BulletSim: add ClearCollisionProxyCache function to API.

Add proxy cache clearing when some properties are changed. This fixes
a problem where objects would stop colliding of they were moved
with setPosition mulitple times.

1 files changed, 10 insertions, 2 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs b/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
index 2efb1a5..47df611 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSPhysObject.cs
@@ -300,8 +300,16 @@ public abstract class BSPhysObject : PhysicsActor
     // Called in taint-time!!
     public void ActivateIfPhysical(bool forceIt)
     {
-        if (IsPhysical && PhysBody.HasPhysicalBody)
-            PhysScene.PE.Activate(PhysBody, forceIt);
+        if (PhysBody.HasPhysicalBody)
+        {
+            // Clear the collision cache since we've changed some properties.
+            PhysScene.PE.ClearCollisionProxyCache(PhysScene.World, PhysBody);
+            if (IsPhysical)
+            {
+                // Physical objects might need activating
+                PhysScene.PE.Activate(PhysBody, forceIt);
+            }
+        }
     }
 
     // 'actors' act on the physical object to change or constrain its motion. These can range from