machinegun.qc

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#include "machinegun.qh"
 
#ifdef SVQC
 
.float machinegun_spread_accumulation;
.float spreadUpdateTime;
 
ERASEABLE
void MachineGun_Update_Spread(entity actor, .entity weaponentity)
{
    float spread_accum = actor.(weaponentity).machinegun_spread_accumulation;
 
    // time based spread decay
    if (WEP_CVAR(WEP_MACHINEGUN, spread_decay))
    {
        float spreadSpectrumDistance = fabs(WEP_CVAR(WEP_MACHINEGUN, spread_max) - WEP_CVAR(WEP_MACHINEGUN, spread_min));
        float timediff = time - actor.(weaponentity).spreadUpdateTime;
        spread_accum = bound(0,
            spread_accum - (timediff * WEP_CVAR(WEP_MACHINEGUN, spread_decay)),
            spreadSpectrumDistance);
    }
    else // legacy behavior for Nexuiz weapon balance
    {
        spread_accum = bound(WEP_CVAR(WEP_MACHINEGUN, spread_min),
            (WEP_CVAR(WEP_MACHINEGUN, spread_add) * actor.(weaponentity).misc_bulletcounter),
            WEP_CVAR(WEP_MACHINEGUN, spread_max));
    }
 
    actor.(weaponentity).machinegun_spread_accumulation = spread_accum;
    actor.(weaponentity).spreadUpdateTime = time;
}
 
ERASEABLE
float MachineGun_Heat(float spread_accum)
{
    // function for reducing mg's damage with no spread and adding damage with
    // heated up barrel or vice versa depending on the values of exposed cvars
    float heatMultiplierApplicationPercent = 0.5;
    float coldMultiplierApplicationPercent = 0.5;
 
    float spreadSpectrumDistance = fabs(WEP_CVAR(WEP_MACHINEGUN, spread_max) - WEP_CVAR(WEP_MACHINEGUN, spread_min));
 
    if (spreadSpectrumDistance > 0) // avoid division by 0, can never be < 0 either due to how it is set when defined
    {
        heatMultiplierApplicationPercent = spread_accum / spreadSpectrumDistance;
        coldMultiplierApplicationPercent = 1 - heatMultiplierApplicationPercent;
    }
 
    // example where low end has halved damage and high end has tripled damage:
    // with 50% spread accumulation: heat = (0.5 * 0.5) + (0.5 * 3) = 0.25 + 1.5 = 1.75 damage multiplier
    // with 90% spread accumulation: heat = (0.1 * 0.5) + (0.9 * 3) = 0.05 + 2.7 = 2.75 damage multiplier
    // NOTE: multipliers do not apply when unset for compatibility
    float cold_multiplier = WEP_CVAR(WEP_MACHINEGUN, spread_cold_damagemultiplier);
    float heat_multiplier = WEP_CVAR(WEP_MACHINEGUN, spread_heat_damagemultiplier);
    return (cold_multiplier ? coldMultiplierApplicationPercent * cold_multiplier : coldMultiplierApplicationPercent)
         + (heat_multiplier ? heatMultiplierApplicationPercent * heat_multiplier : heatMultiplierApplicationPercent);
}
 
void W_MachineGun_Attack(Weapon thiswep, int deathtype, entity actor, .entity weaponentity)
{
    W_SetupShot(actor, weaponentity, true, 0, SND_MACHINEGUN_FIRE, CH_WEAPON_A, ((actor.(weaponentity).misc_bulletcounter == 1) ? WEP_CVAR(WEP_MACHINEGUN, first_damage) : WEP_CVAR(WEP_MACHINEGUN, sustained_damage)), deathtype);
 
    if(!autocvar_g_norecoil)
    {
        actor.punchangle_x = random() - 0.5;
        actor.punchangle_y = random() - 0.5;
    }
 
