//----------------------------------------------------------------------------
//  EgalTech 2015-2015
//----------------------------------------------------------------------------
// File : StmStandard.cpp    Data : 31.03.15       Versione : 1.6c7
// Contenuto : Implementazione di funzioni per creazione di superfici Stm
//             standard : Box, Pyramid, Cylinder, Sphere, Cone.
//
//
// Modifiche : 31.03.15 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "CurveArc.h"
#include "SurfTriMesh.h"
#include "/EgtDev/Include/EGkStmStandard.h"
#include "/EgtDev/Include/EGkStmFromCurves.h"
#include "/EgtDev/Include/EGkPolygon3d.h"
#include "/EgtDev/Include/EgtPointerOwner.h"

using namespace std ;

//-------------------------------------------------------------------------------
static SurfTriMesh*
GetStandardSurfTriMeshBox( double dDimX, double dDimY, double dHeight)
{
  // creo oggetto vuoto
   PtrOwner<SurfTriMesh> pSTM( CreateBasicSurfTriMesh()) ;
   if ( IsNull( pSTM))
      return nullptr ;
  // assegno i vertici
   double dBotZ = 0, dTopZ = dHeight ;
   if ( dBotZ > dTopZ)
      swap( dBotZ, dTopZ) ;
   if ( pSTM->AddVertex( Point3d( 0, 0, dBotZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( 0, 0, dTopZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( dDimX, 0, dBotZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( dDimX, 0, dTopZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( dDimX, dDimY, dBotZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( dDimX, dDimY, dTopZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( 0, dDimY, dBotZ)) == SVT_NULL  ||
        pSTM->AddVertex( Point3d( 0, dDimY, dTopZ)) == SVT_NULL)
      return nullptr ;
  // definisco i triangoli
   int aVertId[12][3]{{ 1, 0, 2}, { 1, 2, 3},
                      { 3, 2, 4}, { 3, 4, 5},
                      { 5, 4, 6}, { 5, 6, 7},
                      { 7, 6, 0}, { 7, 0, 1},
                      { 0, 4, 2}, { 6, 4, 0},
                      { 1, 3, 5}, { 7, 1, 5}} ;
   for ( int i = 0 ; i < 12 ; ++ i) {
      if ( pSTM->AddTriangle( aVertId[i]) == SVT_NULL)
         return nullptr ;
   }
  // sistemo la topologia
   if ( ! pSTM->AdjustTopology())
      return nullptr ;
  // restituisco la superficie
   return Release( pSTM) ;
}
//-------------------------------------------------------------------------------
static SurfTriMesh*
GetRegularSurfTriMeshBox( double dDimX, double dDimY, double dHeight)
{
  // i triangoli devono essere quasi equilateri pertanto calcolo come dividere le varie parti
   double dMaxStep = INFINITO ;
   double dMin1 = min( dDimX, dDimY) ;
   double dMin2 = min( max( dDimX, dDimY), abs( dHeight)) ;
   dMaxStep = min( max( dMin1, dMin2), 2 * min( dMin1, dMin2)) ;
   dMaxStep = max( dMaxStep, 1.) ;
   int nStepX = max( int( dDimX / dMaxStep + 0.9), 1) ;
   double dStepX = dDimX / nStepX ;
   int nStepY = max( int( dDimY / dMaxStep + 0.9), 1) ;
   double dStepY = dDimY / nStepY ;
   int nStepZ = max( int( abs( dHeight) / dMaxStep + 0.9), 1) ;
   double dStepZ = dHeight / nStepZ ;
  // creo la polilinea del contorno della base
   PolyLine PL1 ;
