Adding a new weapon (Melee) tutorial

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Adding a new weapon is simple.. adding a MELEE weapons isn't as easy! If you've tried coding in Q2, you'll notice that you cannot use Fire_Hit for player weapons! This will fix that with a whole new Fire Function! Get ready to knife em up!

Posted by Paril on Feb 5th, 2006 - Intermediate Server Side Coding

[page=New weapon (Melee)]
Ok, first we need to define the fire function.

Open up g_weapon.c, head to the bottom, all the way to the bottom... further... after fire_bfg.. further... yes, right there. Add all this in straight from the bottom:

/*
/*
==================
Fire_Punch
C&#111;mmented f&#111;r M&#111;ddb Tut&#111;rial
==================
*/

v&#111;id fire_punch &#40;edict_t *self, vec3_t start, vec3_t aim, int reach, int damage, int kick, int quiet, int m&#111;d&#41;
{
	vec3_t		f&#111;rward, right, up;
	vec3_t		v;
	vec3_t		p&#111;int;
	trace_t		tr;

	vect&#111;angles2 &#40;aim, v&#41;;                   //
	AngleVect&#111;rs &#40;v, f&#111;rward, right, up&#41;;    //
	Vect&#111;rN&#111;rmalize &#40;f&#111;rward&#41;;               //
	Vect&#111;rMA&#40; start, reach, f&#111;rward, p&#111;int&#41;; // Aiming stuff

	//see if the hit c&#111;nnects
	tr = gi.trace&#40;start, NULL, NULL, p&#111;int, self, MASK_SHOT&#41;;
	if&#40;tr.fracti&#111;n ==  1.0&#41;
	{
		if&#40;&#33;quiet&#41; //n&#111;t needed, it&#39;s better t&#111; f&#111;ll&#111;w my later steps
			//gi.s&#111;und &#40;self, CHAN_WEAPON, gi.s&#111;undindex &#40;&#34;weap&#111;ns/swish.wav&#34;&#41;, 1, ATTN_NORM, 0&#41;;
		return;
	}

	if&#40;tr.ent-&#62;takedamage == DAMAGE_YES &#124;&#124; tr.ent-&#62;takedamage == DAMAGE_AIM&#41; // Make sure they t&#111;&#111;k damage
	{
		// pull the player f&#111;rward if y&#111;u d&#111; damage
		Vect&#111;rMA&#40;self-&#62;vel&#111;city, 75, f&#111;rward, self-&#62;vel&#111;city&#41;; // Pull f&#111;rward
		Vect&#111;rMA&#40;self-&#62;vel&#111;city, 75, up, self-&#62;vel&#111;city&#41;; // Pull up a tad bit. Y&#111;u can&#39;t slide&#59;&#41;

		// d&#111; the damage
		// FIXME - make the damage appear at right sp&#111;t and directi&#111;n
			T_Damage &#40;tr.ent, self, self, vec3_&#111;rigin, tr.ent-&#62;s.&#111;rigin, vec3_&#111;rigin, damage, kick/2, 
            			DAMAGE_ENERGY, m&#111;d&#41;; // Time t&#111; Slice my friends
			            gi.s&#111;und&#40;self, CHAN_WEAPON, gi.s&#111;undindex&#40;&#34;weap&#111;ns/phitw1.wav&#34;&#41;, 1, ATTN_IDLE, 0&#41;; // Used f&#111;r my Punch. 
                               //Rename and use f&#111;r whatever
		
		if&#40;&#33;quiet&#41;
			gi.s&#111;und &#40;self, CHAN_WEAPON, gi.s&#111;undindex &#40;&#34;weap&#111;ns/meatht.wav&#34;&#41;, 1, ATTN_NORM, 0&#41;; // D&#111;n&#39;t change this. 
                            //This is &#111;nly used if y&#111;ur weap&#111;n is n&#111;t quiet.. Chainfist isn&#39;t quiet, knife is
	}
	else
	{
		if&#40;&#33;quiet&#41;
			gi.s&#111;und &#40;self, CHAN_WEAPON, gi.s&#111;undindex &#40;&#34;weap&#111;ns/tink1.wav&#34;&#41;, 1, ATTN_NORM, 0&#41;; //same as ab&#111;ve