    // this attack_finished just enforces a cooldown at the end of a burst
    ATTACK_FINISHED(actor, weaponentity) = time + WEP_CVAR(WEP_MACHINEGUN, first_refire) * W_WeaponRateFactor(actor);
 
    float spread_accuracy = (IS_DUCKED(actor) && IS_ONGROUND(actor))
        ? WEP_CVAR(WEP_MACHINEGUN, spread_crouchmod)
        : 1;
 
    if(actor.(weaponentity).misc_bulletcounter == 1)
        fireBullet_falloff(actor, weaponentity, w_shotorg, w_shotdir,
                           WEP_CVAR(WEP_MACHINEGUN, first_spread) * spread_accuracy,
                           WEP_CVAR(WEP_MACHINEGUN, solidpenetration),
                           WEP_CVAR(WEP_MACHINEGUN, first_damage),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_halflife),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_mindist),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_maxdist),
                           0,
                           WEP_CVAR(WEP_MACHINEGUN, first_force),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_forcehalflife),
                           deathtype, EFFECT_BULLET, true);
    else
        fireBullet_falloff(actor, weaponentity, w_shotorg, w_shotdir,
                           WEP_CVAR(WEP_MACHINEGUN, sustained_spread) * spread_accuracy,
                           WEP_CVAR(WEP_MACHINEGUN, solidpenetration),
                           WEP_CVAR(WEP_MACHINEGUN, sustained_damage),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_halflife),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_mindist),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_maxdist),
                           0,
                           WEP_CVAR(WEP_MACHINEGUN, sustained_force),
                           WEP_CVAR(WEP_MACHINEGUN, damagefalloff_forcehalflife),
                           deathtype, EFFECT_BULLET, true);
 
    W_MuzzleFlash(thiswep, actor, weaponentity, w_shotorg, w_shotdir);
 
    // casing code
    if(autocvar_g_casings >= 2)
    {
        makevectors(actor.v_angle); // for some reason, this is lost
        SpawnCasing(((random() * 50 + 50) * v_right) - (v_forward * (random() * 25 + 25)) - ((random() * 5 - 70) * v_up), vectoangles(v_forward), 3, actor, weaponentity);
    }
 
    if(actor.(weaponentity).misc_bulletcounter == 1)
        W_DecreaseAmmo(thiswep, actor, WEP_CVAR(WEP_MACHINEGUN, first_ammo), weaponentity);
    else
        W_DecreaseAmmo(thiswep, actor, WEP_CVAR(WEP_MACHINEGUN, sustained_ammo), weaponentity);
}
 
// weapon frames
void W_MachineGun_Attack_Frame(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    if(actor.(weaponentity).m_weapon != actor.(weaponentity).m_switchweapon || !weapon_prepareattack_check(thiswep, actor, weaponentity, (fire & 2), -1)) // abort immediately if switching
    {
        w_ready(thiswep, actor, weaponentity, fire);
        return;
    }
    if(PHYS_INPUT_BUTTON_ATCK(actor))
    {
        if(!thiswep.wr_checkammo2(thiswep, actor, weaponentity))
        if(!(actor.items & IT_UNLIMITED_AMMO))
        {
            W_SwitchWeapon_Force(actor, w_getbestweapon(actor, weaponentity), weaponentity);
            w_ready(thiswep, actor, weaponentity, fire);
            return;
        }
        ++actor.(weaponentity).misc_bulletcounter;
        W_MachineGun_Attack(thiswep, thiswep.m_id, actor, weaponentity);
        weapon_thinkf(actor, weaponentity, WFRAME_FIRE1, WEP_CVAR(WEP_MACHINEGUN, sustained_refire), W_MachineGun_Attack_Frame);
    }
    else
        weapon_thinkf(actor, weaponentity, WFRAME_FIRE1, WEP_CVAR(WEP_MACHINEGUN, sustained_refire), w_ready);
}
 
 
void W_MachineGun_Attack_Auto(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    if(!(fire & 1) || !weapon_prepareattack_check(thiswep, actor, weaponentity, false, -1))
    {
        w_ready(thiswep, actor, weaponentity, fire);
        return;
    }
 
    if(!thiswep.wr_checkammo1(thiswep, actor, weaponentity))
    if(!(actor.items & IT_UNLIMITED_AMMO))
    {
        W_SwitchWeapon_Force(actor, w_getbestweapon(actor, weaponentity), weaponentity);
        w_ready(thiswep, actor, weaponentity, fire);
        return;
    }
 
