p_client.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

void InitClientPersistant (gclient_t *client)
{
	gitem_t		*item;

	memset (&client->pers, 0, sizeof(client->pers));

	item = FindItem("Blaster");
	client->pers.selected_item = ITEM_INDEX(item);
	client->pers.inventory[client->pers.selected_item] = 1;

	client->pers.weapon = item;

	client->pers.health			= 100;
	client->pers.max_health		= 100;

	client->pers.max_bullets	= 200;
	client->pers.max_shells		= 100;
	client->pers.max_rockets	= 50;
	client->pers.max_grenades	= 50;
	client->pers.max_cells		= 200;
	client->pers.max_slugs		= 50;

	client->pers.connected = true;
}


void InitClientResp (gclient_t *client)
{
	memset (&client->resp, 0, sizeof(client->resp));
	client->resp.enterframe = level.framenum;
	client->resp.coop_respawn = client->pers;
}

/*
==================
SaveClientData

Some information that should be persistant, like health, 
is still stored in the edict structure, so it needs to
be mirrored out to the client structure before all the
edicts are wiped.
==================
*/
void SaveClientData (void)
{
	int		i;
	edict_t	*ent;

	for (i=0 ; i<game.maxclients ; i++)
	{
		ent = &g_edicts[1+i];
		if (!ent->inuse)
			continue;
		game.clients[i].pers.health = ent->health;
		game.clients[i].pers.max_health = ent->max_health;
		game.clients[i].pers.savedFlags = (ent->flags & (FL_GODMODE|FL_NOTARGET|FL_POWER_ARMOR));
		if (coop->value)
			game.clients[i].pers.score = ent->client->resp.score;
	}
}

void FetchClientEntData (edict_t *ent)
{
	ent->health = ent->client->pers.health;
	ent->max_health = ent->client->pers.max_health;
	ent->flags |= ent->client->pers.savedFlags;
	if (coop->value)
		ent->client->resp.score = ent->client->pers.score;
}



/*
=======================================================================

  SelectSpawnPoint

=======================================================================
*/

/*
================
PlayersRangeFromSpot

Returns the distance to the nearest player from the given spot
================
*/
float	PlayersRangeFromSpot (edict_t *spot)
{
	edict_t	*player;
	float	bestplayerdistance;
	vec3_t	v;
	int		n;
	float	playerdistance;


	bestplayerdistance = 9999999;

	for (n = 1; n <= maxclients->value; n++)
	{
		player = &g_edicts[n];

		if (!player->inuse)
			continue;

		if (player->health <= 0)
			continue;

		VectorSubtract (spot->s.origin, player->s.origin, v);
		playerdistance = VectorLength (v);

		if (playerdistance < bestplayerdistance)
			bestplayerdistance = playerdistance;
	}

	return bestplayerdistance;
}

/*
================
SelectRandomDeathmatchSpawnPoint

go to a random point, but NOT the two points closest
to other players
================
*/
edict_t *SelectRandomDeathmatchSpawnPoint (void)
{
	edict_t	*spot, *spot1, *spot2;
	int		count = 0;
	int		selection;
	float	range, range1, range2;

	spot = NULL;
	range1 = range2 = 99999;
	spot1 = spot2 = NULL;

	while ((spot = G_Find (spot, FOFS(classname), "info_player_deathmatch")) != NULL)
	{
		count++;
		range = PlayersRangeFromSpot(spot);
		if (range < range1)
		{
			range1 = range;
			spot1 = spot;
		}
		else if (range < range2)
		{
			range2 = range;
			spot2 = spot;
		}
	}

	if (!count)
		return NULL;

	if (count <= 2)
	{
		spot1 = spot2 = NULL;
	}
	else
		count -= 2;

	selection = rand() % count;

	spot = NULL;
	do
	{
		spot = G_Find (spot, FOFS(classname), "info_player_deathmatch");
		if (spot == spot1 || spot == spot2)
			selection++;
	} while(selection--);

	return spot;
}

/*
================
SelectFarthestDeathmatchSpawnPoint

================
*/
edict_t *SelectFarthestDeathmatchSpawnPoint (void)
{
	edict_t	*bestspot;
	float	bestdistance, bestplayerdistance;
	edict_t	*spot;


