weaponsystem.qc

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#include "weaponsystem.qh"

#include <common/animdecide.qh>
#include <common/constants.qh>
#include <common/items/_mod.qh>
#include <common/mapobjects/platforms.qh>
#include <common/monsters/_mod.qh>
#include <common/mutators/mutator/status_effects/_mod.qh>
#include <common/net_linked.qh>
#include <common/notifications/all.qh>
#include <common/resources/sv_resources.qh>
#include <common/state.qh>
#include <common/util.qh>
#include <common/vehicles/all.qh>
#include <common/weapons/_all.qh>
#include <common/wepent.qh>
#include <lib/csqcmodel/sv_model.qh>
#include <server/cheats.qh>
#include <server/client.qh>
#include <server/command/common.qh>
#include <server/damage.qh>
#include <server/items/items.qh>
#include <server/hook.qh>
#include <server/mutators/_mod.qh>
#include <server/round_handler.qh>
#include <server/weapons/selection.qh>
#include <server/world.qh>

.int state;

.float weapon_frametime;

float W_WeaponRateFactor(entity this)
{
    float t = 1;
    if(autocvar_g_weaponratefactor > 0)
        t = 1.0 / autocvar_g_weaponratefactor;

    MUTATOR_CALLHOOK(WeaponRateFactor, t, this);
    t = M_ARGV(0, float);

    return t;
}

float W_WeaponSpeedFactor(entity this)
{
    float t = 1.0 * autocvar_g_weaponspeedfactor;

    MUTATOR_CALLHOOK(WeaponSpeedFactor, t, this);
    t = M_ARGV(0, float);

    return t;
}


bool CL_Weaponentity_CustomizeEntityForClient(entity this, entity client)
{
    this.viewmodelforclient = this.owner;
    if (IS_SPEC(client) && client.enemy == this.owner) this.viewmodelforclient = client;
    return false;
}

vector CL_Weapon_GetShotOrg(int wpn)
{
    entity wi = REGISTRY_GET(Weapons, wpn);
    entity e = spawn();
    CL_WeaponEntity_SetModel(e, wi.mdl, false);
    vector ret = e.movedir;
    CL_WeaponEntity_SetModel(e, "", false);
    delete(e);
    return ret;
}

.float m_alpha;
.string w_weaponname;
.int w_dmg;
.int w_deadflag;

void CL_Weaponentity_Think(entity this)
{
    this.nextthink = time;
    if (game_stopped) this.frame = this.anim_idle.x;
    .entity weaponentity = this.weaponentity_fld;
    if (this.owner.(weaponentity) != this)
    {
        // owner has new gun; remove old one
        if (this.weaponchild) delete(this.weaponchild);
        if (this.hook) delete(this.hook);
        delete(this);
        return;
    }
    if (IS_DEAD(this.owner))
    {
        // owner died; disappear
        this.model = "";
        if (this.weaponchild) this.weaponchild.model = "";
        return;
    }
    if (this.w_weaponname != this.weaponname || this.w_dmg != this.modelindex || this.w_deadflag != this.deadflag)
    {
        // owner changed weapons; update appearance
        this.w_weaponname = this.weaponname;
        this.w_dmg = this.modelindex;
        this.w_deadflag = this.deadflag;

        CL_WeaponEntity_SetModel(this, this.weaponname, true);
    }

    this.alpha = -1;  // TODO: don't render this entity at all

    if (this.owner.alpha == default_player_alpha) this.m_alpha = default_weapon_alpha;
    else if (this.owner.alpha != 0) this.m_alpha = this.owner.alpha;
    else this.m_alpha  = 1;

    if (this.weaponchild)
    {
        this.weaponchild.alpha = this.alpha;
        this.weaponchild.effects = this.effects;
    }
}