		Vect&#111;rScale &#40;tr.plane.n&#111;rmal, 256, p&#111;int&#41;;
		gi.WriteByte &#40;svc_temp_entity&#41;;
		gi.WriteByte &#40;TE_SPARKS&#41;; //make sparks, n&#111;t gunsh&#111;t..
		gi.WriteP&#111;siti&#111;n &#40;tr.endp&#111;s&#41;;
		gi.WriteDir &#40;p&#111;int&#41;;
		gi.multicast &#40;tr.endp&#111;s, MULTICAST_PVS&#41;;
        gi.s&#111;und &#40;self, CHAN_AUTO, gi.s&#111;undindex&#40;&#34;weap&#111;ns/phitw2.wav&#34;&#41; , 1, ATTN_NORM, 0&#41;;  //hit wall s&#111;und
	}
}

Whew. That's alot of code.

Now, let's go to p_weapon.c, and make sure you've got a model! Put this code to the way bottom, like g_weapon

/*
=======================
Punching/Melee
=======================
*/

v&#111;id Null_Fire&#40;edict_t *ent&#41;
{
	int	i;
	vec3_t		start;
	vec3_t		f&#111;rward, right;
	vec3_t		angles;
	int			damage = 5; //change t&#111; whatever
	int			kick = 2; //ditt&#111; here
	vec3_t		&#111;ffset;

	if &#40;ent-&#62;client-&#62;ps.gunframe == 11&#41; //rename 11 t&#111; after y&#111;u&#39;re attack frame
	{
		ent-&#62;client-&#62;ps.gunframe++;
		return;
	}

	AngleVect&#111;rs &#40;ent-&#62;client-&#62;v_angle, f&#111;rward, right, NULL&#41;;

	Vect&#111;rScale &#40;f&#111;rward, -2, ent-&#62;client-&#62;kick_&#111;rigin&#41;;
	ent-&#62;client-&#62;kick_angles&#91;0&#93; = -2;

	Vect&#111;rSet&#40;&#111;ffset, 0, 8,  ent-&#62;viewheight-8 &#41;;
	P_Pr&#111;jectS&#111;urce &#40;ent-&#62;client, ent-&#62;s.&#111;rigin, &#111;ffset, f&#111;rward, right, start&#41;; //where d&#111;es the hit start fr&#111;m?

	if &#40;is_quad&#41;
	{
		damage *= 4;
		kick *= 4;
	}

	// get start / end p&#111;siti&#111;ns
	Vect&#111;rAdd &#40;ent-&#62;client-&#62;v_angle, ent-&#62;client-&#62;kick_angles, angles&#41;;
	AngleVect&#111;rs &#40;angles, f&#111;rward, right, NULL&#41;;
	Vect&#111;rSet&#40;&#111;ffset, 0, 8, ent-&#62;viewheight-8 &#41;;
	P_Pr&#111;jectS&#111;urce &#40;ent-&#62;client, ent-&#62;s.&#111;rigin, &#111;ffset, f&#111;rward, right, start&#41;;
	fire_punch &#40;ent, start, f&#111;rward, 45, damage, 200, 1, MOD_PUNCH&#41;; // yep, matches the fire_ functi&#111;n	

	ent-&#62;client-&#62;ps.gunframe++; //NEEDED
	PlayerN&#111;ise&#40;ent, start, PNOISE_WEAPON&#41;; //NEEDED

//	if &#40;&#33; &#40; &#40;int&#41;dmflags-&#62;value & DF_INFINITE_AMMO &#41; &#41;
//		ent-&#62;client-&#62;pers.invent&#111;ry&#91;ent-&#62;client-&#62;amm&#111;_index&#93;--; // c&#111;mment these &#111;ut t&#111; prevent the Minus NULL Amm&#111; bug
}

v&#111;id Weap&#111;n_Null &#40;edict_t *ent&#41;
{
	static int	pause_frames&#91;&#93;	= {10, 21, 0};
	static int	fire_frames&#91;&#93;	= {6, 0}; // Frame stuff here

	Weap&#111;n_Generic &#40;ent, 3, 9, 22, 24, pause_frames, fire_frames, Null_Fire&#41;;
}

Ok, now, let's head to g_items.c, near the beginning.

