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diff --git a/indra/llcharacter/lljoint.cpp b/indra/llcharacter/lljoint.cpp
new file mode 100644
index 0000000000..3924c06adc
--- /dev/null
+++ b/indra/llcharacter/lljoint.cpp
@@ -0,0 +1,504 @@
+/** 
+ * @file lljoint.cpp
+ * @brief Implementation of LLJoint class.
+ *
+ * Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
+ * $License$
+ */
+
+//-----------------------------------------------------------------------------
+// Header Files
+//-----------------------------------------------------------------------------
+#include "linden_common.h"
+
+#include "lljoint.h"
+
+#include "llmath.h"
+
+S32 LLJoint::sNumUpdates = 0;
+S32 LLJoint::sNumTouches = 0;
+
+//-----------------------------------------------------------------------------
+// LLJoint()
+// Class Constructor
+//-----------------------------------------------------------------------------
+LLJoint::LLJoint()
+{
+	mName = "unnamed";
+	mParent = NULL;
+	mXform.setScaleChildOffset(TRUE);
+	mXform.setScale(LLVector3(1.0f, 1.0f, 1.0f));
+	mDirtyFlags = MATRIX_DIRTY | ROTATION_DIRTY | POSITION_DIRTY;
+	mUpdateXform = TRUE;
+	mJointNum = -1;
+	touch();
+}
+
+
+//-----------------------------------------------------------------------------
+// LLJoint()
+// Class Constructor
+//-----------------------------------------------------------------------------
+LLJoint::LLJoint(const std::string &name, LLJoint *parent)
+{
+	mName = "unnamed";
+	mParent = NULL;
+	mXform.setScaleChildOffset(TRUE);
+	mXform.setScale(LLVector3(1.0f, 1.0f, 1.0f));
+	mDirtyFlags = MATRIX_DIRTY | ROTATION_DIRTY | POSITION_DIRTY;
+	mJointNum = 0;
+
+	setName(name);
+	if (parent)
+		parent->addChild( this );
+
+	touch();
+}
+
+//-----------------------------------------------------------------------------
+// ~LLJoint()
+// Class Destructor
+//-----------------------------------------------------------------------------
+LLJoint::~LLJoint()
+{
+	removeAllChildren();
+}
+
+
+//-----------------------------------------------------------------------------
+// setup()
+//-----------------------------------------------------------------------------
+void LLJoint::setup(const std::string &name, LLJoint *parent)
+{
+	setName(name);
+	if (parent)
+		parent->addChild( this );
+}
+
+//-----------------------------------------------------------------------------
+// touch()
+// Sets all dirty flags for all children, recursively.
+//-----------------------------------------------------------------------------
+void LLJoint::touch(U32 flags)
+{
+	if ((flags | mDirtyFlags) != mDirtyFlags)
+	{
+		sNumTouches++;
+		mDirtyFlags |= flags;
+		U32 child_flags = flags;
+		if (flags & ROTATION_DIRTY)
+		{
+			child_flags |= POSITION_DIRTY;
+		}
+		
+		for (	LLJoint *joint = mChildren.getFirstData();
+				joint != NULL;
+				joint = mChildren.getNextData() )
+		{
+			joint->touch(child_flags);
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// getRoot()
+//-----------------------------------------------------------------------------
+LLJoint *LLJoint::getRoot()
+{
+	if ( getParent() == NULL )
+	{
+		return this;
+	}
+	return getParent()->getRoot();
+}
+
+
+//-----------------------------------------------------------------------------
+// findJoint()
+//-----------------------------------------------------------------------------
+LLJoint *LLJoint::findJoint( const std::string &name )
+{
+	if (name == getName())
+		return this;
+
+	for (	LLJoint *j = mChildren.getFirstData();
+			j != NULL;
+			j = mChildren.getNextData() )
+	{
+		LLJoint *found = j->findJoint(name);
+		if (found)
+			return found;
+	}
+
+	return NULL;	
+}
+
+
+//--------------------------------------------------------------------
+// addChild()
+//--------------------------------------------------------------------
+void LLJoint::addChild(LLJoint *joint)
+{
+	if (joint->mParent)
+		joint->mParent->removeChild(joint);
+
+	mChildren.addDataAtEnd(joint);
+	joint->mXform.setParent(&mXform);
+	joint->mParent = this;	
+	joint->touch();
+}
+
+
+//--------------------------------------------------------------------
+// removeChild()
+//--------------------------------------------------------------------
+void LLJoint::removeChild(LLJoint *joint)
+{
+	this->mChildren.removeData(joint);
+	joint->mXform.setParent(NULL);
+	joint->mParent = NULL;
+	joint->touch();
+}
+
+
+//--------------------------------------------------------------------
+// removeAllChildren()
+//--------------------------------------------------------------------
+void LLJoint::removeAllChildren()
