EgtGeomKernel/RemoveCurveDefects.cpp

//----------------------------------------------------------------------------
//  EgalTech 2017-2022
//----------------------------------------------------------------------------
// File : RemoveCurveDefects.cpp     Data : 28.11.22      Versione : 2.4k6
// Contenuto : Implementazione rimozione spikes di curva.
//
//
//
// Modifiche : 02.10.17 DS Creazione modulo.
//
//
//----------------------------------------------------------------------------

//--------------------------- Include ----------------------------------------
#include "stdafx.h"
#include "GeoConst.h"
#include "CurveComposite.h"
#include "DistPointLine.h"
#include "RemoveCurveDefects.h"
#include "/EgtDev/Include/EGkDistPointCurve.h"
#include <algorithm>

using namespace std ;

//----------------------------------------------------------------------------
bool
RemoveCurveSpikes( ICurveComposite* pCurve, double dLinTol)
{
  // verifico validità curva
   if ( pCurve == nullptr)
      return false ;
  // verifico e sistemo tolleranza lineare
   dLinTol = max( dLinTol, EPS_SMALL) ;
  // recupero il numero di curve semplici componenti la composta
   int nCrvCount = pCurve->GetCurveCount() ;
   if ( nCrvCount < 2  ||  ( nCrvCount < 3  &&  pCurve->IsClosed()))
      return true ;
  // ciclo sulle curve elementari della composita
   int nStart = pCurve->IsClosed() ? 0 : 1 ;
   for ( int i = nStart ; i < nCrvCount ; ++ i) {
     // recupero due curve consecutive
      const ICurve* pPrevCrv = pCurve->GetCurve( ( i > 0 ? i - 1 : nCrvCount - 1)) ;
      const ICurve* pNextCrv = pCurve->GetCurve( i) ;
     // se sono entrambe rette
      if ( pPrevCrv->GetType() == CRV_LINE  &&  pNextCrv->GetType() == CRV_LINE) {
        // recupero i punti estremi
         Point3d ptStart ; pPrevCrv->GetStartPoint( ptStart) ;
         Point3d ptMid ; pPrevCrv->GetEndPoint( ptMid) ;
         Point3d ptEnd ; pNextCrv->GetEndPoint( ptEnd) ;
        // recupero le direzioni negli estremi
         Vector3d vtPrev ; pPrevCrv->GetStartDir( vtPrev) ;
         Vector3d vtNext ; pNextCrv->GetStartDir( vtNext) ;
        // verifico se spike
         double dPrevDist, dNextDist ;
         if ( vtPrev * vtNext < cos( 175 * DEGTORAD)  &&  
              (( DistPointLine( ptStart, ptMid, ptEnd).GetDist( dPrevDist)  &&  dPrevDist < dLinTol)  ||
               ( DistPointLine( ptEnd, ptStart, ptMid).GetDist( dNextDist)  &&  dNextDist < dLinTol))) {
           // se spike ha base abbastanza larga, basta togliere uno dei due lati
            if ( SqDist( ptStart, ptEnd) > SQ_EPS_SMALL) {
               pCurve->RemoveJoint( i) ;
               -- nCrvCount ;
               -- i ;
            }
           // altrimenti bisogna togliere entrambi
            else {
               pCurve->RemoveJoint( i - 1) ;
               pCurve->RemoveJoint( i) ;
               nCrvCount -= 2 ;
               i = max( i - 2, nStart - 1) ;
            }
         }
      }
     // !!! Aggiungere la gestione degli altri tipi di curve !!!
   }

   return true ;
}

//----------------------------------------------------------------------------
bool
RemoveCurveSmallZs( ICurveComposite* pCurve, double dLinTol)
{
  // verifico validità curva
   if ( pCurve == nullptr)
      return false ;
  // verifico e sistemo tolleranza lineare
   dLinTol = max( dLinTol, EPS_SMALL) ;
  // recupero il numero di curve semplici componenti la composta
   int nCrvCount = pCurve->GetCurveCount() ;
   if ( nCrvCount < 2  ||  ( nCrvCount < 3  &&  pCurve->IsClosed()))
      return true ;
  // ciclo sulle curve elementari della composita
   int nStart = pCurve->IsClosed() ? 0 : 1 ;
   int nEnd = pCurve->IsClosed() ? nCrvCount : nCrvCount - 1 ;
   for ( int i = nStart ; i < nEnd ; ++ i) {
     // recupero tre curve consecutive
      const ICurve* pPrevCrv = pCurve->GetCurve( ( i > 0 ? i - 1 : nCrvCount - 1)) ;
      const ICurve* pCurrCrv = pCurve->GetCurve( i) ;
      const ICurve* pNextCrv = pCurve->GetCurve( ( i < nCrvCount - 1 ? i + 1 : 0)) ;
     // se la curva corrente è una retta
      if ( pCurrCrv->GetType() == CRV_LINE) {
        // recupero tre punti notevoli della curva
         Point3d ptStart ; pCurrCrv->GetStartPoint( ptStart) ;
         Point3d ptMid ; pCurrCrv->GetMidPoint( ptMid) ;
         Point3d ptEnd ; pCurrCrv->GetEndPoint( ptEnd) ;
        // recupero le direzioni negli estremi
         Vector3d vtPrev ; pPrevCrv->GetEndDir( vtPrev) ;
         Vector3d vtNext ; pNextCrv->GetStartDir( vtNext) ;
        // verifico se Small Z
         double dDistS, dDistM1, dDistM2, dDistE ;
         if ( vtPrev * vtNext > cos( 30 * DEGTORAD)  &&  
              (( DistPointCurve( ptStart, *pNextCrv).GetDist( dDistS)  &&  dDistS < dLinTol)  &&
               ( DistPointCurve( ptMid, *pNextCrv).GetDist( dDistM1)  &&  dDistM1 < dLinTol)  &&
               ( DistPointCurve( ptMid, *pPrevCrv).GetDist( dDistM2)  &&  dDistM2 < dLinTol)  &&
               ( DistPointCurve( ptEnd, *pPrevCrv).GetDist( dDistE)  &&  dDistE < dLinTol))) {
           // rimuovo il segmento
            if ( pCurve->RemoveJoint( i)) {
               -- nCrvCount ;
               -- nEnd ;
               -- i ;
              // porto il nuovo estremo sul punto medio
               pCurve->ModifyJoint( i + 1, ptMid) ;
            }
           // altrimenti devo rimuovere anche il successivo
            else if ( pCurve->RemoveJoint( i + 1)  &&  pCurve->RemoveJoint( i)) {
               nCrvCount -= 2 ;
               nEnd -= 2 ;
               -- i ;
              // porto il nuovo estremo sul punto medio
               pCurve->ModifyJoint( i + 1, ptMid) ;
            }
         }
      }
   }

   return true ;
}