BulletSim: Another way to create vehicle framed friction.

Signed-off-by: Robert Adams <Robert.Adams@intel.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
index 04ea289..e93dbd7 100644
--- a/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSDynamics.cs
@@ -1028,6 +1028,10 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             Vector3 currentVelV = VehicleVelocity * Quaternion.Inverse(VehicleOrientation);
             Vector3 linearMotorCorrectionV = m_linearMotor.Step(pTimestep, currentVelV);
 
+            // Friction reduces vehicle motion
+            Vector3 frictionFactorW = ComputeFrictionFactor(m_linearFrictionTimescale, pTimestep);
+            linearMotorCorrectionV -= (currentVelV * frictionFactorW);
+
             // Motor is vehicle coordinates. Rotate it to world coordinates
             Vector3 linearMotorVelocityW = linearMotorCorrectionV * VehicleOrientation;
 
@@ -1041,9 +1045,7 @@ namespace OpenSim.Region.Physics.BulletSPlugin
             // Add this correction to the velocity to make it faster/slower.
             VehicleVelocity += linearMotorVelocityW;
 
-            // Friction reduces vehicle motion
-            Vector3 frictionFactorW = ComputeFrictionFactor(m_linearFrictionTimescale, pTimestep) * VehicleOrientation;
-            VehicleVelocity -= (VehicleVelocity * frictionFactorW);
+
 
             VDetailLog("{0},  MoveLinear,velocity,origVelW={1},velV={2},correctV={3},correctW={4},newVelW={5},fricFact={6}",
                         ControllingPrim.LocalID, origVelW, currentVelV, linearMotorCorrectionV,