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diff --git a/indra/llcharacter/lljoint.h b/indra/llcharacter/lljoint.h
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+++ b/indra/llcharacter/lljoint.h
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+/** 
+ * @file lljoint.h
+ * @brief Implementation of LLJoint class.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+#ifndef LL_LLJOINT_H
+#define LL_LLJOINT_H
+
+//-----------------------------------------------------------------------------
+// Header Files
+//-----------------------------------------------------------------------------
+#include <string>
+
+#include "linked_lists.h"
+#include "v3math.h"
+#include "v4math.h"
+#include "m4math.h"
+#include "llquaternion.h"
+#include "xform.h"
+#include "lldarray.h"
+
+const S32 LL_CHARACTER_MAX_JOINTS_PER_MESH = 15;
+const U32 LL_CHARACTER_MAX_JOINTS = 32; // must be divisible by 4!
+const U32 LL_HAND_JOINT_NUM = 31;
+const U32 LL_FACE_JOINT_NUM = 30;
+const S32 LL_CHARACTER_MAX_PRIORITY = 7;
+const F32 LL_MAX_PELVIS_OFFSET = 5.f;
+
+//-----------------------------------------------------------------------------
+// class LLJoint
+//-----------------------------------------------------------------------------
+class LLJoint
+{
+public:
+	// priority levels, from highest to lowest
+	enum JointPriority
+	{
+		USE_MOTION_PRIORITY = -1,
+		LOW_PRIORITY = 0,
+		MEDIUM_PRIORITY,
+		HIGH_PRIORITY,
+		HIGHER_PRIORITY,
+		HIGHEST_PRIORITY,
+		ADDITIVE_PRIORITY = LL_CHARACTER_MAX_PRIORITY
+	};
+
+	enum DirtyFlags
+	{
+		MATRIX_DIRTY = 0x1 << 0,
+		ROTATION_DIRTY = 0x1 << 1,
+		POSITION_DIRTY = 0x1 << 2,
+		ALL_DIRTY = 0x7
+	};
+protected:
+	std::string	mName;
+
+	// parent joint
+	LLJoint	*mParent;
+
+	// explicit transformation members
+	LLXformMatrix		mXform;
+
+public:
+	U32				mDirtyFlags;
+	BOOL			mWorldRotationDirty;
+	BOOL			mUpdateXform;
+
+	// describes the skin binding pose
+	LLVector3		mSkinOffset;
+
+	S32				mJointNum;
+
+	LLDynamicArray<LLVector3> mConstraintSilhouette;
+
+	// child joints
+	LLLinkedList<LLJoint> mChildren;
+
+	// debug statics
+	static S32		sNumTouches;
+	static S32		sNumUpdates;
+
+public:
+	LLJoint();
+	LLJoint( const std::string &name, LLJoint *parent=NULL );
+
+	virtual ~LLJoint();
+
+	// set name and parent
+	void setup( const std::string &name, LLJoint *parent=NULL );
+
+	void touch(U32 flags = ALL_DIRTY);
+
+	// get/set name
+	const std::string &getName() { return mName; }
+	void setName( const std::string &name ) { mName = name; }
+
+	// getParent
+	LLJoint *getParent() { return mParent; }
+
+	// getRoot
+	LLJoint *getRoot();
+
+	// search for child joints by name
+	LLJoint *findJoint( const std::string &name );
+
+	// add/remove children
+	void addChild( LLJoint *joint );
+	void removeChild( LLJoint *joint );
+	void removeAllChildren();
+
+	// get/set local position
+	const LLVector3& getPosition();
+	void setPosition( const LLVector3& pos );
+
+	// get/set world position
+	LLVector3 getWorldPosition();
+	LLVector3 getLastWorldPosition();
+	void setWorldPosition( const LLVector3& pos );
+
+	// get/set local rotation
+	const LLQuaternion& getRotation();
+	void setRotation( const LLQuaternion& rot );
+
+	// get/set world rotation
+	LLQuaternion getWorldRotation();
+	LLQuaternion getLastWorldRotation();
+	void setWorldRotation( const LLQuaternion& rot );
+
+	// get/set local scale
+	const LLVector3& getScale();
+	void setScale( const LLVector3& scale );
+
+	// get/set world matrix
+	const LLMatrix4 &getWorldMatrix();
+	void setWorldMatrix( const LLMatrix4& mat );
+
+	void updateWorldMatrixChildren();
+	void updateWorldMatrixParent();
+
+	void updateWorldPRSParent();
+
+	void updateWorldMatrix();
+
+	// get/set skin offset
+	const LLVector3 &getSkinOffset();
+	void setSkinOffset( const LLVector3 &offset);
+
+	LLXformMatrix	*getXform() { return &mXform; }
+
+	void setConstraintSilhouette(LLDynamicArray<LLVector3>& silhouette);
+
+	void clampRotation(LLQuaternion old_rot, LLQuaternion new_rot);
+
+	virtual BOOL isAnimatable() { return TRUE; }
+
+	S32 getJointNum() { return mJointNum; }
+	void setJointNum(S32 joint_num) { mJointNum = joint_num; }
+};
+#endif // LL_LLJOINT_H
+