void CL_ExteriorWeaponentity_Think(entity this)
{
    this.nextthink = time;
    .entity weaponentity = this.weaponentity_fld;
    entity w_ent = this.owner.(weaponentity);
    if (this.owner.exteriorweaponentity != this)
    {
        delete(this);
        return;
    }
    if (IS_DEAD(this.owner))
    {
        this.model = "";
        return;
    }
    if (this.weaponname != w_ent.weaponname || this.dmg != w_ent.modelindex || this.deadflag != w_ent.deadflag)
    {
        this.weaponname = w_ent.weaponname;
        this.dmg = w_ent.modelindex;
        this.deadflag = w_ent.deadflag;
        if (w_ent.weaponname != "")
        {
            _setmodel(this, W_Model(strcat("v_", w_ent.weaponname, ".md3")));
            setsize(this, '0 0 0', '0 0 0');
        }
        else this.model = "";

        int tag_found;
        if ((tag_found = gettagindex(this.owner, "tag_weapon")))
        {
            this.tag_index = tag_found;
            this.tag_entity = this.owner;
        }
        else
        {
            setattachment(this, this.owner, "bip01 r hand");
        }
    }
    this.effects = this.owner.effects;
    this.effects |= EF_LOWPRECISION;
    this.effects = this.effects & EFMASK_CHEAP;  // eat performance
    if (this.owner.alpha == default_player_alpha) this.alpha = default_weapon_alpha;
    else if (this.owner.alpha != 0) this.alpha = this.owner.alpha;
    else this.alpha = 1;

    Weapon wep = this.owner.(weaponentity).m_weapon;
    if (wep) this.glowmod = weaponentity_glowmod(wep, this.owner, this.owner.clientcolors, this.owner.(weaponentity));
    this.colormap = this.owner.colormap;
    this.skin = w_ent.skin;

    CSQCMODEL_AUTOUPDATE(this);
}

// spawning weaponentity for client
void CL_SpawnWeaponentity(entity actor, .entity weaponentity)
{
    entity w_ent = actor.(weaponentity) = new(weaponentity);
    w_ent.solid = SOLID_NOT;
    w_ent.owner = actor;
    setmodel(w_ent, MDL_Null);  // precision set when changed
    setorigin(w_ent, '0 0 0');
    w_ent.weaponentity_fld = weaponentity;
    setthink(w_ent, CL_Weaponentity_Think);
    w_ent.nextthink = time;
    w_ent.viewmodelforclient = actor;
    w_ent.draggable = drag_undraggable;
    setcefc(w_ent, CL_Weaponentity_CustomizeEntityForClient);

    wepent_link(w_ent);

    if (weaponentity == weaponentities[0]) // only one exterior model, thank you very much
    {
        entity exterior = actor.exteriorweaponentity = new(exteriorweaponentity);
        exterior.solid = SOLID_NOT;
        exterior.owner = actor;
        exterior.draggable = drag_undraggable;
        exterior.weaponentity_fld = weaponentity;
        setorigin(exterior, '0 0 0');
        setthink(exterior, CL_ExteriorWeaponentity_Think);
        exterior.nextthink = time;

        CSQCMODEL_AUTOINIT(exterior);
    }
}

// Weapon subs
void w_clear(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    entity w_ent = actor.(weaponentity);
    if (w_ent)
    {
        w_ent.m_weapon = WEP_Null;
        w_ent.m_switchingweapon = WEP_Null;
        w_ent.state = WS_CLEAR;
        w_ent.effects = 0;
    }
}

void w_ready(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    entity w_ent = actor.(weaponentity);
    if (w_ent) w_ent.state = WS_READY;
    weapon_thinkf(actor, weaponentity, WFRAME_IDLE, 1000000, w_ready);
}

