Error of multiplication by zero at zero scalar product fixed

Comparison/src/main/java/cz/fidentis/analyst/visitors/mesh/HausdorffDistance.java

@@ -359,12 +359,12 @@ public class HausdorffDistance extends MeshVisitor  {
         if (relativeDist) { // compute sign for relative distance
             Vector3d aux = new Vector3d(closestV);
             aux.sub(point.getPosition());
-            sign = (int) Math.signum(aux.dot(point.getNormal()));
-        } 
+            sign = aux.dot(point.getNormal()) < 0 ? -1 : 1;
+        }
         
         distances.get(facet).add(sign * dist);
         if (nearestPoints.containsKey(facet)) { // only strategies with the closest points are stored in the map
-            nearestPoints.get(facet).add(closestV); 
+            nearestPoints.get(facet).add(closestV);
         }
     }
     
@@ -373,7 +373,7 @@ public class HausdorffDistance extends MeshVisitor  {
      * @return the only one existing closest vertex or {@code null}
      */
     protected Point3d getClosestVertex(DistanceWithNearestPoints vis) {
-        if (vis.getNearestPoints().size() != 1) { 
+        if (vis.getNearestPoints().size() != 1) {
             return null; // somethig is wrong because there should be only my inspected facet
         }