From 78814a1533cbb545d40582351237505fcfbd0efe Mon Sep 17 00:00:00 2001
From: dahlia <dahlia@nomail>
Date: Mon, 16 Feb 2015 19:42:36 -0800
Subject: [PATCH] Use a boolean flag to signal lookat is running instead of
 Quaternion.Identity so it can be a valid target orientation

---
 OpenSim/Region/Framework/Scenes/SceneObjectPart.cs | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
index 6e56f603cb..4a8be4255a 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectPart.cs
@@ -266,7 +266,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         public Quaternion SpinOldOrientation = Quaternion.Identity;
 
-        protected int m_APIDIterations = 0;
+        protected bool m_APIDActive = false;
         protected Quaternion m_APIDTarget = Quaternion.Identity;
         protected float m_APIDDamp = 0;
         protected float m_APIDStrength = 0;
@@ -642,6 +642,12 @@ namespace OpenSim.Region.Framework.Scenes
             }
         }
 
+        protected bool APIDActive
+        {
+            get { return m_APIDActive; }
+            set { m_APIDActive = value; }
+        }
+
         protected Quaternion APIDTarget
         {
             get { return m_APIDTarget; }
@@ -2621,7 +2627,7 @@ namespace OpenSim.Region.Framework.Scenes
                     return;
                 }
                 
-                m_APIDIterations = 1 + (int)(Math.PI * APIDStrength);
+                APIDActive = true;
             }
 
             // Necessary to get the lookat deltas applied
@@ -2635,7 +2641,7 @@ namespace OpenSim.Region.Framework.Scenes
 
         public void StopLookAt()
         {
-            APIDTarget = Quaternion.Identity;
+            APIDActive = false;
         }
 
 
@@ -4884,7 +4890,7 @@ namespace OpenSim.Region.Framework.Scenes
         {
             try
             {
-                if (APIDTarget != Quaternion.Identity)
+                if (APIDActive)
                 {
                     PhysicsActor pa = ParentGroup.RootPart.PhysActor;
                     if (pa == null || !pa.IsPhysical || APIDStrength < 0.04)