Purge self from the damage/death mutator hooks

[xonotic/xonotic-data.pk3dir.git] / qcsrc / common / monsters / sv_monsters.qc

#if defined(CSQC)
#elif defined(MENUQC)
#elif defined(SVQC)
    #include <lib/warpzone/common.qh>
    #include "../constants.qh"
    #include "../teams.qh"
    #include "../util.qh"
    #include "all.qh"
    #include "sv_monsters.qh"
        #include "../physics/movelib.qh"
    #include "../weapons/all.qh"
    #include <server/autocvars.qh>
    #include <server/defs.qh>
    #include "../deathtypes/all.qh"
    #include <server/mutators/all.qh>
        #include <server/steerlib.qh>
        #include "../turrets/sv_turrets.qh"
        #include "../turrets/util.qh"
    #include "../vehicles/all.qh"
    #include <server/campaign.qh>
    #include <server/command/common.qh>
    #include <server/command/cmd.qh>
        #include "../triggers/triggers.qh"
    #include <lib/csqcmodel/sv_model.qh>
    #include <server/round_handler.qh>
#endif

void monsters_setstatus(entity this)
{
        this.stat_monsters_total = monsters_total;
        this.stat_monsters_killed = monsters_killed;
}

void monster_dropitem(entity this, entity attacker)
{
        if(!this.candrop || !this.monster_loot)
                return;

        vector org = this.origin + ((this.mins + this.maxs) * 0.5);
        entity e = new(droppedweapon); // use weapon handling to remove it on touch
        e.spawnfunc_checked = true;

        e.monster_loot = this.monster_loot;

        MUTATOR_CALLHOOK(MonsterDropItem, this, e, attacker);
        e = M_ARGV(1, entity);

        if(e && e.monster_loot)
        {
                e.noalign = true;
                WITHSELF(e, e.monster_loot(e));
                e.gravity = 1;
                e.movetype = MOVETYPE_TOSS;
                e.reset = SUB_Remove;
                setorigin(e, org);
                e.velocity = randomvec() * 175 + '0 0 325';
                e.item_spawnshieldtime = time + 0.7;
                SUB_SetFade(e, time + autocvar_g_monsters_drop_time, 1);
        }
}

void monster_makevectors(entity this, entity targ)
{
        if(IS_MONSTER(this))
        {
                vector v = targ.origin + (targ.mins + targ.maxs) * 0.5;
                this.v_angle = vectoangles(v - (this.origin + this.view_ofs));
                this.v_angle_x = -this.v_angle_x;
        }

        makevectors(this.v_angle);
}

// ===============
// Target handling
// ===============

bool Monster_ValidTarget(entity this, entity targ)
{
        // ensure we're not checking nonexistent monster/target
        if(!this || !targ) { return false; }

        if((targ == this)
        || (autocvar_g_monsters_lineofsight && !checkpvs(this.origin + this.view_ofs, targ)) // enemy cannot be seen
        || (IS_VEHICLE(targ) && !((get_monsterinfo(this.monsterid)).spawnflags & MON_FLAG_RANGED)) // melee vs vehicle is useless
        || (time < game_starttime) // monsters do nothing before match has started
        || (targ.takedamage == DAMAGE_NO)
        || (targ.items & IT_INVISIBILITY)
        || (IS_SPEC(targ) || IS_OBSERVER(targ)) // don't attack spectators
        || (!IS_VEHICLE(targ) && (IS_DEAD(targ) || IS_DEAD(this) || targ.health <= 0 || this.health <= 0))
        || (this.monster_follow == targ || targ.monster_follow == this)
        || (!IS_VEHICLE(targ) && (targ.flags & FL_NOTARGET))
        || (!autocvar_g_monsters_typefrag && PHYS_INPUT_BUTTON_CHAT(targ))
        || (SAME_TEAM(targ, this))
        || (STAT(FROZEN, targ))
        || (targ.alpha != 0 && targ.alpha < 0.5)
        )
        {
                // if any of the above checks fail, target is not valid
                return false;
        }

        traceline(this.origin + this.view_ofs, targ.origin, 0, this);

        if((trace_fraction < 1) && (trace_ent != targ))
                return false;

        if(autocvar_g_monsters_target_infront || (this.spawnflags & MONSTERFLAG_INFRONT))
        if(this.enemy != targ)
        {
                float dot;

                makevectors (this.angles);
                dot = normalize (targ.origin - this.origin) * v_forward;

                if(dot <= autocvar_g_monsters_target_infront_range) { return false; }
        }

        return true; // this target is valid!
}

entity Monster_FindTarget(entity mon)
{
        if(MUTATOR_CALLHOOK(MonsterFindTarget)) { return mon.enemy; } // Handled by a mutator

        entity head, closest_target = world;
        head = findradius(mon.origin, mon.target_range);

        while(head) // find the closest acceptable target to pass to
        {
                if(head.monster_attack)
                if(Monster_ValidTarget(mon, head))
                {
                        // if it's a player, use the view origin as reference (stolen from RadiusDamage functions in g_damage.qc)
                        vector head_center = CENTER_OR_VIEWOFS(head);
                        vector ent_center = CENTER_OR_VIEWOFS(mon);

                        if(closest_target)
                        {
                                vector closest_target_center = CENTER_OR_VIEWOFS(closest_target);
                                if(vlen2(ent_center - head_center) < vlen2(ent_center - closest_target_center))
                                        { closest_target = head; }
                        }
                        else { closest_target = head; }
                }

                head = head.chain;
        }

        return closest_target;
}

void monster_setupcolors(entity mon)
{
        if(IS_PLAYER(mon.realowner))
                mon.colormap = mon.realowner.colormap;
        else if(teamplay && mon.team)
                mon.colormap = 1024 + (mon.team - 1) * 17;
        else
        {
                if(mon.monster_skill <= MONSTER_SKILL_EASY)
                        mon.colormap = 1029;
                else if(mon.monster_skill <= MONSTER_SKILL_MEDIUM)
                        mon.colormap = 1027;
                else if(mon.monster_skill <= MONSTER_SKILL_HARD)
                        mon.colormap = 1038;
                else if(mon.monster_skill <= MONSTER_SKILL_INSANE)
                        mon.colormap = 1028;
                else if(mon.monster_skill <= MONSTER_SKILL_NIGHTMARE)
                        mon.colormap = 1032;
                else
                        mon.colormap = 1024;
        }
}

void monster_changeteam(entity ent, float newteam)
{
        if(!teamplay) { return; }

        ent.team = newteam;
        ent.monster_attack = true; // new team, activate attacking
        monster_setupcolors(ent);

        if(ent.sprite)
        {
                WaypointSprite_UpdateTeamRadar(ent.sprite, RADARICON_DANGER, ((newteam) ? Team_ColorRGB(newteam) : '1 0 0'));

                ent.sprite.team = newteam;
                ent.sprite.SendFlags |= 1;
        }
}

