EgtInterface/API_GdbModifyCurve.cpp

//----------------------------------------------------------------------------
//  EgalTech 2014-2014
//----------------------------------------------------------------------------
// File : API_ModifyCurve.cpp       Data : 03.10.14        Versione : 1.5i5
// Contenuto : Funzioni di modifica delle curve per API.
//
//
//
// Modifiche : 03.10.14 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "API.h"
#include "API_Macro.h"
#include "AuxTools.h"
#include "/EgtDev/Include/EInAPI.h"
#include "/EgtDev/Include/EInConst.h"
#include "/EgtDev/Include/EGkCurve.h"
#include "/EgtDev/Include/EGkCurveArc.h"
#include "/EgtDev/Include/EGkCurveBezier.h"
#include "/EgtDev/Include/EGkCurveComposite.h"
#include "/EgtDev/Include/EGkDistPointCurve.h"
#include "/EgtDev/Include/EGkExtTExt.h"
#include "/EgtDev/Include/EGkGdbIterator.h"
#include "/EgtDev/Include/EGkStringUtils3d.h"
#include "/EgtDev/Include/EgtPointerOwner.h"

using namespace std ;

//----------------------------------------------------------------------------
BOOL
__stdcall EgtInvertCurve( int nId)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
   bool bOk = true ;
  // eseguo inversione singola
   if ( nId != GDB_ID_SEL) {
     // recupero la curva e la inverto
      ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
      if ( pCurve != nullptr  &&  ! pCurve->Invert())
         bOk = false ;
   }
  // eseguo inversione dei selezionati
   else {
      int nI = pGeomDB->GetFirstSelectedObj() ;
      while ( nI != GDB_ID_NULL  &&  bOk) {
        // recupero la curva e la inverto
         ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nI)) ;
         if ( pCurve != nullptr  &&  ! pCurve->Invert())
            bOk = false ;
        // passo alla successiva
         nI = pGeomDB->GetNextSelectedObj() ;
      }
   }
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtInvertCurve(" + ( nId != GDB_ID_SEL ? ToString( nId): "GDB_ID_SEL") + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtOffsetCurve( int nId, double dDist, int nType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
  // eseguo l'offset
   bool bOk = ( pCurve != nullptr) && pCurve->SimpleOffset( dDist, nType) ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua ;
      if ( nType == ICurve::OFF_FILLET)
         sLua = "EgtOffsetCurve(" + ToString( nId) + "," +
                                    ToString( dDist) + ")" +
                " -- Ok=" + ToString( bOk) ;
      else
         sLua = "EgtOffsetCurve(" + ToString( nId) + "," +
                                    ToString( dDist) + "," +
                                    ( nType == ICurve::OFF_CHAMFER ? "'CHAMFER'" : "'EXTEND'") + ")" +
                " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk  ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveStartPoint( int nId, const double ptP[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
   bool bOk = true ;
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   bOk = bOk && ( pCurve != nullptr) ;
  // porto in locale il nuovo punto iniziale
   Point3d ptPL( ptP) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      bOk = bOk && pGeomDB->GetGlobFrame( nId, frLoc) ;
      if ( nRefType == RTY_GLOB)
         ptPL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptPL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // ne modifico il punto iniziale
   bOk = bOk && pCurve->ModifyStart( ptPL) ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtModifyCurveStartPoint(" + ToString( nId) + ",{" +
                                                  ToString( Point3d( ptP)) + "}," +
                                                  RefTypeToString( nRefType) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco il risultato
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveEndPoint( int nId, const double ptP[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
   bool bOk = true ;
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   bOk = bOk && ( pCurve != nullptr) ;
  // porto in locale il nuovo punto iniziale
   Point3d ptPL( ptP) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      bOk = bOk && pGeomDB->GetGlobFrame( nId, frLoc) ;
      if ( nRefType == RTY_GLOB)
         ptPL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptPL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // ne modifico il punto finale
