From b242ead6df06f013f507a4a15495a2720ec5d089 Mon Sep 17 00:00:00 2001
From: dahlia
Date: Mon, 10 Jun 2013 17:10:04 -0700
Subject: llRot2Axis now checks absolute value of s rotation component before
 normalizing. Also removed some excessive division and cleaned up a bit

---
 .../Shared/Api/Implementation/LSL_Api.cs           | 28 +++++-----------------
 1 file changed, 6 insertions(+), 22 deletions(-)

(limited to 'OpenSim/Region/ScriptEngine')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 9427061..c48285a 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -4665,37 +4665,21 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         public LSL_Vector llRot2Axis(LSL_Rotation rot)
         {
             m_host.AddScriptLPS(1);
-            double x,y,z;
+            double x, y, z;
 
-            if (rot.s > 1) // normalization needed
-            {
-                double length = Math.Sqrt(rot.x * rot.x + rot.y * rot.y +
-                        rot.z * rot.z + rot.s * rot.s);
-
-                rot.x /= length;
-                rot.y /= length;
-                rot.z /= length;
-                rot.s /= length;
-
-            }
+            if (Math.Abs(rot.s) > 1) // normalization needed
+                rot.Normalize();
 
-            // double angle = 2 * Math.Acos(rot.s);
             double s = Math.Sqrt(1 - rot.s * rot.s);
             if (s < 0.001)
             {
-                x = 1;
-                y = z = 0;
+                return new LSL_Vector(1, 0, 0);
             }
             else
             {
-                x = rot.x / s; // normalise axis
-                y = rot.y / s;
-                z = rot.z / s;
+                double invS = 1.0 / s;
+                return new LSL_Vector(rot.x * invS, rot.y * invS, rot.z * invS);
             }
-            if ((double.IsNaN(x)) || double.IsInfinity(x)) x = 0;
-            if ((double.IsNaN(y)) || double.IsInfinity(y)) y = 0;
-            if ((double.IsNaN(z)) || double.IsInfinity(z)) z = 0;
-            return new LSL_Vector(x,y,z);
         }
 
 
-- 
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