cl_parse.c

quake1 dos源代码最新版本

/*
Copyright (C) 1996-1997 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// cl_parse.c  -- parse a message received from the server

#include "quakedef.h"

char *svc_strings[] =
{
	"svc_bad",
	"svc_nop",
	"svc_disconnect",
	"svc_updatestat",
	"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",		// [vec3] set the view angle to this absolute value

	"svc_serverinfo",		// [long] version
						// [string] signon string
						// [string]..[0]model cache [string]...[0]sounds cache
						// [string]..[0]item 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",			// [byte] impact [byte] blood [vec3] from

	"svc_spawnstatic",
	"OBSOLETE svc_spawnbinary",
	"svc_spawnbaseline",

	"svc_temp_entity",		// <variable>
	"svc_setpause",
	"svc_signonnum",
	"svc_centerprint",
	"svc_killedmonster",
	"svc_foundsecret",
	"svc_spawnstaticsound",
	"svc_intermission",
	"svc_finale",			// [string] music [string] text
	"svc_cdtrack",			// [byte] track [byte] looptrack
	"svc_sellscreen",
	"svc_cutscene",			// 2000-04-30 NVS HANDSHAKE SRV<->CL by Maddes
							// added commata
	"svc 35", "svc 36", "svc 37", "svc 38", "svc 39",
	"svc 40", "svc 41", "svc 42", "svc 43", "svc 44", "svc 45", "svc 46", "svc 47", "svc 48", "svc 49",
	"svc 50", "svc 51", "svc 52", "svc 53", "svc 54", "svc 55", "svc 56", "svc 57", "svc 58", "svc 59",
	"svc 60", "svc 61", "svc 62", "svc 63", "svc 64", "svc 65", "svc 66", "svc 67", "svc 68", "svc 69",
	"svc 70", "svc 71", "svc 72", "svc 73", "svc 74", "svc 75", "svc 76", "svc 77", "svc 78", "svc 79",
	"svc 80", "svc 81", "svc 82", "svc 83", "svc 84", "svc 85", "svc 86", "svc 87", "svc 88", "svc 89",
	"svc 90", "svc 91", "svc 92", "svc 93", "svc 94", "svc 95", "svc 96", "svc 97", "svc 98", "svc 99",
	"svc 100", "svc 101", "svc 102", "svc 103", "svc 104", "svc 105", "svc 106", "svc 107", "svc 108", "svc 109",
	"svc 110", "svc 111", "svc 112", "svc 113", "svc 114", "svc 115", "svc 116", "svc 117", "svc 118", "svc 119",
	"svc 120", "svc 121", "svc 122", "svc 123", "svc 124", "svc 125",
	"svc_limit",			// 2001-09-20 Configurable limits by Maddes
							// <variable>
	"svc_extra_version",	// 2000-04-30 NVS HANDSHAKE SRV<->CL by Maddes
							// [float] SSVC [float] CSVC [float] CCLC
};

//=============================================================================

/*
===============
CL_EntityNum

This error checks and tracks the total number of entities
===============
*/
entity_t	*CL_EntityNum (int num)
{
// 2001-09-20 Configurable entity limits by Maddes  start
	if (!cl_entities)
	{
		Cvar_Set(cl_entities_min, cl_entities_min->string);	// do rangecheck
		if (cl.max_edicts < cl_entities_min->value)
		{
			cl.max_edicts = cl_entities_min->value;
		}
		Con_DPrintf("Allocating memory for %i entities.\n", cl.max_edicts);

		cl_entities = Hunk_AllocName (cl.max_edicts*sizeof(entity_t), "cl_edicts");
		memset (cl_entities, 0, cl.max_edicts*sizeof(entity_t));
		cl_entities[0].model = cl.worldmodel;
	}
// 2001-09-20 Configurable entity limits by Maddes  end

	if (num >= cl.num_entities)
	{
// 2001-09-20 Configurable entity limits by Maddes  start
//		if (num >= MAX_EDICTS)
		if (num >= cl.max_edicts)
// 2001-09-20 Configurable entity limits by Maddes  end
			Host_Error ("CL_EntityNum: %i is an invalid number",num);
		while (cl.num_entities<=num)
		{
			cl_entities[cl.num_entities].colormap = vid.colormap;
			cl.num_entities++;
		}
	}