You'll see

v&#111;id Weap&#111;n_Blaster &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_Sh&#111;tgun &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_SuperSh&#111;tgun &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_Machinegun &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_Chaingun &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_HyperBlaster &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_R&#111;cketLauncher &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_Grenade &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_GrenadeLauncher &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_Railgun &#40;edict_t *ent&#41;;
v&#111;id Weap&#111;n_BFG &#40;edict_t *ent&#41;;

under that, add

v&#111;id Weap&#111;n_Null &#40;edict_t *ent&#41;;

That was easy! now, go lower, and find:

/* weap&#111;n_blaster &#40;.3 .3 1&#41; &#40;-16 -16 -16&#41; &#40;16 16 16&#41;
always &#111;wned, never in the w&#111;rld
*/
	{
		&#34;weap&#111;n_blaster&#34;, 
		NULL,
		Use_Weap&#111;n,
		NULL,
		Weap&#111;n_Blaster,
		&#34;misc/w_pkup.wav&#34;,
		NULL, 0,
		&#34;m&#111;dels/weap&#111;ns/v_blast/tris.md2&#34;,
/* ic&#111;n */		&#34;w_blaster&#34;,
/* pickup */	&#34;Blaster&#34;,
		0,
		0,
		NULL,
		IT_WEAPON&#124;IT_STAY_COOP,
		WEAP_BLASTER,
		NULL,
		0,
/* precache */ &#34;weap&#111;ns/blastf1a.wav misc/lasfly.wav&#34;
	},

above that, add this:

{
        &#34;weap&#111;n_null&#34;,           //  The map entity name. d&#111;nt include this in a map whatever y&#111;u d&#111;.
        NULL,                    // The pickup functi&#111;n
        Use_Weap&#111;n,              // H&#111;w t&#111; use
        NULL,                    // the dr&#111;p functi&#111;n
       Weap&#111;n_Null,             //What the use functi&#111;n is
       &#34;misc/w_pkup.wav&#34;,
       &#34;m&#111;dels/nullweap&#111;n.md2&#34;,0,
       &#34;m&#111;dels/nullweap&#111;n.md2&#34;, //The m&#111;dels stuff.&#40;This is my Hands m&#111;del&#41;
       &#34;w_blaster&#34;,             //Ic&#111;n t&#111; be used. y&#111;u c&#111;uld create an&#111;ther, y&#111;u pr&#111;bably sh&#111;uld
       &#34;Hands&#34;,             //Pickup name. use this t&#111; give the item t&#111; s&#111;me&#111;ne at the start &#111;f the game
        0,
        0,
        NULL,
        IT_WEAPON&#124;IT_STAY_COOP,
        WEAP_BLASTER,            // the m&#111;del index, just an integer defined in g_l&#111;cal.h
        NULL,
        0,
        &#34;&#34;
},

Ok, now that that's done, let's head on over to g_local.c Find:

#define MOD_EXIT			28
#define MOD_SPLASH			29
#define MOD_TARGET_LASER	30
#define MOD_TRIGGER_HURT	31
#define MOD_HIT				32
#define MOD_TARGET_BLASTER	33
#define MOD_FRIENDLY_FIRE	0x8000000

below them, add

#define MOD_PUNCH    34

Now, go to p_client.c, and find

case MOD_TELEFRAG&#58;
	message = &#34;tried t&#111; invade&#34;;
	message2 = &#34;&#39;s pers&#111;nal space&#34;;
	break;

under it, add this:

case MOD_PUNCH&#58;
	message = &#34;t&#111;&#111;k&#34;;
	message2 = &#34;&#39;s fist in the face&#34;;
	break;

Now that we have the means of death, let's replace the blaster with it! Find:

PrecacheItem &#40;FindItem &#40;&#34;Blaster&#34;&#41;&#41;;

replace with

PrecacheItem &#40;FindItem &#40;&#34;Hands&#34;&#41;&#41;;

Find

if &#40;weap&#111;n && &#33;&#111;ldc&#111;unt&#41;
	{
		if &#40;&#111;ther-&#62;client-&#62;pers.weap&#111;n &#33;= ent-&#62;item && &#40; &#33;deathmatch-&#62;value &#124;&#124; &#111;ther-&#62;client-&#62;pers.weap&#111;n == FindItem&#40;&#34;Blaster&#34;&#41; &#41; &#41;
			&#111;ther-&#62;client-&#62;newweap&#111;n = ent-&#62;item;
	}