.float prevdryfire;
.float prevwarntime;
bool weapon_prepareattack_checkammo(Weapon thiswep, entity actor, bool secondary, .entity weaponentity)
{
    if ((actor.items & IT_UNLIMITED_AMMO)) return true;
    bool ammo = false;
    if (secondary) ammo = thiswep.wr_checkammo2(thiswep, actor, weaponentity);
    else ammo = thiswep.wr_checkammo1(thiswep, actor, weaponentity);
    if (ammo) return true;
    // always keep the Mine Layer if we placed mines, so that we can detonate them
    if (thiswep == WEP_MINE_LAYER)
    {
        IL_EACH(g_mines, it.owner == actor && it.weaponentity_fld == weaponentity,
        {
            return false;
        });
    }

    if (thiswep == WEP_SHOTGUN)
        if (!secondary && WEP_CVAR(shotgun, secondary) == 1) return false;           // no clicking, just allow

    if (thiswep == actor.(weaponentity).m_switchweapon && time - actor.prevdryfire > 1) // only play once BEFORE starting to switch weapons
    {
        sound(actor, CH_WEAPON_A, SND_DRYFIRE, VOL_BASE, ATTEN_NORM);
        actor.prevdryfire = time;
    }

    // check if the other firing mode has enough ammo
    bool ammo_other = false;
    if (secondary) ammo_other = thiswep.wr_checkammo1(thiswep, actor, weaponentity);
    else ammo_other = thiswep.wr_checkammo2(thiswep, actor, weaponentity);
    if (ammo_other)
    {
        if (time - actor.prevwarntime > 1)
            Send_Notification(NOTIF_ONE, actor, MSG_MULTI, ITEM_WEAPON_PRIMORSEC, thiswep.m_id, secondary, (1 - secondary));
        actor.prevwarntime = time;
    }
    else  // this weapon is totally unable to fire, switch to another one
    {
        W_SwitchToOtherWeapon(actor, weaponentity);
    }

    return false;
}

.float race_penalty;
bool weapon_prepareattack_check(Weapon thiswep, entity actor, .entity weaponentity, bool secondary, float attacktime)
{
    if (actor.weaponentity == NULL) return true;
    if (!weapon_prepareattack_checkammo(thiswep, actor, secondary, weaponentity)) return false;

    // if sv_ready_restart_after_countdown is set, don't allow the player to shoot
    // if all players readied up and the countdown is running
    if (time < game_starttime || time < actor.race_penalty) return false;

    if (timeout_status == TIMEOUT_ACTIVE)  // don't allow the player to shoot while game is paused
        return false;

    // do not even think about shooting if switching
    if (actor.(weaponentity).m_switchweapon != actor.(weaponentity).m_weapon) return false;

    if (attacktime >= 0)
    {
        // don't fire if previous attack is not finished
        if (ATTACK_FINISHED(actor, weaponentity) > time + actor.(weaponentity).weapon_frametime * 0.5) return false;
        entity this = actor.(weaponentity);
        // don't fire while changing weapon
        if (this.state != WS_READY) return false;
    }
    return true;
}

void weapon_prepareattack_do(entity actor, .entity weaponentity, bool secondary, float attacktime)
{
    entity this = actor.(weaponentity);
    if (this == NULL) return;
    this.state = WS_INUSE;

    if(StatusEffects_active(STATUSEFFECT_SpawnShield, actor)) // given this is performed often, perform a lighter check first
        StatusEffects_remove(STATUSEFFECT_SpawnShield, actor, STATUSEFFECT_REMOVE_CLEAR); // kill spawn shield when you fire

    // if the weapon hasn't been firing continuously, reset the timer
    if (attacktime >= 0)
    {
        if (ATTACK_FINISHED(actor, weaponentity) < time - this.weapon_frametime * 1.5)
        {
            ATTACK_FINISHED(actor, weaponentity) = time;
            // dprint("resetting attack finished to ", ftos(time), "\n");
        }
        float arate = W_WeaponRateFactor(actor);
        ATTACK_FINISHED(actor, weaponentity) = ATTACK_FINISHED(actor, weaponentity) + attacktime * arate;

