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diff --git a/indra/llcharacter/llmotion.h b/indra/llcharacter/llmotion.h
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+/** 
+ * @file llmotion.h
+ * @brief Implementation of LLMotion class.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_LLMOTION_H
+#define LL_LLMOTION_H
+
+//-----------------------------------------------------------------------------
+// Header files
+//-----------------------------------------------------------------------------
+#include <string>
+
+#include "llerror.h"
+#include "llpose.h"
+#include "lluuid.h"
+
+class LLCharacter;
+
+//-----------------------------------------------------------------------------
+// class LLMotion
+//-----------------------------------------------------------------------------
+class LLMotion
+{
+public:
+	enum LLMotionBlendType
+	{
+		NORMAL_BLEND,
+		ADDITIVE_BLEND
+	};
+
+	enum LLMotionInitStatus
+	{
+		STATUS_FAILURE,
+		STATUS_SUCCESS,
+		STATUS_HOLD
+	};
+
+	// Constructor
+	LLMotion(const LLUUID &id);
+
+	// Destructor
+	virtual ~LLMotion();
+
+public:
+	//-------------------------------------------------------------------------
+	// functions to support MotionController and MotionRegistry
+	//-------------------------------------------------------------------------
+
+	// static constructor
+	// all subclasses must implement such a function and register it
+	static LLMotion *create(const LLUUID &id) { return NULL; }
+
+	// get the name of this instance
+	const std::string &getName() const { return mName; }
+
+	// set the name of this instance
+	void setName(const std::string &name) { mName = name; }
+
+	const LLUUID& getID() const { return mID; }
+
+	// returns the pose associated with the current state of this motion
+	virtual LLPose* getPose() { return &mPose;}
+
+	void fadeOut();
+
+	void fadeIn();
+
+	F32 getFadeWeight() const { return mFadeWeight; }
+
+	F32 getStopTime() const { return mStopTimestamp; }
+
+	virtual void setStopTime(F32 time) { mStopTimestamp = time; mStopped = TRUE; }
+
+	BOOL isStopped() const { return mStopped; }
+
+	void setStopped(BOOL stopped) { mStopped = stopped; }
+
+	void activate();
+
+	void deactivate();
+
+	BOOL isActive() { return mActive; }
+
+
+public:
+	//-------------------------------------------------------------------------
+	// animation callbacks to be implemented by subclasses
+	//-------------------------------------------------------------------------
+
+	// motions must specify whether or not they loop
+	virtual BOOL getLoop() = 0;
+
+	// motions must report their total duration
+	virtual F32 getDuration() = 0;
+
+	// motions must report their "ease in" duration
+	virtual F32 getEaseInDuration() = 0;
+
+	// motions must report their "ease out" duration.
+	virtual F32 getEaseOutDuration() = 0;
+
+	// motions must report their priority level
+	virtual LLJoint::JointPriority getPriority() = 0;
+
+	// motions must report their blend type
+	virtual LLMotionBlendType getBlendType() = 0;
+
+	// called to determine when a motion should be activated/deactivated based on avatar pixel coverage
+	virtual F32 getMinPixelArea() = 0;
+
+	// run-time (post constructor) initialization,
+	// called after parameters have been set
+	// must return true to indicate success and be available for activation
+	virtual LLMotionInitStatus onInitialize(LLCharacter *character) = 0;
+
+	// called per time step
+	// must return TRUE while it is active, and
+	// must return FALSE when the motion is completed.
+	virtual BOOL onUpdate(F32 activeTime, U8* joint_mask) = 0;
+
+	// called when a motion is deactivated
+	virtual void onDeactivate() = 0;
+
+	// optional callback routine called when animation deactivated.
+	void	setDeactivateCallback( void (*cb)(void *), void* userdata );
+
+protected:
+	// called when a motion is activated
+	// must return TRUE to indicate success, or else
+	// it will be deactivated
+	virtual BOOL onActivate() = 0;
+
+	void addJointState(LLJointState* jointState);
+
+protected:
+	LLPose		mPose;
+	BOOL		mStopped;		// motion has been stopped;
+	BOOL		mActive;		// motion is on active list (can be stopped or not stopped)
+
+public:
+	//-------------------------------------------------------------------------
+	// these are set implicitly by the motion controller and
+	// may be referenced (read only) in the above handlers.