    W_DecreaseAmmo(thiswep, actor, WEP_CVAR(WEP_MACHINEGUN, sustained_ammo), weaponentity);
 
    W_SetupShot(actor, weaponentity, true, 0, SND_MACHINEGUN_FIRE, CH_WEAPON_A, WEP_CVAR(WEP_MACHINEGUN, sustained_damage), thiswep.m_id);
    if(!autocvar_g_norecoil)
    {
        actor.punchangle_x = random() - 0.5;
        actor.punchangle_y = random() - 0.5;
    }
 
    MachineGun_Update_Spread(actor, weaponentity);
 
    float spread_accum = actor.(weaponentity).machinegun_spread_accumulation;
 
    float heat = MachineGun_Heat(spread_accum);
 
    float spread_accuracy;
    if (WEP_CVAR(WEP_MACHINEGUN, spread_min) < WEP_CVAR(WEP_MACHINEGUN, spread_max))
        spread_accuracy = WEP_CVAR(WEP_MACHINEGUN, spread_min) + spread_accum;
    else // inverted
        spread_accuracy = WEP_CVAR(WEP_MACHINEGUN, spread_min) - spread_accum;
 
    if (IS_DUCKED(actor) && IS_ONGROUND(actor))
        spread_accuracy *= WEP_CVAR(WEP_MACHINEGUN, spread_crouchmod);
 
    fireBullet_falloff(actor, weaponentity, w_shotorg, w_shotdir,
                       spread_accuracy,
                       WEP_CVAR(WEP_MACHINEGUN, solidpenetration),
                       WEP_CVAR(WEP_MACHINEGUN, sustained_damage) * heat,
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_halflife),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_mindist),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_maxdist),
                       0,
                       WEP_CVAR(WEP_MACHINEGUN, sustained_force),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_forcehalflife),
                       thiswep.m_id, EFFECT_BULLET, true);
 
    ++actor.(weaponentity).misc_bulletcounter;
 
    spread_accum += WEP_CVAR(WEP_MACHINEGUN, spread_add);
 
    actor.(weaponentity).machinegun_spread_accumulation = spread_accum;
 
    W_MuzzleFlash(thiswep, actor, weaponentity, w_shotorg, w_shotdir);
 
    if(autocvar_g_casings >= 2) // casing code
    {
        makevectors(actor.v_angle); // for some reason, this is lost
        SpawnCasing(((random() * 50 + 50) * v_right) - (v_forward * (random() * 25 + 25)) - ((random() * 5 - 70) * v_up), vectoangles(v_forward), 3, actor, weaponentity);
    }
 
    ATTACK_FINISHED(actor, weaponentity) = time + WEP_CVAR(WEP_MACHINEGUN, first_refire) * W_WeaponRateFactor(actor);
    weapon_thinkf(actor, weaponentity, WFRAME_FIRE1, WEP_CVAR(WEP_MACHINEGUN, sustained_refire), W_MachineGun_Attack_Auto);
}
 
void W_MachineGun_Attack_Burst(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    W_SetupShot(actor, weaponentity, true, 0, SND_MACHINEGUN_FIRE, CH_WEAPON_A, WEP_CVAR(WEP_MACHINEGUN, sustained_damage), thiswep.m_id);
    if(!autocvar_g_norecoil)
    {
        actor.punchangle_x = random() - 0.5;
        actor.punchangle_y = random() - 0.5;
    }
 
