Gatling Gun

Author: Drywall
Source: https://www.insideqc.com/qctut/qctut-10.shtml

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Step 1

This tutorial will teach you how to turn the nailgun into a gatling gun ala doom. First, you need to open weapons.qc and go until the line "void() player_nail1; and write this:

void()      player_gat1;  // gatling gun firing (see later)

Step 2

Now, further in weapons.qc, find the line: .float hit_z;. Above it, add this:

void(float ox, float ox2) W_FireGatSpikes =  // this is a slightly modified version of firespikes
{
    local vector    dir;
    local entity    old;

    makevectors (self.v_angle);

    if (self.ammo_nails <1)
    {
        self.weapon = W_BestWeapon();
        W_SetCurrentAmmo ();
        return;
    }
    sound (self, chan_weapon, "weapons/rocket1i.wav", 1, attn_norm);
    self.attack_finished = time + 0.2;
    self.currentammo = self.ammo_nails = self.ammo_nails - 1;
    dir = aim (self, 1000);
    launch_spike (self.origin + '0 0 16' + v_right*ox + v_up*ox2, dir); // sets spike direction

    self.punchangle_x = -2;
};


/*
===============
launch_gatling
===============
*/
void(vector org, vector dir) launch_gatling =
{
    newmis = spawn ();
    newmis.owner = self;
    newmis.movetype = MOVETYPE_FLYMISSILE;
    newmis.solid = SOLID_BBOX;

    newmis.angles = vectoangles(dir);

    newmis.touch = spike_touch;
    newmis.classname = "spike";
    newmis.think = SUB_Remove;
    newmis.nextthink = time + 6;
    setmodel (newmis, "progs/spike.mdl");
    setsize (newmis, VEC_ORIGIN, VEC_ORIGIN);
    setorigin (newmis, org);

    newmis.velocity = dir * 1000;
};

void() W_FireGatling =
{
    local vector    dir;
    local entity    old;

    sound (self, CHAN_WEAPON, "weapons/spike2.wav", 1, ATTN_NORM);
    self.attack_finished = time + 0.2;
    self.currentammo = self.ammo_nails = self.ammo_nails - 2;
    dir = aim (self, 1000);
    launch_gatling (self.origin + '0 0 16', dir);
    newmis.touch = superspike_touch;
    setmodel (newmis, "progs/s_spike.mdl");
    setsize (newmis, VEC_ORIGIN, VEC_ORIGIN);
    self.punchangle_x = -2;
};

Step 3

Now open up player.qc. Above the line void() player_light1 =[$light1, player_light2 ], insert these lines:

void() player_gat1   =[$nailatt1, player_gat2  ]  // runs gat2 next
{
        self.effects = self.effects | EF_MUZZLEFLASH;

        if (!self.button0)
                {player_run ();return;}
        self.weaponframe = self.weaponframe + 1;
        if (self.weaponframe == 9)
                self.weaponframe = 1;
        SuperDamageSound();
        W_FireGatSpikes (-8, 0);  // fires a spike to the left
        self.attack_finished = time + 0.2;
};
void() player_gat2   =[$nailatt2, player_gat3  ]  // runs gat3 next
{
        self.effects = self.effects | EF_MUZZLEFLASH;

        if (!self.button0)
                {player_run ();return;}
        self.weaponframe = self.weaponframe + 1;
        if (self.weaponframe == 9)
                self.weaponframe = 1;
        SuperDamageSound();
        W_FireGatSpikes (0, 8);  // fires a spike up
        self.attack_finished = time + 0.2;
};
void() player_gat3   =[$nailatt1, player_gat4  ]  // runs gat4 next
{
        self.effects = self.effects | EF_MUZZLEFLASH;

        if (!self.button0)
                {player_run ();return;}
        self.weaponframe = self.weaponframe + 1;
        if (self.weaponframe == 9)
                self.weaponframe = 1;
        SuperDamageSound();
        W_FireGatSpikes (8, 0);  // fires a spike to the right
        self.attack_finished = time + 0.2;
};
void() player_gat4   =[$nailatt2, player_gat1  ]  // back to 1
{
        self.effects = self.effects | EF_MUZZLEFLASH;

        if (!self.button0)
                {player_run ();return;}
        self.weaponframe = self.weaponframe + 1;
        if (self.weaponframe == 9)
                self.weaponframe = 1;
        SuperDamageSound();
        W_FireGatSpikes (0, -8);  // fires a spike down
        self.attack_finished = time + 0.2;
};

Step 4

Now find the W_Attack function in weapons.qc. Change these lines:

else if (self.weapon == IT_SUPER_NAILGUN)
{
        player_nail1 ();
}

Add in these lines:

else if (self.weapon == IT_SUPER_NAILGUN)
{
        player_gat1 ();
}

Step 5

Woohoo! You're all ready to compile and run. Have fun...

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Tags: tutorial, quakec, qc, insideqc, weapon