+	//-------------------------------------------------------------------------
+	std::string		mName;			// instance name assigned by motion controller
+	LLUUID			mID;
+
+	F32 mActivationTimestamp;	// time when motion was activated
+	F32 mStopTimestamp;			// time when motion was told to stop
+	F32 mSendStopTimestamp;		// time when simulator should be told to stop this motion
+	F32 mResidualWeight;		// blend weight at beginning of stop motion phase
+	F32 mFadeWeight;			// for fading in and out based on LOD
+	U8	mJointSignature[3][LL_CHARACTER_MAX_JOINTS];	// signature of which joints are animated at what priority
+	void (*mDeactivateCallback)(void* data);
+	void* mDeactivateCallbackUserData;
+};
+
+
+//-----------------------------------------------------------------------------
+// LLTestMotion
+//-----------------------------------------------------------------------------
+class LLTestMotion : public LLMotion
+{
+public:
+	LLTestMotion(const LLUUID &id) : LLMotion(id){}
+	~LLTestMotion() {}
+	static LLMotion *create(const LLUUID& id) { return new LLTestMotion(id); }
+	BOOL getLoop() { return FALSE; }
+	F32 getDuration() { return 0.0f; }
+	F32 getEaseInDuration() { return 0.0f; }
+	F32 getEaseOutDuration() { return 0.0f; }
+	LLJoint::JointPriority getPriority() { return LLJoint::HIGH_PRIORITY; }
+	LLMotionBlendType getBlendType() { return NORMAL_BLEND; }
+	F32 getMinPixelArea() { return 0.f; }
+	
+	LLMotionInitStatus onInitialize(LLCharacter*) { llinfos << "LLTestMotion::onInitialize()" << llendl; return STATUS_SUCCESS; }
+	BOOL onActivate() { llinfos << "LLTestMotion::onActivate()" << llendl; return TRUE; }
+	BOOL onUpdate(F32 time, U8* joint_mask) { llinfos << "LLTestMotion::onUpdate(" << time << ")" << llendl; return TRUE; }
+	void onDeactivate() { llinfos << "LLTestMotion::onDeactivate()" << llendl; }
+};
+
+
+//-----------------------------------------------------------------------------
+// LLNullMotion
+//-----------------------------------------------------------------------------
+class LLNullMotion : public LLMotion
+{
+public:
+	LLNullMotion(const LLUUID &id) : LLMotion(id) {}
+	~LLNullMotion() {}
+	static LLMotion *create(const LLUUID &id) { return new LLNullMotion(id); }
+
+	// motions must specify whether or not they loop
+	/*virtual*/ BOOL getLoop() { return TRUE; }
+
+	// motions must report their total duration
+	/*virtual*/ F32 getDuration() { return 1.f; }
+
+	// motions must report their "ease in" duration
+	/*virtual*/ F32 getEaseInDuration() { return 0.f; }
+
+	// motions must report their "ease out" duration.
+	/*virtual*/ F32 getEaseOutDuration() { return 0.f; }
+
+	// motions must report their priority level
+	/*virtual*/ LLJoint::JointPriority getPriority() { return LLJoint::HIGH_PRIORITY; }
+
+	// motions must report their blend type
+	/*virtual*/ LLMotionBlendType getBlendType() { return NORMAL_BLEND; }
+
+	// called to determine when a motion should be activated/deactivated based on avatar pixel coverage
+	/*virtual*/ F32 getMinPixelArea() { return 0.f; }
+
+	// run-time (post constructor) initialization,
+	// called after parameters have been set
+	// must return true to indicate success and be available for activation
+	/*virtual*/ LLMotionInitStatus onInitialize(LLCharacter *character) { return STATUS_SUCCESS; }
+
+	// called when a motion is activated
+	// must return TRUE to indicate success, or else
+	// it will be deactivated
+	/*virtual*/ BOOL onActivate() { return TRUE; }
+
+	// called per time step
+	// must return TRUE while it is active, and
+	// must return FALSE when the motion is completed.
+	/*virtual*/ BOOL onUpdate(F32 activeTime, U8* joint_mask) { return TRUE; }
+
+	// called when a motion is deactivated
+	/*virtual*/ void onDeactivate() {}
+};
+#endif // LL_LLMOTION_H
+