.void(entity) monster_delayedfunc;
void Monster_Delay_Action(entity this)
{
        if(Monster_ValidTarget(this.owner, this.owner.enemy)) { this.monster_delayedfunc(this.owner); }

        if(this.cnt > 1)
        {
                this.cnt -= 1;
                setthink(this, Monster_Delay_Action);
                this.nextthink = time + this.count;
        }
        else
        {
                setthink(this, SUB_Remove);
                this.nextthink = time;
        }
}

void Monster_Delay(entity this, int repeat_count, float defer_amnt, void(entity) func)
{
        // deferred attacking, checks if monster is still alive and target is still valid before attacking
        entity e = spawn();

        setthink(e, Monster_Delay_Action);
        e.nextthink = time + defer_amnt;
        e.count = defer_amnt;
        e.owner = this;
        e.monster_delayedfunc = func;
        e.cnt = repeat_count;
}


// ==============
// Monster sounds
// ==============

string get_monster_model_datafilename(string m, float sk, string fil)
{
        if(m)
                m = strcat(m, "_");
        else
                m = "models/monsters/*_";
        if(sk >= 0)
                m = strcat(m, ftos(sk));
        else
                m = strcat(m, "*");
        return strcat(m, ".", fil);
}

void Monster_Sound_Precache(string f)
{
        float fh;
        string s;
        fh = fopen(f, FILE_READ);
        if(fh < 0)
                return;
        while((s = fgets(fh)))
        {
                if(tokenize_console(s) != 3)
                {
                        LOG_TRACE("Invalid sound info line: ", s, "\n");
                        continue;
                }
                PrecacheGlobalSound(strcat(argv(1), " ", argv(2)));
        }
        fclose(fh);
}

void Monster_Sounds_Precache(entity this)
{
        string m = (Monsters_from(this.monsterid)).m_model.model_str();
        float globhandle, n, i;
        string f;

        globhandle = search_begin(strcat(m, "_*.sounds"), true, false);
        if (globhandle < 0)
                return;
        n = search_getsize(globhandle);
        for (i = 0; i < n; ++i)
        {
                //print(search_getfilename(globhandle, i), "\n");
                f = search_getfilename(globhandle, i);
                Monster_Sound_Precache(f);
        }
        search_end(globhandle);
}

void Monster_Sounds_Clear(entity this)
{
#define _MSOUND(m) if(this.monstersound_##m) { strunzone(this.monstersound_##m); this.monstersound_##m = string_null; }
        ALLMONSTERSOUNDS
#undef _MSOUND
}

.string Monster_Sound_SampleField(string type)
{
        GetMonsterSoundSampleField_notFound = 0;
        switch(type)
        {
#define _MSOUND(m) case #m: return monstersound_##m;
                ALLMONSTERSOUNDS
#undef _MSOUND
        }
        GetMonsterSoundSampleField_notFound = 1;
        return string_null;
}

bool Monster_Sounds_Load(entity this, string f, int first)
{
        float fh;
        string s;
        var .string field;
        fh = fopen(f, FILE_READ);
        if(fh < 0)
        {
                LOG_TRACE("Monster sound file not found: ", f, "\n");
                return false;
        }
        while((s = fgets(fh)))
        {
                if(tokenize_console(s) != 3)
                        continue;
                field = Monster_Sound_SampleField(argv(0));
                if(GetMonsterSoundSampleField_notFound)
                        continue;
                if (this.(field))
                        strunzone(this.(field));
                this.(field) = strzone(strcat(argv(1), " ", argv(2)));
        }
        fclose(fh);
        return true;
}

.int skin_for_monstersound;
void Monster_Sounds_Update(entity this)
{
        if(this.skin == this.skin_for_monstersound) { return; }

        this.skin_for_monstersound = this.skin;
        Monster_Sounds_Clear(this);
        if(!Monster_Sounds_Load(this, get_monster_model_datafilename(this.model, this.skin, "sounds"), 0))
                Monster_Sounds_Load(this, get_monster_model_datafilename(this.model, 0, "sounds"), 0);
}

void Monster_Sound(entity this, .string samplefield, float sound_delay, float delaytoo, float chan)
{
        if(!autocvar_g_monsters_sounds) { return; }

        if(delaytoo)
        if(time < this.msound_delay)
                return; // too early
        GlobalSound_string(this, this.(samplefield), chan, VOICETYPE_PLAYERSOUND);

        this.msound_delay = time + sound_delay;
}


// =======================
// Monster attack handlers
// =======================

bool Monster_Attack_Melee(entity this, entity targ, float damg, vector anim, float er, float animtime, int deathtype, bool dostop)
{
        if(dostop && IS_MONSTER(this)) { this.state = MONSTER_ATTACK_MELEE; }

        setanim(this, anim, false, true, false);

        if(this.animstate_endtime > time && IS_MONSTER(this))
                this.attack_finished_single[0] = this.anim_finished = this.animstate_endtime;
        else
                this.attack_finished_single[0] = this.anim_finished = time + animtime;

        monster_makevectors(this, targ);

        traceline(this.origin + this.view_ofs, this.origin + v_forward * er, 0, this);

        if(trace_ent.takedamage)
                Damage(trace_ent, this, this, damg * MONSTER_SKILLMOD(this), deathtype, trace_ent.origin, normalize(trace_ent.origin - this.origin));