        if(autocvar_g_weaponswitch_debug_alternate && W_DualWielding(actor))
        {
            int slot = weaponslot(weaponentity);
            for(int wepslot = 0; wepslot < MAX_WEAPONSLOTS; ++wepslot)
            {
                if(slot == wepslot)
                    continue;
                .entity wepent = weaponentities[wepslot];
                if(actor.(wepent) && actor.(wepent).m_weapon != WEP_Null)
                {
                    if(ATTACK_FINISHED(actor, wepent) > time + actor.(wepent).weapon_frametime * 0.5)
                        continue; // still cooling down!
                    if (ATTACK_FINISHED(actor, wepent) < time - actor.(wepent).weapon_frametime * 1.5)
                        ATTACK_FINISHED(actor, wepent) = time;
                    ATTACK_FINISHED(actor, wepent) = ATTACK_FINISHED(actor, wepent) + (attacktime * arate) / MAX_WEAPONSLOTS;
                }
            }
        }
    }
    this.bulletcounter += 1;
    // dprint("attack finished ", ftos(ATTACK_FINISHED(actor, weaponentity)), "\n");
}

bool weapon_prepareattack(Weapon thiswep, entity actor, .entity weaponentity, bool secondary, float attacktime)
{
    if (weapon_prepareattack_check(thiswep, actor, weaponentity, secondary, attacktime))
    {
        weapon_prepareattack_do(actor, weaponentity, secondary, attacktime);
        return true;
    }
    return false;
}

void weapon_thinkf(entity actor, .entity weaponentity, WFRAME fr, float t, void(Weapon thiswep, entity actor,
    .entity weaponentity, int fire) func)
{
    entity this = actor.(weaponentity);
    if (this == NULL) return;
    bool restartanim;
    if (fr == WFRAME_DONTCHANGE)
    {
        // this can happen when the weapon entity is newly spawned, since it has a clear state and no previous weapon frame
        if (this.wframe == WFRAME_DONTCHANGE)
            this.wframe = WFRAME_IDLE;
        fr = this.wframe;
        restartanim = false;
    }
    else
    {
        restartanim = fr != WFRAME_IDLE;
    }

    this.wframe = fr;

    if (this.weapon_think == w_ready && func != w_ready && this.state == WS_RAISE)
        backtrace("Tried to override initial weapon think function - should this really happen?");

    t *= W_WeaponRateFactor(actor);

    // VorteX: haste can be added here
    if (this.weapon_think == w_ready)
    {
        this.weapon_nextthink = time;
        // dprint("started firing at ", ftos(time), "\n");
    }
    float w_frametime_limit = this.weapon_frametime * 1.5;
    if (this.weapon_nextthink < time - w_frametime_limit || this.weapon_nextthink > time + w_frametime_limit)
    {
        this.weapon_nextthink = time;
        // dprint("reset weapon animation timer at ", ftos(time), "\n");
    }
    this.weapon_nextthink += t;
    this.weapon_think = func;
    // dprint("next ", ftos(this.weapon_nextthink), "\n");

    if (this)
    {
        FOREACH_CLIENT(true, {
            if(it == actor || (IS_SPEC(it) && it.enemy == actor))
                wframe_send(it, this, fr, autocvar_g_weaponratefactor, restartanim);
        });
    }

    if ((fr == WFRAME_FIRE1 || fr == WFRAME_FIRE2) && t)
    {
        bool primary_melee = boolean(fr == WFRAME_FIRE1 && (this.m_weapon.spawnflags & WEP_TYPE_MELEE_PRI));
        bool secondary_melee = boolean(fr == WFRAME_FIRE2 && (this.m_weapon.spawnflags & WEP_TYPE_MELEE_SEC));
        int act = (primary_melee || secondary_melee) ? ANIMACTION_MELEE : ANIMACTION_SHOOT;
        animdecide_setaction(actor, act, restartanim);
    }
    else if (actor.anim_upper_action == ANIMACTION_SHOOT || actor.anim_upper_action == ANIMACTION_MELEE)
    {
        actor.anim_upper_action = 0;
    }
}

bool weaponUseForbidden(entity player)
{
    if (round_handler_IsActive() && !round_handler_IsRoundStarted()) return true;
    if (MUTATOR_CALLHOOK(ForbidWeaponUse, player)) return true;
    return false;
}

bool weaponLocked(entity player)
{
    if (time < game_starttime && !sv_ready_restart_after_countdown) return true;
    if (player.player_blocked) return true;
    if (game_stopped) return true;
    if (STAT(FROZEN, player)) return true;
    if (MUTATOR_CALLHOOK(LockWeapon, player)) return true;
    return false;
}

void W_ResetGunAlign(entity player, int preferred_alignment)
{
    if(W_DualWielding(player))
        preferred_alignment = 3; // right align, the second gun will default to left

