EgtGeomKernel 1.5e6 :

- aggiunto PointGrid3d (griglia hash per ricerca spaziale veloce di punti) - aggiunti Compacting e Sewing a SurfTriMesh - razionalizzazioni a GdbExecutor.
2014-05-18 09:28:31 +00:00
parent 7bcd0813f9
commit ea3099ae74
11 changed files with 731 additions and 234 deletions
@@ -0,0 +1,111 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2014-2014
+//----------------------------------------------------------------------------
+// File : PointGrid3d.cpp        Data : 15.05.14          Versione : 1.5e5
+// Contenuto : Implementazione della classe PointGrid3d.
+//             Indicizzazione spaziale di Point3d mediante hash grid.
+//
+//
+// Modifiche : 15.05.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "\EgtDev\Include\EGkPointGrid3d.h"
+#include <utility>
+
+using namespace std ;
+
+//----------------------------------------------------------------------------
+bool
+PointGrid3d::Init( int nBuckets, double dCellDim)
+{
+   m_dCellDim = dCellDim ;
+   m_MMap.rehash( nBuckets) ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+PointGrid3d::InsertPoint( const Point3d& ptP, int nId)
+{
+   int nKey = PointHash( Get1dCellNbr( ptP.x), Get1dCellNbr( ptP.y), Get1dCellNbr( ptP.z)) ;
+   m_MMap.insert( make_pair( nKey, make_pair( ptP, nId))) ;
+   return true ;
+}
+
+//----------------------------------------------------------------------------
+bool
+PointGrid3d::Find( const Point3d& ptTest, double dTol, INTVECTOR& vnIds)
+{
+  // ricavo gli indici sui tre assi degli estremi del box
+   int nXmin = Get1dCellNbr( ptTest.x - dTol) ;
+   int nXmax = Get1dCellNbr( ptTest.x + dTol) ;
+   int nYmin = Get1dCellNbr( ptTest.y - dTol) ;
+   int nYmax = Get1dCellNbr( ptTest.y + dTol) ;
+   int nZmin = Get1dCellNbr( ptTest.z - dTol) ;
+   int nZmax = Get1dCellNbr( ptTest.z + dTol) ;
+  // pulisco il risultato
+   vnIds.clear() ;
+  // ciclo su tutte le celle comprese tra gli estremi
+   for ( int i = nXmin ; i <= nXmax ; ++ i) {
+      for ( int j = nYmin ; j <= nYmax ; ++ j) {
+         for ( int k = nZmin ; k <= nZmax ; ++ k) {
+            pair<IPNTI_UMMAP::iterator, IPNTI_UMMAP::iterator> MMrange =
+                                  m_MMap.equal_range( PointHash( i, j, k)) ;
+            for ( ; MMrange.first != MMrange.second ; ++ MMrange.first) {
+               if ( SqDist( (*MMrange.first).second.first, ptTest) < ( dTol * dTol))
+                  vnIds.push_back( (*MMrange.first).second.second) ;
+            }
+         }
+      }
+   }
+
+   return ( vnIds.size() > 0) ;
+}
+
+//----------------------------------------------------------------------------
+bool
+PointGrid3d::Find( const Point3d& ptTest, double dTol, int& nId)
+{
+  // ricavo gli indici sui tre assi degli estremi del box
+   int nXmin = Get1dCellNbr( ptTest.x - dTol) ;
+   int nXmax = Get1dCellNbr( ptTest.x + dTol) ;
+   int nYmin = Get1dCellNbr( ptTest.y - dTol) ;
+   int nYmax = Get1dCellNbr( ptTest.y + dTol) ;
+   int nZmin = Get1dCellNbr( ptTest.z - dTol) ;
+   int nZmax = Get1dCellNbr( ptTest.z + dTol) ;
+  // ciclo su tutte le celle comprese tra gli estremi
+   for ( int i = nXmin ; i <= nXmax ; ++ i) {
+      for ( int j = nYmin ; j <= nYmax ; ++ j) {
+         for ( int k = nZmin ; k <= nZmax ; ++ k) {
+            pair<IPNTI_UMMAP::iterator, IPNTI_UMMAP::iterator> MMrange =
+                                  m_MMap.equal_range( PointHash( i, j, k)) ;
+            for ( ; MMrange.first != MMrange.second ; ++ MMrange.first) {
+               if ( SqDist( (*MMrange.first).second.first, ptTest) < ( dTol * dTol)) {
+                  nId = (*MMrange.first).second.second ;
+                  return true ;
+               }
+            }
+         }
+      }
+   }
+
+   return false ;
+}
+
+//----------------------------------------------------------------------------
+int
+PointGrid3d::Get1dCellNbr( double dCoord)
+{
+   return static_cast<int>( floor( dCoord / m_dCellDim)) ;
+}
+
+//----------------------------------------------------------------------------
+int
+PointGrid3d::PointHash( int nX, int nY, int nZ)
+{
+   return ( nX * 73856093 ^ nY * 19349663 ^ nZ * 83492791) ;
+}