OCCT

// Created on: 1991-09-27
// Created by: Christophe MARION
// Copyright (c) 1991-1999 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 <BRepPrim_GWedge.hxx>
#include <ElCLib.hxx>
#include <ElSLib.hxx>
#include <gp_Ax2.hxx>
#include <gp_Lin.hxx>
#include <gp_Pln.hxx>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>
#include <Precision.hxx>
#include <Standard_DomainError.hxx>
#include <TopoDS_Edge.hxx>
#include <TopoDS_Shell.hxx>
#include <TopoDS_Vertex.hxx>

#define NBFACES 6
#define NBWIRES 6
#define NBEDGES 12
#define NBVERTICES 8

static const int num[6]    = {0, 1, 2, 3, 4, 5};
static const int val[6]    = {0, 4, 0, 2, 0, 1};
static const int tab[6][6] = {{-1, -1, 0, 1, 8, 9},
                              {-1, -1, 2, 3, 10, 11},
                              {0, 2, -1, -1, 4, 5},
                              {1, 3, -1, -1, 6, 7},
                              {8, 10, 4, 6, -1, -1},
                              {9, 11, 5, 7, -1, -1}};

//=======================================================================
// function : BRepPrim_Wedge_NumDir1
// purpose  : when giving a direction return the range of the face
//=======================================================================

static int BRepPrim_Wedge_NumDir1(const BRepPrim_Direction d1)
{
  return num[d1];
}

//=======================================================================
// function : BRepPrim_Wedge_NumDir2
// purpose  : when giving two directions return the range of the edge
//=======================================================================

static int BRepPrim_Wedge_NumDir2(const BRepPrim_Direction d1, const BRepPrim_Direction d2)
{
  int i1 = BRepPrim_Wedge_NumDir1(d1);
  int i2 = BRepPrim_Wedge_NumDir1(d2);
  if (i1 / 2 == i2 / 2)
  {
    throw Standard_DomainError();
  }
  return tab[i1][i2];
}

//=======================================================================
// function : BRepPrim_Wedge_NumDir3
// purpose  : when giving three directions return the range of the vertex
//=======================================================================

static int BRepPrim_Wedge_NumDir3(const BRepPrim_Direction d1,
                                  const BRepPrim_Direction d2,
                                  const BRepPrim_Direction d3)
{
  int i1 = BRepPrim_Wedge_NumDir1(d1);
  int i2 = BRepPrim_Wedge_NumDir1(d2);
  int i3 = BRepPrim_Wedge_NumDir1(d3);
  if ((i1 / 2 == i2 / 2) || (i2 / 2 == i3 / 2) || (i3 / 2 == i1 / 2))
  {
    throw Standard_DomainError();
  }
  return val[i1] + val[i2] + val[i3];
}

//=======================================================================
// function : BRepPrim_Wedge_Check
// purpose  : raise Standard_DomainError if something was built
//=======================================================================

static void BRepPrim_Wedge_Check(const bool V[], const bool E[], const bool W[], const bool F[])
{
  int i;
  for (i = 0; i < NBVERTICES; i++)
  {
    if (V[i])
    {
      throw Standard_DomainError();
    }
  }
  for (i = 0; i < NBEDGES; i++)
  {
    if (E[i])
    {
      throw Standard_DomainError();
    }
  }
  for (i = 0; i < NBWIRES; i++)
  {
    if (W[i])
    {
      throw Standard_DomainError();
    }
  }
  for (i = 0; i < NBFACES; i++)
  {
    if (F[i])
    {
      throw Standard_DomainError();
    }
  }
}

//=================================================================================================

static void BRepPrim_Wedge_Init(bool& S, bool V[], bool E[], bool W[], bool F[])
{
  int i;
  S = false;
  for (i = 0; i < NBVERTICES; i++)
  {
    V[i] = false;
  }
  for (i = 0; i < NBEDGES; i++)
  {
    E[i] = false;
  }
  for (i = 0; i < NBWIRES; i++)
  {
    W[i] = false;
  }
  for (i = 0; i < NBFACES; i++)
  {
    F[i] = false;
  }
}

