From e363b438ef6c67e29bdadd5678c98fef76e17349 Mon Sep 17 00:00:00 2001
From: Treeku <treeku@gmx.com>
Date: Mon, 24 Mar 2014 19:03:22 +0000
Subject: [PATCH] Check for vector norm of 0

---
 src/services/SimulationService.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/services/SimulationService.java b/src/services/SimulationService.java
index 9b9a81ab..296cdf40 100644
--- a/src/services/SimulationService.java
+++ b/src/services/SimulationService.java
@@ -982,6 +982,13 @@ public class SimulationService implements INetworkDispatch {
 		Point3D end = new Point3D(position2.x, position2.y + 1, position2.z);
 		
 		Vector3D direction = new Vector3D(end.x - origin.x, end.y - origin.y, end.z - origin.z).normalize();
+		
+		if (direction.getNorm() != 0) {
+			direction.normalize();
+		} else {
+			System.out.println("WARNING: checkLineOfSightInBuilding: Vector norm was 0.");
+		}
+		
 		float distance = position1.getDistance2D(position2);
 		Ray ray = new Ray(origin, direction);