        return true;
}

bool Monster_Attack_Leap_Check(entity this, vector vel)
{
        if(this.state && IS_MONSTER(this))
                return false; // already attacking
        if(!IS_ONGROUND(this))
                return false; // not on the ground
        if(this.health <= 0 || IS_DEAD(this))
                return false; // called when dead?
        if(time < this.attack_finished_single[0])
                return false; // still attacking

        vector old = this.velocity;

        this.velocity = vel;
        tracetoss(this, this);
        this.velocity = old;
        if (trace_ent != this.enemy)
                return false;

        return true;
}

bool Monster_Attack_Leap(entity this, vector anm, void(entity this) touchfunc, vector vel, float animtime)
{
        if(!Monster_Attack_Leap_Check(this, vel))
                return false;

        setanim(this, anm, false, true, false);

        if(this.animstate_endtime > time && (this.flags & FL_MONSTER))
                this.attack_finished_single[0] = this.anim_finished = this.animstate_endtime;
        else
                this.attack_finished_single[0] = this.anim_finished = time + animtime;

        if(this.flags & FL_MONSTER)
                this.state = MONSTER_ATTACK_RANGED;
        settouch(this, touchfunc);
        this.origin_z += 1;
        this.velocity = vel;
        UNSET_ONGROUND(this);

        return true;
}

void Monster_Attack_Check(entity this, entity targ)
{
        if((this == world || targ == world)
        || (!this.monster_attackfunc)
        || (time < this.attack_finished_single[0])
        ) { return; }

        if(vdist(targ.origin - this.origin, <=, this.attack_range))
        {
                bool attack_success = this.monster_attackfunc(MONSTER_ATTACK_MELEE, this, targ);
                if(attack_success == 1)
                        Monster_Sound(this, monstersound_melee, 0, false, CH_VOICE);
                else if(attack_success > 0)
                        return;
        }

        if(vdist(targ.origin - this.origin, >, this.attack_range))
        {
                float attack_success = this.monster_attackfunc(MONSTER_ATTACK_RANGED, this, targ);
                if(attack_success == 1)
                        Monster_Sound(this, monstersound_melee, 0, false, CH_VOICE);
                else if(attack_success > 0)
                        return;
        }
}


// ======================
// Main monster functions
// ======================

void Monster_UpdateModel(entity this)
{
        // assume some defaults
        /*this.anim_idle   = animfixfps(this, '0 1 0.01', '0 0 0');
        this.anim_walk   = animfixfps(this, '1 1 0.01', '0 0 0');
        this.anim_run    = animfixfps(this, '2 1 0.01', '0 0 0');
        this.anim_fire1  = animfixfps(this, '3 1 0.01', '0 0 0');
        this.anim_fire2  = animfixfps(this, '4 1 0.01', '0 0 0');
        this.anim_melee  = animfixfps(this, '5 1 0.01', '0 0 0');
        this.anim_pain1  = animfixfps(this, '6 1 0.01', '0 0 0');
        this.anim_pain2  = animfixfps(this, '7 1 0.01', '0 0 0');
        this.anim_die1   = animfixfps(this, '8 1 0.01', '0 0 0');
        this.anim_die2   = animfixfps(this, '9 1 0.01', '0 0 0');*/

        // then get the real values
        Monster mon = get_monsterinfo(this.monsterid);
        mon.mr_anim(mon, this);
}

void Monster_Touch(entity this)
{
        if(other == world) { return; }

        if(other.monster_attack)
        if(this.enemy != other)
        if(!IS_MONSTER(other))
        if(Monster_ValidTarget(this, other))
                this.enemy = other;
}

void Monster_Miniboss_Check(entity this)
{
        if(MUTATOR_CALLHOOK(MonsterCheckBossFlag, this))
                return;

        float chance = random() * 100;

        // g_monsters_miniboss_chance cvar or spawnflags 64 causes a monster to be a miniboss
        if ((this.spawnflags & MONSTERFLAG_MINIBOSS) || (chance < autocvar_g_monsters_miniboss_chance))
        {
                this.health += autocvar_g_monsters_miniboss_healthboost;
                this.effects |= EF_RED;
                if(!this.weapon)
                        this.weapon = WEP_VORTEX.m_id;
        }
}

bool Monster_Respawn_Check(entity this)
{
        if(this.deadflag == DEAD_DEAD) // don't call when monster isn't dead
        if(MUTATOR_CALLHOOK(MonsterRespawn, this))
                return true; // enabled by a mutator

        if(this.spawnflags & MONSTERFLAG_NORESPAWN)
                return false;

        if(!autocvar_g_monsters_respawn)
                return false;

        return true;
}

void Monster_Respawn(entity this) { Monster_Spawn(this, this.monsterid); }

void Monster_Dead_Fade(entity this)
{
        if(Monster_Respawn_Check(this))
        {
                this.spawnflags |= MONSTERFLAG_RESPAWNED;
                setthink(this, Monster_Respawn);
                this.nextthink = time + this.respawntime;
                this.monster_lifetime = 0;
                this.deadflag = DEAD_RESPAWNING;
                if(this.spawnflags & MONSTER_RESPAWN_DEATHPOINT)
                {
                        this.pos1 = this.origin;
                        this.pos2 = this.angles;
                }
                this.event_damage = func_null;
                this.takedamage = DAMAGE_NO;
                setorigin(this, this.pos1);
                this.angles = this.pos2;
                this.health = this.max_health;
                setmodel(this, MDL_Null);
        }
        else
        {
                // number of monsters spawned with mobspawn command
                totalspawned -= 1;