	spot = NULL;
	bestspot = NULL;
	bestdistance = 0;
	while ((spot = G_Find (spot, FOFS(classname), "info_player_deathmatch")) != NULL)
	{
		bestplayerdistance = PlayersRangeFromSpot (spot);

		if (bestplayerdistance > bestdistance)
		{
			bestspot = spot;
			bestdistance = bestplayerdistance;
		}
	}

	if (bestspot)
	{
		return bestspot;
	}

	// if there is a player just spawned on each and every start spot
	// we have no choice to turn one into a telefrag meltdown
	spot = G_Find (NULL, FOFS(classname), "info_player_deathmatch");

	return spot;
}

edict_t *SelectDeathmatchSpawnPoint (void)
{
	if ( (int)(dmflags->value) & DF_SPAWN_FARTHEST)
		return SelectFarthestDeathmatchSpawnPoint ();
	else
		return SelectRandomDeathmatchSpawnPoint ();
}


edict_t *SelectCoopSpawnPoint (edict_t *ent)
{
	int		index;
	edict_t	*spot = NULL;
	char	*target;

	index = ent->client - game.clients;

	// player 0 starts in normal player spawn point
	if (!index)
		return NULL;

	spot = NULL;

	// assume there are four coop spots at each spawnpoint
	while (1)
	{
		spot = G_Find (spot, FOFS(classname), "info_player_coop");
		if (!spot)
			return NULL;	// we didn't have enough...

		target = spot->targetname;
		if (!target)
			target = "";
		if ( Q_stricmp(game.spawnpoint, target) == 0 )
		{	// this is a coop spawn point for one of the clients here
			index--;
			if (!index)
				return spot;		// this is it
		}
	}


	return spot;
}


/*
===========
SelectSpawnPoint

Chooses a player start, deathmatch start, coop start, etc
============
*/
void	SelectSpawnPoint (edict_t *ent, vec3_t origin, vec3_t angles)
{
	edict_t	*spot = NULL;

	if (deathmatch->value)
		spot = SelectDeathmatchSpawnPoint ();
	else if (coop->value)
		spot = SelectCoopSpawnPoint (ent);

	// find a single player start spot
	if (!spot)
	{
		while ((spot = G_Find (spot, FOFS(classname), "info_player_start")) != NULL)
		{
			if (!game.spawnpoint[0] && !spot->targetname)
				break;

			if (!game.spawnpoint[0] || !spot->targetname)
				continue;

			if (Q_stricmp(game.spawnpoint, spot->targetname) == 0)
				break;
		}

		if (!spot)
		{
			if (!game.spawnpoint[0])
			{	// there wasn't a spawnpoint without a target, so use any
				spot = G_Find (spot, FOFS(classname), "info_player_start");
			}
			if (!spot)
				gi.error ("Couldn't find spawn point %s\n", game.spawnpoint);
		}
	}

	VectorCopy (spot->s.origin, origin);
	origin[2] += 9;
	VectorCopy (spot->s.angles, angles);
}

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


void InitBodyQue (void)
{
	int		i;
	edict_t	*ent;

	level.body_que = 0;
	for (i=0; i<BODY_QUEUE_SIZE ; i++)
	{
		ent = G_Spawn();
		ent->classname = "bodyque";
	}
}

void body_die (edict_t *self, edict_t *inflictor, edict_t *attacker, int damage, vec3_t point)
{
	int	n;

	if (self->health < -40)
	{
		gi.sound (self, CHAN_BODY, gi.soundindex ("misc/udeath.wav"), 1, ATTN_NORM, 0);
		for (n= 0; n < 4; n++)
			ThrowGib (self, "models/objects/gibs/sm_meat/tris.md2", damage, GIB_ORGANIC);
		self->s.origin[2] -= 48;
		ThrowClientHead (self, damage);
		self->takedamage = DAMAGE_NO;
	}
}

void CopyToBodyQue (edict_t *ent)
{
	edict_t		*body;

	// grab a body que and cycle to the next one
	body = &g_edicts[(int)maxclients->value + level.body_que + 1];
	level.body_que = (level.body_que + 1) % BODY_QUEUE_SIZE;