   bOk = bOk && pCurve->ModifyEnd( ptPL) ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtModifyCurveEndPoint(" + ToString( nId) + ",{" +
                                                ToString( Point3d( ptP)) + "}," +
                                                RefTypeToString( nRefType) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco il risultato
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
static bool
ModifyOneCurveExtrusion( IGeomDB* pGeomDB, int nId, const Vector3d& vtExtr, int nRefType)
{
  // porto in locale il versore estrusione
   Vector3d vtExtrL( vtExtr) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      if ( ! pGeomDB->GetGroupGlobFrame( nId, frLoc) &&
           ! pGeomDB->GetGlobFrame( nId, frLoc))           
         return false ;
      if ( nRefType == RTY_GLOB)
         vtExtrL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         vtExtrL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // se gruppo, agisco sulle sole curve componenti
   if ( pGeomDB->GetGdbType( nId) == GDB_TY_GROUP) {
      PtrOwner<IGdbIterator> pIter( CreateGdbIterator( pGeomDB)) ;
      if ( IsNull( pIter))
         return false ;
      for ( bool bFound = pIter->GoToFirstInGroup( nId) ;
            bFound ;
            bFound = pIter->GoToNext()) {
        // recupero la curva e ne modifico il vettore estrusione
         ICurve* pCurve = GetCurve( pIter->GetGeoObj()) ;
         if ( pCurve != nullptr  &&  ! pCurve->SetExtrusion( vtExtrL))
            return false ;
      }
      return true ;
   }
  // se oggetto geometrico
   else {
     // recupero la curva
      ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
     // ne modifico il vettore estrusione
      return ( pCurve == nullptr  ||  pCurve->SetExtrusion( vtExtrL)) ;
   }
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveExtrusion( int nId, const double vtExtr[3], int nRefType)
{
   INTVECTOR vIds ;
   vIds.push_back( nId) ;
   return ( EgtModifyCurveExtrusion( vIds, vtExtr, nRefType) ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
bool
EgtModifyCurveExtrusion( INTVECTOR& vIds, const Vector3d& vtExtr, int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, false)
   bool bOk = true ;
  // se estrusione espressa in locale, verifico che tutte le curve siano nello stesso riferimento
   if ( nRefType == RTY_LOC)
      bOk = bOk && VerifySameFrame( pGeomDB, vIds) ;
  // ciclo sul vettore degli identificativi
   for ( size_t i = 0 ; i < vIds.size() && bOk ; ++ i) {
     // impostazione estrusione singola
      if ( vIds[i] != GDB_ID_SEL) {
         bOk = bOk && ModifyOneCurveExtrusion( pGeomDB, vIds[i], vtExtr, nRefType) ;
      }
     // impostazione estrusione dei selezionati
      else {
         int nI = pGeomDB->GetFirstSelectedObj() ;
         while ( nI != GDB_ID_NULL  &&  bOk) {
            if ( ! ModifyOneCurveExtrusion( pGeomDB, nI, vtExtr, nRefType))
               bOk = false ;
           // passo alla successiva
            nI = pGeomDB->GetNextSelectedObj() ;
         }
      }
   }
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sIds ;
      for ( size_t i = 0 ; i < vIds.size() ; ++ i) {
         if ( i > 0)
            sIds += "," ;
         sIds += ( vIds[i] != GDB_ID_SEL ? ToString( vIds[i]) : "GDB_ID_SEL") ;
      }
      string sLua = "EgtModifyCurveExtrusion({" + sIds + "},{" +
                                                  ToString( Vector3d( vtExtr)) + "}," +
                                                  RefTypeToString( nRefType) + ")" +
               " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return bOk ;
}

//----------------------------------------------------------------------------
static bool
ModifyOneCurveThickness( IGeomDB* pGeomDB, int nId, double dThick)
{
  // se gruppo, agisco sulle sole curve componenti
   if ( pGeomDB->GetGdbType( nId) == GDB_TY_GROUP) {
      PtrOwner<IGdbIterator> pIter( CreateGdbIterator( pGeomDB)) ;
      if ( IsNull( pIter))
         return false ;
      bool bOk = true ;
      for ( bool bFound = pIter->GoToFirstInGroup( nId) ;
            bFound ;
            bFound = pIter->GoToNext()) {
        // recupero la curva e ne modifico lo spessore
         ICurve* pCurve = GetCurve( pIter->GetGeoObj()) ;
         if (  pCurve != nullptr  &&  ! pCurve->SetThickness( dThick))
            bOk = false ;
      }
      return bOk ;
   }
  // se oggetto geometrico
   else {
     // recupero la curva
      ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
     // ne modifico lo spessore, se curva
      return ( pCurve == nullptr  ||  pCurve->SetThickness( dThick)) ;
   }
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveThickness( int nId, double dThick)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
   bool bOk = true ;
  // eseguo impostazione spessore singola
   if ( nId != GDB_ID_SEL) {
      bOk = ModifyOneCurveThickness( pGeomDB, nId, dThick) ;
   }
  // eseguo impostazione spessore dei selezionati
   else {
      int nI = pGeomDB->GetFirstSelectedObj() ;
      while ( nI != GDB_ID_NULL  &&  bOk) {
         if ( ! ModifyOneCurveThickness( pGeomDB, nI, dThick))
            bOk = false ;
        // passo alla successiva
         nI = pGeomDB->GetNextSelectedObj() ;
      }
   }
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtModifyCurveThickness(" + ( nId != GDB_ID_SEL ? ToString( nId) : "GDB_ID_SEL") + "," +
                                                 ToString( dThick) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimCurveStartAtLen( int nId, double dLen)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // taglio la curva all'inizio
   bool bOk = pCurve->TrimStartAtLen( dLen) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimCurveEndAtLen( int nId, double dLen)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // taglio la curva alla fine
   bool bOk = pCurve->TrimEndAtLen( dLen) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimCurveStartAtParam( int nId, double dPar)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // taglio la curva all'inizio
   bool bOk = pCurve->TrimStartAtParam( dPar) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimCurveEndAtParam( int nId, double dPar)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // taglio la curva alla fine
   bool bOk = pCurve->TrimEndAtParam( dPar) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimCurveStartEndAtParam( int nId, double dParS, double dParE)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // taglio la curva agli estremi
   bool bOk = pCurve->TrimStartEndAtParam( dParS, dParE) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtExtendCurveStartByLen( int nId, double dLen)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // estendo la curva all'inizio
   bool bOk = pCurve->ExtendStartByLen( dLen) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtExtendCurveEndByLen( int nId, double dLen)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   if ( pCurve == nullptr)
      return FALSE ;
  // estendo la curva alla fine
   bool bOk = pCurve->ExtendEndByLen( dLen) ;
   EgtSetModified() ;
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtTrimExtendCurveByLen( int nId, double dLen, const double ptNear[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, GDB_ID_NULL)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   bool bOk = ( pCurve != nullptr) ;
  // porto in locale il punto
   Point3d ptNearL( ptNear) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      bOk = bOk && pGeomDB->GetGlobFrame( nId, frLoc) ;
      if ( nRefType == RTY_GLOB)
         ptNearL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptNearL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // cerco l'estremo pi� vicino al punto passato
   Point3d ptStart, ptEnd ;
   if ( bOk  &&  pCurve->GetStartPoint( ptStart)  &&  pCurve->GetEndPoint( ptEnd)) {
      if ( SqDist( ptStart, ptNearL) < SqDist( ptEnd, ptNearL)) {
         if ( dLen < - EPS_SMALL)
            bOk = pCurve->TrimStartAtLen( - dLen) ;
         else if ( dLen > EPS_SMALL)
            bOk = pCurve->ExtendStartByLen( dLen) ;
      }
      else {
         if ( dLen < - EPS_SMALL) {
            double dCrvLen ;
            bOk = pCurve->GetLength( dCrvLen) && pCurve->TrimEndAtLen( dCrvLen + dLen) ;
         }
         else if ( dLen > EPS_SMALL)
            bOk = pCurve->ExtendEndByLen( dLen) ;
      }
   }
   else
      bOk = false ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtTrimExtendCurveByLen(" + ToString( nId) + "," +
                                                 ToString( dLen) + ",{" +
                                                 ToString( Point3d( ptNear)) + "}," +
                                                 RefTypeToString( nRefType) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}