   int nU1 = 0 ;
   PL1.AddUPoint( nU1, ORIG) ;
   for ( int i = 1 ; i <= nStepX ; ++i)
      PL1.AddUPoint( ++ nU1, Point3d( i * dStepX, 0, 0)) ;
   for ( int j = 1 ; j <= nStepY ; ++j)
      PL1.AddUPoint( ++ nU1, Point3d( dDimX, j * dStepY, 0)) ;
   for ( int i = 1 ; i <= nStepX ; ++i)
      PL1.AddUPoint( ++ nU1, Point3d( dDimX - i * dStepX, dDimY, 0)) ;
   for ( int j = 1 ; j <= nStepY ; ++j)
      PL1.AddUPoint( ++ nU1, Point3d( 0, dDimY - j * dStepY, 0)) ;
   if ( dHeight < 0)
      PL1.Invert() ;
  // vettore altezza (estrusione)
   Vector3d vtExtr1( 0, 0, dStepZ) ;
  // creo e unisco le superfici trimesh laterali
   PtrOwner<SurfTriMesh> pSTM1 ;
   for ( int k = 0 ; k < nStepZ ; ++ k) {
      SurfTriMesh STMz ;
      if ( ! STMz.CreateByExtrusion( PL1, vtExtr1))
         return nullptr ;
      STMz.Translate( Vector3d( 0, 0, k * dStepZ)) ;
      if ( IsNull( pSTM1))
         pSTM1.Set( STMz.Clone()) ;
      else if ( ! pSTM1->DoSewing( STMz))
         return nullptr ;
   }
  // creo la polilinea del lato sinistro della superficie inferiore
   PolyLine PL2 ;
   int nU2 = 0 ;
   PL2.AddUPoint( nU2, ORIG) ;
   for ( int j = 1 ; j <= nStepY ; ++j)
      PL2.AddUPoint( ++ nU2, Point3d( 0, j * dStepY, 0)) ;
  // vettore estrusione
   Vector3d vtExtr2( dStepX, 0, 0) ;
  // creo e unisco le superfici trimesh inferiori
   SurfTriMesh STM2 ;
   for ( int i = 0 ; i < nStepX ; ++ i) {
      SurfTriMesh STMx ;
      if ( ! STMx.CreateByExtrusion( PL2, vtExtr2))
         return nullptr ;
      STMx.Translate( Vector3d( i * dStepX, 0, 0)) ;
      if ( STM2.IsEmpty())
         STM2 = STMx ;
      else if ( ! STM2.DoSewing( STMx))
         return nullptr ;
   }
  // la copio
   SurfTriMesh STM3 = STM2 ;
  // inverto e traslo la superficie superiore
   STM3.Invert() ;
   STM3.Translate( Vector3d( 0, 0, dHeight)) ;
  // le unisco alla superficie del fianco
   if ( ! pSTM1->DoSewing( STM2)  ||  ! pSTM1->DoSewing( STM3))
      return nullptr ;
  // restituisco la superficie
   return Release( pSTM1) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshBox( double dDimX, double dDimY, double dHeight, bool bRegular)
{
  // le dimensioni devono essere significative
   if ( dDimX < EPS_SMALL  ||  dDimY < EPS_SMALL  ||  abs( dHeight) < EPS_SMALL)
      return nullptr ;
  // se trimesh standard
   if ( ! bRegular)
      return GetStandardSurfTriMeshBox( dDimX, dDimY, dHeight) ;
  // altrimenti regolarizzata
   else
      return GetRegularSurfTriMeshBox( dDimX, dDimY, dHeight) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshPyramid( double dDimX, double dDimY, double dHeight)
{
  // le dimensioni devono essere significative
   if ( dDimX < EPS_SMALL  ||  dDimY < EPS_SMALL  ||  abs( dHeight) < EPS_SMALL)
      return nullptr ;
  // creo la polilinea del contorno della base
   PolyLine PL ;
   PL.AddUPoint( 0, ORIG) ;
   PL.AddUPoint( 1, Point3d( dDimX, 0, 0)) ;
   PL.AddUPoint( 2, Point3d( dDimX, dDimY, 0)) ;
   PL.AddUPoint( 3, Point3d( 0, dDimY, 0)) ;
   PL.AddUPoint( 4, ORIG) ;
   if ( dHeight < 0)
      PL.Invert() ;
  // punto di vertice
   Point3d ptTip( 0.5 * dDimX, 0.5 * dDimY, dHeight) ;
