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diff --git a/hammer/mapanimator.cpp b/hammer/mapanimator.cpp
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+++ b/hammer/mapanimator.cpp
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#include "stdafx.h"
+#include "GlobalFunctions.h"
+#include "fgdlib/HelperInfo.h"
+#include "MapAnimator.h"
+#include "MapDoc.h"
+#include "MapEntity.h"
+#include "MapWorld.h"
+#include "KeyFrame/KeyFrame.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+
+IMPLEMENT_MAPCLASS( CMapAnimator );
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Factory function. Used for creating a CMapKeyFrame from a set
+//			of string parameters from the FGD file.
+// Input  : *pInfo - Pointer to helper info class which gives us information
+//				about how to create the class.
+// Output : Returns a pointer to the class, NULL if an error occurs.
+//-----------------------------------------------------------------------------
+CMapClass *CMapAnimator::CreateMapAnimator(CHelperInfo *pHelperInfo, CMapEntity *pParent)
+{
+	return(new CMapAnimator);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CMapAnimator::CMapAnimator()
+{
+	m_CoordFrame.Identity();
+	m_bCurrentlyAnimating = false;
+
+	m_pCurrentKeyFrame = this;
+
+	m_iPositionInterpolator = m_iRotationInterpolator = m_iTimeModifier = 0;
+	m_nKeysChanged = 0;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+CMapAnimator::~CMapAnimator()
+{
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : CMapClass *
+//-----------------------------------------------------------------------------
+CMapClass *CMapAnimator::Copy(bool bUpdateDependencies)
+{
+	CMapAnimator *pNew = new CMapAnimator;
+	pNew->CopyFrom(this, bUpdateDependencies);
+	return pNew;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pObj - 
+// Output : CMapClass
+//-----------------------------------------------------------------------------
+CMapClass *CMapAnimator::CopyFrom(CMapClass *pObj, bool bUpdateDependencies)
+{
+	CMapKeyFrame::CopyFrom(pObj, bUpdateDependencies);
+	CMapAnimator *pFrom = dynamic_cast<CMapAnimator*>( pObj );
+	Assert( pFrom != NULL );
+
+	memcpy( m_CoordFrame.Base(), pFrom->m_CoordFrame.Base(), sizeof(m_CoordFrame) );
+	m_bCurrentlyAnimating = false;
+	m_pCurrentKeyFrame = NULL;	// keyframe it's currently at
+
+	m_iTimeModifier = pFrom->m_iTimeModifier;
+	m_iPositionInterpolator = pFrom->m_iPositionInterpolator;
+	m_iRotationInterpolator = pFrom->m_iRotationInterpolator;
+
+	return this;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns a coordinate frame to render in, if the entity is animating
+// Input  : matrix - 
+// Output : returns true if a new matrix is returned, false if it is invalid
+//-----------------------------------------------------------------------------
+bool CMapAnimator::GetTransformMatrix( VMatrix& matrix )
+{
+	// are we currently animating?
+	if ( m_bCurrentlyAnimating )
+	{
+		matrix = m_CoordFrame;
+		return true;
+	}
+
+	return false;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Notifies that the entity this is attached to has had a key change
+// Input  : key - 
+//			value - 
+//-----------------------------------------------------------------------------
+void CMapAnimator::OnParentKeyChanged( const char* key, const char* value )
+{
+	if ( !stricmp(key, "TimeModifier") )
+	{
+		m_iTimeModifier = atoi( value );
+	}
+	else if ( !stricmp(key, "PositionInterpolator") )
+	{
+		m_iPositionInterpolator = atoi( value );
+
+		// HACK: Force everything in the path to update. Better to follow our path and update only it.
+		UpdateAllDependencies(this);
+	}
+	else if ( !stricmp(key, "RotationInterpolator") )
+	{
+		m_iRotationInterpolator = atoi( value );
+	}
+
+	m_nKeysChanged++;
+
+	CMapKeyFrame::OnParentKeyChanged( key, value );
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Gets the current and previous keyframes for a given time.