BRepPrim_GWedge::BRepPrim_GWedge()
    : XMin(0),
      XMax(0),
      YMin(0),
      YMax(0),
      ZMin(0),
      ZMax(0),
      Z2Min(0),
      Z2Max(0),
      X2Min(0),
      X2Max(0)
{
  for (int i = 0; i < NBFACES; i++)
  {
    myInfinite[i] = false;
  }

  BRepPrim_Wedge_Init(ShellBuilt, VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
}

//=================================================================================================

BRepPrim_GWedge::BRepPrim_GWedge(const BRepPrim_Builder& B,
                                 const gp_Ax2&           Axes,
                                 const double            dx,
                                 const double            dy,
                                 const double            dz)
    : myBuilder(B),
      myAxes(Axes),
      XMin(0),
      XMax(dx),
      YMin(0),
      YMax(dy),
      ZMin(0),
      ZMax(dz),
      Z2Min(0),
      Z2Max(dz),
      X2Min(0),
      X2Max(dx)
{
  for (int i = 0; i < NBFACES; i++)
  {
    myInfinite[i] = false;
  }

  BRepPrim_Wedge_Init(ShellBuilt, VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
}

//=================================================================================================

BRepPrim_GWedge::BRepPrim_GWedge(const BRepPrim_Builder& B,
                                 const gp_Ax2&           Axes,
                                 const double            dx,
                                 const double            dy,
                                 const double            dz,
                                 const double            ltx)
    : myBuilder(B),
      myAxes(Axes),
      XMin(0),
      XMax(dx),
      YMin(0),
      YMax(dy),
      ZMin(0),
      ZMax(dz),
      Z2Min(0),
      Z2Max(dz),
      X2Min(0),
      X2Max(ltx)
{
  for (int i = 0; i < NBFACES; i++)
  {
    myInfinite[i] = false;
  }

  BRepPrim_Wedge_Init(ShellBuilt, VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
}

//=======================================================================
// function : BRepPrim_GWedge
// purpose  : build a wedge by giving all the fields
//=======================================================================

BRepPrim_GWedge::BRepPrim_GWedge(const BRepPrim_Builder& B,
                                 const gp_Ax2&           Axes,
                                 const double            xmin,
                                 const double            ymin,
                                 const double            zmin,
                                 const double            z2min,
                                 const double            x2min,
                                 const double            xmax,
                                 const double            ymax,
                                 const double            zmax,
                                 const double            z2max,
                                 const double            x2max)
    : myBuilder(B),
      myAxes(Axes),
      XMin(xmin),
      XMax(xmax),
      YMin(ymin),
      YMax(ymax),
      ZMin(zmin),
      ZMax(zmax),
      Z2Min(z2min),
      Z2Max(z2max),
      X2Min(x2min),
      X2Max(x2max)
{
  for (int i = 0; i < NBFACES; i++)
  {
    myInfinite[i] = false;
  }

  BRepPrim_Wedge_Init(ShellBuilt, VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
}

//=======================================================================
// function : Axes,
//           GetXMin, GetYMin, GetZMin, GetZ2Min, GetX2Min
//           GetXMax, GetYMax, GetZMax, GetZ2Max, GetX2Max
// purpose  : trivial
//=======================================================================

gp_Ax2 BRepPrim_GWedge::Axes() const
{
  return myAxes;
}

double BRepPrim_GWedge::GetXMin() const
{
  return XMin;
}

double BRepPrim_GWedge::GetYMin() const
{
  return YMin;
}

double BRepPrim_GWedge::GetZMin() const
{
  return ZMin;
}

double BRepPrim_GWedge::GetZ2Min() const
{
  return Z2Min;
}

double BRepPrim_GWedge::GetX2Min() const
{
  return X2Min;
}

double BRepPrim_GWedge::GetXMax() const
{
  return XMax;
}

double BRepPrim_GWedge::GetYMax() const
{
  return YMax;
}

double BRepPrim_GWedge::GetZMax() const
{
  return ZMax;
}

double BRepPrim_GWedge::GetZ2Max() const
{
  return Z2Max;
}

double BRepPrim_GWedge::GetX2Max() const
{
  return X2Max;
}

//=================================================================================================

void BRepPrim_GWedge::Open(const BRepPrim_Direction d1)
{
  BRepPrim_Wedge_Check(VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
  myInfinite[BRepPrim_Wedge_NumDir1(d1)] = true;
}

