//========= Copyright © 1996-2005, Valve Corporation, All rights reserved. ============//
//
// Purpose: Network data for screen shake and screen fade.
//
// $NoKeywords: $
//=============================================================================//

#ifndef SHAKE_H
#define SHAKE_H
#ifdef _WIN32
#pragma once
#endif


//
// Commands for the screen shake effect.
//

struct ScreenShake_t
{
	int		command;
	float	amplitude;
	float	frequency;
	float	duration;
};

enum ShakeCommand_t
{
	SHAKE_START = 0,	// Starts the screen shake for all players within the radius.
	SHAKE_STOP,			// Stops the screen shake for all players within the radius.
	SHAKE_AMPLITUDE,	// Modifies the amplitude of an active screen shake for all players within the radius.
	SHAKE_FREQUENCY,	// Modifies the frequency of an active screen shake for all players within the radius.
};


//
// Screen shake message.
//
extern int gmsgShake;

// Fade in/out
extern int gmsgFade;

#define FFADE_IN			0x0001		// Just here so we don't pass 0 into the function
#define FFADE_OUT			0x0002		// Fade out (not in)
#define FFADE_MODULATE		0x0004		// Modulate (don't blend)
#define FFADE_STAYOUT		0x0008		// ignores the duration, stays faded out until new ScreenFade message received
#define FFADE_PURGE			0x0010		// Purges all other fades, replacing them with this one

#define SCREENFADE_FRACBITS		9		// which leaves 16-this for the integer part
// This structure is sent over the net to describe a screen fade event
struct ScreenFade_t
{
	unsigned short 	duration;		// FIXED 16 bit, with SCREENFADE_FRACBITS fractional, seconds duration
	unsigned short 	holdTime;		// FIXED 16 bit, with SCREENFADE_FRACBITS fractional, seconds duration until reset (fade & hold)
	short			fadeFlags;		// flags
	byte			r, g, b, a;		// fade to color ( max alpha )
};


#endif // SHAKE_H
