// Created on: 1995-03-06
// Created by: Laurent PAINNOT
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

#include <Poly_Triangulation.hxx>

#include <gp_Pnt.hxx>
#include <Poly_Triangle.hxx>
#include <Standard_DomainError.hxx>
#include <Standard_NullObject.hxx>
#include <Standard_Type.hxx>

IMPLEMENT_STANDARD_RTTIEXT (Poly_Triangulation, MMgt_TShared)

//=======================================================================
//function : Poly_Triangulation
//purpose  : 
//=======================================================================
Poly_Triangulation::Poly_Triangulation(const Standard_Integer theNbNodes,
                                       const Standard_Integer theNbTriangles,
                                       const Standard_Boolean theHasUVNodes)
: myDeflection(0),
  myNodes     (1, theNbNodes),
  myTriangles (1, theNbTriangles)
{
  if (theHasUVNodes) myUVNodes = new TColgp_HArray1OfPnt2d(1, theNbNodes);
}

//=======================================================================
//function : Poly_Triangulation
//purpose  : 
//=======================================================================

Poly_Triangulation::Poly_Triangulation(const TColgp_Array1OfPnt&    theNodes,
                                       const Poly_Array1OfTriangle& theTriangles)
: myDeflection(0),
  myNodes     (1, theNodes.Length()),
  myTriangles (1, theTriangles.Length())
{
  myNodes = theNodes;
  myTriangles = theTriangles;
}

//=======================================================================
//function : Poly_Triangulation
//purpose  : 
//=======================================================================

Poly_Triangulation::Poly_Triangulation(const TColgp_Array1OfPnt&    theNodes,
                                       const TColgp_Array1OfPnt2d&  theUVNodes,
                                       const Poly_Array1OfTriangle& theTriangles)
: myDeflection(0),
  myNodes     (1, theNodes.Length()),
  myTriangles (1, theTriangles.Length())
{
  myNodes = theNodes;
  myTriangles = theTriangles;
  myUVNodes = new TColgp_HArray1OfPnt2d (1, theNodes.Length());
  myUVNodes->ChangeArray1() = theUVNodes;
}

//=======================================================================
//function : Copy
//purpose  : 
//=======================================================================

Handle(Poly_Triangulation) Poly_Triangulation::Copy() const
{
  Handle(Poly_Triangulation) aCopy;
  if (HasUVNodes())
    aCopy = new Poly_Triangulation(Nodes(), UVNodes(), Triangles());
  else
    aCopy = new Poly_Triangulation(Nodes(), Triangles());
  aCopy->Deflection(myDeflection);
  if (HasNormals())
    aCopy->myNormals = new TShort_HArray1OfShortReal(myNormals->Array1());

  return aCopy;
}

//=======================================================================
//function : Poly_Triangulation
//purpose  : 
//=======================================================================

Poly_Triangulation::Poly_Triangulation (const Handle(Poly_Triangulation)& theTriangulation)
: myDeflection ( theTriangulation->myDeflection ),
  myNodes(theTriangulation->Nodes()),
  myTriangles(theTriangulation->Triangles())
{
  if (theTriangulation->HasUVNodes())
  {
    myUVNodes = new TColgp_HArray1OfPnt2d(theTriangulation->myUVNodes->Array1());
  }
  if (theTriangulation->HasNormals())
  {
    myNormals = new TShort_HArray1OfShortReal(theTriangulation->myNormals->Array1());
  }
}

//=======================================================================
//function : Deflection
//purpose  : 
//=======================================================================

void Poly_Triangulation::Deflection(const Standard_Real theDeflection)
{
  myDeflection = theDeflection;
}

//=======================================================================
//function : RemoveUVNodes
//purpose  : 
//=======================================================================

void Poly_Triangulation::RemoveUVNodes()
{
  myUVNodes.Nullify();
}

//=======================================================================
//function : Node
//purpose  : 
//=======================================================================

const gp_Pnt& Poly_Triangulation::Node (const Standard_Integer theIndex) const
{
  if (theIndex < 1 || theIndex > myNodes.Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::Node : index out of range");
  }
  return myNodes.Value (theIndex);
}

//=======================================================================
//function : ChangeNode
//purpose  : 
//=======================================================================

gp_Pnt& Poly_Triangulation::ChangeNode (const Standard_Integer theIndex)
{
  if (theIndex < 1 || theIndex > myNodes.Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::ChangeNode : index out of range");
  }
  return myNodes.ChangeValue (theIndex);
}

