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game/shared/SpriteTrail.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef SPRITETRAIL_H
+#define SPRITETRAIL_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "Sprite.h"
+
+#if defined( CLIENT_DLL )
+#define CSpriteTrail C_SpriteTrail
+#endif
+
+
+//-----------------------------------------------------------------------------
+// Sprite trail
+//-----------------------------------------------------------------------------
+struct TrailPoint_t
+{
+	DECLARE_SIMPLE_DATADESC();
+
+	Vector	m_vecScreenPos;
+	float	m_flDieTime;
+	float	m_flTexCoord;
+	float	m_flWidthVariance;
+};
+
+class CSpriteTrail : public CSprite
+{
+	DECLARE_CLASS( CSpriteTrail, CSprite );
+	DECLARE_DATADESC();
+	DECLARE_NETWORKCLASS();
+	DECLARE_PREDICTABLE();
+
+public:
+	CSpriteTrail( void );
+
+	// Sets parameters of the sprite trail
+	void SetLifeTime( float time );
+	void SetStartWidth( float flStartWidth );
+	void SetEndWidth( float flEndWidth );
+	void SetStartWidthVariance( float flStartWidthVariance );
+	void SetTextureResolution( float flTexelsPerInch );
+	void SetMinFadeLength( float flMinFadeLength );
+	void SetSkybox( const Vector &vecSkyboxOrigin, float flSkyboxScale );
+
+	// Is the trail in the skybox?
+	bool IsInSkybox() const;
+	void Spawn( void );
+	void Precache( void );
+	void SetTransmit( bool bTransmit = true ) { m_bDrawForMoveParent = bTransmit; }
+
+#if defined( CLIENT_DLL ) 
+	// Client only code
+	virtual int DrawModel( int flags );
+	virtual const Vector &GetRenderOrigin( void );
+	virtual const QAngle &GetRenderAngles( void );
+
+	// On data update
+	virtual void OnPreDataChanged( DataUpdateType_t updateType );
+	virtual void OnDataChanged( DataUpdateType_t updateType );
+	virtual void GetRenderBounds( Vector& mins, Vector& maxs );
+	virtual void ClientThink();
+
+	virtual bool ValidateEntityAttachedToPlayer( bool &bShouldRetry );
+
+#else
+	// Server only code
+
+	virtual int ShouldTransmit( const CCheckTransmitInfo *pInfo );
+	static CSpriteTrail *SpriteTrailCreate( const char *pSpriteName, const Vector &origin, bool animate );
+
+#endif
+
+private:
+#if defined( CLIENT_DLL )
+	enum
+	{
+		// NOTE: # of points max must be a power of two!
+		MAX_SPRITE_TRAIL_POINTS	= 256,
+		MAX_SPRITE_TRAIL_MASK = MAX_SPRITE_TRAIL_POINTS - 1,
+	};
+
+	TrailPoint_t *GetTrailPoint( int n );
+	void	UpdateTrail( void );
+	void	ComputeScreenPosition( Vector *pScreenPos );
+	void	ConvertSkybox();
+	void	UpdateBoundingBox( void );
+
+	TrailPoint_t	m_vecSteps[MAX_SPRITE_TRAIL_POINTS];
+	int	m_nFirstStep;
+	int m_nStepCount;
+	float m_flUpdateTime;
+	Vector m_vecPrevSkyboxOrigin;
+	float m_flPrevSkyboxScale;
+	Vector m_vecRenderMins;
+	Vector m_vecRenderMaxs;
+#endif
+
+	CNetworkVar( float, m_flLifeTime );	// Amount of time before a new trail segment fades away
+	CNetworkVar( float, m_flStartWidth );	// The starting scale
+	CNetworkVar( float, m_flEndWidth );	// The ending scale
+	CNetworkVar( float, m_flStartWidthVariance );	// The starting scale
+	CNetworkVar( float, m_flTextureRes );	// Texture resolution along the trail
+	CNetworkVar( float, m_flMinFadeLength );	// The end of the trail must fade out for this many units
+	CNetworkVector( m_vecSkyboxOrigin );	// What's our skybox origin?
+	CNetworkVar( float, m_flSkyboxScale );	// What's our skybox scale?
+
+	string_t m_iszSpriteName;
+	bool	m_bAnimate;
+	bool	m_bDrawForMoveParent;
+
+#if defined( CLIENT_DLL )
+public:
+	void SetUpdateTime(float setTo){ m_flUpdateTime = setTo; }
+#endif
+};
+
+#endif // SPRITETRAIL_H