Replace with

if &#40;weap&#111;n && &#33;&#111;ldc&#111;unt&#41;
	{
		if &#40;&#111;ther-&#62;client-&#62;pers.weap&#111;n &#33;= ent-&#62;item && &#40; &#33;deathmatch-&#62;value &#124;&#124; &#111;ther-&#62;client-&#62;pers.weap&#111;n == FindItem&#40;&#34;Hands&#34;&#41; &#41; &#41;
			&#111;ther-&#62;client-&#62;newweap&#111;n = ent-&#62;item;
	}

Find

item = self-&#62;client-&#62;pers.weap&#111;n;
	if &#40;&#33; self-&#62;client-&#62;pers.invent&#111;ry&#91;self-&#62;client-&#62;amm&#111;_index&#93; &#41;
		item = NULL;
	if &#40;item && &#40;strcmp &#40;item-&#62;pickup_name, &#34;Blaster&#34;&#41; == 0&#41;&#41;
		item = NULL;

Replace again with

item = self-&#62;client-&#62;pers.weap&#111;n;
	if &#40;&#33; self-&#62;client-&#62;pers.invent&#111;ry&#91;self-&#62;client-&#62;amm&#111;_index&#93; &#41;
		item = NULL;
	if &#40;item && &#40;strcmp &#40;item-&#62;pickup_name, &#34;Hands&#34;&#41; == 0&#41;&#41;
		item = NULL;

Find

if &#40; ent-&#62;client-&#62;pers.invent&#111;ry&#91;ITEM_INDEX&#40;FindItem&#40;&#34;shells&#34;&#41;&#41;&#93;
		&&  ent-&#62;client-&#62;pers.invent&#111;ry&#91;ITEM_INDEX&#40;FindItem&#40;&#34;sh&#111;tgun&#34;&#41;&#41;&#93; &#41;
	{
		ent-&#62;client-&#62;newweap&#111;n = FindItem &#40;&#34;sh&#111;tgun&#34;&#41;;
		return;
	}
	ent-&#62;client-&#62;newweap&#111;n = FindItem &#40;&#34;Blaster&#34;&#41;;
}

Replace with

if &#40; ent-&#62;client-&#62;pers.invent&#111;ry&#91;ITEM_INDEX&#40;FindItem&#40;&#34;shells&#34;&#41;&#41;&#93;
		&&  ent-&#62;client-&#62;pers.invent&#111;ry&#91;ITEM_INDEX&#40;FindItem&#40;&#34;sh&#111;tgun&#34;&#41;&#41;&#93; &#41;
	{
		ent-&#62;client-&#62;newweap&#111;n = FindItem &#40;&#34;sh&#111;tgun&#34;&#41;;
		return;
	}
	ent-&#62;client-&#62;newweap&#111;n = FindItem &#40;&#34;Hands&#34;&#41;;
}

Find

item = FindItem&#40;&#34;Blaster&#34;&#41;;
        client-&#62;pers.selected_item = ITEM_INDEX&#40;item&#41;;
        client-&#62;pers.invent&#111;ry&#91;client-&#62;pers.selected_item&#93; = 1;

Replace with

item = FindItem&#40;&#34;Hands&#34;&#41;;
        client-&#62;pers.selected_item = ITEM_INDEX&#40;item&#41;;
        client-&#62;pers.invent&#111;ry&#91;client-&#62;pers.selected_item&#93; = 1;

There you go! Now go punch some Strogg, and go punch and humiliate your foes.

Post comment Comments

SvenBoogie - Feb 12 2006 - 1 comments

Why is this in the f.e.a.r. section?

Reply Good karma Bad karma+1 vote

Author

Paril - Feb 12 2006 - 24 comments

Shouldn't be..?

Reply Good karma+1 vote

MOST - Jun 5 2010 - 115 comments

good

flobblob - Jul 28 2010 - 33 comments

Jesus! Look at all the coding! When I tried to do even a basic mod with quake 3 and just changed the rocket speed, then clicked compile, It wrecked the game. It always happens to what I do with other ones like Doom.

KOYK_GR - Jun 27 2016 - 593 comments

man you are ok,believe it...me? i don't even know how to compile.

Guest - Apr 27 2021 - 691,743 comments

Man this code doesn't work!
First I wasn't able to find some lines (maybe the source code changed?) second, please can you add some files to make it easy for people who only want to play?

Adding a new weapon (Melee) tutorial

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