	return &cl_entities[num];
}


/*
==================
CL_ParseStartSoundPacket
==================
*/
void CL_ParseStartSoundPacket(void)
{
	vec3_t  pos;
	int 	channel, ent;
	int 	sound_num;
	int 	volume;
	int 	field_mask;
	float 	attenuation;
	int		i;

	field_mask = MSG_ReadByte();

	if (field_mask & SND_VOLUME)
		volume = MSG_ReadByte ();
	else
		volume = DEFAULT_SOUND_PACKET_VOLUME;

	if (field_mask & SND_ATTENUATION)
		attenuation = MSG_ReadByte () / 64.0;
	else
		attenuation = DEFAULT_SOUND_PACKET_ATTENUATION;

	channel = MSG_ReadShort ();
	sound_num = MSG_ReadByte ();

	ent = channel >> 3;
	channel &= 7;

// 2001-09-20 Configurable entity limits by Maddes  start
//	if (ent > MAX_EDICTS)
	if (ent > cl.max_edicts)
// 2001-09-20 Configurable entity limits by Maddes  end
		Host_Error ("CL_ParseStartSoundPacket: ent = %i", ent);

	for (i=0 ; i<3 ; i++)
		pos[i] = MSG_ReadCoord ();

	S_StartSound (ent, channel, cl.sound_precache[sound_num], pos, volume/255.0, attenuation);
}

/*
==================
CL_KeepaliveMessage

When the client is taking a long time to load stuff, send keepalive messages
so the server doesn't disconnect.
==================
*/
void CL_KeepaliveMessage (void)
{
	float	time;
	static float lastmsg;
	int		ret;
	sizebuf_t	old;
	byte		olddata[8192];

	if (sv.active)
		return;		// no need if server is local
	if (cls.demoplayback)
		return;

// read messages from server, should just be nops
	old = net_message;
	memcpy (olddata, net_message.data, net_message.cursize);

	do
	{
		ret = CL_GetMessage ();
		switch (ret)
		{
		default:
			Host_Error ("CL_KeepaliveMessage: CL_GetMessage failed");
		case 0:
			break;	// nothing waiting
		case 1:
			Host_Error ("CL_KeepaliveMessage: received a message");
			break;
		case 2:
			if (MSG_ReadByte() != svc_nop)
				Host_Error ("CL_KeepaliveMessage: datagram wasn't a nop");
			break;
		}
	} while (ret);

	net_message = old;
	memcpy (net_message.data, olddata, net_message.cursize);

// check time
	time = Sys_FloatTime ();
	if (time - lastmsg < 5)
		return;
	lastmsg = time;

// write out a nop
	Con_Printf ("--> client to server keepalive\n");

	MSG_WriteByte (&cls.message, clc_nop);
	NET_SendMessage (cls.netcon, &cls.message);
	SZ_Clear (&cls.message);
}

/*
==================
CL_ParseServerInfo
==================
*/
void CL_ParseServerInfo (void)
{
	char	*str;
	int		i;
	int		nummodels, numsounds;
	char	model_precache[MAX_MODELS][MAX_QPATH];
	char	sound_precache[MAX_SOUNDS][MAX_QPATH];

	Con_DPrintf ("Serverinfo packet received.\n");
//
// wipe the client_state_t struct
//
	CL_ClearState ();

// parse protocol version number
	i = MSG_ReadLong ();
	if (i != PROTOCOL_VERSION)
	{
		Con_Printf ("Server returned version %i, not %i\n", i, PROTOCOL_VERSION);	// 2000-01-08 Missing linefeeds fix by Maddes
		return;
	}

// parse maxclients
	cl.maxclients = MSG_ReadByte ();
	if (cl.maxclients < 1 || cl.maxclients > MAX_SCOREBOARD)
	{
		Con_Printf("Bad maxclients (%u) from server\n", cl.maxclients);
		return;
	}
	cl.scores = Hunk_AllocName (cl.maxclients*sizeof(*cl.scores), "scores");

// parse gametype
	cl.gametype = MSG_ReadByte ();

// parse signon message
	str = MSG_ReadString ();
	strncpy (cl.levelname, str, sizeof(cl.levelname)-1);