    MachineGun_Update_Spread(actor, weaponentity);
 
    float spread_accum = actor.(weaponentity).machinegun_spread_accumulation;
 
    float heat = MachineGun_Heat(spread_accum);
 
    float spread_accuracy = WEP_CVAR(WEP_MACHINEGUN, burst_spread);
    if (IS_DUCKED(actor) && IS_ONGROUND(actor))
        spread_accuracy *= WEP_CVAR(WEP_MACHINEGUN, spread_crouchmod);
 
    fireBullet_falloff(actor, weaponentity, w_shotorg, w_shotdir,
                       spread_accuracy,
                       WEP_CVAR(WEP_MACHINEGUN, solidpenetration),
                       WEP_CVAR(WEP_MACHINEGUN, sustained_damage) * heat,
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_halflife),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_mindist),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_maxdist),
                       0,
                       WEP_CVAR(WEP_MACHINEGUN, sustained_force),
                       WEP_CVAR(WEP_MACHINEGUN, damagefalloff_forcehalflife),
                       thiswep.m_id, EFFECT_BULLET, true);
 
    W_MuzzleFlash(thiswep, actor, weaponentity, w_shotorg, w_shotdir);
 
    if(autocvar_g_casings >= 2) // casing code
    {
        makevectors(actor.v_angle); // for some reason, this is lost
        SpawnCasing(((random() * 50 + 50) * v_right) - (v_forward * (random() * 25 + 25)) - ((random() * 5 - 70) * v_up), vectoangles(v_forward), 3, actor, weaponentity);
    }
 
    spread_accum += WEP_CVAR(WEP_MACHINEGUN, spread_add);
 
    actor.(weaponentity).machinegun_spread_accumulation = spread_accum;
 
    ++actor.(weaponentity).misc_bulletcounter;
    if(actor.(weaponentity).misc_bulletcounter == 0)
    {
        ATTACK_FINISHED(actor, weaponentity) = time + WEP_CVAR(WEP_MACHINEGUN, burst_refire2) * W_WeaponRateFactor(actor);
        weapon_thinkf(actor, weaponentity, WFRAME_FIRE2, WEP_CVAR(WEP_MACHINEGUN, burst_animtime), w_ready);
    }
    else
    {
        weapon_thinkf(actor, weaponentity, WFRAME_FIRE2, WEP_CVAR(WEP_MACHINEGUN, burst_refire), W_MachineGun_Attack_Burst);
    }
 
}
 
METHOD(MachineGun, wr_aim, void(entity thiswep, entity actor, .entity weaponentity))
{
    if(vdist(actor.origin - actor.enemy.origin, <, 3000 - bound(0, skill, 10) * 200))
        PHYS_INPUT_BUTTON_ATCK(actor) = bot_aim(actor, weaponentity, 1000000, 0, 0.001, false, true);
    else
        PHYS_INPUT_BUTTON_ATCK2(actor) = bot_aim(actor, weaponentity, 1000000, 0, 0.001, false, true);
}
 
METHOD(MachineGun, wr_think, void(entity thiswep, entity actor, .entity weaponentity, int fire))
{
    // forced reload - wait until the bulletcounter is 0 so a burst loop can finish
    if (WEP_CVAR(WEP_MACHINEGUN, reload_ammo)
    && actor.(weaponentity).clip_load < min(max(WEP_CVAR(WEP_MACHINEGUN, sustained_ammo), WEP_CVAR(WEP_MACHINEGUN, first_ammo)), WEP_CVAR(WEP_MACHINEGUN, burst_ammo))
    && actor.(weaponentity).misc_bulletcounter >= 0)
    {
        thiswep.wr_reload(thiswep, actor, weaponentity);
    }
    else if(WEP_CVAR(WEP_MACHINEGUN, mode) == 1)
    {
        if(fire & 1)
        if(weapon_prepareattack(thiswep, actor, weaponentity, false, 0))
        {
            actor.(weaponentity).misc_bulletcounter = 0;
            W_MachineGun_Attack_Auto(thiswep, actor, weaponentity, fire);
        }
 