    // clear current weapon slots' alignments so we can redo the calculations!
    for(int slot = 0; slot < MAX_WEAPONSLOTS; ++slot)
    {
        .entity weaponentity = weaponentities[slot];
        if (player.(weaponentity))
            player.(weaponentity).m_gunalign = 0;
    }

    // now set the new values
    for(int slot = 0; slot < MAX_WEAPONSLOTS; ++slot)
    {
        .entity weaponentity = weaponentities[slot];
        if (player.(weaponentity))
            player.(weaponentity).m_gunalign = W_GunAlign(player.(weaponentity), preferred_alignment);
    }
}

.bool hook_switchweapon;

void W_WeaponFrame(Player actor, .entity weaponentity)
{
    TC(Player, actor);
    TC(PlayerState, PS(actor));
    entity this = actor.(weaponentity);
    if (frametime) this.weapon_frametime = frametime;

    if (!this || GetResource(actor, RES_HEALTH) < 1) return;  // Dead player can't use weapons and injure impulse commands

    int button_atck = PHYS_INPUT_BUTTON_ATCK(actor);
    int button_atck2 = PHYS_INPUT_BUTTON_ATCK2(actor);

    if (weaponUseForbidden(actor))
        button_atck = button_atck2 = 0; // forbid primary and secondary fire, switching is allowed

    if (weaponLocked(actor))
    {
        if (this.state != WS_CLEAR)
        {
            Weapon wpn = this.m_weapon;
            w_ready(wpn, actor, weaponentity, button_atck | (button_atck2 << 1));
            return;
        }
    }

    if(autocvar_g_weaponswitch_debug == 2 && weaponslot(weaponentity) > 0)
    {
        .entity wepe1 = weaponentities[0];
        entity wep1 = actor.(wepe1);
        this.m_switchweapon = wep1.m_switchweapon;
        entity store = IS_PLAYER(actor) ? PS(actor) : actor;
        if(!(this.m_switchweapon.spawnflags & WEP_FLAG_DUALWIELD) && !(store.dual_weapons & wep1.m_switchweapon.m_wepset))
        {
            this.m_weapon = WEP_Null;
            this.m_switchingweapon = WEP_Null;
            this.m_switchweapon = WEP_Null;
            this.state = WS_CLEAR;
            this.weaponname = "";
            this.clip_load = this.clip_size = this.old_clip_load = 0;
            return;
        }
    }

    if (this.m_switchweapon == WEP_Null)
    {
        if (this.state != WS_CLEAR)
            w_ready(this.m_weapon, actor, weaponentity, button_atck | (button_atck2 << 1));
        this.m_weapon = WEP_Null;
        this.m_switchingweapon = WEP_Null;
        this.state = WS_CLEAR;
        this.weaponname = "";
        this.clip_load = this.clip_size = this.old_clip_load = 0;
        return;
    }

    vector fo, ri, up;
    MAKE_VECTORS(actor.v_angle, fo, ri, up);

    // Change weapon
    if (this.m_weapon != this.m_switchweapon)
    {
        switch (this.state)
        {
            default:
                LOG_WARNF("unhandled weaponentity (%i) state for player (%i): %d", this, actor, this.state);
                break;
            case WS_INUSE:
            case WS_RAISE:
                break;
            case WS_CLEAR:
            {
                // end switching!
                Weapon newwep = this.m_switchweapon;
                this.m_switchingweapon = newwep;

                // the two weapon entities will notice this has changed and update their models
                this.m_weapon = newwep;
                this.weaponname = newwep.mdl;
                this.bulletcounter = 0;
                newwep.wr_setup(newwep, actor, weaponentity);
                this.state = WS_RAISE;