// seperate the printfs so the server message can have a color
	Con_Printf("\n\n\35\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\36\37\n\n");
	Con_Printf ("%c%s\n", 2, str);

//
// first we go through and touch all of the precache data that still
// happens to be in the cache, so precaching something else doesn't
// needlessly purge it
//

// precache models
	memset (cl.model_precache, 0, sizeof(cl.model_precache));
	for (nummodels=1 ; ; nummodels++)
	{
		str = MSG_ReadString ();
		if (!str[0])
			break;
		if (nummodels==MAX_MODELS)
		{
			Con_Printf ("Server sent too many model precaches\n");
			return;
		}
		strcpy (model_precache[nummodels], str);
		Mod_TouchModel (str);
	}

// precache sounds
	memset (cl.sound_precache, 0, sizeof(cl.sound_precache));
	for (numsounds=1 ; ; numsounds++)
	{
		str = MSG_ReadString ();
		if (!str[0])
			break;
		if (numsounds==MAX_SOUNDS)
		{
			Con_Printf ("Server sent too many sound precaches\n");
			return;
		}
		strcpy (sound_precache[numsounds], str);
		S_TouchSound (str);
	}

//
// now we try to load everything else until a cache allocation fails
//

	for (i=1 ; i<nummodels ; i++)
	{
		cl.model_precache[i] = Mod_ForName (model_precache[i], false);
		if (cl.model_precache[i] == NULL)
		{
			Con_Printf("Model %s not found\n", model_precache[i]);
			return;
		}
		CL_KeepaliveMessage ();
	}

	S_BeginPrecaching ();
	for (i=1 ; i<numsounds ; i++)
	{
		cl.sound_precache[i] = S_PrecacheSound (sound_precache[i]);
		CL_KeepaliveMessage ();
	}
	S_EndPrecaching ();


// local state
// 2001-09-20 Configurable entity limits by Maddes  start
//	cl_entities[0].model =
	cl.worldmodel = cl.model_precache[1];
// 2001-09-20 Configurable entity limits by Maddes  end

	R_NewMap ();

	Hunk_Check ();		// make sure nothing is hurt

	noclip_anglehack = false;		// noclip is turned off at start
}


/*
==================
CL_ParseUpdate

Parse an entity update message from the server
If an entities model or origin changes from frame to frame, it must be
relinked.  Other attributes can change without relinking.
==================
*/
int	bitcounts[16];

void CL_ParseUpdate (int bits)
{
	int			i;
	model_t		*model;
	int			modnum;
	qboolean	forcelink;
	entity_t	*ent;
	int			num;
#ifdef GLQUAKE		// 2000-07-16 General variable definition for GLQuake-only variable fix
	int			skin;
#endif			// 2000-07-16 General variable definition for GLQuake-only variable fix

	if (cls.signon == SIGNONS - 1)
	{	// first update is the final signon stage
		cls.signon = SIGNONS;
		CL_SignonReply ();
	}

	if (bits & U_MOREBITS)
	{
		i = MSG_ReadByte ();
		bits |= (i<<8);
	}

	if (bits & U_LONGENTITY)
		num = MSG_ReadShort ();
	else
		num = MSG_ReadByte ();

	ent = CL_EntityNum (num);

	for (i=0 ; i<16 ; i++)
		if (bits&(1<<i))
			bitcounts[i]++;

	if (ent->msgtime != cl.mtime[1])
		forcelink = true;	// no previous frame to lerp from
	else
		forcelink = false;

	ent->msgtime = cl.mtime[0];

	if (bits & U_MODEL)
	{
		modnum = MSG_ReadByte ();
		if (modnum >= MAX_MODELS)
			Host_Error ("CL_ParseModel: bad modnum");
	}
	else
		modnum = ent->baseline.modelindex;

	model = cl.model_precache[modnum];
	if (model != ent->model)
	{
		ent->model = model;
	// automatic animation (torches, etc) can be either all together
	// or randomized
		if (model)
		{
			if (model->synctype == ST_RAND)
				ent->syncbase = (float)(rand()&0x7fff) / 0x7fff;
			else
				ent->syncbase = 0.0;
		}
		else
			forcelink = true;	// hack to make null model players work