  // creo e setto la superficie trimesh laterale
   PtrOwner<SurfTriMesh> pSTM( CreateBasicSurfTriMesh()) ;
   if ( IsNull( pSTM)  ||  ! pSTM->CreateByPointCurve( ptTip, PL))
      return nullptr ;
  // creo la superficie di base e ne inverto la normale
   SurfTriMesh STM1 ;
   if ( ! STM1.CreateByFlatContour( PL))
      return nullptr ;
   STM1.Invert() ;
  // la unisco alla superficie del fianco
   if ( ! pSTM->DoSewing( STM1))
      return nullptr ;
  // restituisco la superficie
   return Release( pSTM) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshCylinder( double dRadius, double dHeight, double dLinTol)
{
  // le dimensioni devono essere significative
   if ( dRadius < EPS_SMALL  ||  abs( dHeight) < EPS_SMALL)
      return nullptr ;
  // creo la circonferenza di base
   CurveArc cArc ;
   cArc.Set( ORIG, Z_AX, dRadius) ;
  // vettore altezza (estrusione)
   Vector3d vtExtr( 0, 0, dHeight) ;
  // creo il cilindro
   return GetSurfTriMeshByExtrusion( &cArc, vtExtr, true, dLinTol) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshCone( double dRadius, double dHeight, double dLinTol)
{
  // le dimensioni devono essere significative
   if ( dRadius < EPS_SMALL  ||  abs( dHeight) < EPS_SMALL)
      return nullptr ;
  // creo la circonferenza di base
   CurveArc cArc ;
   cArc.Set( ORIG, Z_AX, dRadius) ;
   if ( dHeight < 0)
      cArc.Invert() ;
  // punto di vertice
   Point3d ptTip( 0, 0, dHeight) ;
  // creo la superficie laterale del cono
   PtrOwner<ISurfTriMesh> pSTM( GetSurfTriMeshRuled( ptTip, &cArc, dLinTol)) ;
   if ( IsNull( pSTM))
      return nullptr ;
  // creo la superficie di base e la inverto
   PtrOwner<ISurfTriMesh> pSTM1( GetSurfTriMeshByFlatContour( &cArc, dLinTol)) ;
   if ( IsNull( pSTM1))
      return nullptr ;
   pSTM1->Invert() ;
  // la unisco alla superficie del fianco
   if ( ! pSTM->DoSewing( *pSTM1))
      return nullptr ;
  // restituisco la superficie
   return Release( pSTM) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshSphere( double dRadius, double dLinTol)
{
  // le dimensioni devono essere significative
   if ( dRadius < EPS_SMALL)
      return nullptr ;
  // creo la semicirconferenza di riferimento
   CurveArc cArc ;
   cArc.Set( ORIG, Y_AX, dRadius, Z_AX, ANG_STRAIGHT, 0) ;
  // creo la sfera
   return GetSurfTriMeshByRevolve( &cArc, ORIG, Z_AX, true, dLinTol) ;
}

//-------------------------------------------------------------------------------
ISurfTriMesh*
GetSurfTriMeshPlaneInBox( const Plane3d& plPlane, const BBox3d& b3Box, bool bOnEq, bool bOnCt)
{
 // verifico la definizione del piano
  if ( ! plPlane.IsValid())
     return nullptr ;
 // creo il poligono corrispondente alla parte di piano limitata dal box
  Polygon3d Polyg ;
  if ( ! Polyg.FromPlaneTrimmedWithBox( plPlane, b3Box.GetMin(), b3Box.GetMax(), bOnEq, bOnCt))
     return nullptr ;
  // creo la trimesh con questo contorno
   PtrOwner<SurfTriMesh> pStm( CreateBasicSurfTriMesh()) ;
   if ( IsNull( pStm)  ||  ! pStm->CreateByFlatContour( Polyg.GetPolyLine()))
      return nullptr ;
  // restituisco la superficie
   return Release( pStm) ;
}