                // set our clip load to the load of the weapon we switched to, if it's reloadable
                if ((newwep.spawnflags & WEP_FLAG_RELOADABLE) && newwep.reloading_ammo)  // prevent accessing undefined cvars
                {
                    this.clip_load = this.(weapon_load[this.m_switchweapon.m_id]);
                    this.clip_size = newwep.reloading_ammo;
                }
                else
                {
                    this.clip_load = this.clip_size = 0;
                }

                weapon_thinkf(actor, weaponentity, WFRAME_DONTCHANGE, newwep.switchdelay_raise, w_ready);
                break;
            }
            case WS_DROP:
            {
                // in dropping phase we can switch at any time
                this.m_switchingweapon = this.m_switchweapon;
                break;
            }
            case WS_READY:
            {
                // start switching!
                this.m_switchingweapon = this.m_switchweapon;
                entity oldwep = this.m_weapon;

                // set up weapon switch think in the future, and start drop anim
                if (INDEPENDENT_ATTACK_FINISHED || ATTACK_FINISHED(actor, weaponentity) <= time + this.weapon_frametime * 0.5)
                {
                    sound(actor, CH_WEAPON_SINGLE, SND_WEAPON_SWITCH, VOL_BASE, ATTN_NORM);
                    this.state = WS_DROP;
                    weapon_thinkf(actor, weaponentity, WFRAME_DONTCHANGE, oldwep.switchdelay_drop, w_clear);
                }
                break;
            }
        }
    }

    // LordHavoc: network timing test code
    // if (actor.button0)
    //  print(ftos(frametime), " ", ftos(time), " >= ", ftos(ATTACK_FINISHED(actor, weaponentity)), " >= ", ftos(this.weapon_nextthink), "\n");

    Weapon w = this.m_weapon;

    // call the think code which may fire the weapon
    // and do so multiple times to resolve framerate dependency issues if the
    // server framerate is very low and the weapon fire rate very high
    for (int c = 0; c < W_TICSPERFRAME; ++c)
    {
        if (w != WEP_Null && !(STAT(WEAPONS, actor) & WepSet_FromWeapon(w)))
        {
            if (this.m_weapon == this.m_switchweapon)
                W_SwitchWeapon_Force(actor, w_getbestweapon(actor, weaponentity), weaponentity);
            w = WEP_Null;
        }

        v_forward = fo;
        v_right = ri;
        v_up = up;

        bool block_weapon = false;
        {
            bool key_pressed = PHYS_INPUT_BUTTON_HOOK(actor) && !actor.vehicle;
            if (weaponUseForbidden(actor))
                key_pressed = false;

            Weapon off = actor.offhand;
            if (off && (!(STAT(WEAPONS, actor) & WEPSET(HOOK)) || off != OFFHAND_HOOK))
            {
                if (off.offhand_think) off.offhand_think(off, actor, key_pressed);
            }
            else
            {
                if (key_pressed && this.m_switchweapon != WEP_HOOK && !actor.hook_switchweapon)
                    W_SwitchWeapon(actor, WEP_HOOK, weaponentity);
                actor.hook_switchweapon = key_pressed;
                Weapon h = WEP_HOOK;
                block_weapon = (this.m_weapon == h && (button_atck || key_pressed));
                h.wr_think(h, actor, weaponentity, block_weapon ? 1 : 0);
            }
        }

        v_forward = fo;
        v_right = ri;
        v_up = up;

        if (!block_weapon)
        {
            Weapon e = this.m_weapon;
            TC(Weapon, e);
            if (w != WEP_Null)
            {
                e.wr_think(e, actor, weaponentity, button_atck | (button_atck2 << 1));
            }
            else if (e)
            {
                e.wr_gonethink(e, actor, weaponentity);
            }
        }