+{
+	for (	LLJoint *joint = mChildren.getFirstData();
+			joint != NULL;
+			joint = mChildren.getNextData() )
+	{
+		removeChild(joint);
+	}
+}
+
+
+//--------------------------------------------------------------------
+// getPosition()
+//--------------------------------------------------------------------
+const LLVector3& LLJoint::getPosition()
+{
+	return mXform.getPosition();
+}
+
+
+//--------------------------------------------------------------------
+// setPosition()
+//--------------------------------------------------------------------
+void LLJoint::setPosition( const LLVector3& pos )
+{
+	mXform.setPosition(pos);
+	touch(MATRIX_DIRTY | POSITION_DIRTY);
+}
+
+
+//--------------------------------------------------------------------
+// getWorldPosition()
+//--------------------------------------------------------------------
+LLVector3 LLJoint::getWorldPosition()
+{
+	updateWorldPRSParent();
+	return mXform.getWorldPosition();
+}
+
+//-----------------------------------------------------------------------------
+// getLastWorldPosition()
+//-----------------------------------------------------------------------------
+LLVector3 LLJoint::getLastWorldPosition()
+{
+	return mXform.getWorldPosition();
+}
+
+
+//--------------------------------------------------------------------
+// setWorldPosition()
+//--------------------------------------------------------------------
+void LLJoint::setWorldPosition( const LLVector3& pos )
+{
+	if (mParent == NULL)
+	{
+		this->setPosition( pos );
+		return;
+	}
+
+	LLMatrix4 temp_matrix = getWorldMatrix();
+	temp_matrix.mMatrix[VW][VX] = pos.mV[VX];
+	temp_matrix.mMatrix[VW][VY] = pos.mV[VY];
+	temp_matrix.mMatrix[VW][VZ] = pos.mV[VZ];
+
+	LLMatrix4 parentWorldMatrix = mParent->getWorldMatrix();
+	LLMatrix4 invParentWorldMatrix = parentWorldMatrix.invert();
+
+	temp_matrix *= invParentWorldMatrix;
+
+	LLVector3 localPos(	temp_matrix.mMatrix[VW][VX],
+						temp_matrix.mMatrix[VW][VY],
+						temp_matrix.mMatrix[VW][VZ] );
+
+	setPosition( localPos );
+}
+
+
+//--------------------------------------------------------------------
+// mXform.getRotation()
+//--------------------------------------------------------------------
+const LLQuaternion& LLJoint::getRotation()
+{
+	return mXform.getRotation();
+}
+
+
+//--------------------------------------------------------------------
+// setRotation()
+//--------------------------------------------------------------------
+void LLJoint::setRotation( const LLQuaternion& rot )
+{
+	if (rot.isFinite())
+	{
+		mXform.setRotation(rot);
+		touch(MATRIX_DIRTY | ROTATION_DIRTY);
+	}
+}
+
+
+//--------------------------------------------------------------------
+// getWorldRotation()
+//--------------------------------------------------------------------
+LLQuaternion LLJoint::getWorldRotation()
+{
+	updateWorldPRSParent();
+
+	return mXform.getWorldRotation();
+}
+
+//-----------------------------------------------------------------------------
+// getLastWorldRotation()
+//-----------------------------------------------------------------------------
+LLQuaternion LLJoint::getLastWorldRotation()
+{
+	return mXform.getWorldRotation();
+}
+
+//--------------------------------------------------------------------
+// setWorldRotation()
+//--------------------------------------------------------------------
+void LLJoint::setWorldRotation( const LLQuaternion& rot )
+{
+	if (mParent == NULL)
+	{
+		this->setRotation( rot );
+		return;
+	}
+
+	LLMatrix4 temp_mat(rot);
+
+	LLMatrix4 parentWorldMatrix = mParent->getWorldMatrix();
+	parentWorldMatrix.mMatrix[VW][VX] = 0;
+	parentWorldMatrix.mMatrix[VW][VY] = 0;
+	parentWorldMatrix.mMatrix[VW][VZ] = 0;
+
+	LLMatrix4 invParentWorldMatrix = parentWorldMatrix.invert();
+
+	temp_mat *= invParentWorldMatrix;
+
+	setRotation(LLQuaternion(temp_mat));
+}
+
+
+//--------------------------------------------------------------------
+// getScale()
+//--------------------------------------------------------------------
+const LLVector3& LLJoint::getScale()
+{
+	return mXform.getScale();
+}
+
+//--------------------------------------------------------------------
+// setScale()
+//--------------------------------------------------------------------
+void LLJoint::setScale( const LLVector3& scale )
+{
+	mXform.setScale(scale);
+	touch();
+}
+
+
+
+//--------------------------------------------------------------------
+// getWorldMatrix()
+//--------------------------------------------------------------------
+const LLMatrix4 &LLJoint::getWorldMatrix()