//----------------------------------------------------------------------------
BOOL
__stdcall EgtSplitCurveAtPoint( int nId, double ptOn[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero la curva
   ICurve* pCurve = GetCurve( pGeomDB->GetGeoObj( nId)) ;
   bool bOk = ( pCurve != nullptr) ;
  // porto in locale il punto
   Point3d ptOnL( ptOn) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      bOk = bOk && pGeomDB->GetGlobFrame( nId, frLoc) ;
      if ( nRefType == RTY_GLOB)
         ptOnL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptOnL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // determino la posizione parametrica del punto sulla curva (con tolleranza)
   double dU = 0 ;
   if ( bOk) {
      DistPointCurve dstPC( ptOnL, *pCurve) ;
      int nFlag ;
      if ( ! dstPC.GetParamAtMinDistPoint( 0, dU, nFlag)  ||  nFlag != MDPCI_NORMAL)
         bOk = false ;
   }
  // verifico che il punto di taglio sia interno alla curva
   bool bIsInside = false ;
   if ( bOk) {
      Point3d ptStart ;
      Point3d ptEnd ;
      Point3d ptBreak ;
      if ( pCurve->GetStartPoint( ptStart)  &&
           pCurve->GetEndPoint( ptEnd) &&
           pCurve->GetPointD1D2( dU, ICurve::FROM_MINUS, ptBreak)) {
         bIsInside = ! AreSamePointApprox( ptBreak, ptStart) &&
                     ! AreSamePointApprox( ptBreak, ptEnd) ;
      }
   }
  // se il punto di taglio � interno, devo realmente tagliare
   if ( bIsInside) {
     // copio la curva
      int nCopyId = GDB_ID_NULL ;
      if ( bOk  && ( nCopyId = pGeomDB->Copy( nId, GDB_ID_NULL, nId, GDB_AFTER)) == GDB_ID_NULL)
         bOk = false ;
     // tengo la prima parte dell'originale e la seconda parte della copia
      bOk = bOk && pCurve->TrimEndAtParam( dU) ;
      bOk = bOk && ( EgtTrimCurveStartAtParam( nCopyId, dU) != FALSE) ;
   }
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtSplitCurveAtPoint(" + ToString( nId) + ",{" +
                                              ToString( Point3d( ptOn)) + "}," +
                                              RefTypeToString( nRefType) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveCircleCPN( int nId, const double ptOn[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero l'arco e i suoi dati
   ICurveArc* pArc = GetCurveArc( pGeomDB->GetGeoObj( nId)) ;
   if ( pArc == nullptr)
      return FALSE ;
   Point3d ptCen = pArc->GetCenter() ;
   Vector3d vtN = pArc->GetNormVersor() ;
   double dOldRad = pArc->GetRadius() ;
  // porto in locale il nuovo punto
   Point3d ptOnL( ptOn) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      if ( ! pGeomDB->GetGlobFrame( nId, frLoc))
         return FALSE ;
      if ( nRefType == RTY_GLOB)
         ptOnL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptOnL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // calcolo il nuovo raggio
   double dRad = (( Point3d( ptOnL) - ptCen) ^ vtN).Len() ;
  // imposto il nuovo raggio
   if ( pArc->Set( ptCen, vtN, dRad)) 
      return TRUE ;
  // in caso di errore, ripristino i vecchi dati
   else {
      pArc->Set( ptCen, vtN, dOldRad) ;
      return FALSE ;
   }
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveArcRadius( int nId, double dRad)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero l'arco e i suoi dati
   ICurveArc* pArc = GetCurveArc( pGeomDB->GetGeoObj( nId)) ;
   if ( pArc == nullptr)
      return FALSE ;
   double dOldRad = pArc->GetRadius() ;
  // imposto il nuovo raggio
   if ( pArc->ChangeRadius( dRad))
      return TRUE ;
  // in caso di errore, ripristino i vecchi dati
   else {
      pArc->ChangeRadius( dOldRad) ;
      return FALSE ;
   }
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveArcC2PN( int nId, const double ptEnd[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero l'arco e i suoi dati
   ICurveArc* pArc = GetCurveArc( pGeomDB->GetGeoObj( nId)) ;
   if ( pArc == nullptr)
      return FALSE ;
   Point3d ptCen = pArc->GetCenter() ;
   Vector3d vtN = pArc->GetNormVersor() ;
   Point3d ptStart, ptOldEnd ;
   if ( ! pArc->GetStartPoint( ptStart)  ||  ! pArc->GetEndPoint( ptOldEnd))
      return FALSE ;
  // porto in locale il nuovo punto finale
   Point3d ptEndL( ptEnd) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      if ( ! pGeomDB->GetGlobFrame( nId, frLoc))
         return FALSE ;
      if ( nRefType == RTY_GLOB)
         ptEndL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptEndL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // imposto il nuovo punto finale
