1 files changed, 41 insertions, 30 deletions

diff --git a/indra/newview/llviewerobject.cpp b/indra/newview/llviewerobject.cpp
index 8bee59a107..fc198a717b 100644
--- a/indra/newview/llviewerobject.cpp
+++ b/indra/newview/llviewerobject.cpp
@@ -237,6 +237,7 @@ LLViewerObject::LLViewerObject(const LLUUID &id, const LLPCode pcode, LLViewerRe
 	mTimeDilation(1.f),
 	mRotTime(0.f),
 	mAngularVelocityRot(),
+	mPreviousRotation(),
 	mState(0),
 	mMedia(NULL),
 	mClickAction(0),
@@ -784,7 +785,7 @@ BOOL LLViewerObject::setDrawableParent(LLDrawable* parentp)
 	}
 	LLDrawable* old_parent = mDrawable->mParent;
 	mDrawable->mParent = parentp; 
-	
+		
 	if (parentp && mDrawable->isActive())
 	{
 		parentp->makeActive();
@@ -1409,9 +1410,10 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 #else
 					val = (U16 *) &data[count];
 #endif
-					setAngularVelocity(	U16_to_F32(val[VX], -size, size),
+					new_angv.set(U16_to_F32(val[VX], -size, size),
 										U16_to_F32(val[VY], -size, size),
 										U16_to_F32(val[VZ], -size, size));
+					setAngularVelocity(new_angv);
 					break;
 
 				case 16:
@@ -1435,9 +1437,10 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 					new_rot.mQ[VZ] = U8_to_F32(data[11], -1.f, 1.f);
 					new_rot.mQ[VW] = U8_to_F32(data[12], -1.f, 1.f);
 
-					setAngularVelocity(	U8_to_F32(data[13], -size, size),
+					new_angv.set(U8_to_F32(data[13], -size, size),
 										U8_to_F32(data[14], -size, size),
 										U8_to_F32(data[15], -size, size) );
+					setAngularVelocity(new_angv);
 					break;
 				}
 
@@ -1509,9 +1512,10 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 				dp->unpackU16(val[VX], "AccX");
 				dp->unpackU16(val[VY], "AccY");
 				dp->unpackU16(val[VZ], "AccZ");
-				setAngularVelocity(	U16_to_F32(val[VX], -64.f, 64.f),
+				new_angv.set(U16_to_F32(val[VX], -64.f, 64.f),
 									U16_to_F32(val[VY], -64.f, 64.f),
 									U16_to_F32(val[VZ], -64.f, 64.f));
+				setAngularVelocity(new_angv);
 			}
 			break;
 			case OUT_FULL_COMPRESSED:
@@ -1555,8 +1559,8 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 
 				if (value & 0x80)
 				{
-					dp->unpackVector3(vec, "Omega");
-					setAngularVelocity(vec);
+					dp->unpackVector3(new_angv, "Omega");
+					setAngularVelocity(new_angv);
 				}
 
 				if (value & 0x20)
@@ -2037,12 +2041,16 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 		}
 	}
 
-	if (new_rot != getRotation()
-		|| new_angv != old_angv)
+	if ((new_rot != getRotation())
+		|| (new_angv != old_angv))
+	{
+		if (new_rot != mPreviousRotation)
 	{
-		if (new_angv != old_angv)
+			resetRot();
+		}
+		else if (new_angv != old_angv)
 		{
-			if (flagUsePhysics())
+			if (flagUsePhysics() || new_angv.isExactlyZero())
 			{
 				resetRot();
 			}
@@ -2052,6 +2060,9 @@ U32 LLViewerObject::processUpdateMessage(LLMessageSystem *mesgsys,
 			}
 		}
 
+		// Remember the last rotation value
+		mPreviousRotation = new_rot;
+
 		// Set the rotation of the object followed by adjusting for the accumulated angular velocity (llSetTargetOmega)
 		setRotation(new_rot * mAngularVelocityRot);
 		setChanged(ROTATED | SILHOUETTE);
@@ -2158,29 +2169,29 @@ void LLViewerObject::idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time)
 
 	if (!mDead)
 	{
-		// CRO - don't velocity interp linked objects!
-		// Leviathan - but DO velocity interp joints
-		if (!mStatic && sVelocityInterpolate && !isSelected())
-		{
-			// calculate dt from last update
-			F32 dt_raw = (F32)(time - mLastInterpUpdateSecs);
-			F32 dt = mTimeDilation * dt_raw;
+	// CRO - don't velocity interp linked objects!
+	// Leviathan - but DO velocity interp joints
+	if (!mStatic && sVelocityInterpolate && !isSelected())
+	{
+		// calculate dt from last update
+		F32 dt_raw = (F32)(time - mLastInterpUpdateSecs);
+		F32 dt = mTimeDilation * dt_raw;
 
 			applyAngularVelocity(dt);
-			
+
 			if (isAttachment())
-			{
-				mLastInterpUpdateSecs = time;
+				{
+					mLastInterpUpdateSecs = time;
 				return;
-			}
-			else
-			{	// Move object based on it's velocity and rotation
-				interpolateLinearMotion(time, dt);
-			}
 		}
-
-		updateDrawable(FALSE);
+		else
+		{	// Move object based on it's velocity and rotation
+			interpolateLinearMotion(time, dt);
+		}
 	}
+
+	updateDrawable(FALSE);
+}
 }
 
 
@@ -5350,9 +5361,9 @@ void LLViewerObject::setPhysicsShapeType(U8 type)
 	mPhysicsShapeUnknown = false;
 	if (type != mPhysicsShapeType)
 	{
-		mPhysicsShapeType = type;
-		mCostStale = true;
-	}
+	mPhysicsShapeType = type;
+	mCostStale = true;
+}
 }
 
 void LLViewerObject::setPhysicsGravity(F32 gravity)