                SUB_SetFade(this, time + 3, 1);
        }
}

void Monster_Use(entity this, entity actor, entity trigger)
{
        if(Monster_ValidTarget(this, actor)) { this.enemy = actor; }
}

vector Monster_Move_Target(entity this, entity targ)
{
        // enemy is always preferred target
        if(this.enemy)
        {
                vector targ_origin = ((this.enemy.absmin + this.enemy.absmax) * 0.5);
                targ_origin = WarpZone_RefSys_TransformOrigin(this.enemy, this, targ_origin); // origin of target as seen by the monster (us)
                WarpZone_TraceLine(this.origin, targ_origin, MOVE_NOMONSTERS, this);

                if((this.enemy == world)
                        || (IS_DEAD(this.enemy) || this.enemy.health < 1)
                        || (STAT(FROZEN, this.enemy))
                        || (this.enemy.flags & FL_NOTARGET)
                        || (this.enemy.alpha < 0.5 && this.enemy.alpha != 0)
                        || (this.enemy.takedamage == DAMAGE_NO)
                        || (vdist(this.origin - targ_origin, >, this.target_range))
                        || ((trace_fraction < 1) && (trace_ent != this.enemy)))
                {
                        this.enemy = world;
                        this.pass_distance = 0;
                }

                if(this.enemy)
                {
                        /*WarpZone_TrailParticles(world, particleeffectnum(EFFECT_RED_PASS), this.origin, targ_origin);
                        print("Trace origin: ", vtos(targ_origin), "\n");
                        print("Target origin: ", vtos(this.enemy.origin), "\n");
                        print("My origin: ", vtos(this.origin), "\n"); */

                        this.monster_movestate = MONSTER_MOVE_ENEMY;
                        this.last_trace = time + 1.2;
                        if(this.monster_moveto)
                                return this.monster_moveto; // assumes code is properly setting this when monster has an enemy
                        else
                                return targ_origin;
                }

                /*makevectors(this.angles);
                this.monster_movestate = MONSTER_MOVE_ENEMY;
                this.last_trace = time + 1.2;
                return this.enemy.origin; */
        }

        switch(this.monster_moveflags)
        {
                case MONSTER_MOVE_FOLLOW:
                {
                        this.monster_movestate = MONSTER_MOVE_FOLLOW;
                        this.last_trace = time + 0.3;
                        return (this.monster_follow) ? this.monster_follow.origin : this.origin;
                }
                case MONSTER_MOVE_SPAWNLOC:
                {
                        this.monster_movestate = MONSTER_MOVE_SPAWNLOC;
                        this.last_trace = time + 2;
                        return this.pos1;
                }
                case MONSTER_MOVE_NOMOVE:
                {
                        if(this.monster_moveto)
                        {
                                this.last_trace = time + 0.5;
                                return this.monster_moveto;
                        }
                        else
                        {
                                this.monster_movestate = MONSTER_MOVE_NOMOVE;
                                this.last_trace = time + 2;
                        }
                        return this.origin;
                }
                default:
                case MONSTER_MOVE_WANDER:
                {
                        vector pos;
                        this.monster_movestate = MONSTER_MOVE_WANDER;

                        if(this.monster_moveto)
                        {
                                this.last_trace = time + 0.5;
                                pos = this.monster_moveto;
                        }
                        else if(targ)
                        {
                                this.last_trace = time + 0.5;
                                pos = targ.origin;
                        }
                        else
                        {
                                this.last_trace = time + this.wander_delay;

                                this.angles_y = rint(random() * 500);
                                makevectors(this.angles);
                                pos = this.origin + v_forward * this.wander_distance;

                                if(((this.flags & FL_FLY) && (this.spawnflags & MONSTERFLAG_FLY_VERTICAL)) || (this.flags & FL_SWIM))
                                {
                                        pos.z = random() * 200;
                                        if(random() >= 0.5)
                                                pos.z *= -1;
                                }
                        }

                        return pos;
                }
        }
}

void Monster_CalculateVelocity(entity this, vector to, vector from, float turnrate, float movespeed)
{
        float current_distance = vlen((('1 0 0' * to.x) + ('0 1 0' * to.y)) - (('1 0 0' * from.x) + ('0 1 0' * from.y))); // for the sake of this check, exclude Z axis
        float initial_height = 0; //min(50, (targ_distance * tanh(20)));
        float current_height = (initial_height * min(1, (this.pass_distance) ? (current_distance / this.pass_distance) : current_distance));
        //print("current_height = ", ftos(current_height), ", initial_height = ", ftos(initial_height), ".\n");

        vector targpos;
        if(current_height) // make sure we can actually do this arcing path
        {
                targpos = (to + ('0 0 1' * current_height));
                WarpZone_TraceLine(this.origin, targpos, MOVE_NOMONSTERS, this);
                if(trace_fraction < 1)
                {
                        //print("normal arc line failed, trying to find new pos...");
                        WarpZone_TraceLine(to, targpos, MOVE_NOMONSTERS, this);
                        targpos = (trace_endpos + '0 0 -10');
                        WarpZone_TraceLine(this.origin, targpos, MOVE_NOMONSTERS, this);
                        if(trace_fraction < 1) { targpos = to; /* print(" ^1FAILURE^7, reverting to original direction.\n"); */ }
                        /*else { print(" ^3SUCCESS^7, using new arc line.\n"); } */
                }
        }
        else { targpos = to; }

        //this.angles = normalize(('0 1 0' * to_y) - ('0 1 0' * from_y));

        vector desired_direction = normalize(targpos - from);
        if(turnrate) { this.velocity = (normalize(normalize(this.velocity) + (desired_direction * 50)) * movespeed); }
        else { this.velocity = (desired_direction * movespeed); }