+// Input  : time - time into sequence
+//			pKeyFrame - receives current keyframe pointer
+//			pPrevKeyFrame - receives previous keyframe pointer
+// Output : time remaining after the thing has reached this key
+//-----------------------------------------------------------------------------
+float CMapAnimator::GetKeyFramesAtTime( float time, CMapKeyFrame *&pKeyFrame, CMapKeyFrame *&pPrevKeyFrame )
+{
+	pKeyFrame = this; 
+	pPrevKeyFrame = this;
+
+	float outTime = time;
+
+	while ( pKeyFrame )
+	{
+		if ( pKeyFrame->MoveTime() > outTime )
+		{
+			break;
+		}
+
+		// make sure this anim has enough time
+		if ( pKeyFrame->MoveTime() < 0.01f )
+		{
+			outTime = 0.0f;
+			break;
+		}
+
+		outTime -= pKeyFrame->MoveTime();
+		
+		pPrevKeyFrame = pKeyFrame;
+		pKeyFrame = pKeyFrame->NextKeyFrame();
+	}
+
+	return outTime;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: creates a new keyframe at the specified time
+// Input  : time - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+CMapEntity *CMapAnimator::CreateNewKeyFrame( float time )
+{
+	// work out where we are in the animation
+	CMapKeyFrame *key;
+	CMapKeyFrame *pPrevKey;
+	float partialTime = GetKeyFramesAtTime( time, key, pPrevKey );
+
+	CMapEntity *pCurrentEnt = dynamic_cast<CMapEntity*>( key->m_pParent );
+
+	// check to see if we're direction on a key frame
+	Vector posOffset( 0, 0, 0 );
+	if ( partialTime == 0 )
+	{
+		// create this new key frame slightly after the current one, and offset
+		posOffset[0] = 64;
+	}
+
+	// get our orientation and position at this time
+	Vector vOrigin;
+	QAngle angles;
+	Quaternion qAngles;
+	GetAnimationAtTime( key, pPrevKey, partialTime, vOrigin, qAngles, m_iPositionInterpolator, m_iRotationInterpolator );
+	QuaternionAngles( qAngles, angles );
+
+	// create the new map entity
+	CMapEntity *pNewEntity = new CMapEntity;
+
+	Vector newPos;
+	VectorAdd( vOrigin, posOffset, newPos );
+	pNewEntity->SetPlaceholder( TRUE );
+	pNewEntity->SetOrigin( newPos );
+	pNewEntity->SetClass( "keyframe_track" );
+
+	char buf[128];
+	sprintf( buf, "%f %f %f", angles[0], angles[1], angles[2] );
+	pNewEntity->SetKeyValue( "angles", buf );
+
+	// link it into the keyframe list
+
+	// take over this existing next keyframe pointer
+	const char *nextKeyName = pCurrentEnt->GetKeyValue( "NextKey" );
+	if ( nextKeyName )
+	{
+		pNewEntity->SetKeyValue( "NextKey", nextKeyName );
+	}
+		
+	// create a new unique name for this ent
+	char newName[128];
+	const char *oldName = pCurrentEnt->GetKeyValue( "targetname" );
+	if ( !oldName || oldName[0] == 0 )
+		oldName = "keyframe";
+
+	CMapWorld *pWorld = GetWorldObject( this );
+	if ( pWorld )
+	{
+		pWorld->GenerateNewTargetname( oldName, newName, sizeof( newName ), true, NULL );
+		pNewEntity->SetKeyValue( "targetname", newName );
+
+		// point the current entity at the newly created one
+		pCurrentEnt->SetKeyValue( "NextKey", newName );
+
+		// copy any relevant values
+		const char *keyValue = pCurrentEnt->GetKeyValue( "parentname" );
+		if ( keyValue )
+			pNewEntity->SetKeyValue( "parentname", keyValue );
+
+		keyValue = pCurrentEnt->GetKeyValue( "MoveSpeed" );
+		if ( keyValue )
+			pNewEntity->SetKeyValue( "MoveSpeed", keyValue );
+	}
+	
+	return(pNewEntity);
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: stops CMapKeyframe from doing it's auto-connect behavior when cloning