        if (time + this.weapon_frametime * 0.5 >= this.weapon_nextthink)
        {
            if (this.weapon_think)
            {
                v_forward = fo;
                v_right = ri;
                v_up = up;
                Weapon wpn = this.m_weapon;
                this.weapon_think(wpn, actor, weaponentity, button_atck | (button_atck2 << 1));
            }
            else
            {
                bprint("\{1}^1ERROR: undefined weapon think function for ", actor.netname, "\n");
            }
        }
    }
}

void W_AttachToShotorg(entity actor, .entity weaponentity, entity flash, vector offset)
{
    flash.owner = actor;
    flash.angles_z = random() * 360;

    entity w_ent = actor.(weaponentity);
    entity exterior = actor.exteriorweaponentity;

    if (gettagindex(w_ent, "shot")) setattachment(flash, w_ent, "shot");
    else setattachment(flash, w_ent, "tag_shot");
    setorigin(flash, offset);

    entity xflash = spawn();
    copyentity(flash, xflash);

    flash.viewmodelforclient = actor;

    if (w_ent.oldorigin.x > 0)
    {
        setattachment(xflash, exterior, "");
        setorigin(xflash, w_ent.oldorigin + offset);
    }
    else
    {
        if (gettagindex(exterior, "shot")) setattachment(xflash, exterior, "shot");
        else setattachment(xflash, exterior, "tag_shot");
        setorigin(xflash, offset);
    }
}

void W_DecreaseAmmo(Weapon wep, entity actor, float ammo_use, .entity weaponentity)
{
    if (MUTATOR_CALLHOOK(W_DecreaseAmmo, actor, actor.(weaponentity), ammo_use)) return;
    if ((actor.items & IT_UNLIMITED_AMMO) && !wep.reloading_ammo) return;

    ammo_use = M_ARGV(2, float);

    entity w_ent = actor.(weaponentity);

    // if this weapon is reloadable, decrease its load. Else decrease the player's ammo
    if (wep.reloading_ammo)
    {
        w_ent.clip_load -= ammo_use;
        w_ent.(weapon_load[w_ent.m_weapon.m_id]) = w_ent.clip_load;
    }
    else if (wep.ammo_type != RES_NONE)
    {
        float ammo = GetResource(actor, wep.ammo_type);
        if (ammo < ammo_use)
        {
            backtrace(sprintf(
                "W_DecreaseAmmo(%.2f): '%s' subtracted too much %s from '%s', resulting with '%.2f' left... "
                "Please notify the developers immediately with a copy of this backtrace!\n",
                ammo_use, wep.netname, GetAmmoPicture(wep.ammo_type), actor.netname, ammo));
        }
        SetResource(actor, wep.ammo_type, ammo - ammo_use);
    }
}

// weapon reloading code

.float reload_ammo_amount, reload_ammo_min, reload_time;
.float reload_complain;
.string reload_sound;

void W_ReloadedAndReady(Weapon thiswep, entity actor, .entity weaponentity, int fire)
{
    // finish the reloading process, and do the ammo transfer

    entity w_ent = actor.(weaponentity);
    Weapon wpn = w_ent.m_weapon;

    w_ent.clip_load = w_ent.old_clip_load;  // restore the ammo counter, in case we still had ammo in the weapon before reloading

    // if the gun uses no ammo, max out weapon load, else decrease ammo as we increase weapon load
    if (!w_ent.reload_ammo_min || (actor.items & IT_UNLIMITED_AMMO) || wpn.ammo_type == RES_NONE)
    {
        w_ent.clip_load = w_ent.reload_ammo_amount;
    }
    else
    {
        // make sure we don't add more ammo than we have
        float ammo = GetResource(actor, wpn.ammo_type);
        float load = min(w_ent.reload_ammo_amount - w_ent.clip_load, ammo);
        w_ent.clip_load += load;
        SetResource(actor, wpn.ammo_type, ammo - load);
    }
    w_ent.(weapon_load[w_ent.m_weapon.m_id]) = w_ent.clip_load;

    // do not set ATTACK_FINISHED in reload code any more. This causes annoying delays if eg: You start reloading a weapon,
    // then quickly switch to another weapon and back. Reloading is canceled, but the reload delay is still there,
    // so your weapon is disabled for a few seconds without reason

