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diff --git a/engine/cl_demosmootherpanel.h b/engine/cl_demosmootherpanel.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef CL_DEMOSMOOTHERPANEL_H
+#define CL_DEMOSMOOTHERPANEL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+//========= Copyright � 1996-2002, Valve LLC, All rights reserved. ============
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================
+#include <vgui_controls/Frame.h>
+
+namespace vgui
+{
+class Button;
+class Label;
+class ListPanel;
+class IScheme;
+};
+
+#include "demofile/demoformat.h"
+#include "demofile.h"
+
+struct demodirectory_t;
+class CSmoothingTypeButton;
+class CFixEdgeButton;
+
+typedef float (*EASEFUNC)( float t );
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+class CDemoSmootherPanel : public vgui::Frame
+{
+	DECLARE_CLASS_SIMPLE( CDemoSmootherPanel, vgui::Frame );
+
+public:
+	CDemoSmootherPanel( vgui::Panel *parent );
+	~CDemoSmootherPanel();
+
+	virtual void OnTick();
+
+	// Command issued
+	virtual void OnCommand(const char *command);
+
+	void		OnVDMChanged( void );
+
+	void		OnRefresh();
+
+	virtual bool		OverrideView( democmdinfo_t& info, int tick );
+
+	virtual void	ApplySchemeSettings( vgui::IScheme *pScheme );
+
+	virtual void	DrawDebuggingInfo(  int frame, float elapsed );
+
+
+protected:
+
+	bool		CanEdit();
+
+	void		Reset( void );
+
+	demosmoothing_t *GetCurrent( void );
+
+	void		DrawSmoothingSample( bool original, bool processed, int samplenumber, demosmoothing_t *sample, demosmoothing_t *next );
+	void		DrawTargetSpline( void );
+	void		DrawKeySpline( void );
+	int			GetTickForFrame( int frame );
+	int			GetFrameForTick( int tick );
+	bool		GetInterpolatedViewPoint( Vector& origin, QAngle& angles );
+	bool		GetInterpolatedOriginAndAngles( bool readonly, Vector& origin, QAngle& angles );
+
+	void		DrawLegend( int startframe, int endframe );
+
+	void		OnRevert();
+	void		OnPreview( bool original );
+	void		OnSave();
+	void		OnReload();
+	void		OnSelect();
+	void		OnTogglePause();
+	void		OnStep( bool forward );
+	void		OnGotoFrame();
+
+	void		OnToggleKeyFrame( void );
+	void		OnToggleLookTarget( void );
+
+	void		OnNextKey();
+	void		OnPrevKey();
+	void		OnNextTarget();
+	void		OnPrevTarget();
+
+	void		OnRevertPoint( void );
+
+	void		PopulateMenuList();
+	int			GetStartFrame();
+	int			GetEndFrame();
+
+	void		OnSaveKey();
+	void		OnSetView();
+
+	void		OnSmoothEdges( bool left, bool right );
+
+	void		PerformLinearInterpolatedAngleSmoothing( int startframe, int endframe );
+
+	void		OnSmoothSelectionAngles( void );
+	void		OnSmoothSelectionOrigin( void );
+	void		OnLinearInterpolateAnglesBasedOnEndpoints( void );
+	void		OnLinearInterpolateOriginBasedOnEndpoints( void );
+	void		OnSplineSampleOrigin( void );
+	void		OnSplineSampleAngles( void );
+	void		OnLookAtPoints( bool spline );
+	void		OnSetKeys(float interval);
+
+	void		OnOriginEaseCurve( EASEFUNC easefunc );
+
+	void		SetLastFrame( bool jumptotarget, int frame );