//=================================================================================================

void BRepPrim_GWedge::Close(const BRepPrim_Direction d1)
{
  BRepPrim_Wedge_Check(VerticesBuilt, EdgesBuilt, WiresBuilt, FacesBuilt);
  myInfinite[BRepPrim_Wedge_NumDir1(d1)] = false;
}

//=======================================================================
// function : IsInfinite
// purpose  : true if it is open in the given direction
//=======================================================================

bool BRepPrim_GWedge::IsInfinite(const BRepPrim_Direction d1) const
{
  return myInfinite[BRepPrim_Wedge_NumDir1(d1)];
}

//=================================================================================================

const TopoDS_Shell& BRepPrim_GWedge::Shell()
{
  if (IsDegeneratedShape())
  {
    throw Standard_DomainError();
  }

  if (!ShellBuilt)
  {
    myBuilder.MakeShell(myShell);

    if (HasFace(BRepPrim_XMin))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_XMin));
    }
    if (HasFace(BRepPrim_XMax))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_XMax));
    }
    if (HasFace(BRepPrim_YMin))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_YMin));
    }
    if (HasFace(BRepPrim_YMax))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_YMax));
    }
    if (HasFace(BRepPrim_ZMin))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_ZMin));
    }
    if (HasFace(BRepPrim_ZMax))
    {
      myBuilder.AddShellFace(myShell, Face(BRepPrim_ZMax));
    }

    myShell.Closed(BRep_Tool::IsClosed(myShell));
    myBuilder.CompleteShell(myShell);
    ShellBuilt = true;
  }
  return myShell;
}

//=======================================================================
// function : HasFace
// purpose  : true if the face exist in one direction
//=======================================================================

bool BRepPrim_GWedge::HasFace(const BRepPrim_Direction d1) const
{
  bool state = !myInfinite[BRepPrim_Wedge_NumDir1(d1)];
  if (d1 == BRepPrim_YMax)
  {
    state = state && (Z2Max != Z2Min) && (X2Max != X2Min);
  }
  return state;
}

//=================================================================================================

gp_Pln BRepPrim_GWedge::Plane(const BRepPrim_Direction d1)
{

  int i = BRepPrim_Wedge_NumDir1(d1);

  gp_Dir D;
  gp_Vec VX = myAxes.XDirection();
  gp_Vec VY = myAxes.YDirection();
  gp_Vec VZ = myAxes.Direction();

  switch (i / 2)
  {

    case 0:
      D = myAxes.XDirection();
      break;

    case 1:
      D = myAxes.YDirection();
      break;

    case 2:
      D = myAxes.Direction();
      break;
  };
  double X = 0., Y = 0., Z = 0.;

  switch (i)
  {

    case 0:
      // XMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      if (X2Min != XMin)
      {
        D = gp_Dir((YMax - YMin) * VX + (XMin - X2Min) * VY);
      }
      break;

    case 1:
      // XMax
      X = XMax;
      Y = YMin;
      Z = ZMin;
      if (X2Max != XMax)
      {
        D = gp_Dir((YMax - YMin) * VX + (XMax - X2Max) * VY);
      }
      break;

    case 2:
      // YMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      break;

    case 3:
      // YMax
      X = XMin;
      Y = YMax;
      Z = ZMin;
      break;

    case 4:
      // ZMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      if (Z2Min != ZMin)
      {
        D = gp_Dir((YMax - YMin) * VZ + (ZMin - Z2Min) * VY);
      }
      break;

    case 5:
      // ZMax
      X = XMin;
      Y = YMin;
      Z = ZMax;
      if (Z2Max != ZMax)
      {
        D = gp_Dir((YMax - YMin) * VZ + (ZMax - Z2Max) * VY);
      }
      break;
  };

  gp_Pnt P = myAxes.Location();
  P.Translate(X * gp_Vec(myAxes.XDirection()));
  P.Translate(Y * gp_Vec(myAxes.YDirection()));
  P.Translate(Z * gp_Vec(myAxes.Direction()));
  gp_Pln plane(P, D);
  return plane;
}

