Quake DeveLS - Tracker

Author: Chris Hilton
Difficulty: Easy

Here's another little cooperative play mod, or a pretty sinister deathmatch mod. Since you guys are space marines, you ought to be able to keep tabs on each other, right? This little patch adds a command to check the health and range of all players.

All of the editing for this patch takes place in g_cmds.c. In Clientcommand(), I've added the following ('+' signs indicate lines added):

 		Cmd_PutAway_f (ent);
 	else if (Q_stricmp (cmd, "wave") == 0)
 		Cmd_Wave_f (ent);
+	// CCH: new command 'checkstats'
+	else if (Q_stricmp (cmd, "checkstats") == 0)
+		Cmd_CheckStats_f (ent);
 	else if (Q_stricmp (cmd, "gameversion") == 0)
 		gi.cprintf (ent, PRINT_HIGH, "%s : %s\n", GAMEVERSION, __DATE__);

This allows us to call a new function Cmd_CheckStats_f() from the console by typing 'cmd checkstats'. I recommend binding that to a key for easy access.

Now for what Cmd_CheckStats_f() will do. I've added the new function just before ClientCommand(), like so:

+CCH: New function to print all players' stats
+void Cmd_CheckStats_f (edict_t *ent)
+	int		i, j;
+	edict_t	*player;
+	char	stats[500];
+	vec3_t	v;
+	float	len;
+	// use in coop mode only
+//	if (!coop->value)
+//		return;
+	j = sprintf(stats, "            Name Health Range\n=============================\n");
+	for (i=0 ; ivalue ; i++)
+	{
+		player = g_edicts + 1 + i;
+		if (!player->inuse || !player->client)
+			continue; 
+		VectorSubtract (ent->s.origin, player->s.origin, v);
+		len = VectorLength (v);
+		j += sprintf(stats + j, "%16s %6d %5.0f\n", player->client->pers.netname, player->health, len);
+		if (j > 450)
+			break;
+	}
+	gi.centerprintf(ent, "%s", stats);

Normally, I would think you want this to be a coop only command, but since coop mode hasn't been implemented yet, I've commented that bit of the code out. stats is the buffer we'll store the information in and j will keep track of where we are in the buffer. First, we put some column headings in our buffer, then we run through the player edicts. If the edict has a current player, we calculate its range from this player and then add the name, health, and range information to the buffer. The printf specification makes sure these values all line up with the column headings appropriately, with 16 spaces for the name, 6 spaces for health, and 5 spaces for the range with no digits after the decimal point. If we've written more than 450 characters to the buffer, we're getting near the end of the buffer so we go ahead and break out before we have a buffer overrun. Finally, we centerprint all this info we've gathered to the player.

Feel free to make changes on the info presented, like shortening the columns (health will never be more than 3 digits, but the column heading takes 6 spaces) or presenting new info (delta x,y,z values maybe). Also, you might want to skip the current player, since they probably know all this info already. Full source and patch file at http://www.jump.net/~dctank.

Tutorial by Chris Hilton

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