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// File: GeomConvert_BSplineSurfaceToBezierSurface.cxx
// Created: Tue Mar 12 17:33:28 1996
// Author: Bruno DUMORTIER
// <dub@fuegox>
#include <GeomConvert_BSplineSurfaceToBezierSurface.ixx>
#include <TColgp_Array2OfPnt.hxx>
#include <TColStd_Array2OfReal.hxx>
//=======================================================================
//function : GeomConvert_BSplineSurfaceToBezierSurface
//purpose :
//=======================================================================
GeomConvert_BSplineSurfaceToBezierSurface::GeomConvert_BSplineSurfaceToBezierSurface(const Handle(Geom_BSplineSurface)& BasisSurface)
{
mySurface = Handle(Geom_BSplineSurface)::DownCast(BasisSurface->Copy());
Standard_Real U1,U2,V1,V2;
mySurface->Bounds(U1,U2,V1,V2);
mySurface->Segment(U1,U2,V1,V2);
mySurface->IncreaseUMultiplicity(mySurface->FirstUKnotIndex(),
mySurface->LastUKnotIndex(),
mySurface->UDegree());
mySurface->IncreaseVMultiplicity(mySurface->FirstVKnotIndex(),
mySurface->LastVKnotIndex(),
mySurface->VDegree());
}
//=======================================================================
//function : GeomConvert_BSplineSurfaceToBezierSurface
//purpose :
//=======================================================================
GeomConvert_BSplineSurfaceToBezierSurface::GeomConvert_BSplineSurfaceToBezierSurface
(const Handle(Geom_BSplineSurface)& BasisSurface,
const Standard_Real U1,
const Standard_Real U2,
const Standard_Real V1,
const Standard_Real V2,
const Standard_Real ParametricTolerance)
{
if ( (U2 - U1 < ParametricTolerance) ||
(V2 - V1 < ParametricTolerance) )
Standard_DomainError::Raise("GeomConvert_BSplineSurfaceToBezierSurface");
Standard_Real Uf=U1, Ul=U2, Vf=V1, Vl=V2, PTol = ParametricTolerance/2;
Standard_Integer I1, I2;
mySurface = Handle(Geom_BSplineSurface)::DownCast(BasisSurface->Copy());
mySurface->LocateU(U1, PTol, I1, I2);
if (I1==I2) { // On est sur le noeud
if ( mySurface->UKnot(I1) > U1) Uf = mySurface->UKnot(I1);
}
mySurface->LocateU(U2, PTol, I1, I2);
if (I1==I2) { // On est sur le noeud
if ( mySurface->UKnot(I1) < U2) Ul = mySurface->UKnot(I1);
}
mySurface->LocateV(V1, PTol, I1, I2);
if (I1==I2) { // On est sur le noeud
if ( mySurface->VKnot(I1) > V1) Vf = mySurface->VKnot(I1);
}
mySurface->LocateV(V2, PTol, I1, I2);
if (I1==I2) { // On est sur le noeud
if ( mySurface->VKnot(I1) < V2) Vl = mySurface->VKnot(I1);
}
mySurface->Segment(Uf, Ul, Vf, Vl);
mySurface->IncreaseUMultiplicity(mySurface->FirstUKnotIndex(),
mySurface->LastUKnotIndex(),
mySurface->UDegree());
mySurface->IncreaseVMultiplicity(mySurface->FirstVKnotIndex(),
mySurface->LastVKnotIndex(),
mySurface->VDegree());
}
//=======================================================================
//function : Patch
//purpose :
//=======================================================================
Handle(Geom_BezierSurface) GeomConvert_BSplineSurfaceToBezierSurface::Patch
(const Standard_Integer UIndex,
const Standard_Integer VIndex)
{
if (UIndex < 1 || UIndex > mySurface->NbUKnots()-1 ||
VIndex < 1 || VIndex > mySurface->NbVKnots()-1 ) {
Standard_OutOfRange::Raise("GeomConvert_BSplineSurfaceToBezierSurface");
}
Standard_Integer UDeg = mySurface->UDegree();
Standard_Integer VDeg = mySurface->VDegree();
TColgp_Array2OfPnt Poles(1,UDeg+1,1,VDeg+1);
Handle(Geom_BezierSurface) S;
if ( mySurface->IsURational() || mySurface->IsVRational()) {
TColStd_Array2OfReal Weights(1,UDeg+1,1,VDeg+1);
for ( Standard_Integer i = 1; i <= UDeg+1; i++) {
Standard_Integer CurI = i+UDeg*(UIndex-1);
for ( Standard_Integer j = 1; j <= VDeg+1; j++) {
Poles(i,j) = mySurface->Pole(CurI,j+VDeg*(VIndex-1));
Weights(i,j) = mySurface->Weight(CurI,j+VDeg*(VIndex-1));
}
}
S = new Geom_BezierSurface(Poles,Weights);
}
else {
for ( Standard_Integer i = 1; i <= UDeg+1; i++) {
Standard_Integer CurI = i+UDeg*(UIndex-1);
for ( Standard_Integer j = 1; j <= VDeg+1; j++) {
Poles(i,j) = mySurface->Pole(CurI,j+VDeg*(VIndex-1));
}
}
S = new Geom_BezierSurface(Poles);
}
return S;
}
//=======================================================================
//function : Patches
//purpose :
//=======================================================================
void GeomConvert_BSplineSurfaceToBezierSurface::Patches
(TColGeom_Array2OfBezierSurface& Surfaces)
{
Standard_Integer NbU = NbUPatches();
Standard_Integer NbV = NbVPatches();
for (Standard_Integer i = 1; i <= NbU; i++) {
for (Standard_Integer j = 1; j <= NbV; j++) {
Surfaces(i,j) = Patch(i,j);
}
}
}
//=======================================================================
//function : UKnots
//purpose :
//=======================================================================
void GeomConvert_BSplineSurfaceToBezierSurface::UKnots
(TColStd_Array1OfReal& TKnots) const
{
Standard_Integer ii, kk;
for (ii = 1, kk = TKnots.Lower();
ii <= mySurface->NbUKnots(); ii++, kk++)
TKnots(kk) = mySurface->UKnot(ii);
}
//=======================================================================
//function : VKnots
//purpose :
//=======================================================================
void GeomConvert_BSplineSurfaceToBezierSurface::VKnots
(TColStd_Array1OfReal& TKnots) const
{
Standard_Integer ii, kk;
for (ii = 1, kk = TKnots.Lower();
ii <= mySurface->NbVKnots(); ii++, kk++)
TKnots(kk) = mySurface->VKnot(ii);
}
//=======================================================================
//function : NbUPatches
//purpose :
//=======================================================================
Standard_Integer GeomConvert_BSplineSurfaceToBezierSurface::NbUPatches() const
{
return (mySurface->NbUKnots()-1);
}
//=======================================================================
//function : NbVPatches
//purpose :
//=======================================================================
Standard_Integer GeomConvert_BSplineSurfaceToBezierSurface::NbVPatches() const
{
return (mySurface->NbVKnots()-1);
}
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