+{
+	updateWorldMatrixParent();
+
+	return mXform.getWorldMatrix();
+}
+
+
+//--------------------------------------------------------------------
+// setWorldMatrix()
+//--------------------------------------------------------------------
+void LLJoint::setWorldMatrix( const LLMatrix4& mat )
+{
+llinfos << "WARNING: LLJoint::setWorldMatrix() not correctly implemented yet" << llendl;
+	// extract global translation
+	LLVector3 trans(	mat.mMatrix[VW][VX],
+						mat.mMatrix[VW][VY],
+						mat.mMatrix[VW][VZ] );
+
+	// extract global rotation
+	LLQuaternion rot( mat );
+
+	setWorldPosition( trans );
+	setWorldRotation( rot );
+}
+
+//-----------------------------------------------------------------------------
+// updateWorldMatrixParent()
+//-----------------------------------------------------------------------------
+void LLJoint::updateWorldMatrixParent()
+{
+	if (mDirtyFlags & MATRIX_DIRTY)
+	{
+		LLJoint *parent = getParent();
+		if (parent)
+		{
+			parent->updateWorldMatrixParent();
+		}
+		updateWorldMatrix();
+	}
+}
+
+//-----------------------------------------------------------------------------
+// updateWorldPRSParent()
+//-----------------------------------------------------------------------------
+void LLJoint::updateWorldPRSParent()
+{
+	if (mDirtyFlags & (ROTATION_DIRTY | POSITION_DIRTY))
+	{
+		LLJoint *parent = getParent();
+		if (parent)
+		{
+			parent->updateWorldPRSParent();
+		}
+
+		mXform.update();
+		mDirtyFlags &= ~(ROTATION_DIRTY | POSITION_DIRTY);
+	}
+}
+
+//-----------------------------------------------------------------------------
+// updateWorldMatrixChildren()
+//-----------------------------------------------------------------------------
+void LLJoint::updateWorldMatrixChildren()
+{
+	if (mDirtyFlags & MATRIX_DIRTY)
+	{
+		updateWorldMatrix();
+	}
+	for (LLJoint *child = mChildren.getFirstData(); child; child = mChildren.getNextData())
+	{
+		child->updateWorldMatrixChildren();
+	}
+}
+
+//-----------------------------------------------------------------------------
+// updateWorldMatrix()
+//-----------------------------------------------------------------------------
+void LLJoint::updateWorldMatrix()
+{
+	if (mDirtyFlags & MATRIX_DIRTY)
+	{
+		sNumUpdates++;
+		mXform.updateMatrix(FALSE);
+		mDirtyFlags = 0x0;
+	}
+}
+
+//--------------------------------------------------------------------
+// getSkinOffset()
+//--------------------------------------------------------------------
+const LLVector3 &LLJoint::getSkinOffset()
+{
+	return mSkinOffset;
+}
+
+
+//--------------------------------------------------------------------
+// setSkinOffset()
+//--------------------------------------------------------------------
+void LLJoint::setSkinOffset( const LLVector3& offset )
+{
+	mSkinOffset = offset;
+}
+
+//-----------------------------------------------------------------------------
+// setConstraintSilhouette()
+//-----------------------------------------------------------------------------
+void LLJoint::setConstraintSilhouette(LLDynamicArray<LLVector3>& silhouette)
+{
+	S32 i;
+
+	mConstraintSilhouette.reset();
+	for (i = 0; i < silhouette.count(); i++)
+	{
+		if (i % 2 == 1)
+		{
+			// skip normals
+			continue;
+		}
+		mConstraintSilhouette[i / 2] = silhouette[i];
+	}
+	LLQuaternion inv_parent_rotation = LLQuaternion::DEFAULT;
+
+	if (getParent())
+	{
+		inv_parent_rotation = ~getParent()->getWorldRotation();
+	}
+
+	for (i = 0; i < mConstraintSilhouette.count(); i++)
+	{
+		LLVector3 vert = mConstraintSilhouette[i];
+
+		vert -= getWorldPosition();
+		vert.normVec();
+		vert = vert * inv_parent_rotation;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// clampRotation()
+//-----------------------------------------------------------------------------
+void LLJoint::clampRotation(LLQuaternion old_rot, LLQuaternion new_rot)
+{
+	LLVector3 main_axis(1.f, 0.f, 0.f);
+
+	for (LLJoint* joint = mChildren.getFirstData(); joint; joint = mChildren.getNextData())
+	{
+		if (joint->isAnimatable())
+		{
+			main_axis = joint->getPosition();
+			main_axis.normVec();
+			// only care about first animatable child
+			break;
+		}
+	}
+
+	// 2003.03.26 - This code was just using up cpu cycles. AB
+
+//	LLVector3 old_axis = main_axis * old_rot;
+//	LLVector3 new_axis = main_axis * new_rot;
+
+//	for (S32 i = 0; i < mConstraintSilhouette.count() - 1; i++)
+//	{
+//		LLVector3 vert1 = mConstraintSilhouette[i];
+//		LLVector3 vert2 = mConstraintSilhouette[i + 1];
+
+		// figure out how to clamp rotation to line on 3-sphere
+
+//	}
+}
+
+// End