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, 13 insertions, 0 deletions

diff --git a/OpenSim/Region/Physics/BulletSPlugin/BSAPIXNA.cs b/OpenSim/Region/Physics/BulletSPlugin/BSAPIXNA.cs
index ff2b497..17ebed2 100755
--- a/OpenSim/Region/Physics/BulletSPlugin/BSAPIXNA.cs
+++ b/OpenSim/Region/Physics/BulletSPlugin/BSAPIXNA.cs
@@ -169,6 +169,19 @@ private sealed class BulletConstraintXNA : BulletConstraint
         return true;
     }
 
+    public override bool ClearCollisionProxyCache(BulletWorld pWorld, BulletBody pBody)
+    {
+        DiscreteDynamicsWorld world = (pWorld as BulletWorldXNA).world;
+        RigidBody body = ((BulletBodyXNA)pBody).rigidBody;
+        CollisionObject collisionObject = ((BulletBodyXNA)pBody).body;
+        if (body != null && collisionObject != null && collisionObject.GetBroadphaseHandle() != null)
+        {
+            world.RemoveCollisionObject(collisionObject);
+            world.AddCollisionObject(collisionObject);
+        }
+        return true;
+    }
+
     public override bool AddConstraintToWorld(BulletWorld pWorld, BulletConstraint pConstraint, bool pDisableCollisionsBetweenLinkedObjects)
     {
         DiscreteDynamicsWorld world = (pWorld as BulletWorldXNA).world;