//----------------------------------------------------------------------------
//  EgalTech 2014-2014
//----------------------------------------------------------------------------
// File : LUA_GeoSnap.cpp       Data : 02.10.14        Versione : 1.5i5
// Contenuto : Funzioni di snap ad oggetti del DB geometrico per LUA.
//
//
//
// Modifiche : 02.10.14 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "LUA.h"
#include "API.h"
#include "/EgtDev/Include/EInAPI.h"
#include "/EgtDev/Extern/Lua/Include/lua.hpp"

using namespace std ;


//----------------------------------------------------------------------------
static int
LuaStartPoint( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il punto iniziale dell'entità
   Point3d ptP ;
   if ( EgtStartPoint( nId, ptP.v))
      LuaSetReturn( L, ptP) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaEndPoint( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il punto finale dell'entità
   Point3d ptP ;
   if ( EgtEndPoint( nId, ptP.v))
      LuaSetReturn( L, ptP) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaMidPoint( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il punto centrale dell'entità
   Point3d ptP ;
   if ( EgtMidPoint( nId, ptP.v))
      LuaSetReturn( L, ptP) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaCenterPoint( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il punto centrale dell'entità
   Point3d ptP ;
   if ( EgtCenterPoint( nId, ptP.v))
      LuaSetReturn( L, ptP) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaAtParamPoint( lua_State* L)
{
  // 2 parametri : Id, U
   int nId ;
   LuaCheckParam( L, 1, nId)
   double dU ;
   LuaCheckParam( L, 2, dU)
   LuaClearStack( L) ;
  // recupero il punto in posizione parametrica U della curva
   Point3d ptP ;
   if ( EgtAtParamPoint( nId, dU, ptP.v))
      LuaSetReturn( L, ptP) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaStartVector( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il vettore tangente all'inizio della curva
   Vector3d vtV ;
   if ( EgtStartVector( nId, vtV.v))
      LuaSetReturn( L, vtV) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaEndVector( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il vettore tangente alla fine della curva
   Vector3d vtV ;
   if ( EgtEndVector( nId, vtV.v))
      LuaSetReturn( L, vtV) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaMidVector( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il vettore tangente nel punto medio della curva
   Vector3d vtV ;
   if ( EgtMidVector( nId, vtV.v))
      LuaSetReturn( L, vtV) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaAtParamVector( lua_State* L)
{
  // 2 o 3 parametri : Id, U [, sSide]
   int nId ;
   LuaCheckParam( L, 1, nId)
   double dU ;
   LuaCheckParam( L, 2, dU)
   int nSide = + 1 ;
   string sSide ;
   if ( LuaGetParam( L, 3, sSide)  &&  sSide == "-")
      nSide = - 1 ;
   LuaClearStack( L) ;
  // recupero il punto in posizione parametrica U della curva
   Vector3d vtV ;
   if ( EgtAtParamVector( nId, dU, nSide, vtV.v))
      LuaSetReturn( L, vtV) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//----------------------------------------------------------------------------
static int
LuaFrame( lua_State* L)
{
  // 1 parametro : Id
   int nId ;
   LuaCheckParam( L, 1, nId)
   LuaClearStack( L) ;
  // recupero il frame
   Frame3d frFrame ;
   if ( EgtFrame( nId, frFrame))
      LuaSetReturn( L, frFrame) ;
   else
      LuaSetReturn( L) ;
   return 1 ;
}

//-------------------------------------------------------------------------------
bool
LuaInstallGeoSnap( lua_State* L)
{
   try {
      lua_register( L, "EgtSP", LuaStartPoint) ;
      lua_register( L, "EgtEP", LuaEndPoint) ;
      lua_register( L, "EgtMP", LuaMidPoint) ;
      lua_register( L, "EgtCP", LuaCenterPoint) ;
      lua_register( L, "EgtUP", LuaAtParamPoint) ;
      lua_register( L, "EgtSV", LuaStartVector) ;
      lua_register( L, "EgtEV", LuaEndVector) ;
      lua_register( L, "EgtMV", LuaMidVector) ;
      lua_register( L, "EgtUV", LuaAtParamVector) ;
      lua_register( L, "EgtFR", LuaFrame) ;
   }
   catch ( ...) {
      return false ;
   }
   return true ;
}