	// FIXME: send an effect on the removed body

	gi.unlinkentity (ent);

	gi.unlinkentity (body);
	body->s = ent->s;
	body->s.number = body - g_edicts;

	body->svflags = ent->svflags;
	VectorCopy (ent->mins, body->mins);
	VectorCopy (ent->maxs, body->maxs);
	VectorCopy (ent->absmin, body->absmin);
	VectorCopy (ent->absmax, body->absmax);
	VectorCopy (ent->size, body->size);
	body->solid = ent->solid;
	body->clipmask = ent->clipmask;
	body->owner = ent->owner;
	body->movetype = ent->movetype;

	body->die = body_die;
	body->takedamage = DAMAGE_YES;

	gi.linkentity (body);
}


void respawn (edict_t *self)
{
	if (deathmatch->value || coop->value)
	{
		// spectator's don't leave bodies
		if (self->movetype != MOVETYPE_NOCLIP)
			CopyToBodyQue (self);
		self->svflags &= ~SVF_NOCLIENT;
		PutClientInServer (self);

		// add a teleportation effect
		self->s.event = EV_PLAYER_TELEPORT;

		// hold in place briefly
		self->client->ps.pmove.pm_flags = PMF_TIME_TELEPORT;
		self->client->ps.pmove.pm_time = 14;

		self->client->respawn_time = level.time;

		return;
	}

	// restart the entire server
	gi.AddCommandString ("menu_loadgame\n");
}

/* 
 * only called when pers.spectator changes
 * note that resp.spectator should be the opposite of pers.spectator here
 */
void spectator_respawn (edict_t *ent)
{
	int i, numspec;

	// if the user wants to become a spectator, make sure he doesn't
	// exceed max_spectators

	if (ent->client->pers.spectator) {
		char *value = Info_ValueForKey (ent->client->pers.userinfo, "spectator");
		if (*spectator_password->string && 
			strcmp(spectator_password->string, "none") && 
			strcmp(spectator_password->string, value)) {
			gi.cprintf(ent, PRINT_HIGH, "Spectator password incorrect.\n");
			ent->client->pers.spectator = false;
			gi.WriteByte (svc_stufftext);
			gi.WriteString ("spectator 0\n");
			gi.unicast(ent, true);
			return;
		}

		// count spectators
		for (i = 1, numspec = 0; i <= maxclients->value; i++)
			if (g_edicts[i].inuse && g_edicts[i].client->pers.spectator)
				numspec++;

		if (numspec >= maxspectators->value) {
			gi.cprintf(ent, PRINT_HIGH, "Server spectator limit is full.");
			ent->client->pers.spectator = false;
			// reset his spectator var
			gi.WriteByte (svc_stufftext);
			gi.WriteString ("spectator 0\n");
			gi.unicast(ent, true);
			return;
		}
	} else {
		// he was a spectator and wants to join the game
		// he must have the right password
		char *value = Info_ValueForKey (ent->client->pers.userinfo, "password");
		if (*password->string && strcmp(password->string, "none") && 
			strcmp(password->string, value)) {
			gi.cprintf(ent, PRINT_HIGH, "Password incorrect.\n");
			ent->client->pers.spectator = true;
			gi.WriteByte (svc_stufftext);
			gi.WriteString ("spectator 1\n");
			gi.unicast(ent, true);
			return;
		}
	}

	// clear client on respawn
	ent->client->resp.score = ent->client->pers.score = 0;

	ent->svflags &= ~SVF_NOCLIENT;
	PutClientInServer (ent);

	// add a teleportation effect
	if (!ent->client->pers.spectator)  {
		// send effect
		gi.WriteByte (svc_muzzleflash);
		gi.WriteShort (ent-g_edicts);
		gi.WriteByte (MZ_LOGIN);
		gi.multicast (ent->s.origin, MULTICAST_PVS);

		// hold in place briefly
		ent->client->ps.pmove.pm_flags = PMF_TIME_TELEPORT;
		ent->client->ps.pmove.pm_time = 14;
	}

	ent->client->respawn_time = level.time;

	if (ent->client->pers.spectator) 
		gi.bprintf (PRINT_HIGH, "%s has moved to the sidelines\n", ent->client->pers.netname);
	else
		gi.bprintf (PRINT_HIGH, "%s joined the game\n", ent->client->pers.netname);
}