    // ATTACK_FINISHED(actor, weaponentity) -= w_ent.reload_time - 1;

    w_ready(wpn, actor, weaponentity, PHYS_INPUT_BUTTON_ATCK(actor) | (PHYS_INPUT_BUTTON_ATCK2(actor) << 1));
}

void W_Reload(entity actor, .entity weaponentity, float sent_ammo_min, Sound sent_sound)
{
    TC(Sound, sent_sound);
    // set global values to work with
    entity this = actor.(weaponentity);
    Weapon e = this.m_weapon;

    if (MUTATOR_CALLHOOK(W_Reload, actor)) return;

    this.reload_ammo_min = sent_ammo_min;
    this.reload_ammo_amount = e.reloading_ammo;
    this.reload_time = e.reloading_time;
    strcpy(actor.reload_sound, Sound_fixpath(sent_sound));

    // don't reload weapons that don't have the RELOADABLE flag
    if (!(e.spawnflags & WEP_FLAG_RELOADABLE))
    {
        LOG_TRACE(
            "Warning: Attempted to reload a weapon that does not have the WEP_FLAG_RELOADABLE flag. Fix your code!\n");
        return;
    }

    // return if reloading is disabled for this weapon
    if (!this.reload_ammo_amount) return;

    // our weapon is fully loaded, no need to reload
    if (this.clip_load >= this.reload_ammo_amount) return;

    // no ammo, so nothing to load
    if (e.ammo_type != RES_NONE)
    {
        if (!GetResource(actor, e.ammo_type) && this.reload_ammo_min)
        {
            if (!(actor.items & IT_UNLIMITED_AMMO))
            {
                if (autocvar_g_weaponswitch_debug == 2 && weaponslot(weaponentity) > 0)
                    return; // in this case the primary weapon will do the switching when it runs out of ammo (TODO: do this same check but for other slots)
                if (IS_REAL_CLIENT(actor) && actor.reload_complain < time)
                {
                    play2(actor, SND(UNAVAILABLE));
                    sprint(actor, strcat("You don't have enough ammo to reload the ^2", this.m_weapon.m_name, "\n"));
                    actor.reload_complain = time + 1;
                }
                // switch away if the amount of ammo is not enough to keep using this weapon
                if (!(e.wr_checkammo1(e, actor, weaponentity) + e.wr_checkammo2(e, actor, weaponentity)))
                {
                    this.clip_load = -1;  // reload later
                    W_SwitchToOtherWeapon(actor, weaponentity);
                }
                return;
            }
        }
    }
    if (this)
    {
        if (this.wframe == WFRAME_RELOAD) return;

        // allow switching away while reloading, but this will cause a new reload!
        this.state = WS_READY;
    }

    // now begin the reloading process

    _sound(actor, CH_WEAPON_SINGLE, actor.reload_sound, VOL_BASE, ATTEN_NORM);

    // do not set ATTACK_FINISHED in reload code any more. This causes annoying delays if eg: You start reloading a weapon,
    // then quickly switch to another weapon and back. Reloading is canceled, but the reload delay is still there,
    // so your weapon is disabled for a few seconds without reason

    // ATTACK_FINISHED(actor, weaponentity) = max(time, ATTACK_FINISHED(actor, weaponentity)) + this.reload_time + 1;

    weapon_thinkf(actor, weaponentity, WFRAME_RELOAD, this.reload_time, W_ReloadedAndReady);

    if (this.clip_load < 0) this.clip_load = 0;
    this.old_clip_load = this.clip_load;
    this.clip_load = this.(weapon_load[this.m_weapon.m_id]) = -1;
}

void W_DropEvent(.void(Weapon, entity actor, .entity) event, entity player, float weapon_type, entity weapon_item, .entity weaponentity)
{
    Weapon w = REGISTRY_GET(Weapons, weapon_type);
    weapon_dropevent_item = weapon_item;
    w.event(w, player, weaponentity);
}