From c2f3ff872dd88b4382b41844a4faa632129d1760 Mon Sep 17 00:00:00 2001
From: Adam Frisby
Date: Mon, 23 Feb 2009 06:55:42 +0000
Subject: * Performance Changes: * Moves Entity Updates into a seperate thread,
 allowing for OpenSim to utilize a computers CPU more effectively in return
 for potentially greater user and prim capacity. * Removes an expensive Sqrt
 call performed during Update on each object. This should lower CPU
 requirements for high-prim regions with physics enabled. * MXP Changes:
 Centers the region around 0,0 for primitives instead of 128,128. Prim display
 should now look more correct for MXP viewers.

---
 OpenSim/Framework/Util.cs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'OpenSim/Framework')

diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index 2718072..4fce4ac 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -89,6 +89,21 @@ namespace OpenSim.Framework
         }
 
         /// <summary>
+        /// Returns true if the distance beween A and B is less than amount. Significantly faster than GetDistanceTo since it eliminates the Sqrt.
+        /// </summary>
+        /// <param name="a"></param>
+        /// <param name="b"></param>
+        /// <param name="amount"></param>
+        /// <returns></returns>
+        public static bool DistanceLessThan(Vector3 a, Vector3 b, double amount)
+        {
+            float dx = a.X - b.X;
+            float dy = a.Y - b.Y;
+            float dz = a.Z - b.Z;
+            return (dx*dx + dy*dy + dz*dz) < (amount*amount);           
+        }
+
+        /// <summary>
         /// Get the magnitude of a 3d vector
         /// </summary>
         /// <param name="a">A 3d vector</param>
-- 
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