        // You can "shoot" more rounds than what's "used", and vice versa.
        if(fire & 2)
        if(weapon_prepareattack(thiswep, actor, weaponentity, true, 0))
        {
            if(!thiswep.wr_checkammo2(thiswep, actor, weaponentity))
            if(!(actor.items & IT_UNLIMITED_AMMO))
            {
                W_SwitchWeapon_Force(actor, w_getbestweapon(actor, weaponentity), weaponentity);
                w_ready(thiswep, actor, weaponentity, fire);
                return;
            }
 
            float ammo_available;
            if (WEP_CVAR(WEP_MACHINEGUN, reload_ammo) > 0)
            {
                ammo_available = actor.(weaponentity).clip_load;
            }
            else
            {
                ammo_available = GetResource(actor, thiswep.ammo_type);
            }
 
            int to_shoot = WEP_CVAR(WEP_MACHINEGUN, burst);
            if(!(actor.items & IT_UNLIMITED_AMMO))
            {
                // We don't want to shoot 3 rounds if there's 2 left in the mag, so we'll use a fraction.
                // Also keep the fraction <= 1 otherwise we'd mag dump in one burst.
                float burst_fraction = min(1, ammo_available / WEP_CVAR(WEP_MACHINEGUN, burst_ammo));
                to_shoot = floor(to_shoot * burst_fraction);
 
                // We also don't want to use 3 rounds if there's only 2 left.
                int to_use = min(WEP_CVAR(WEP_MACHINEGUN, burst_ammo), ammo_available);
                W_DecreaseAmmo(thiswep, actor, to_use, weaponentity);
            }
 
            // Bursting counts up to 0 from a negative.
            actor.(weaponentity).misc_bulletcounter = -to_shoot;
            W_MachineGun_Attack_Burst(thiswep, actor, weaponentity, fire);
        }
    }
    else
    {
 
        if(fire & 1)
        if(weapon_prepareattack(thiswep, actor, weaponentity, false, 0))
        {
            actor.(weaponentity).misc_bulletcounter = 1;
            W_MachineGun_Attack(thiswep, thiswep.m_id, actor, weaponentity); // sets attack_finished
            weapon_thinkf(actor, weaponentity, WFRAME_FIRE1, WEP_CVAR(WEP_MACHINEGUN, sustained_refire), W_MachineGun_Attack_Frame);
        }
 
        if((fire & 2) && WEP_CVAR(WEP_MACHINEGUN, first))
        if(weapon_prepareattack(thiswep, actor, weaponentity, true, 0))
        {
            actor.(weaponentity).misc_bulletcounter = 1;
            W_MachineGun_Attack(thiswep, thiswep.m_id | HITTYPE_SECONDARY, actor, weaponentity); // sets attack_finished
            weapon_thinkf(actor, weaponentity, WFRAME_FIRE2, WEP_CVAR(WEP_MACHINEGUN, first_refire), w_ready);
        }
    }
}
 
METHOD(MachineGun, wr_checkammo1, bool(entity thiswep, entity actor, .entity weaponentity))
{
    float ammo_amount;
    if(WEP_CVAR(WEP_MACHINEGUN, mode) == 1)
        ammo_amount = GetResource(actor, thiswep.ammo_type) >= WEP_CVAR(WEP_MACHINEGUN, sustained_ammo);
    else
        ammo_amount = GetResource(actor, thiswep.ammo_type) >= WEP_CVAR(WEP_MACHINEGUN, first_ammo);
 
    if(WEP_CVAR(WEP_MACHINEGUN, reload_ammo))
    {
        if(WEP_CVAR(WEP_MACHINEGUN, mode) == 1)
            ammo_amount += actor.(weaponentity).(weapon_load[thiswep.m_id]) >= WEP_CVAR(WEP_MACHINEGUN, sustained_ammo);
        else
            ammo_amount += actor.(weaponentity).(weapon_load[thiswep.m_id]) >= WEP_CVAR(WEP_MACHINEGUN, first_ammo);
    }
 