+// Input  : pClone - 
+//-----------------------------------------------------------------------------
+void CMapAnimator::OnClone( CMapClass *pClone, CMapWorld *pWorld, const CMapObjectList &OriginalList, CMapObjectList &NewList )
+{
+	CMapClass::OnClone( pClone, pWorld, OriginalList, NewList );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: calculates the position of an animating object at a given time in
+//			it's animation sequence
+// Input  : animTime - 
+//			*newOrigin - 
+//			*newAngles - 
+//-----------------------------------------------------------------------------
+void CMapAnimator::GetAnimationAtTime( float animTime, Vector& newOrigin, Quaternion &newAngles )
+{
+	// setup the animation, given the time
+
+	// get our new position & orientation
+	float newTime, totalAnimTime = GetRemainingTime();
+	animTime /= totalAnimTime;
+
+	// don't use time modifier until we work out what we're going to do with it
+	//Motion_CalculateModifiedTime( animTime, m_iTimeModifier, &newTime );
+	newTime = animTime;
+
+	// find out where we are in the keyframe sequence based on the time
+	CMapKeyFrame *pPrevKeyFrame;
+	float posTime = GetKeyFramesAtTime( newTime * totalAnimTime, m_pCurrentKeyFrame, pPrevKeyFrame );
+
+	// find the position from that keyframe
+	GetAnimationAtTime( m_pCurrentKeyFrame, pPrevKeyFrame, posTime, newOrigin, newAngles, m_iPositionInterpolator, m_iRotationInterpolator );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: calculates the position of the animating object between two keyframes
+// Input  : currentKey - 
+//			pPrevKey - 
+//			partialTime - 
+//			newOrigin - 
+//			newAngles - 
+//			posInterpolator - 
+//			rotInterpolator - 
+//-----------------------------------------------------------------------------
+void CMapAnimator::GetAnimationAtTime( CMapKeyFrame *currentKey, CMapKeyFrame *pPrevKey, float partialTime, Vector& newOrigin, Quaternion &newAngles, int posInterpolator, int rotInterpolator )
+{
+	// calculate the proportion of time to be spent on this keyframe
+	float animTime;
+	if ( currentKey->MoveTime() < 0.01 )
+	{
+		animTime = 1.0f;
+	}
+	else
+	{
+		animTime = partialTime / currentKey->MoveTime();
+	}
+
+	Assert( animTime >= 0.0f && animTime <= 1.0f );
+
+	IPositionInterpolator *pInterp = currentKey->SetupPositionInterpolator( posInterpolator );
+
+	// setup interpolation keyframes
+	Vector keyOrigin;
+	Quaternion keyAngles;
+	pPrevKey->GetOrigin( keyOrigin );
+	pPrevKey->GetQuatAngles( keyAngles );
+	pInterp->SetKeyPosition( -1, keyOrigin );
+	Motion_SetKeyAngles  ( -1, keyAngles );
+
+	currentKey->GetOrigin( keyOrigin );
+	currentKey->GetQuatAngles( keyAngles );
+	pInterp->SetKeyPosition( 0, keyOrigin );
+	Motion_SetKeyAngles  ( 0, keyAngles );
+
+	currentKey->NextKeyFrame()->GetOrigin( keyOrigin );
+	currentKey->NextKeyFrame()->GetQuatAngles( keyAngles );
+	pInterp->SetKeyPosition( 1, keyOrigin );
+	Motion_SetKeyAngles  ( 1, keyAngles );
+
+	currentKey->NextKeyFrame()->NextKeyFrame()->GetOrigin( keyOrigin );
+	currentKey->NextKeyFrame()->NextKeyFrame()->GetQuatAngles( keyAngles );
+	pInterp->SetKeyPosition( 2, keyOrigin );
+	Motion_SetKeyAngles  ( 2, keyAngles );
+
+	// get our new interpolated position
+	// HACK HACK - Hey Brian, look here!!!!
