Import Geant4 9.0.0 source tree

source/geometry/navigation/include/G4AuxiliaryNavServices.icc

@@ -24,8 +24,8 @@
 // ********************************************************************
 //
 //
-// $Id: G4AuxiliaryNavServices.icc,v 1.3 2006/06/29 18:35:34 gunter Exp $
-// GEANT4 tag $Name: geant4-08-02 $
+// $Id: G4AuxiliaryNavServices.icc,v 1.4 2007/05/22 07:48:08 gcosmo Exp $
+// GEANT4 tag $Name: geant4-09-00 $
 //
 //
 // class G4AuxiliaryNavServices Inline implementation
@@ -86,3 +86,51 @@ CheckPointOnSurface( const G4VSolid* sampleSolid,
   }
   return enter;
 }
+
+// --------------------------------------------------------------------
+
+inline G4bool
+G4AuxiliaryNavServices::
+CheckPointExiting( const G4VSolid* sampleSolid, 
+                   const G4ThreeVector& localPoint, 
+                   const G4ThreeVector* globalDirection, 
+                   const G4AffineTransform& sampleTransform )
+{
+  if( !globalDirection )  { return false; }
+
+  G4ThreeVector localDirection, sampleNormal;
+  G4bool        exiting = false;
+
+  EInside insideSolid = sampleSolid->Inside(localPoint); 
+  if( (insideSolid==kSurface) )
+  {
+    localDirection= sampleTransform.TransformAxis(*globalDirection); 
+
+    // Check whether we are exiting the volume
+    // 
+    sampleNormal = sampleSolid->SurfaceNormal(localPoint);
+    if ( sampleNormal.dot(localDirection) >= 0 )
+    {
+      if( sampleNormal.dot(localDirection) == 0 )
+      {
+        // We can't decide yet, let's make sure we're entering the solid.
+        // If by a confusion we entered the next solid we find out now
+        // whether to leave or to exiting.
+        // This happens when we're on the surface or edge shared by two
+        // solids
+        //
+        G4double distanceToIn =
+                 sampleSolid->DistanceToIn( localPoint, localDirection );
+        if( distanceToIn != kInfinity )
+        {
+          exiting = true;
+        } 
+      }
+      else
+      {
+        exiting = true;
+      }
+    }
+  }
+  return exiting;
+}