From 665cf0194afff36f7f4ceae80af83aa253ec61a2 Mon Sep 17 00:00:00 2001
From: dahlia
Date: Mon, 7 Sep 2009 18:02:02 -0700
Subject: llRot2Euler() now returns angles -PI < angle < PI

---
 .../Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs  | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'OpenSim/Region/ScriptEngine/Shared/Api/Implementation')

diff --git a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
index 077315e..f261c16 100644
--- a/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
+++ b/OpenSim/Region/ScriptEngine/Shared/Api/Implementation/LSL_Api.cs
@@ -476,9 +476,14 @@ namespace OpenSim.Region.ScriptEngine.Shared.Api
         // normalize an angle between -PI and PI (-180 to +180 degrees)
         protected double NormalizeAngle(double angle)
         {
-            angle = angle % (Math.PI * 2);
-            // if (angle < 0) angle = angle + Math.PI * 2;
-            return angle;
+            if (angle > -Math.PI && angle < Math.PI)
+                return angle;
+
+            int numPis = (int)(Math.PI / angle);
+            double remainder = angle - Math.PI * numPis;
+            if (numPis % 2 == 1)
+                return Math.PI - angle;
+            return remainder;
         }
 
         // Old implementation of llRot2Euler, now normalized
-- 
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