//=================================================================================================

const TopoDS_Face& BRepPrim_GWedge::Face(const BRepPrim_Direction d1)
{

  int i = BRepPrim_Wedge_NumDir1(d1);

  if (!FacesBuilt[i])
  {
    gp_Pln P = Plane(d1);
    myBuilder.MakeFace(myFaces[i], P);
    if (HasWire(d1))
    {
      myBuilder.AddFaceWire(myFaces[i], Wire(d1));
    }
    if (i % 2 == 0)
    {
      myBuilder.ReverseFace(myFaces[i]);
    }

    // pcurves

    BRepPrim_Direction dd1 = BRepPrim_ZMin, dd2 = BRepPrim_YMax, dd3 = BRepPrim_ZMax,
                       dd4 = BRepPrim_YMin;

    switch (i / 2)
    {

      case 0:
        // XMin XMax
        dd1 = BRepPrim_ZMin;
        dd2 = BRepPrim_YMax;
        dd3 = BRepPrim_ZMax;
        dd4 = BRepPrim_YMin;
        break;

      case 1:
        // YMin YMax
        dd1 = BRepPrim_XMin;
        dd2 = BRepPrim_ZMax;
        dd3 = BRepPrim_XMax;
        dd4 = BRepPrim_ZMin;
        break;

      case 2:
        // ZMin ZMax
        dd1 = BRepPrim_YMin;
        dd2 = BRepPrim_XMax;
        dd3 = BRepPrim_YMax;
        dd4 = BRepPrim_XMin;
        break;
    };

    gp_Lin L;
    gp_Dir DX = P.XAxis().Direction();
    gp_Dir DY = P.YAxis().Direction();
    double U, V, DU, DV;
    if (HasEdge(d1, dd4))
    {
      L = Line(d1, dd4);
      ElSLib::Parameters(P, L.Location(), U, V);
      DU = L.Direction() * DX;
      DV = L.Direction() * DY;
      myBuilder.SetPCurve(myEdges[BRepPrim_Wedge_NumDir2(d1, dd4)],
                          myFaces[i],
                          gp_Lin2d(gp_Pnt2d(U, V), gp_Dir2d(DU, DV)));
    }
    if (HasEdge(d1, dd3))
    {
      L = Line(d1, dd3);
      ElSLib::Parameters(P, L.Location(), U, V);
      DU = L.Direction() * DX;
      DV = L.Direction() * DY;
      myBuilder.SetPCurve(myEdges[BRepPrim_Wedge_NumDir2(d1, dd3)],
                          myFaces[i],
                          gp_Lin2d(gp_Pnt2d(U, V), gp_Dir2d(DU, DV)));
    }

    if (HasEdge(d1, dd2))
    {
      L = Line(d1, dd2);
      ElSLib::Parameters(P, L.Location(), U, V);
      DU = L.Direction() * DX;
      DV = L.Direction() * DY;
      myBuilder.SetPCurve(myEdges[BRepPrim_Wedge_NumDir2(d1, dd2)],
                          myFaces[i],
                          gp_Lin2d(gp_Pnt2d(U, V), gp_Dir2d(DU, DV)));
    }

    if (HasEdge(d1, dd1))
    {
      L = Line(d1, dd1);
      ElSLib::Parameters(P, L.Location(), U, V);
      DU = L.Direction() * DX;
      DV = L.Direction() * DY;
      myBuilder.SetPCurve(myEdges[BRepPrim_Wedge_NumDir2(d1, dd1)],
                          myFaces[i],
                          gp_Lin2d(gp_Pnt2d(U, V), gp_Dir2d(DU, DV)));
    }

    myBuilder.CompleteFace(myFaces[i]);
    FacesBuilt[i] = true;
  }

  return myFaces[i];
}

//=================================================================================================

bool BRepPrim_GWedge::HasWire(const BRepPrim_Direction d1) const
{
  int i = BRepPrim_Wedge_NumDir1(d1);

  if (myInfinite[i])
  {
    return false;
  }
  BRepPrim_Direction dd1 = BRepPrim_XMin, dd2 = BRepPrim_YMax, dd3 = BRepPrim_XMax,
                     dd4 = BRepPrim_ZMin;

  switch (i / 2)
  {

    case 0:
      // XMin XMax
      dd1 = BRepPrim_ZMin;
      dd2 = BRepPrim_YMax;
      dd3 = BRepPrim_ZMax;
      dd4 = BRepPrim_YMin;
      break;

