// protocol.h -- communications protocols enum {	PROTO_NQ,	PROTO_RMQ,	PROTO_NUM,}; // these are the only ones supported with RMQ atmenum {	PF_RMQ_ANGLE_INT16 = 1<<1,	PF_RMQ_COORD_INT32 = 1<<7,}; enum {	DEFAULT_ALPHA,	ZERO_ALPHA,}; #define defalpha(a) ((a) == DEFAULT_ALPHA || (a) == 0xff)#define zeroalpha(a) (!defalpha(a) && (a) <= ZERO_ALPHA)#define f2alpha(f) ((f) == 0.0 ? DEFAULT_ALPHA : clamp((f)*254+1, 1, 255))#define alpha2f(a) (zeroalpha(a) ? 0.0 : (float)(a)/255.0) typedef struct protocol_t protocol_t; struct protocol_t {	int version;	int flags;	char *name; 	// flexible limits - messages change	u32int fl_large_entity;	int large_entity;	u32int fl_large_channel;	int large_channel;	u32int fl_large_sound;	int large_sound;	u32int fl_large_frame;	int large_frame;	u32int fl_large_model;	int large_model;	u32int fl_large_weaponframe;	u32int fl_large_weaponmodel;	u32int fl_large_baseline_model;	u32int fl_large_baseline_frame; 	u32int fl_alpha;	u32int fl_baseline_alpha;	u32int fl_weapon_alpha; 	u32int fl_baseline_effects; /* FIXME(sigrid): this is absolutely made up and NOT a standard anywhere */ 	// absolute limits for the protocol	int limit_entity;	int limit_channel;	int limit_model;	int limit_frame;	int limit_sound; 	void (*MSG_WriteCoord)(sizebuf_t *sb, float f);	void (*MSG_WriteAngle)(sizebuf_t *sb, float f);	float (*MSG_ReadCoord)(void);	float (*MSG_ReadAngle)(void); 	void (*MSG_WriteProtocolInfo)(sizebuf_t *sb, protocol_t *proto);	void (*MSG_ReadProtocolInfo)(protocol_t *proto);}; extern protocol_t protos[PROTO_NUM]; // defaults for clientinfo messages#define	DEFAULT_VIEWHEIGHT	22 // if the high bit of the servercmd is set, the low bits are fast update flags:enum {	// game types sent by serverinfo	// these determine which intermission screen plays	GAME_COOP = 0,	GAME_DEATHMATCH, 	U_MOREBITS = 1<<0,	U_ORIGIN1 = 1<<1,	U_ORIGIN2 = 1<<2,	U_ORIGIN3 = 1<<3,	U_ANGLE2 = 1<<4,	U_NOLERP = 1<<5,		// don't interpolate movement	U_FRAME = 1<<6,	U_SIGNAL = 1<<7,		// just differentiates from other updates	// svc_update can pass all of the fast update bits, plus more	U_ANGLE1 = 1<<8,	U_ANGLE3 = 1<<9,	U_MODEL = 1<<10,	U_COLORMAP = 1<<11,	U_SKIN = 1<<12,	U_EFFECTS = 1<<13,	U_LONGENTITY = 1<<14,	U_MOREBITS2 = 1<<15,	// some of the bits here (1<<16…1<<22) are reserved by specific protocols	U_MOREBITS3 = 1<<23, 	SU_VIEWHEIGHT = 1<<0,	SU_IDEALPITCH = 1<<1,	SU_PUNCH1 = 1<<2,	SU_PUNCH2 = 1<<3,	SU_PUNCH3 = 1<<4,	SU_VELOCITY1 = 1<<5,	SU_VELOCITY2 = 1<<6,	SU_VELOCITY3 = 1<<7,	//SU_AIMENT = 1<<8,  AVAILABLE BIT	SU_ITEMS = 1<<9,	SU_ONGROUND = 1<<10,		// no data follows, the bit is it	SU_INWATER = 1<<11,		// no data follows, the bit is it	SU_WEAPONFRAME = 1<<12,	SU_ARMOR = 1<<13,	SU_WEAPON = 1<<14,	SU_MOREBITS = 1<<15,	// some of the bits here (1<<16…1<<22) are reserved by specific protocols	SU_MOREBITS2 = 1<<23, 	// a sound with no channel is a local only sound	SND_VOLUME = 1<<0,		// a byte	SND_ATTENUATION = 1<<1,		// a byte	SND_LOOPING = 1<<2,		// a long 	// server to client	svc_bad = 0,	svc_nop,	svc_disconnect,	svc_updatestat, // [byte] [long]	svc_version, // [long] server version	svc_setview, // [short] entity number	svc_sound, // <see code>	svc_time, // [float] server time	svc_print, // [string] null terminated string	svc_stufftext, // [string] stuffed into client's console buffer								// the string should be \n terminated	svc_setangle, // [angle3] set the view angle to this absolute value	svc_serverinfo, // [long] version						// [string] signon string						// [string]..[0]model cache						// [string]...[0]sounds cache	svc_lightstyle, // [byte] [string]	svc_updatename, // [byte] [string]	svc_updatefrags, // [byte] [short]	svc_clientdata, // <shortbits + data>	svc_stopsound, // <see code>	svc_updatecolors, // [byte] [byte]	svc_particle, // [vec3] <variable>	svc_damage,	svc_spawnstatic,	svc_spawnbinary, // unused	svc_spawnbaseline,	svc_temp_entity,	svc_setpause, // [byte] on / off	svc_signonnum, // [byte]  used for the signon sequence	svc_centerprint, // [string] to put in center of the screen	svc_killedmonster,	svc_foundsecret,	svc_spawnstaticsound, // [coord3] [byte] samp [byte] vol [byte] aten	svc_intermission, // [string] music	svc_finale, // [string] music [string] text	svc_cdtrack, // [byte] track [byte] looptrack	svc_sellscreen,	svc_cutscene, 	// non-NQ stuff	svc_spawnbaseline2 = 42,	svc_spawnstatic2,	svc_spawnstaticsound2, 	// Nehahra	svc_showlmp = 35, // [string] iconlabel [string] lmpfile [byte] x [byte] y	svc_hidelmp, // [string] iconlabel	svc_skybox, // [string] skyname	svc_skyboxsize = 50, // [coord] size	svc_fog, // [byte] enabled; if enabled: [float] density [byte] R [byte] G [byte] B 	// client to server	clc_bad = 0,	clc_nop,	clc_disconnect,	clc_move, // [usercmd_t]	clc_stringcmd, // [string] message 	// temp entity events	TE_SPIKE = 0,	TE_SUPERSPIKE,	TE_GUNSHOT,	TE_EXPLOSION,	TE_TAREXPLOSION,	TE_LIGHTNING1,	TE_LIGHTNING2,	TE_WIZSPIKE,	TE_KNIGHTSPIKE,	TE_LIGHTNING3,	TE_LAVASPLASH,	TE_TELEPORT,	TE_EXPLOSION2,	TE_BEAM,};