//=======================================================================
//function : UVNode
//purpose  : 
//=======================================================================

const gp_Pnt2d& Poly_Triangulation::UVNode (const Standard_Integer theIndex) const
{
  if (myUVNodes.IsNull() || theIndex < 1 || theIndex > myUVNodes->Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::UVNode : index out of range");
  }
  return myUVNodes->Value (theIndex);
}

//=======================================================================
//function : ChangeUVNode
//purpose  : 
//=======================================================================

gp_Pnt2d& Poly_Triangulation::ChangeUVNode (const Standard_Integer theIndex)
{
  if (myUVNodes.IsNull() || theIndex < 1 || theIndex > myUVNodes->Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::ChangeUVNode : index out of range");
  }
  return myUVNodes->ChangeValue (theIndex);
}

//=======================================================================
//function : Triangle
//purpose  : 
//=======================================================================

const Poly_Triangle& Poly_Triangulation::Triangle (const Standard_Integer theIndex) const
{
  if (theIndex < 1 || theIndex > myTriangles.Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::Triangle : index out of range");
  }
  return myTriangles.Value (theIndex);
}

//=======================================================================
//function : ChangeTriangle
//purpose  : 
//=======================================================================

Poly_Triangle& Poly_Triangulation::ChangeTriangle (const Standard_Integer theIndex)
{
  if (theIndex < 1 || theIndex > myTriangles.Size())
  {
    throw Standard_OutOfRange ("Poly_Triangulation::ChangeTriangle : index out of range");
  }
  return myTriangles.ChangeValue (theIndex);
}

//=======================================================================
//function : SetNormals
//purpose  : 
//=======================================================================

void Poly_Triangulation::SetNormals (const Handle(TShort_HArray1OfShortReal)& theNormals)
{

  if(theNormals.IsNull() || theNormals->Length() != 3 * NbNodes()) {
    throw Standard_DomainError("Poly_Triangulation::SetNormals : wrong length");
  }

  myNormals = theNormals;
}

//=======================================================================
//function : Normals
//purpose  : 
//=======================================================================

const TShort_Array1OfShortReal& Poly_Triangulation::Normals() const
{

  if(myNormals.IsNull() || myNormals->Length() != 3 * NbNodes()) {
    throw Standard_NullObject("Poly_Triangulation::Normals : "
                              "wrong length or null array");
  }

  return myNormals->Array1();
}

//=======================================================================
//function : ChangeNormals
//purpose  : 
//=======================================================================

TShort_Array1OfShortReal& Poly_Triangulation::ChangeNormals()
{

  if(myNormals.IsNull() || myNormals->Length() != 3 * NbNodes()) {
    throw Standard_NullObject("Poly_Triangulation::ChangeNormals : "
                              "wrong length or null array");
  }

  return myNormals->ChangeArray1();
}

//=======================================================================
//function : HasNormals
//purpose  : 
//=======================================================================

Standard_Boolean Poly_Triangulation::HasNormals() const
{
  if(myNormals.IsNull() || myNormals->Length() != 3 * NbNodes()) {
    return Standard_False;
  }
  return Standard_True;
}

//=======================================================================
//function : SetNormal
//purpose  : 
//=======================================================================

void Poly_Triangulation::SetNormal (const Standard_Integer theIndex, const gp_Dir& theNormal)
{
  if (myNormals.IsNull() || theIndex < 1 || theIndex > myNodes.Size())
  {
    throw Standard_NullObject ("Poly_Triangulation::SetNormal : empty array or index out of range");
  }

  myNormals->ChangeValue (theIndex * 3 - 2) = (Standard_ShortReal) theNormal.X();
  myNormals->ChangeValue (theIndex * 3 - 1) = (Standard_ShortReal) theNormal.Y();
  myNormals->ChangeValue (theIndex * 3)     = (Standard_ShortReal) theNormal.Z();
}

//=======================================================================
//function : Normal
//purpose  : 
//=======================================================================

const gp_Dir Poly_Triangulation::Normal (const Standard_Integer theIndex) const
{
  if (myNormals.IsNull() || theIndex < 1 || theIndex > myNodes.Size())
  {
    throw Standard_NullObject ("Poly_Triangulation::Normal : empty array or index out of range");
  }

  gp_Dir N;
  N.SetX(myNormals->Value(theIndex * 3 - 2));
  N.SetY(myNormals->Value(theIndex * 3 - 1));
  N.SetZ(myNormals->Value(theIndex * 3));

  return N;
}