    case 1:
      // YMin YMax
      dd1 = BRepPrim_XMin;
      dd2 = BRepPrim_ZMax;
      dd3 = BRepPrim_XMax;
      dd4 = BRepPrim_ZMin;
      break;

    case 2:
      // ZMin ZMax
      dd1 = BRepPrim_YMin;
      dd2 = BRepPrim_XMax;
      dd3 = BRepPrim_YMax;
      dd4 = BRepPrim_XMin;
      break;
#ifndef OCCT_DEBUG
    default:
      break;
#endif
  };

  return HasEdge(d1, dd1) || HasEdge(d1, dd2) || HasEdge(d1, dd3) || HasEdge(d1, dd4);
}

//=================================================================================================

const TopoDS_Wire& BRepPrim_GWedge::Wire(const BRepPrim_Direction d1)
{
  int i = BRepPrim_Wedge_NumDir1(d1);

  BRepPrim_Direction dd1 = BRepPrim_XMin, dd2 = BRepPrim_YMax, dd3 = BRepPrim_XMax,
                     dd4 = BRepPrim_ZMin;

  if (!WiresBuilt[i])
  {

    switch (i / 2)
    {

      case 0:
        // XMin XMax
        dd1 = BRepPrim_ZMin;
        dd2 = BRepPrim_YMax;
        dd3 = BRepPrim_ZMax;
        dd4 = BRepPrim_YMin;
        break;

      case 1:
        // YMin YMax
        dd1 = BRepPrim_XMin;
        dd2 = BRepPrim_ZMax;
        dd3 = BRepPrim_XMax;
        dd4 = BRepPrim_ZMin;
        break;

      case 2:
        // ZMin ZMax
        dd1 = BRepPrim_YMin;
        dd2 = BRepPrim_XMax;
        dd3 = BRepPrim_YMax;
        dd4 = BRepPrim_XMin;
        break;
      default:
        break;
    };

    myBuilder.MakeWire(myWires[i]);

    if (HasEdge(d1, dd4))
    {
      myBuilder.AddWireEdge(myWires[i], Edge(d1, dd4), false);
    }
    if (HasEdge(d1, dd3))
    {
      myBuilder.AddWireEdge(myWires[i], Edge(d1, dd3), false);
    }
    if (HasEdge(d1, dd2))
    {
      myBuilder.AddWireEdge(myWires[i], Edge(d1, dd2), true);
    }
    if (HasEdge(d1, dd1))
    {
      myBuilder.AddWireEdge(myWires[i], Edge(d1, dd1), true);
    }

    myBuilder.CompleteWire(myWires[i]);
    WiresBuilt[i] = true;
  }

  return myWires[i];
}

//=================================================================================================

bool BRepPrim_GWedge::HasEdge(const BRepPrim_Direction d1, const BRepPrim_Direction d2) const
{
  bool state = !(myInfinite[BRepPrim_Wedge_NumDir1(d1)] || myInfinite[BRepPrim_Wedge_NumDir1(d2)]);
  int  i     = BRepPrim_Wedge_NumDir2(d1, d2);
  if (i == 6 || i == 7)
  {
    state = state && (X2Max != X2Min);
  }
  else if (i == 1 || i == 3)
  {
    state = state && (Z2Max != Z2Min);
  }
  return state;
}

//=================================================================================================

gp_Lin BRepPrim_GWedge::Line(const BRepPrim_Direction d1, const BRepPrim_Direction d2)
{
  if (!HasEdge(d1, d2))
  {
    throw Standard_DomainError();
  }

  int i = BRepPrim_Wedge_NumDir2(d1, d2);

  double X = 0., Y = 0., Z = 0.;

  gp_Dir D;
  gp_Vec VX = myAxes.XDirection();
  gp_Vec VY = myAxes.YDirection();
  gp_Vec VZ = myAxes.Direction();

  switch (i / 4)
  {

    case 0:
      D = myAxes.Direction();
      break;

    case 1:
      D = myAxes.XDirection();
      break;

    case 2:
      D = myAxes.YDirection();
      break;
  };

  switch (i)
  {

    case 0:
      // XMin YMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      break;

    case 1:
      // XMin YMax
      X = X2Min;
      Y = YMax;
      Z = Z2Min;
      break;