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


/*
===========
PutClientInServer

Called when a player connects to a server or respawns in
a deathmatch.
============
*/
void PutClientInServer (edict_t *ent)
{
	vec3_t	mins = {-16, -16, -24};
	vec3_t	maxs = {16, 16, 32};
	int		index;
	vec3_t	spawn_origin, spawn_angles;
	gclient_t	*client;
	int		i;
	client_persistant_t	saved;
	client_respawn_t	resp;

	// find a spawn point
	// do it before setting health back up, so farthest
	// ranging doesn't count this client
	SelectSpawnPoint (ent, spawn_origin, spawn_angles);

	index = ent-g_edicts-1;
	client = ent->client;

	// deathmatch wipes most client data every spawn
	if (deathmatch->value)
	{
		char		userinfo[MAX_INFO_STRING];

		resp = client->resp;
		memcpy (userinfo, client->pers.userinfo, sizeof(userinfo));
		InitClientPersistant (client);
		ClientUserinfoChanged (ent, userinfo);
	}
	else if (coop->value)
	{
//		int			n;
		char		userinfo[MAX_INFO_STRING];

		resp = client->resp;
		memcpy (userinfo, client->pers.userinfo, sizeof(userinfo));
		// this is kind of ugly, but it's how we want to handle keys in coop
//		for (n = 0; n < game.num_items; n++)
//		{
//			if (itemlist[n].flags & IT_KEY)
//				resp.coop_respawn.inventory[n] = client->pers.inventory[n];
//		}
		resp.coop_respawn.game_helpchanged = client->pers.game_helpchanged;
		resp.coop_respawn.helpchanged = client->pers.helpchanged;
		client->pers = resp.coop_respawn;
		ClientUserinfoChanged (ent, userinfo);
		if (resp.score > client->pers.score)
			client->pers.score = resp.score;
	}
	else
	{
		memset (&resp, 0, sizeof(resp));
	}

	// clear everything but the persistant data
	saved = client->pers;
	memset (client, 0, sizeof(*client));
	client->pers = saved;
	if (client->pers.health <= 0)
		InitClientPersistant(client);
	client->resp = resp;

	// copy some data from the client to the entity
	FetchClientEntData (ent);

	// clear entity values
	ent->groundentity = NULL;
	ent->client = &game.clients[index];
	ent->takedamage = DAMAGE_AIM;
	ent->movetype = MOVETYPE_WALK;
	ent->viewheight = 22;
	ent->inuse = true;
	ent->classname = "player";
	ent->mass = 200;
	ent->solid = SOLID_BBOX;
	ent->deadflag = DEAD_NO;
	ent->air_finished = level.time + 12;
	ent->clipmask = MASK_PLAYERSOLID;
	ent->model = "players/male/tris.md2";
	ent->pain = player_pain;
	ent->die = player_die;
	ent->waterlevel = 0;
	ent->watertype = 0;
	ent->flags &= ~FL_NO_KNOCKBACK;
	ent->svflags &= ~SVF_DEADMONSTER;

	VectorCopy (mins, ent->mins);
	VectorCopy (maxs, ent->maxs);
	VectorClear (ent->velocity);

	// clear playerstate values
	memset (&ent->client->ps, 0, sizeof(client->ps));

	client->ps.pmove.origin[0] = spawn_origin[0]*8;
	client->ps.pmove.origin[1] = spawn_origin[1]*8;
	client->ps.pmove.origin[2] = spawn_origin[2]*8;

	if (deathmatch->value && ((int)dmflags->value & DF_FIXED_FOV))
	{
		client->ps.fov = 90;
	}
	else
	{
		client->ps.fov = atoi(Info_ValueForKey(client->pers.userinfo, "fov"));
		if (client->ps.fov < 1)
			client->ps.fov = 90;
		else if (client->ps.fov > 160)
			client->ps.fov = 160;
	}

	client->ps.gunindex = gi.modelindex(client->pers.weapon->view_model);

	// clear entity state values
	ent->s.effects = 0;
	ent->s.modelindex = 255;		// will use the skin specified model
	ent->s.modelindex2 = 255;		// custom gun model