EgtGeomKernel 1.5k5 :

- sviluppo linee tangenti e perpendicolari a curve.
2014-12-01 14:48:44 +00:00
parent 8e0616c889
commit 9347e52d18
13 changed files with 1173 additions and 120 deletions
@@ -0,0 +1,80 @@
+//----------------------------------------------------------------------------
+//  EgalTech 2013-2014
+//----------------------------------------------------------------------------
+// File : LinePntMinDistCurve.cpp       Data : 27.11.14       Versione : 1.5k5
+// Contenuto : Implementazione funzioni per calcolo rette di minima distanza da curve.
+//
+//
+//
+// Modifiche : 25.11.14 DS Creazione modulo.
+//
+//
+//----------------------------------------------------------------------------
+
+//--------------------------- Include ----------------------------------------
+#include "stdafx.h"
+#include "CurveLine.h"
+#include "/EgtDev/Include/EgkLinePntMinDistCurve.h"
+#include "/EgtDev/Include/EgkDistPointCurve.h"
+#include "/EgtDev/Include/EgtPointerOwner.h"
+
+using namespace std ;
+
+//----------------------------------------------------------------------------
+ICurveLine*
+GetLinePointMinDistCurve( const Point3d& ptP, const ICurve& cCrv, const Point3d& ptNear)
+{
+  // calcolo i punti a minima distanza
+   DistPointCurve dstPtCurve( ptP, cCrv) ;
+  // ciclo su questi punti per trovare il più vicino al desiderato
+   bool bFound = false ;
+   double dMinSqDist = INFINITO * INFINITO ;
+   Point3d ptFoot ;
+   MinDistPCInfo mdInfo ;
+   for ( int i = 0 ; dstPtCurve.GetMinDistInfo( i, mdInfo) ; ++ i) {
+     // verifico punto
+      double dSqDist = SqDist( mdInfo.ptQ, ptNear) ;
+      if ( dSqDist < dMinSqDist) {
+         bFound = true ;
+         dMinSqDist = dSqDist ;
+         ptFoot = mdInfo.ptQ ;
+      }
+   }
+  // verifico eventuali tratti continui
+   for ( int i = 0 ; dstPtCurve.GetMinDistInfo( i, mdInfo) ; ++ i) {
+      if ( mdInfo.nFlag == MDPCI_START_CONT) {
+         MinDistPCInfo mdInfo2 ;
+         if ( dstPtCurve.GetMinDistInfo( i+1, mdInfo2)  &&  mdInfo2.nFlag == MDPCI_END_CONT) {
+           // copio la curva e la limito al tratto continuo
+            PtrOwner<ICurve> pCrvLim( cCrv.Clone()) ;
+            if ( IsNull( pCrvLim)  ||
+                 ! pCrvLim->TrimStartEndAtParam( mdInfo.dPar, mdInfo2.dPar))
+               break ;
+           // trovo il punto del tratto continuo a minima distanza dal punto near
+            Point3d ptTest ;
+            int nFlag ;
+            DistPointCurve dstPtCurve2( ptNear, *pCrvLim) ;
+            if ( dstPtCurve2.GetMinDistPoint( 0, ptTest, nFlag)) {
+               double dSqDist = SqDist( ptTest, ptNear) ;
+               if ( dSqDist < dMinSqDist) {
+                  bFound = true ;
+                  dMinSqDist = dSqDist ;
+                  ptFoot = ptTest ;
+               }
+            }
+         }
+      }
+   }
+
+   if ( ! bFound)
+      return nullptr ;
+  // creo la linea
+   PtrOwner<CurveLine> pCrvLine( CreateBasicCurveLine()) ;
+   if ( IsNull( pCrvLine))
+      return nullptr ;
+  // setto la linea
+   if ( ! pCrvLine->Set( ptP, ptFoot))
+      return nullptr ;
+  // la restituisco
+   return Release( pCrvLine) ;
+}