars(1))) {
B.MakeEdge(eright);
if (!vrb.IsNull()) {
vrb.Orientation(TopAbs_FORWARD);
B.Add(eright,vrb);
}
if (!vrt.IsNull()) {
vrt.Orientation(TopAbs_REVERSED);
B.Add(eright,vrt);
}
}
fvlt = vrt;
feleft = eright;
// make the row of faces
for (iu = 1; iu <= nu; iu++) {
// create the face at iu, iv
// the surface
Handle(Geom_Surface) SS = Handle(Geom_Surface)::DownCast(BS->Copy());
if (GS.GetType() == GeomAbs_BSplineSurface && Segment) {
Handle(Geom_BSplineSurface)::DownCast(SS)
->Segment(upars(iu),upars(iu+1),
vpars(iv),vpars(iv+1) );
}
B.MakeFace(F,SS,tol);
// the wire
B.MakeWire(W);
// the vertices
vlb = vrb;
vrb = TopoDS::Vertex(botvertices(iu+1));
vlt = vrt;
if (uperiodic && iu == nu)
vrt = fvlt;
else {
vrt.Nullify();
if (!Precision::IsInfinite(vpars(iv+1))) {
if (!Precision::IsInfinite(upars(iu+1)))
B.MakeVertex(vrt,S->Value(upars(iu+1),vpars(iv+1)),tol);
}
}
botvertices(iu) = vlt;
botvertices(iu+1) = vrt;
// the edges
eleft = eright;
if (uperiodic && iu == nu)
eright = feleft;
else {
eright.Nullify();
if (!Precision::IsInfinite(upars(iu+1))) {
B.MakeEdge(eright);
if (!vrb.IsNull()) {
vrb.Orientation(TopAbs_FORWARD);
B.Add(eright,vrb);
}
if (!vrt.IsNull()) {
vrt.Orientation(TopAbs_REVERSED);
B.Add(eright,vrt);
}
}
}
if ( uperiodic && nu == 1) {
if (!eleft.IsNull() && !eright.IsNull()) {
B.UpdateEdge(eleft,uisos(2),uisos(1),F,tol);
B.Range(eleft,F,vpars(iv),vpars(iv+1));
}
}
else {
if (!eleft.IsNull()) {
B.UpdateEdge(eleft,uisos(iu),F,tol);
B.Range(eleft,F,vpars(iv),vpars(iv+1));
}
if (!eright.IsNull()) {
B.UpdateEdge(eright,uisos(iu+1),F,tol);
B.Range(eright,F,vpars(iv),vpars(iv+1));
}
}
ebot = TopoDS::Edge(botedges(iu));
if (vperiodic && iv == nv)
etop = TopoDS::Edge(fbotedges(iu));
else {
etop.Nullify();
if (!Precision::IsInfinite(vpars(iv+1))) {
B.MakeEdge(etop);
if (!vlt.IsNull()) {
vlt.Orientation(TopAbs_FORWARD);
B.Add(etop,vlt);
}
if (!vrt.IsNull()) {
vrt.Orientation(TopAbs_REVERSED);
B.Add(etop,vrt);
}
}
}
if ( vperiodic && nv == 1) {
if (!ebot.IsNull() && !etop.IsNull()) {
B.UpdateEdge(ebot,visos(1),visos(2),F,tol);
B.Range(ebot,F,vpars(iv),vpars(iv+1));
}
}
else {
if (!ebot.IsNull()) {
B.UpdateEdge(ebot,visos(iv),F,tol);
B.Range(ebot,F,upars(iu),upars(iu+1));
}
if (!etop.IsNull()) {
B.UpdateEdge(etop,visos(iv+1),F,tol);
B.Range(etop,F,upars(iu),upars(iu+1));
}
}
botedges(iu) = etop;
if (!eleft.IsNull()) {
eleft.Orientation(TopAbs_REVERSED);
B.Add(W,eleft);
}
if (!ebot.IsNull()) {
ebot.Orientation(TopAbs_FORWARD);
B.Add(W,ebot);
}
if (!eright.IsNull()) {
eright.Orientation(TopAbs_FORWARD);
B.Add(W,eright);
}
if (!etop.IsNull()) {
etop.Orientation(TopAbs_REVERSED);
B.Add(W,etop);
}
B.Add(F,W);
B.Add(myShape,F);
}
}
// codage des courbes 3d et regularites.
BRepLib::BuildCurves3d(myShape,tol);
BRepLib::EncodeRegularity(myShape);
myError = BRepLib_ShellDone;
Done();
}
//=======================================================================
//function : Error
//purpose :
//=======================================================================
BRepLib_ShellError BRepLib_MakeShell::Error() const
{
return myError;
}
//=======================================================================
//function : TopoDS_Shell&
//purpose :
//=======================================================================
const TopoDS_Shell& BRepLib_MakeShell::Shell() const
{
return TopoDS::Shell(myShape);
}
//=======================================================================
//function : TopoDS_Shell
//purpose :
//=======================================================================
BRepLib_MakeShell::operator TopoDS_Shell() const
{
return Shell();
}
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