        //this.steerto = steerlib_attract2(targpos, 0.5, 500, 0.95);
        //this.angles = vectoangles(this.velocity);
}

void Monster_Move(entity this, float runspeed, float walkspeed, float stpspeed)
{
        if(this.target2) { this.goalentity = find(world, targetname, this.target2); }

        entity targ;

        if(STAT(FROZEN, this) == 2)
        {
                this.revive_progress = bound(0, this.revive_progress + this.ticrate * this.revive_speed, 1);
                this.health = max(1, this.revive_progress * this.max_health);
                this.iceblock.alpha = bound(0.2, 1 - this.revive_progress, 1);

                if(!(this.spawnflags & MONSTERFLAG_INVINCIBLE) && this.sprite)
                        WaypointSprite_UpdateHealth(this.sprite, this.health);

                movelib_brake_simple(this, stpspeed);
                setanim(this, this.anim_idle, true, false, false);

                this.enemy = world;
                this.nextthink = time + this.ticrate;

                if(this.revive_progress >= 1)
                        Unfreeze(this);

                return;
        }
        else if(STAT(FROZEN, this) == 3)
        {
                this.revive_progress = bound(0, this.revive_progress - this.ticrate * this.revive_speed, 1);
                this.health = max(0, autocvar_g_nades_ice_health + (this.max_health-autocvar_g_nades_ice_health) * this.revive_progress );

                if(!(this.spawnflags & MONSTERFLAG_INVINCIBLE) && this.sprite)
                        WaypointSprite_UpdateHealth(this.sprite, this.health);

                movelib_brake_simple(this, stpspeed);
                setanim(this, this.anim_idle, true, false, false);

                this.enemy = world;
                this.nextthink = time + this.ticrate;

                if(this.health < 1)
                {
                        Unfreeze(this);
                        this.health = 0;
                        if(this.event_damage)
                                this.event_damage(this, this, this.frozen_by, 1, DEATH_NADE_ICE_FREEZE.m_id, this.origin, '0 0 0');
                }

                else if ( this.revive_progress <= 0 )
                        Unfreeze(this);

                return;
        }

        if(this.flags & FL_SWIM)
        {
                if(this.waterlevel < WATERLEVEL_WETFEET)
                {
                        if(time >= this.last_trace)
                        {
                                this.last_trace = time + 0.4;

                                Damage (this, world, world, 2, DEATH_DROWN.m_id, this.origin, '0 0 0');
                                this.angles = '90 90 0';
                                if(random() < 0.5)
                                {
                                        this.velocity_y += random() * 50;
                                        this.velocity_x -= random() * 50;
                                }
                                else
                                {
                                        this.velocity_y -= random() * 50;
                                        this.velocity_x += random() * 50;
                                }
                                this.velocity_z += random() * 150;
                        }


                        this.movetype = MOVETYPE_BOUNCE;
                        //this.velocity_z = -200;

                        return;
                }
                else if(this.movetype == MOVETYPE_BOUNCE)
                {
                        this.angles_x = 0;
                        this.movetype = MOVETYPE_WALK;
                }
        }

        targ = this.goalentity;

        if (MUTATOR_CALLHOOK(MonsterMove, this, runspeed, walkspeed, targ)
                || gameover
                || this.draggedby != world
                || (round_handler_IsActive() && !round_handler_IsRoundStarted())
                || time < game_starttime
                || (autocvar_g_campaign && !campaign_bots_may_start)
                || time < this.spawn_time)
        {
                runspeed = walkspeed = 0;
                if(time >= this.spawn_time)
                        setanim(this, this.anim_idle, true, false, false);
                movelib_brake_simple(this, stpspeed);
                return;
        }

        targ = monster_target;
        runspeed = bound(0, monster_speed_run * MONSTER_SKILLMOD(this), runspeed * 2.5); // limit maxspeed to prevent craziness
        walkspeed = bound(0, monster_speed_walk * MONSTER_SKILLMOD(this), walkspeed * 2.5); // limit maxspeed to prevent craziness

        if(teamplay)
        if(autocvar_g_monsters_teams)
        if(DIFF_TEAM(this.monster_follow, this))
                this.monster_follow = world;

        if(time >= this.last_enemycheck)
        {
                if(!this.enemy)
                {
                        this.enemy = Monster_FindTarget(this);
                        if(this.enemy)
                        {
                                WarpZone_RefSys_Copy(this.enemy, this);
                                WarpZone_RefSys_AddInverse(this.enemy, this); // wz1^-1 ... wzn^-1 receiver
                                this.moveto = WarpZone_RefSys_TransformOrigin(this.enemy, this, (0.5 * (this.enemy.absmin + this.enemy.absmax)));
                                this.monster_moveto = '0 0 0';
                                this.monster_face = '0 0 0';

                                this.pass_distance = vlen((('1 0 0' * this.enemy.origin_x) + ('0 1 0' * this.enemy.origin_y)) - (('1 0 0' *  this.origin_x) + ('0 1 0' *  this.origin_y)));
                                Monster_Sound(this, monstersound_sight, 0, false, CH_VOICE);
                        }
                }

                this.last_enemycheck = time + 1; // check for enemies every second
        }

        if(this.state == MONSTER_ATTACK_RANGED && IS_ONGROUND(this))
        {
                this.state = 0;
                settouch(this, Monster_Touch);
        }

        if(this.state && time >= this.attack_finished_single[0])
                this.state = 0; // attack is over

        if(this.state != MONSTER_ATTACK_MELEE) // don't move if set
        if(time >= this.last_trace || this.enemy) // update enemy or rider instantly
                this.moveto = Monster_Move_Target(this, targ);

        if(!this.enemy)
                Monster_Sound(this, monstersound_idle, 7, true, CH_VOICE);

        if(this.state == MONSTER_ATTACK_MELEE)
                this.moveto = this.origin;

        if(this.enemy && this.enemy.vehicle)
                runspeed = 0;

        if(!(this.spawnflags & MONSTERFLAG_FLY_VERTICAL) && !(this.flags & FL_SWIM))
                this.moveto_z = this.origin_z;

        if(vdist(this.origin - this.moveto, >, 100))
        {
                float do_run = (this.enemy || this.monster_moveto);
                if(IS_ONGROUND(this) || ((this.flags & FL_FLY) || (this.flags & FL_SWIM)))
                        Monster_CalculateVelocity(this, this.moveto, this.origin, true, ((do_run) ? runspeed : walkspeed));

                if(time > this.pain_finished) // TODO: use anim_finished instead!
                if(!this.state)
                if(time > this.anim_finished)
                if(vdist(this.velocity, >, 10))
                        setanim(this, ((do_run) ? this.anim_run : this.anim_walk), true, false, false);
                else
                        setanim(this, this.anim_idle, true, false, false);
        }
        else
        {
                entity e = find(world, targetname, this.target2);
                if(e.target2)
                        this.target2 = e.target2;
                else if(e.target)
                        this.target2 = e.target;

                movelib_brake_simple(this, stpspeed);
                if(time > this.anim_finished)
                if(time > this.pain_finished)
                if(!this.state)
                if(vdist(this.velocity, <=, 30))
                        setanim(this, this.anim_idle, true, false, false);
        }

        this.steerto = steerlib_attract2(this, ((this.monster_face) ? this.monster_face : this.moveto), 0.5, 500, 0.95);

        vector real_angle = vectoangles(this.steerto) - this.angles;
        float turny = 25;
        if(this.state == MONSTER_ATTACK_MELEE)
                turny = 0;
        if(turny)
        {
                turny = bound(turny * -1, shortangle_f(real_angle.y, this.angles.y), turny);
                this.angles_y += turny;
        }

