// Created on: 1992-07-09
// Created by: Christophe MARION
// Copyright (c) 1992-1999 Matra Datavision
// Copyright (c) 1999-2012 OPEN CASCADE SAS
//
// The content of this file is subject to the Open CASCADE Technology Public
// License Version 6.5 (the "License"). You may not use the content of this file
// except in compliance with the License. Please obtain a copy of the License
// at http://www.opencascade.org and read it completely before using this file.
//
// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
//
// The Original Code and all software distributed under the License is
// distributed on an "AS IS" basis, without warranty of any kind, and the
// Initial Developer hereby disclaims all such warranties, including without
// limitation, any warranties of merchantability, fitness for a particular
// purpose or non-infringement. Please see the License for the specific terms
// and conditions governing the rights and limitations under the License.


#include <Standard_NoSuchObject.hxx>
#include <gp_Vec.hxx>
#include <gp_Pnt.hxx>
#include <gp_Lin.hxx>
#include <V3d_View.hxx>
#include <V3d.hxx>

//=======================================================================
//function : Perspective
//purpose  :
//=======================================================================

inline Standard_Boolean Select3D_Projector::Perspective() const
{ return myPersp; }

//=======================================================================
//function : Transformation
//purpose  :
//=======================================================================

inline const gp_GTrsf& Select3D_Projector::Transformation() const
{ return myGTrsf; }

//=======================================================================
//function : InvertedTransformation
//purpose  :
//=======================================================================

inline const gp_GTrsf& Select3D_Projector::InvertedTransformation() const
{ return myInvTrsf; }

//=======================================================================
//function : FullTransformation
//purpose  :
//=======================================================================

inline const gp_Trsf& Select3D_Projector::FullTransformation() const
{ return myScaledTrsf; }

//=======================================================================
//function : Focus
//purpose  :
//=======================================================================

inline Standard_Real Select3D_Projector::Focus() const
{
  Standard_NoSuchObject_Raise_if(!myPersp,
				 "Select3D_Projector::Not a Perpective");
  return myFocus;
}

//=======================================================================
//function : Transform
//purpose  :
//=======================================================================

inline void Select3D_Projector::Transform (gp_Vec& D) const
{
  gp_XYZ coord = D.XYZ();
  if (myGTrsf.Form() == gp_Identity || myGTrsf.Form() == gp_Translation) { }
  else if (myGTrsf.Form() == gp_PntMirror) { coord.Reverse(); }
  else { coord.Multiply (myGTrsf.VectorialPart()); }
  D.SetXYZ(coord);
}

//=======================================================================
//function : Transform
//purpose  :
//=======================================================================

inline void Select3D_Projector::Transform (gp_Pnt& Pnt) const
{
  gp_XYZ xyz = Pnt.XYZ();
  myGTrsf.Transforms(xyz);
  Pnt = gp_Pnt(xyz);
}


inline const Handle(V3d_View)& Select3D_Projector::View() const
{return myView;}

inline void Select3D_Projector::Transform (gp_Lin& Lin, const gp_GTrsf& T) const
{
  gp_Ax1 ax1 = Lin.Position();
  gp_XYZ xyz = ax1.Location().XYZ();
  T.Transforms(xyz);
  ax1.SetLocation(gp_Pnt(xyz));
  gp_Dir dir = ax1.Direction();
  gp_XYZ coord = dir.XYZ();
  if (T.Form() == gp_Identity ||  T.Form() == gp_Translation)    { }
  else if (T.Form() == gp_PntMirror) { coord.Reverse(); }
  else {
    coord.Multiply (T.VectorialPart());
    Standard_Real D = coord.Modulus();
    coord.Divide(D);
  }
  dir.SetXYZ(coord);
  ax1.SetDirection(dir);
  Lin.SetPosition(ax1);
}

inline void Select3D_Projector::Transform (gp_Pnt& Pnt, const gp_GTrsf& T) const
{
  gp_XYZ xyz = Pnt.XYZ();
  T.Transforms(xyz);
  Pnt = gp_Pnt(xyz);
}

inline Standard_Real Select3D_Projector::DepthMin() const
{
  return myDepthMin;
}

inline Standard_Real Select3D_Projector::DepthMax() const
{
  return myDepthMax;
}