From 3a7c8d1f3265941105f9d7a5edc4f82057099a83 Mon Sep 17 00:00:00 2001
From: Robert Adams
Date: Sat, 8 Feb 2014 16:11:43 -0800
Subject: BulletSim: the minimum vehicle velocity was set too low so moving
 slow was getting zeroed too easily. Added VehicleMinVelocity parameter.

---
 OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs | 7 ++++++-
 OpenSim/Region/Physics/BulletSPlugin/BSParam.cs    | 6 ++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

(limited to 'OpenSim')

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
index 7b98f9d..0722d70 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
@@ -1011,8 +1011,13 @@ namespace OpenSim.Region.Physics.BulletSPlugin
                 VDetailLog("{0},  MoveLinear,clampMax,origVelW={1},lenSq={2},maxVelSq={3},,newVelW={4}",
                             ControllingPrim.LocalID, origVelW, newVelocityLengthSq, BSParam.VehicleMaxLinearVelocitySquared, VehicleVelocity);
             }
-            else if (newVelocityLengthSq < 0.001f)
+            else if (newVelocityLengthSq < BSParam.VehicleMinLinearVelocitySquared)
+            {
+                Vector3 origVelW = VehicleVelocity;         // DEBUG DEBUG
+                VDetailLog("{0},  MoveLinear,clampMin,origVelW={1},lenSq={2}",
+                            ControllingPrim.LocalID, origVelW, newVelocityLengthSq);
                 VehicleVelocity = Vector3.Zero;
+            }
 
             VDetailLog("{0},  MoveLinear,done,isColl={1},newVel={2}", ControllingPrim.LocalID, ControllingPrim.HasSomeCollision, VehicleVelocity );
 
diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
index d993e6a..860193f 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSParam.cs
@@ -147,6 +147,8 @@ public static class BSParam
     // Vehicle parameters
     public static float VehicleMaxLinearVelocity { get; private set; }
     public static float VehicleMaxLinearVelocitySquared { get; private set; }
+    public static float VehicleMinLinearVelocity { get; private set; }
+    public static float VehicleMinLinearVelocitySquared { get; private set; }
     public static float VehicleMaxAngularVelocity { get; private set; }
     public static float VehicleMaxAngularVelocitySq { get; private set; }
     public static float VehicleAngularDamping { get; private set; }
@@ -598,6 +600,10 @@ public static class BSParam
             1000.0f,
             (s) => { return (float)VehicleMaxLinearVelocity; },
             (s,v) => { VehicleMaxLinearVelocity = v; VehicleMaxLinearVelocitySquared = v * v; } ),
+        new ParameterDefn<float>("VehicleMinLinearVelocity", "Maximum velocity magnitude that can be assigned to a vehicle",
+            0.001f,
+            (s) => { return (float)VehicleMinLinearVelocity; },
+            (s,v) => { VehicleMinLinearVelocity = v; VehicleMinLinearVelocitySquared = v * v; } ),
         new ParameterDefn<float>("VehicleMaxAngularVelocity", "Maximum rotational velocity magnitude that can be assigned to a vehicle",
             12.0f,
             (s) => { return (float)VehicleMaxAngularVelocity; },
-- 
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