        Monster_Attack_Check(this, this.enemy);
}

void Monster_Remove(entity this)
{
        if(IS_CLIENT(this))
                return; // don't remove it?

        .entity weaponentity = weaponentities[0];
        if(!this) { return; }

        if(!MUTATOR_CALLHOOK(MonsterRemove, this))
                Send_Effect(EFFECT_ITEM_PICKUP, this.origin, '0 0 0', 1);

        if(this.(weaponentity)) { remove(this.(weaponentity)); }
        if(this.iceblock) { remove(this.iceblock); }
        WaypointSprite_Kill(this.sprite);
        remove(this);
}

void Monster_Dead_Think(entity this)
{
        this.nextthink = time + this.ticrate;

        if(this.monster_lifetime != 0)
        if(time >= this.monster_lifetime)
        {
                Monster_Dead_Fade(this);
                return;
        }
}

void Monster_Appear(entity this, entity actor, entity trigger)
{
        this.enemy = actor;
        this.spawnflags &= ~MONSTERFLAG_APPEAR; // otherwise, we get an endless loop
        Monster_Spawn(this, this.monsterid);
}

bool Monster_Appear_Check(entity this, int monster_id)
{
        if(!(this.spawnflags & MONSTERFLAG_APPEAR))
                return false;

        setthink(this, func_null);
        this.monsterid = monster_id; // set so this monster is properly registered (otherwise, normal initialization is used)
        this.nextthink = 0;
        this.use = Monster_Appear;
        this.flags = FL_MONSTER; // set so this monster can get butchered

        return true;
}

void Monster_Reset(entity this)
{
        setorigin(this, this.pos1);
        this.angles = this.pos2;

        Unfreeze(this); // remove any icy remains

        this.health = this.max_health;
        this.velocity = '0 0 0';
        this.enemy = world;
        this.goalentity = world;
        this.attack_finished_single[0] = 0;
        this.moveto = this.origin;
}

void Monster_Dead_Damage(entity this, entity inflictor, entity attacker, float damage, int deathtype, vector hitloc, vector force)
{
        this.health -= damage;

        Violence_GibSplash_At(hitloc, force, 2, bound(0, damage, 200) / 16, this, attacker);

        if(this.health <= -50) // 100 health until gone?
        {
                Violence_GibSplash_At(hitloc, force, 2, bound(0, damage, 200) / 16, this, attacker);

                // number of monsters spawned with mobspawn command
                totalspawned -= 1;

                setthink(this, SUB_Remove);
                this.nextthink = time + 0.1;
                this.event_damage = func_null;
        }
}

void Monster_Dead(entity this, entity attacker, float gibbed)
{
        setthink(this, Monster_Dead_Think);
        this.nextthink = time;
        this.monster_lifetime = time + 5;

        if(STAT(FROZEN, this))
        {
                Unfreeze(this); // remove any icy remains
                this.health = 0; // reset by Unfreeze
        }

        monster_dropitem(this, attacker);

        Monster_Sound(this, monstersound_death, 0, false, CH_VOICE);

        if(!(this.spawnflags & MONSTERFLAG_SPAWNED) && !(this.spawnflags & MONSTERFLAG_RESPAWNED))
                monsters_killed += 1;

        if(IS_PLAYER(attacker))
        if(autocvar_g_monsters_score_spawned || !((this.spawnflags & MONSTERFLAG_SPAWNED) || (this.spawnflags & MONSTERFLAG_RESPAWNED)))
                PlayerScore_Add(attacker, SP_SCORE, +autocvar_g_monsters_score_kill);

        if(gibbed)
        {
                // number of monsters spawned with mobspawn command
                totalspawned -= 1;
        }

        this.event_damage       = ((gibbed) ? func_null : Monster_Dead_Damage);
        this.solid                      = SOLID_CORPSE;
        this.takedamage         = DAMAGE_AIM;
        this.deadflag           = DEAD_DEAD;
        this.enemy                      = world;
        this.movetype           = MOVETYPE_TOSS;
        this.moveto                     = this.origin;
        settouch(this, Monster_Touch); // reset incase monster was pouncing
        this.reset                      = func_null;
        this.state                      = 0;
        this.attack_finished_single[0] = 0;
        this.effects = 0;

        if(!((this.flags & FL_FLY) || (this.flags & FL_SWIM)))
                this.velocity = '0 0 0';

        CSQCModel_UnlinkEntity(this);

        Monster mon = get_monsterinfo(this.monsterid);
        mon.mr_death(mon, this);

        if(this.candrop && this.weapon)
                W_ThrowNewWeapon(this, this.weapon, 0, this.origin, randomvec() * 150 + '0 0 325');
}

void Monster_Damage(entity this, entity inflictor, entity attacker, float damage, int deathtype, vector hitloc, vector force)
{
        if((this.spawnflags & MONSTERFLAG_INVINCIBLE) && deathtype != DEATH_KILL.m_id && !ITEM_DAMAGE_NEEDKILL(deathtype))
                return;

        if(STAT(FROZEN, this) && deathtype != DEATH_KILL.m_id && deathtype != DEATH_NADE_ICE_FREEZE.m_id)
                return;

