From c155099faf9db4a8dd438be2ddd8a2272b85477a Mon Sep 17 00:00:00 2001
From: Teravus Ovares (Dan Olivares)
Date: Sun, 22 Nov 2009 19:26:00 -0500
Subject: * The client prevents the avatar from landing if the avatar is going
 above an unknown certain speed, so, add a speed check on the server. * This
 addresses the 'hump the prim' animation playing while you're moving forward
 full speed and pressing page down over a prim to land.

---
 OpenSim/Region/Framework/Scenes/ScenePresence.cs | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

(limited to 'OpenSim')

diff --git a/OpenSim/Region/Framework/Scenes/ScenePresence.cs b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
index 0d1133f..d23d303 100644
--- a/OpenSim/Region/Framework/Scenes/ScenePresence.cs
+++ b/OpenSim/Region/Framework/Scenes/ScenePresence.cs
@@ -152,6 +152,8 @@ namespace OpenSim.Region.Framework.Scenes
 
         private Quaternion m_bodyRot= Quaternion.Identity;
 
+        private const int LAND_VELOCITYMAG_MAX = 12;
+
         public bool IsRestrictedToRegion;
 
         public string JID = String.Empty;
@@ -978,8 +980,8 @@ namespace OpenSim.Region.Framework.Scenes
         public void StopFlying()
         {
             // It turns out to get the agent to stop flying, you have to feed it stop flying velocities
-            // and send a full object update.
-            // There's no message to send the client to tell it to stop flying
+            // There's no explicit message to send the client to tell it to stop flying..   it relies on the 
+            // velocity, collision plane and avatar height
 
             // Add 1/6 the avatar's height to it's position so it doesn't shoot into the air
             // when the avatar stands up
@@ -993,8 +995,6 @@ namespace OpenSim.Region.Framework.Scenes
                 AbsolutePosition = AbsolutePosition + new Vector3(0f, 0f, (1.56f / 6f));
             }
 
-            Animator.TrySetMovementAnimation("LAND");
-            //SendFullUpdateToAllClients();
             ControllingClient.SendAvatarTerseUpdate(new SendAvatarTerseData(m_rootRegionHandle, (ushort)(m_scene.TimeDilation * ushort.MaxValue), LocalId,
                     AbsolutePosition, Velocity, Vector3.Zero, m_bodyRot, new Vector4(0,0,1,AbsolutePosition.Z - 0.5f), m_uuid, null, GetUpdatePriority(ControllingClient)));
         }
@@ -1431,6 +1431,8 @@ namespace OpenSim.Region.Framework.Scenes
                 // Only do this if we're flying
                 if (m_physicsActor != null && m_physicsActor.Flying && !m_forceFly)
                 {
+                    // Landing detection code
+
                     // Are the landing controls requirements filled?
                     bool controlland = (((flags & AgentManager.ControlFlags.AGENT_CONTROL_UP_NEG) != 0) ||
                                         ((flags & AgentManager.ControlFlags.AGENT_CONTROL_NUDGE_UP_NEG) != 0));
@@ -1440,7 +1442,10 @@ namespace OpenSim.Region.Framework.Scenes
 
                     if (m_physicsActor.Flying && colliding && controlland)
                     {
-                        StopFlying();
+                        // nesting this check because LengthSquared() is expensive and we don't 
+                        // want to do it every step when flying.
+                        if ((Velocity.LengthSquared() <= LAND_VELOCITYMAG_MAX))
+                            StopFlying();
                     }
                 }
 
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