+	Vector hackOrigin;
+	pInterp->InterpolatePosition( animTime, hackOrigin );
+
+	newOrigin[0] = hackOrigin[0];
+	newOrigin[1] = hackOrigin[1];
+	newOrigin[2] = hackOrigin[2];
+	Motion_InterpolateRotation( animTime, rotInterpolator, newAngles );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Builds the animation transformation matrix for the entity if it's animating
+//-----------------------------------------------------------------------------
+void CMapAnimator::UpdateAnimation( float animTime )
+{
+	// only animate if the doc is animating and we're selected
+	if ( !CMapDoc::GetActiveMapDoc()->IsAnimating() || !m_pParent->IsSelected() )
+	{
+		// we're not animating
+		m_bCurrentlyAnimating = false;
+		return;
+	}
+
+	m_bCurrentlyAnimating = true;
+
+	Vector newOrigin;
+	Quaternion newAngles;
+	GetAnimationAtTime( animTime, newOrigin, newAngles );
+
+	VMatrix mat, tmpMat;
+	Vector ourOrigin;
+	GetOrigin( ourOrigin );
+
+	// build us a matrix
+	// T(newOrigin)R(angle)T(-ourOrigin)
+	m_CoordFrame.Identity() ;
+
+	// transform back to the origin
+	for ( int i = 0; i < 3; i++ )
+	{
+		m_CoordFrame[i][3] = -ourOrigin[i];
+	}
+	
+	// Apply interpolated Rotation
+	mat.Identity();
+	QuaternionMatrix( newAngles, const_cast< matrix3x4_t & > ( mat.As3x4() ) );
+	m_CoordFrame = m_CoordFrame * mat;
+	
+	// transform back to our new position
+	mat.Identity();
+	for ( int i = 0; i < 3; i++ )
+	{
+		mat[i][3] = newOrigin[i];
+	}
+
+	m_CoordFrame = m_CoordFrame * mat;
+	
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Rebuilds the line path between keyframe entities
+//			samples the interpolator function to get an approximation of the curve
+//-----------------------------------------------------------------------------
+void CMapAnimator::RebuildPath( void )
+{
+	CMapWorld *pWorld = GetWorldObject( this );
+	if ( !pWorld )
+	{
+		// Sometimes the object isn't linked back into the world yet when RebuildPath() 
+		// is called... we will be get called again when needed, but may cause an incorrect
+		// (linear-only) path to get drawn temporarily.
+		return;
+	}
+
+	//
+	// Build the path forward from the head. Keep a list of nodes we've visited to
+	// use in detecting circularities.
+	//
+	CMapObjectList VisitedList;
+	CMapKeyFrame *pCurKey = this;
+	while ( pCurKey != NULL )
+	{
+		VisitedList.AddToTail( pCurKey );
+
+		//
+		// Attach ourselves as this keyframe's animator.
+		//
+		pCurKey->SetAnimator( this );
+
+		//
+		// Get the entity parent of this keyframe so we can query keyvalues.
+		//
+		CMapEntity *pCurEnt = dynamic_cast<CMapEntity *>( pCurKey->GetParent() );
+		if ( !pCurEnt )
+		{
+			return;
+		}
+
+		//
+		// Find the next keyframe in the path.
+		//
+		CMapEntity *pNextEnt = pWorld->FindEntityByName( pCurEnt->GetKeyValue( "NextKey" ) );
+		CMapKeyFrame *pNextKey = NULL;
+
+		if ( pNextEnt )
+		{
+			pNextKey = pNextEnt->GetChildOfType( ( CMapKeyFrame * )NULL );
+			pCurKey->SetNextKeyFrame(pNextKey);
+		}
+		else
+		{
+			pCurKey->SetNextKeyFrame( NULL );
+		}
+
+		pCurKey = pNextKey;
+
+		//
+		// If we detect a circularity, stop.
+		//
+		if ( VisitedList.Find( pCurKey ) != -1 )
+		{
+			break;
+		}
+	}
+
+	//
+	// Now traverse the path again building the spline points, once again checking
+	// the visited list for circularities.
+	//
+	VisitedList.RemoveAll();
+	pCurKey = this;
+	CMapKeyFrame *pPrevKey = this;
+	while ( pCurKey != NULL )
+	{
+		VisitedList.AddToTail( pCurKey );
+
+		pCurKey->BuildPathSegment(pPrevKey);
+
+		pPrevKey = pCurKey;
+		pCurKey = pCurKey->m_pNextKeyFrame;
+
+		//
+		// If we detect a circularity, stop.
+		//
+		if ( VisitedList.Find( pCurKey ) != -1 )
+		{
+			break;
+		}
+	}
+}
+