        //if(time < this.pain_finished && deathtype != DEATH_KILL.m_id)
                //return;

        if(time < this.spawnshieldtime && deathtype != DEATH_KILL.m_id)
                return;

        if(deathtype == DEATH_FALL.m_id && this.draggedby != world)
                return;

        vector v;
        float take, save;

        v = healtharmor_applydamage(100, this.armorvalue / 100, deathtype, damage);
        take = v_x;
        save = v_y;

        Monster mon = get_monsterinfo(this.monsterid);
        take = mon.mr_pain(mon, this, take, attacker, deathtype);

        if(take)
        {
                this.health -= take;
                Monster_Sound(this, monstersound_pain, 1.2, true, CH_PAIN);
        }

        if(this.sprite)
                WaypointSprite_UpdateHealth(this.sprite, this.health);

        this.dmg_time = time;

        if(sound_allowed(MSG_BROADCAST, attacker) && deathtype != DEATH_DROWN.m_id)
                spamsound (this, CH_PAIN, SND(BODYIMPACT1), VOL_BASE, ATTEN_NORM);  // FIXME: PLACEHOLDER

        this.velocity += force * this.damageforcescale;

        if(deathtype != DEATH_DROWN.m_id && take)
        {
                Violence_GibSplash_At(hitloc, force, 2, bound(0, take, 200) / 16, this, attacker);
                if (take > 50)
                        Violence_GibSplash_At(hitloc, force * -0.1, 3, 1, this, attacker);
                if (take > 100)
                        Violence_GibSplash_At(hitloc, force * -0.2, 3, 1, this, attacker);
        }

        if(this.health <= 0)
        {
                if(deathtype == DEATH_KILL.m_id)
                        this.candrop = false; // killed by mobkill command

                // TODO: fix this?
                SUB_UseTargets(this, attacker, this.enemy);
                this.target2 = this.oldtarget2; // reset to original target on death, incase we respawn

                Monster_Dead(this, attacker, (this.health <= -100 || deathtype == DEATH_KILL.m_id));

                WaypointSprite_Kill(this.sprite);

                MUTATOR_CALLHOOK(MonsterDies, this, attacker, deathtype);

                if(this.health <= -100 || deathtype == DEATH_KILL.m_id) // check if we're already gibbed
                {
                        Violence_GibSplash(this, 1, 0.5, attacker);

                        setthink(this, SUB_Remove);
                        this.nextthink = time + 0.1;
                }
        }
}

// don't check for enemies, just keep walking in a straight line
void Monster_Move_2D(entity this, float mspeed, bool allow_jumpoff)
{
        if(gameover || (round_handler_IsActive() && !round_handler_IsRoundStarted()) || this.draggedby != world || time < game_starttime || (autocvar_g_campaign && !campaign_bots_may_start) || time < this.spawn_time)
        {
                mspeed = 0;
                if(time >= this.spawn_time)
                        setanim(this, this.anim_idle, true, false, false);
                movelib_brake_simple(this, 0.6);
                return;
        }

        float reverse = false;
        vector a, b;

        makevectors(this.angles);
        a = this.origin + '0 0 16';
        b = this.origin + '0 0 16' + v_forward * 32;

        traceline(a, b, MOVE_NORMAL, this);

        if(trace_fraction != 1.0)
        {
                reverse = true;

                if(trace_ent)
                if(IS_PLAYER(trace_ent) && !(trace_ent.items & IT_STRENGTH))
                        reverse = false;
        }

        // TODO: fix this... tracing is broken if the floor is thin
        /*
        if(!allow_jumpoff)
        {
                a = b - '0 0 32';
                traceline(b, a, MOVE_WORLDONLY, this);
                if(trace_fraction == 1.0)
                        reverse = true;
        } */

        if(reverse)
        {
                this.angles_y = anglemods(this.angles_y - 180);
                makevectors(this.angles);
        }

        movelib_move_simple_gravity(this, v_forward, mspeed, 1);

        if(time > this.pain_finished)
        if(time > this.attack_finished_single[0])
        if(vdist(this.velocity, >, 10))
                setanim(this, this.anim_walk, true, false, false);
        else
                setanim(this, this.anim_idle, true, false, false);
}

void Monster_Anim(entity this)
{
        int deadbits = (this.anim_state & (ANIMSTATE_DEAD1 | ANIMSTATE_DEAD2));
        if(IS_DEAD(this))
        {
                if (!deadbits)
                {
                        // Decide on which death animation to use.
                        if(random() < 0.5)
                                deadbits = ANIMSTATE_DEAD1;
                        else
                                deadbits = ANIMSTATE_DEAD2;
                }
        }
        else
        {
                // Clear a previous death animation.
                deadbits = 0;
        }
        int animbits = deadbits;
        if(STAT(FROZEN, this))
                animbits |= ANIMSTATE_FROZEN;
        if(this.crouch)
                animbits |= ANIMSTATE_DUCK; // not that monsters can crouch currently...
        animdecide_setstate(this, animbits, false);
        animdecide_setimplicitstate(this, (IS_ONGROUND(this)));

        /* // weapon entities for monsters?
        if (this.weaponentity)
        {
                updateanim(this.weaponentity);
                if (!this.weaponentity.animstate_override)
                        setanim(this.weaponentity, this.weaponentity.anim_idle, true, false, false);
        }
        */
}

void Monster_Think(entity this)
{
        setthink(this, Monster_Think);
        this.nextthink = this.ticrate;

        if(this.monster_lifetime)
        if(time >= this.monster_lifetime)
        {
                Damage(this, this, this, this.health + this.max_health, DEATH_KILL.m_id, this.origin, this.origin);
                return;
        }

        Monster mon = get_monsterinfo(this.monsterid);
        if(mon.mr_think(mon, this))
                Monster_Move(this, this.speed2, this.speed, this.stopspeed);

        Monster_Anim(this);

        CSQCMODEL_AUTOUPDATE(this);
}

bool Monster_Spawn_Setup(entity this)
{
        Monster mon = Monsters_from(this.monsterid);
        mon.mr_setup(mon, this);