    case 2:
      // XMax YMin
      X = XMax;
      Y = YMin;
      Z = ZMin;
      break;

    case 3:
      // XMax YMax
      X = X2Max;
      Y = YMax;
      Z = Z2Min;
      break;

    case 4:
      // YMin ZMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      break;

    case 5:
      // YMin ZMax
      X = XMin;
      Y = YMin;
      Z = ZMax;
      break;

    case 6:
      // YMax ZMin
      X = X2Min;
      Y = YMax;
      Z = Z2Min;
      break;

    case 7:
      // YMax ZMax
      X = X2Min;
      Y = YMax;
      Z = Z2Max;
      break;

    case 8:
      // ZMin XMin
      X = XMin;
      Y = YMin;
      Z = ZMin;
      if ((XMin != X2Min) || (ZMin != Z2Min))
      {
        D = gp_Vec((X2Min - XMin) * VX + (YMax - YMin) * VY + (Z2Min - ZMin) * VZ);
      }
      break;

    case 9:
      // ZMax XMin
      X = XMin;
      Y = YMin;
      Z = ZMax;
      if ((XMin != X2Min) || (ZMax != Z2Max))
      {
        D = gp_Vec((X2Min - XMin) * VX + (YMax - YMin) * VY + (Z2Max - ZMax) * VZ);
      }
      break;

    case 10:
      // ZMin XMax
      X = XMax;
      Y = YMin;
      Z = ZMin;
      if ((XMax != X2Max) || (ZMin != Z2Min))
      {
        D = gp_Vec((X2Max - XMax) * VX + (YMax - YMin) * VY + (Z2Min - ZMin) * VZ);
      }
      break;

    case 11:
      // ZMax XMax
      X = XMax;
      Y = YMin;
      Z = ZMax;
      if ((XMax != X2Max) || (ZMax != Z2Max))
      {
        D = gp_Vec((X2Max - XMax) * VX + (YMax - YMin) * VY + (Z2Max - ZMax) * VZ);
      }
      break;
  }

  gp_Pnt P = myAxes.Location();
  P.Translate(X * gp_Vec(myAxes.XDirection()));
  P.Translate(Y * gp_Vec(myAxes.YDirection()));
  P.Translate(Z * gp_Vec(myAxes.Direction()));
  return gp_Lin(gp_Ax1(P, D));
}

//=================================================================================================

const TopoDS_Edge& BRepPrim_GWedge::Edge(const BRepPrim_Direction d1, const BRepPrim_Direction d2)
{
  if (!HasEdge(d1, d2))
  {
    throw Standard_DomainError();
  }

  int i = BRepPrim_Wedge_NumDir2(d1, d2);

  if (!EdgesBuilt[i])
  {

    BRepPrim_Direction dd1 = BRepPrim_XMin, dd2 = BRepPrim_XMax;

    switch (i / 4)
    {

      case 0:
        dd1 = BRepPrim_ZMin;
        dd2 = BRepPrim_ZMax;
        break;

      case 1:
        dd1 = BRepPrim_XMin;
        dd2 = BRepPrim_XMax;
        break;

      case 2:
        dd1 = BRepPrim_YMin;
        dd2 = BRepPrim_YMax;
        break;

      default:
        break;
    };

    gp_Lin L = Line(d1, d2);
    myBuilder.MakeEdge(myEdges[i], L);

    if (HasVertex(d1, d2, dd2))
    {
      myBuilder.AddEdgeVertex(myEdges[i],
                              Vertex(d1, d2, dd2),
                              ElCLib::Parameter(L, Point(d1, d2, dd2)),
                              false);
    }
    if (HasVertex(d1, d2, dd1))
    {
      myBuilder.AddEdgeVertex(myEdges[i],
                              Vertex(d1, d2, dd1),
                              ElCLib::Parameter(L, Point(d1, d2, dd1)),
                              true);
    }

    if (Z2Max == Z2Min)
    {
      if (i == 6)
      {
        myEdges[7]    = myEdges[6];
        EdgesBuilt[7] = true;
      }
      else if (i == 7)
      {
        myEdges[6]    = myEdges[7];
        EdgesBuilt[6] = true;
      }
    }
    if (X2Max == X2Min)
    {
      if (i == 1)
      {
        myEdges[3]    = myEdges[1];
        EdgesBuilt[3] = true;
      }
      else if (i == 3)
      {
        myEdges[1]    = myEdges[3];
        EdgesBuilt[1] = true;
      }
    }

