Quake DeveLS - JetPack
Author: Muce
Difficulty: Medium
Death from above
How about we give our
marine a jetpack for those hard to reach spots on your favorite map. Were going
to start by adding two new variables to the client structure, so head on down
to the bottom of the gclient_t structure at about line 835 of g_local.h
and edit it to look like this :
float respawn_time; // can respawn when time > this // MUCE: added for jetpack thrusting. qboolean thrusting; // 1 on 0 off float next_thrust_sound;} gclient_t;
Now we
need to add a new command to g_cmds.c right above ClientCommand()
/*=================Cmd_Thrust_f MUCE:To set jetpack on or off=================*/void Cmd_Thrust_f (edict_t *ent){ char *string; string=gi.args(); if (Q_stricmp ( string, "on") == 0) { ent->client->thrusting=1; ent->client->next_thrust_sound=0; } else { ent->client->thrusting=0; }}
Also, add
these lines to the ClientCommand function so we can call our new function:
else if (Q_stricmp (cmd, "wave") == 0) Cmd_Wave_f (ent); // MUCE: added to jetpack thrust! else if (Q_stricmp(cmd, "thrust") == 0 ) Cmd_Thrust_f (ent);
This sets
it so that if we type "cmd thrust on" in the console, we set
ent->client->thrust to true and if we type "cmd thrust
Thrusting
(!)
Good. Now to make a think
routine for the jetpack. I suggest making a new file called jetpack.c and
adding it to your project. The contents of the file are as such:
// MUCE: JetPack addition! #include "g_local.h" /*=================ApplyThrust MUCE:To add thrusting velocity to player=================*/ void ApplyThrust (edict_t *ent){ vec3_t forward, right; vec3_t pack_pos, jet_vector; //MUCE: add thrust to character if (ent->velocity[2] < -500) ent->velocity[2]+=((ent->velocity[2])/(-5)); else if (ent->velocity[2] < 0) ent->velocity[2] += 100; else ent->velocity[2]+=((1000-ent->velocity[2])/8); //MUCE: add sparks AngleVectors(ent->client->v_angle, forward, right, NULL); VectorScale (forward, -7, pack_pos); VectorAdd (pack_pos, ent->s.origin, pack_pos); pack_pos[2] += (ent->viewheight); VectorScale (forward, -50, jet_vector); gi.WriteByte (svc_temp_entity); gi.WriteByte (TE_SPARKS); gi.WritePosition (pack_pos); gi.WriteDir (jet_vector); gi.multicast (pack_pos, MULTICAST_PVS); //MUCE: add sound if (ent->client->next_thrust_sound < level.time) { gi.sound (ent, CHAN_BODY, gi.soundindex("weapons/rockfly.wav"), 1, ATTN_NORM, 0); ent->client->next_thrust_sound=level.time+1.0; }}
What it
does: ent->velocity[2] holds the current velocity of the player in the
"z" or up direction. All's I'm doing is simply adding to the current
velocity. Well, I broke it up into different cases to provide for a more
realistic jetpack effect. Mess around with the numbers some if you want to
customize it for yourself.
The next part just adds
the effect of sparks coming out of your back to make it look like a jetpack.
This part of the code is copied nearly exactly from the THROWUP tutorial
(Thanks SumFuka!).
Finally we play the
"rocket flying" sound every second (the .wav file is about a second
long). Remember when we called "cmd thrust on" we set
next_thrust_sound to zero, that way we play the sound the first time we run
through the function.
Think.
One last thing... we have
to call the think routine. So, in p_client.c in the ClientThink routine around
line 960 we'll add these lines:
level.exitintermission = true; return; } // MUCE: Think for thrusting if (ent->client->thrusting) ApplyThrust (ent);
We're done.
And that's it. Compile it,
run it, and add these two aliases:
Alias +thrust "cmd thrust on" Alias -thrust "cmd thrust off"
Then bind
+thrust to some key and Jet away! Once again, thanks goes out to SumFuka for
the throwup code and for his help on helping me through my +thrust problem.
(One last note, if you're
really keen you can use the 'stuffcmd' function (get it from Q_DEVELS.C in the
downloads section at PlanetQuake QDeveLS) to bind the aliases for thrust on and
off. Remember to use \" whenever you want a " in your string. E.g.
stuffcmd(ent, "alias +thrust \"cmd thrust on\");
Put that
in the ClientConnect function...)
Tutorial by Muce with a little contribution from SumFuka
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