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//File gp_Parab.lxx JCV/12/10/90
#include <gp_Lin.hxx>
#include <Standard_ConstructionError.hxx>
inline gp_Parab::gp_Parab () :
focalLength (RealLast())
{ }
inline gp_Parab::gp_Parab (const gp_Ax2& A2,
const Standard_Real Focal) :
pos(A2),
focalLength (Focal)
{ Standard_ConstructionError_Raise_if(Focal < 0.0,""); }
inline gp_Parab::gp_Parab (const gp_Ax1& D,
const gp_Pnt& F)
{
gp_Lin Droite(D);
focalLength = Droite.Distance(F) / 2.;
gp_Ax1 Ax = Droite.Normal(F).Position();
gp_Ax1 Ay = Droite.Position();
const gp_Dir& DD = Ax.Direction();
pos = gp_Ax2 (gp_Pnt(F.X() - focalLength * DD.X(),
F.Y() - focalLength * DD.Y(),
F.Z() - focalLength * DD.Z()),
Ax.Direction().Crossed(Ay.Direction()),
Ax.Direction());
}
inline void gp_Parab::SetAxis (const gp_Ax1& A1)
{ pos.SetAxis (A1); }
inline void gp_Parab::SetFocal (const Standard_Real Focal)
{
Standard_ConstructionError_Raise_if(Focal < 0.0,"");
focalLength = Focal;
}
inline void gp_Parab::SetLocation (const gp_Pnt& P)
{ pos.SetLocation(P); }
inline void gp_Parab::SetPosition (const gp_Ax2& A2)
{ pos = A2; }
inline const gp_Ax1& gp_Parab::Axis () const
{ return pos.Axis(); }
inline gp_Ax1 gp_Parab::Directrix() const
{
const gp_Pnt& PP = pos.Location ();
const gp_Dir& DD = pos.XDirection();
gp_Pnt P (PP.X() - focalLength * DD.X(),
PP.Y() - focalLength * DD.Y(),
PP.Z() - focalLength * DD.Z());
return gp_Ax1 (P, pos.YDirection());
}
inline Standard_Real gp_Parab::Focal() const
{ return focalLength; }
inline gp_Pnt gp_Parab::Focus() const
{
const gp_Pnt& PP = pos.Location ();
const gp_Dir& DD = pos.XDirection();
return gp_Pnt (PP.X() + focalLength * DD.X(),
PP.Y() + focalLength * DD.Y(),
PP.Z() + focalLength * DD.Z());
}
inline const gp_Pnt& gp_Parab::Location () const
{ return pos.Location(); }
inline Standard_Real gp_Parab::Parameter() const
{ return 2.0 * focalLength; }
inline const gp_Ax2& gp_Parab::Position() const
{ return pos; }
inline gp_Ax1 gp_Parab::XAxis () const
{ return gp_Ax1 (pos.Location(), pos.XDirection()); }
inline gp_Ax1 gp_Parab::YAxis () const
{ return gp_Ax1 (pos.Location(), pos.YDirection()); }
inline void gp_Parab::Rotate (const gp_Ax1& A1,
const Standard_Real Ang)
{ pos.Rotate (A1, Ang); }
inline gp_Parab gp_Parab::Rotated (const gp_Ax1& A1,
const Standard_Real Ang) const
{
gp_Parab Prb = *this;
Prb.pos.Rotate (A1, Ang);
return Prb;
}
inline void gp_Parab::Scale (const gp_Pnt& P,
const Standard_Real S)
{
focalLength *= S;
if (focalLength < 0) focalLength = - focalLength;
pos.Scale (P, S);
}
inline gp_Parab gp_Parab::Scaled (const gp_Pnt& P,
const Standard_Real S) const
{
gp_Parab Prb = *this;
Prb.focalLength *= S;
if (Prb.focalLength < 0) Prb.focalLength = - Prb.focalLength;
Prb.pos.Scale (P, S);
return Prb;
}
inline void gp_Parab::Transform (const gp_Trsf& T)
{
focalLength *= T.ScaleFactor();
if (focalLength < 0) focalLength = - focalLength;
pos.Transform (T);
}
inline gp_Parab gp_Parab::Transformed (const gp_Trsf& T) const
{
gp_Parab Prb = *this;
Prb.focalLength *= T.ScaleFactor();
if (Prb.focalLength < 0) Prb.focalLength = - Prb.focalLength;
Prb.pos.Transform (T);
return Prb;
}
inline void gp_Parab::Translate (const gp_Vec& V)
{ pos.Translate (V); }
inline gp_Parab gp_Parab::Translated (const gp_Vec& V) const
{
gp_Parab Prb = *this;
Prb.pos.Translate (V);
return Prb;
}
inline void gp_Parab::Translate (const gp_Pnt& P1,
const gp_Pnt& P2)
{ pos.Translate (P1, P2); }
inline gp_Parab gp_Parab::Translated (const gp_Pnt& P1,
const gp_Pnt& P2) const
{
gp_Parab Prb = *this;
Prb.pos.Translate (P1, P2);
return Prb;
}
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