1 files changed, 50 insertions, 18 deletions

diff --git a/linden/indra/newview/lltoolgrab.cpp b/linden/indra/newview/lltoolgrab.cpp
index 74810d1..b49e8de 100644
--- a/linden/indra/newview/lltoolgrab.cpp
+++ b/linden/indra/newview/lltoolgrab.cpp
@@ -400,6 +400,13 @@ void LLToolGrab::startGrab()
         mGrabHiddenOffsetFromCamera = mDragStartFromCamera;
 
         mGrabTimer.reset();
+
+        mLastUVCoords = mGrabPick.mUVCoords;
+        mLastSTCoords = mGrabPick.mSTCoords;
+        mLastFace = mGrabPick.mObjectFace;
+        mLastIntersection = mGrabPick.mIntersection;
+        mLastNormal = mGrabPick.mNormal;
+        mLastBinormal = mGrabPick.mBinormal;
 }
 
 
@@ -797,26 +804,51 @@ void LLToolGrab::handleHoverNonPhysical(S32 x, S32 y, MASK mask)
                 grab_pos_region = objectp->getRegion()->getPosRegionFromGlobal( grab_point_global );
         }
 
-        LLMessageSystem *msg = gMessageSystem;
-        msg->newMessageFast(_PREHASH_ObjectGrabUpdate);
-        msg->nextBlockFast(_PREHASH_AgentData);
-        msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
-        msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
-        msg->nextBlockFast(_PREHASH_ObjectData);
-        msg->addUUIDFast(_PREHASH_ObjectID, objectp->getID() );
-        msg->addVector3Fast(_PREHASH_GrabOffsetInitial, mGrabOffsetFromCenterInitial );
-        msg->addVector3Fast(_PREHASH_GrabPosition, grab_pos_region );
-        msg->addU32Fast(_PREHASH_TimeSinceLast, dt_milliseconds );
-        msg->nextBlock("SurfaceInfo");
-        msg->addVector3("UVCoord", LLVector3(pick.mUVCoords));
-        msg->addVector3("STCoord", LLVector3(pick.mSTCoords));
-        msg->addS32Fast(_PREHASH_FaceIndex, pick.mObjectFace);
-        msg->addVector3("Position", pick.mIntersection);
-        msg->addVector3("Normal", pick.mNormal);
-        msg->addVector3("Binormal", pick.mBinormal);
 
-        msg->sendMessage( objectp->getRegion()->getHost() );
+        // only send message if something has changed since last message
+        
+        BOOL changed_since_last_update = FALSE;
+
+        if ((pick.mObjectFace != mLastFace) ||
+                (pick.mUVCoords != mLastUVCoords) ||
+                (pick.mSTCoords != mLastSTCoords) ||
+                (pick.mIntersection != mLastIntersection) ||
+                (pick.mNormal != mLastNormal) ||
+                (pick.mBinormal != mLastBinormal))
+        {
+                changed_since_last_update = TRUE;
+        }
 
+        if (changed_since_last_update)
+        {
+                LLMessageSystem *msg = gMessageSystem;
+                msg->newMessageFast(_PREHASH_ObjectGrabUpdate);
+                msg->nextBlockFast(_PREHASH_AgentData);
+                msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
+                msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
+                msg->nextBlockFast(_PREHASH_ObjectData);
+                msg->addUUIDFast(_PREHASH_ObjectID, objectp->getID() );
+                msg->addVector3Fast(_PREHASH_GrabOffsetInitial, mGrabOffsetFromCenterInitial );
+                msg->addVector3Fast(_PREHASH_GrabPosition, grab_pos_region );
+                msg->addU32Fast(_PREHASH_TimeSinceLast, dt_milliseconds );
+                msg->nextBlock("SurfaceInfo");
+                msg->addVector3("UVCoord", LLVector3(pick.mUVCoords));
+                msg->addVector3("STCoord", LLVector3(pick.mSTCoords));
+                msg->addS32Fast(_PREHASH_FaceIndex, pick.mObjectFace);
+                msg->addVector3("Position", pick.mIntersection);
+                msg->addVector3("Normal", pick.mNormal);
+                msg->addVector3("Binormal", pick.mBinormal);
+
+                msg->sendMessage( objectp->getRegion()->getHost() );
+
+                mLastUVCoords = pick.mUVCoords;
+                mLastSTCoords = pick.mSTCoords;
+                mLastFace = pick.mObjectFace;
+                mLastIntersection = pick.mIntersection;
+                mLastNormal= pick.mNormal;
+                mLastBinormal= pick.mBinormal;
+        }
+        
         // update point-at / look-at
         if (pick.mObjectFace != -1) // if the intersection was on the surface of the obejct
         {