+
+	void		AddSamplePoints( bool usetarget, bool includeboundaries, CUtlVector< demosmoothing_t * >& points, int start, int end );
+	demosmoothing_t *GetBoundedSample(  CUtlVector< demosmoothing_t * >& points, int sample );
+	void		FindSpanningPoints( int tick, CUtlVector< demosmoothing_t * >& points, int& prev, int& next );
+
+	// Undo/Redo
+	void				Undo( void );
+	void				Redo( void );
+
+	// Do push before changes
+	void				PushUndo( const char *description );
+	// Do this push after changes, must match pushundo 1for1
+	void				PushRedo( const char *description );
+
+	void				WipeUndo( void );
+	void				WipeRedo( void );
+
+	const char			*GetUndoDescription( void );
+	const char			*GetRedoDescription( void );
+
+	bool				CanUndo( void );
+	bool				CanRedo( void );
+
+	void				ParseSmoothingInfo( CDemoFile &demoFile, CSmoothingContext& smoothing );
+	void				LoadSmoothingInfo( const char *filename, CSmoothingContext& smoothing );
+	void				ClearSmoothingInfo( CSmoothingContext& smoothing );
+	void				SaveSmoothingInfo( char const *filename, CSmoothingContext& smoothing );
+
+	CSmoothingTypeButton	*m_pType;
+
+	vgui::Button	*m_pRevert;
+	vgui::Button	*m_pOK;
+	vgui::Button	*m_pCancel;
+
+	vgui::Button	*m_pSave;
+	vgui::Button	*m_pReloadFromDisk;
+
+	vgui::TextEntry		*m_pStartFrame;
+	vgui::TextEntry		*m_pEndFrame;
+
+	vgui::Button		*m_pPreviewOriginal;
+	vgui::Button		*m_pPreviewProcessed;
+
+	vgui::CheckButton	*m_pBackOff;
+
+	vgui::Label			*m_pSelectionInfo;
+	vgui::CheckButton	*m_pShowAllSamples;
+	vgui::Button		*m_pSelectSamples;
+
+	vgui::Button		*m_pPauseResume;
+	vgui::Button		*m_pStepForward;
+	vgui::Button		*m_pStepBackward;
+
+	vgui::CheckButton	*m_pHideLegend;
+
+	vgui::CheckButton	*m_pHideOriginal;
+	vgui::CheckButton	*m_pHideProcessed;
+
+	vgui::Button		*m_pToggleKeyFrame;
+	vgui::Button		*m_pToggleLookTarget;
+	vgui::Button		*m_pRevertPoint;
+
+	vgui::Button		*m_pMoveCameraToPoint;
+
+	vgui::Button		*m_pUndo;
+	vgui::Button		*m_pRedo;
+
+	vgui::Button		*m_pNextKey;
+	vgui::Button		*m_pPrevKey;
+	vgui::Button		*m_pNextTarget;
+	vgui::Button		*m_pPrevTarget;
+
+	CFixEdgeButton		*m_pFixEdges;
+	vgui::TextEntry		*m_pFixEdgeFrames;
+
+	vgui::Button		*m_pProcessKey;
+
+	vgui::TextEntry		*m_pGotoFrame;
+	vgui::Button		*m_pGoto;
+
+	bool				m_bHasSelection;
+	int					m_nSelection[2];
+	int					m_iSelectionTicksSpan;
+
+	bool				m_bPreviewing;
+	bool				m_bPreviewOriginal;
+	int					m_iPreviewStartTick;
+	float				m_fPreviewCurrentTime;
+	int					m_nPreviewLastFrame;
+	bool				m_bPreviewPaused;
+
+	CSmoothingContext	m_Smoothing;
+
+	bool				m_bInputActive;
+	int					m_nOldCursor[2];
+
+
+	struct DemoSmoothUndo
+	{
+		CSmoothingContext *undo;
+		CSmoothingContext *redo;
+		char		 *udescription;
+		char		 *rdescription;
+	};
+
+	CUtlVector< DemoSmoothUndo * >	m_UndoStack;
+	int					m_nUndoLevel;
+	bool				m_bRedoPending;
+
+	bool				m_bDirty;
+
+	Vector				m_vecEyeOffset;
+};
+
+#endif // CL_DEMOSMOOTHERPANEL_H