#ifdef GLQUAKE
		if (num > 0 && num <= cl.maxclients)
			R_TranslatePlayerSkin (num - 1);
#endif
	}

	if (bits & U_FRAME)
		ent->frame = MSG_ReadByte ();
	else
		ent->frame = ent->baseline.frame;

	if (bits & U_COLORMAP)
		i = MSG_ReadByte();
	else
		i = ent->baseline.colormap;
	if (!i)
		ent->colormap = vid.colormap;
	else
	{
		if (i > cl.maxclients)
// 2001-12-16 Various crashes changed to host errors by Maddes  start
//			Sys_Error ("i >= cl.maxclients");
		{
			Host_Error ("CL_ParseUpdate: i > cl.maxclients: %i > %i", i, cl.maxclients);
			return;
		}
// 2001-12-16 Various crashes changed to host errors by Maddes  end
		ent->colormap = cl.scores[i-1].translations;
	}

#ifdef GLQUAKE
	if (bits & U_SKIN)
		skin = MSG_ReadByte();
	else
		skin = ent->baseline.skin;
	if (skin != ent->skinnum) {
		ent->skinnum = skin;
		if (num > 0 && num <= cl.maxclients)
			R_TranslatePlayerSkin (num - 1);
	}

#else

	if (bits & U_SKIN)
		ent->skinnum = MSG_ReadByte();
	else
		ent->skinnum = ent->baseline.skin;
#endif

	if (bits & U_EFFECTS)
		ent->effects = MSG_ReadByte();
	else
		ent->effects = ent->baseline.effects;

// shift the known values for interpolation
	VectorCopy (ent->msg_origins[0], ent->msg_origins[1]);
	VectorCopy (ent->msg_angles[0], ent->msg_angles[1]);

	if (bits & U_ORIGIN1)
		ent->msg_origins[0][0] = MSG_ReadCoord ();
	else
		ent->msg_origins[0][0] = ent->baseline.origin[0];
	if (bits & U_ANGLE1)
		ent->msg_angles[0][0] = MSG_ReadAngle();
	else
		ent->msg_angles[0][0] = ent->baseline.angles[0];

	if (bits & U_ORIGIN2)
		ent->msg_origins[0][1] = MSG_ReadCoord ();
	else
		ent->msg_origins[0][1] = ent->baseline.origin[1];
	if (bits & U_ANGLE2)
		ent->msg_angles[0][1] = MSG_ReadAngle();
	else
		ent->msg_angles[0][1] = ent->baseline.angles[1];

	if (bits & U_ORIGIN3)
		ent->msg_origins[0][2] = MSG_ReadCoord ();
	else
		ent->msg_origins[0][2] = ent->baseline.origin[2];
	if (bits & U_ANGLE3)
		ent->msg_angles[0][2] = MSG_ReadAngle();
	else
		ent->msg_angles[0][2] = ent->baseline.angles[2];

	if ( bits & U_NOLERP )
		ent->forcelink = true;

	if ( forcelink )
	{	// didn't have an update last message
		VectorCopy (ent->msg_origins[0], ent->msg_origins[1]);
		VectorCopy (ent->msg_origins[0], ent->origin);
		VectorCopy (ent->msg_angles[0], ent->msg_angles[1]);
		VectorCopy (ent->msg_angles[0], ent->angles);
		ent->forcelink = true;
	}
}

/*
==================
CL_ParseBaseline
==================
*/
void CL_ParseBaseline (entity_t *ent)
{
	int			i;

	ent->baseline.modelindex = MSG_ReadByte ();
	ent->baseline.frame = MSG_ReadByte ();
	ent->baseline.colormap = MSG_ReadByte();
	ent->baseline.skin = MSG_ReadByte();
	for (i=0 ; i<3 ; i++)
	{
		ent->baseline.origin[i] = MSG_ReadCoord ();
		ent->baseline.angles[i] = MSG_ReadAngle ();
	}
}


/*
==================
CL_ParseClientdata

Server information pertaining to this client only
==================
*/
void CL_ParseClientdata (int bits)
{
	int		i, j;

	if (bits & SU_VIEWHEIGHT)
		cl.viewheight = MSG_ReadChar ();
	else
		cl.viewheight = DEFAULT_VIEWHEIGHT;

	if (bits & SU_IDEALPITCH)
		cl.idealpitch = MSG_ReadChar ();