   if ( pArc->SetC2PN( ptCen, ptStart, ptEndL, vtN))
      return TRUE ;
  // in caso di errore, ripristino i vecchi dati
   else {
      pArc->SetC2PN( ptCen, ptStart, ptOldEnd, vtN) ;
      return FALSE ;
   }
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtModifyCurveArc3P( int nId, const double ptMid[3], int nRefType)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
  // recupero l'arco e i suoi punti notevoli
   ICurveArc* pArc = GetCurveArc( pGeomDB->GetGeoObj( nId)) ;
   if ( pArc == nullptr)
      return FALSE ;
   Point3d ptStart, ptOldMid, ptEnd ;
   if ( ! pArc->GetStartPoint( ptStart)  ||  ! pArc->GetMidPoint( ptOldMid)  ||  ! pArc->GetEndPoint( ptEnd))
      return FALSE ;
  // porto in locale il nuovo punto medio
   Point3d ptMidL( ptMid) ;
   if ( nRefType != RTY_LOC) {
      Frame3d frLoc ;
      if ( ! pGeomDB->GetGlobFrame( nId, frLoc))
         return FALSE ;
      if ( nRefType == RTY_GLOB)
         ptMidL.ToLoc( frLoc) ;
      else /* RTY_GRID */
         ptMidL.LocToLoc( pGeomDB->GetGridFrame(), frLoc) ;
   }
  // imposto il nuovo punto medio
   if ( pArc->Set3P( ptStart, ptMidL, ptEnd))
      return TRUE ;
  // in caso di errore, ripristino i vecchi dati
   else {
      pArc->Set3P( ptStart, ptOldMid, ptEnd) ;
      return FALSE ;
   }
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtExplodeCurveCompo( int nId)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
   bool bOk = true ;
  // recupero la curva composita
   ICurveComposite* pCompo = GetCurveComposite( pGeomDB->GetGeoObj( nId)) ;
   if ( pCompo == nullptr)
      bOk = false ;
  // estraggo tutte le curve
   ICurve* pCrv ;
   while ( bOk  &&  ( pCrv = pCompo->RemoveFirstOrLastCurve( false)) != nullptr) {
     // inserisco la curva nello stesso gruppo e nello stesso posto del GeomDB
      int nCrvId = pGeomDB->InsertGeoObj( GDB_ID_NULL, nId, GDB_BEFORE, pCrv) ;
      if ( nCrvId == GDB_ID_NULL)
         bOk = false ;
     // copio gli attributi
      if ( ! pGeomDB->CopyAttributes( nId, nCrvId))
         bOk = false ;
   }
  // elimino la curva composita ormai vuota
   bOk = bOk && pGeomDB->Erase( nId) ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtExplodeCurveCompo(" + ToString( nId) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}

//-------------------------------------------------------------------------------
BOOL
__stdcall EgtExplodeCurveBezier( int nId, BOOL bArcsVsLines, double dLinTol)
{
   IGeomDB* pGeomDB = GetCurrGeomDB() ;
   VERIFY_GEOMDB( pGeomDB, FALSE)
   bool bOk = true ;
  // recupero la curva di Bezier
   ICurveBezier* pCBezier = GetCurveBezier( pGeomDB->GetGeoObj( nId)) ;
   if ( pCBezier == nullptr)
      bOk = false ;
  // eseguo l'approssimazione
   const double ANG_TOL_STD_DEG = 15 ;
   PtrOwner<ICurveComposite> pCC( CreateCurveComposite()) ;
   if ( ! IsNull( pCC)) {
      if ( bArcsVsLines) {       // con bi-archi
         PolyArc PA ;
         if ( ! pCBezier->ApproxWithArcs( dLinTol, ANG_TOL_STD_DEG, PA)  ||
              ! pCC->FromPolyArc( PA))
            bOk = false ;
      }
      else {                     // con linee
         PolyLine PL ;
         if ( ! pCBezier->ApproxWithLines( dLinTol, ANG_TOL_STD_DEG, PL)  ||
              ! pCC->FromPolyLine( PL))
            bOk = false ;
      }
   }
   else
      bOk = false ;
  // inserisco le curve elementari nel DB
   ICurve* pCrv ;
   while ( bOk  &&  ( pCrv = pCC->RemoveFirstOrLastCurve( false)) != nullptr) {
     // inserisco la curva nello stesso gruppo e nello stesso posto del GeomDB
      int nCrvId = pGeomDB->InsertGeoObj( GDB_ID_NULL, nId, GDB_BEFORE, pCrv) ;
      if ( nCrvId == GDB_ID_NULL)
         bOk = false ;
     // copio gli attributi
      if ( ! pGeomDB->CopyAttributes( nId, nCrvId))
         bOk = false ;
   }
  // elimino la curva di Bezier
   bOk = bOk && pGeomDB->Erase( nId) ;
   EgtSetModified() ;
  // se richiesto, salvo il comando Lua equivalente
   if ( IsCmdLog()) {
      string sLua = "EgtExplodeCurveBezier(" + ToString( nId) + "," +
                                               ( bArcsVsLines ? "true" : "false") + "," +
                                               ToString( dLinTol) + ")" +
                    " -- Ok=" + ToString( bOk) ;
      LOG_INFO( GetCmdLogger(), sLua.c_str()) ;
   }
  // restituisco risultato
   return ( bOk ? TRUE : FALSE) ;
}