    myBuilder.CompleteEdge(myEdges[i]);
    EdgesBuilt[i] = true;
  }

  return myEdges[i];
}

//=================================================================================================

bool BRepPrim_GWedge::HasVertex(const BRepPrim_Direction d1,
                                const BRepPrim_Direction d2,
                                const BRepPrim_Direction d3) const
{
  return !(myInfinite[BRepPrim_Wedge_NumDir1(d1)] || myInfinite[BRepPrim_Wedge_NumDir1(d2)]
           || myInfinite[BRepPrim_Wedge_NumDir1(d3)]);
}

//=================================================================================================

gp_Pnt BRepPrim_GWedge::Point(const BRepPrim_Direction d1,
                              const BRepPrim_Direction d2,
                              const BRepPrim_Direction d3)
{
  if (!HasVertex(d1, d2, d3))
  {
    throw Standard_DomainError();
  }

  int i = BRepPrim_Wedge_NumDir3(d1, d2, d3);

  double X = 0., Y = 0., Z = 0.;

  switch (i)
  {

    case 0:
      X = XMin;
      Y = YMin;
      Z = ZMin;
      break;

    case 1:
      X = XMin;
      Y = YMin;
      Z = ZMax;
      break;

    case 2:
      X = X2Min;
      Y = YMax;
      Z = Z2Min;
      break;

    case 3:
      X = X2Min;
      Y = YMax;
      Z = Z2Max;
      break;

    case 4:
      X = XMax;
      Y = YMin;
      Z = ZMin;
      break;

    case 5:
      X = XMax;
      Y = YMin;
      Z = ZMax;
      break;

    case 6:
      X = X2Max;
      Y = YMax;
      Z = Z2Min;
      break;

    case 7:
      X = X2Max;
      Y = YMax;
      Z = Z2Max;
      break;
  };

  gp_Pnt P = myAxes.Location();
  P.Translate(X * gp_Vec(myAxes.XDirection()));
  P.Translate(Y * gp_Vec(myAxes.YDirection()));
  P.Translate(Z * gp_Vec(myAxes.Direction()));
  return P;
}

//=================================================================================================

const TopoDS_Vertex& BRepPrim_GWedge::Vertex(const BRepPrim_Direction d1,
                                             const BRepPrim_Direction d2,
                                             const BRepPrim_Direction d3)
{
  if (!HasVertex(d1, d2, d3))
  {
    throw Standard_DomainError();
  }

  int i = BRepPrim_Wedge_NumDir3(d1, d2, d3);

  if (!VerticesBuilt[i])
  {

    myBuilder.MakeVertex(myVertices[i], Point(d1, d2, d3));

    if (Z2Max == Z2Min)
    {
      if (i == 2 || i == 6)
      {
        myVertices[3]    = myVertices[2];
        myVertices[7]    = myVertices[6];
        VerticesBuilt[3] = true;
        VerticesBuilt[7] = true;
      }
      else if (i == 3 || i == 7)
      {
        myVertices[2]    = myVertices[3];
        myVertices[6]    = myVertices[7];
        VerticesBuilt[2] = true;
        VerticesBuilt[6] = true;
      }
    }
    if (X2Max == X2Min)
    {
      if (i == 2 || i == 3)
      {
        myVertices[6]    = myVertices[2];
        myVertices[7]    = myVertices[3];
        VerticesBuilt[6] = true;
        VerticesBuilt[7] = true;
      }
      else if (i == 6 || i == 7)
      {
        myVertices[2]    = myVertices[6];
        myVertices[3]    = myVertices[7];
        VerticesBuilt[2] = true;
        VerticesBuilt[3] = true;
      }
    }

    VerticesBuilt[i] = true;
  }

  return myVertices[i];
}

//=================================================================================================

bool BRepPrim_GWedge::IsDegeneratedShape()
{
  return (XMax - XMin <= Precision::Confusion()) || (YMax - YMin <= Precision::Confusion())
         || (ZMax - ZMin <= Precision::Confusion()) || (Z2Max - Z2Min < 0) || (X2Max - X2Min < 0);
}