diff --git a/CDeCylTria.cpp b/CDeCylTria.cpp
index 998937b..7ca70dc 100644
--- a/CDeCylTria.cpp
+++ b/CDeCylTria.cpp
@@ -50,12 +50,12 @@ CDeSimpleCylTria( const Frame3d& frCyl, double dR, double dH, const Triangle3d&
          DistPointLine dstPL( ORIG, vVert[i], vVert[j]) ;
          double dSqDist ;
          if ( dstPL.GetSqDist( dSqDist)) {
-           // se distanza maggiore del raggio, allora non collide
-            if ( dSqDist > dR * dR)
-               return false ;
+           // se distanza minore del raggio, allora collide
+            if ( dSqDist <= dR * dR)
+               return true ;
          }
       }
-      return true ;
+      return false ;
    }
   // Verifico che sia orientato verso l'alto
    if ( plyTria.GetVersN().z < - EPS_SMALL)
diff --git a/EgtGeomKernel.rc b/EgtGeomKernel.rc
index 67d9a26..eba8a13 100644
Binary files a/EgtGeomKernel.rc and b/EgtGeomKernel.rc differ