    return ammo_amount;
}
 
METHOD(MachineGun, wr_checkammo2, bool(entity thiswep, entity actor, .entity weaponentity))
{
    float ammo_amount;
    float burst_ammo_per_shot = WEP_CVAR(WEP_MACHINEGUN, burst_ammo) / WEP_CVAR(WEP_MACHINEGUN, burst);
 
    if(WEP_CVAR(WEP_MACHINEGUN, mode) == 1)
        ammo_amount = GetResource(actor, thiswep.ammo_type) >= burst_ammo_per_shot;
    else
        ammo_amount = GetResource(actor, thiswep.ammo_type) >= WEP_CVAR(WEP_MACHINEGUN, first_ammo);
 
    if(WEP_CVAR(WEP_MACHINEGUN, reload_ammo))
    {
        if(WEP_CVAR(WEP_MACHINEGUN, mode) == 1)
            ammo_amount += actor.(weaponentity).(weapon_load[thiswep.m_id]) >= burst_ammo_per_shot;
        else
            ammo_amount += actor.(weaponentity).(weapon_load[thiswep.m_id]) >= WEP_CVAR(WEP_MACHINEGUN, first_ammo);
    }
 
    return ammo_amount;
}
 
METHOD(MachineGun, wr_reload, void(entity thiswep, entity actor, .entity weaponentity))
{
    if(actor.(weaponentity).misc_bulletcounter < 0)
        return;
    W_Reload(actor, weaponentity, min(max(WEP_CVAR(WEP_MACHINEGUN, sustained_ammo), WEP_CVAR(WEP_MACHINEGUN, first_ammo)), WEP_CVAR(WEP_MACHINEGUN, burst_ammo)), SND_RELOAD);
}
 
METHOD(MachineGun, wr_suicidemessage, Notification(entity thiswep))
{
    return WEAPON_THINKING_WITH_PORTALS;
}
 
METHOD(MachineGun, wr_killmessage, Notification(entity thiswep))
{
    if(w_deathtype & HITTYPE_SECONDARY)
        return WEAPON_MACHINEGUN_MURDER_SNIPE;
    else
        return WEAPON_MACHINEGUN_MURDER_SPRAY;
}
 
#endif
#ifdef CSQC
 
METHOD(MachineGun, wr_impacteffect, void(entity thiswep, entity actor))
{
    vector org2 = w_org + w_backoff * 2;
    pointparticles(EFFECT_MACHINEGUN_IMPACT, org2, w_backoff * 1000, 1);
    if(!w_issilent)
        sound(actor, CH_SHOTS, SND_RIC_RANDOM(), VOL_BASE, ATTN_NORM);
}
 
#endif
#ifdef MENUQC
#include <common/items/item/ammo.qh>
 
METHOD(MachineGun, describe, string(MachineGun this))
{
    TC(MachineGun, this);
    PAGE_TEXT_INIT();
    PAR(_("The %s quickly fires bullets with a small degree of spread."), COLORED_NAME(this));
    PAR(_("The secondary fire fires a quick burst of bullets faster than the primary fire and with no spread, but there's a short delay until it can be used again."));
    PAR(_("It consumes %s ammo for each bullet shot, until the whole magazine is emptied."), COLORED_NAME(ITEM_Bullets));
    PAR(_("The %s can be used in a lot of situations, and it works particularly well at long ranges since the bullets pierce the sky instantaneously. "
          "Since the secondary fire has no spread, it's the better option when firing over a long range."), COLORED_NAME(this));
    PAR(W_Guide_Keybinds(this));
    PAR(W_Guide_DPS_secondaryMultishot(this.netname, "sustained", "burst", "burst", "burst_refire2", false));
    return PAGE_TEXT;
}
 
#endif