        // ensure some basic needs are met
        if(!this.health) { this.health = 100; }
        if(!this.armorvalue) { this.armorvalue = bound(0.2, 0.5 * MONSTER_SKILLMOD(this), 0.9); }
        if(!this.target_range) { this.target_range = autocvar_g_monsters_target_range; }
        if(!this.respawntime) { this.respawntime = autocvar_g_monsters_respawn_delay; }
        if(!this.monster_moveflags) { this.monster_moveflags = MONSTER_MOVE_WANDER; }
        if(!this.attack_range) { this.attack_range = autocvar_g_monsters_attack_range; }
        if(!this.damageforcescale) { this.damageforcescale = autocvar_g_monsters_damageforcescale; }

        if(!(this.spawnflags & MONSTERFLAG_RESPAWNED))
        {
                Monster_Miniboss_Check(this);
                this.health *= MONSTER_SKILLMOD(this);

                if(!this.skin)
                        this.skin = rint(random() * 4);
        }

        this.max_health = this.health;
        this.pain_finished = this.nextthink;

        if(IS_PLAYER(this.monster_follow))
                this.effects |= EF_DIMLIGHT;

        if(!this.wander_delay) { this.wander_delay = 2; }
        if(!this.wander_distance) { this.wander_distance = 600; }

        Monster_Sounds_Precache(this);
        Monster_Sounds_Update(this);

        if(teamplay)
                this.monster_attack = true; // we can have monster enemies in team games

        Monster_Sound(this, monstersound_spawn, 0, false, CH_VOICE);

        if(autocvar_g_monsters_healthbars)
        {
                entity wp = WaypointSprite_Spawn(WP_Monster, 0, 1024, this, '0 0 1' * (this.maxs.z + 15), world, this.team, this, sprite, true, RADARICON_DANGER);
                wp.wp_extra = this.monsterid;
                wp.colormod = ((this.team) ? Team_ColorRGB(this.team) : '1 0 0');
                if(!(this.spawnflags & MONSTERFLAG_INVINCIBLE))
                {
                        WaypointSprite_UpdateMaxHealth(this.sprite, this.max_health);
                        WaypointSprite_UpdateHealth(this.sprite, this.health);
                }
        }

        setthink(this, Monster_Think);
        this.nextthink = time + this.ticrate;

        if(MUTATOR_CALLHOOK(MonsterSpawn, this))
                return false;

        return true;
}

bool Monster_Spawn(entity this, int mon_id)
{
        // setup the basic required properties for a monster
        entity mon = Monsters_from(mon_id);
        if(!mon.monsterid) { return false; } // invalid monster

        if(!autocvar_g_monsters) { Monster_Remove(this); return false; }

        if(Monster_Appear_Check(this, mon_id)) { return true; } // return true so the monster isn't removed

        if(!this.monster_skill)
                this.monster_skill = cvar("g_monsters_skill");

        // support for quake style removing monsters based on skill
        if(this.monster_skill == MONSTER_SKILL_EASY) if(this.spawnflags & MONSTERSKILL_NOTEASY) { Monster_Remove(this); return false; }
        if(this.monster_skill == MONSTER_SKILL_MEDIUM) if(this.spawnflags & MONSTERSKILL_NOTMEDIUM) { Monster_Remove(this); return false; }
        if(this.monster_skill == MONSTER_SKILL_HARD) if(this.spawnflags & MONSTERSKILL_NOTHARD) { Monster_Remove(this); return false; }

        if(this.team && !teamplay)
                this.team = 0;

        if(!(this.spawnflags & MONSTERFLAG_SPAWNED)) // naturally spawned monster
        if(!(this.spawnflags & MONSTERFLAG_RESPAWNED)) // don't count re-spawning monsters either
                monsters_total += 1;

        setmodel(this, mon.m_model);
        this.flags                              = FL_MONSTER;
        this.classname                  = "monster";
        this.takedamage                 = DAMAGE_AIM;
        this.bot_attack                 = true;
        this.iscreature                 = true;
        this.teleportable               = true;
        this.damagedbycontents  = true;
        this.monsterid                  = mon_id;
        this.event_damage               = Monster_Damage;
        settouch(this, Monster_Touch);
        this.use                                = Monster_Use;
        this.solid                              = SOLID_BBOX;
        this.movetype                   = MOVETYPE_WALK;
        this.spawnshieldtime    = time + autocvar_g_monsters_spawnshieldtime;
        this.enemy                              = world;
        this.velocity                   = '0 0 0';
        this.moveto                             = this.origin;
        this.pos1                               = this.origin;
        this.pos2                               = this.angles;
        this.reset                              = Monster_Reset;
        this.netname                    = mon.netname;
        this.monster_attackfunc = mon.monster_attackfunc;
        this.monster_name               = mon.monster_name;
        this.candrop                    = true;
        this.view_ofs                   = '0 0 0.7' * (this.maxs_z * 0.5);
        this.oldtarget2                 = this.target2;
        this.pass_distance              = 0;
        this.deadflag                   = DEAD_NO;
        this.noalign                    = ((mon.spawnflags & MONSTER_TYPE_FLY) || (mon.spawnflags & MONSTER_TYPE_SWIM));
        this.spawn_time                 = time;
        this.gravity                    = 1;
        this.monster_moveto             = '0 0 0';
        this.monster_face               = '0 0 0';
        this.dphitcontentsmask  = DPCONTENTS_SOLID | DPCONTENTS_BODY | DPCONTENTS_BOTCLIP | DPCONTENTS_MONSTERCLIP;

        if(!this.scale) { this.scale = 1; }
        if(autocvar_g_monsters_edit) { this.grab = 1; }
        if(autocvar_g_fullbrightplayers) { this.effects |= EF_FULLBRIGHT; }
        if(autocvar_g_nodepthtestplayers) { this.effects |= EF_NODEPTHTEST; }
        if(mon.spawnflags & MONSTER_TYPE_SWIM) { this.flags |= FL_SWIM; }

        if(autocvar_g_playerclip_collisions)
                this.dphitcontentsmask |= DPCONTENTS_PLAYERCLIP;

        if(mon.spawnflags & MONSTER_TYPE_FLY)
        {
                this.flags |= FL_FLY;
                this.movetype = MOVETYPE_FLY;
        }

        if(!(this.spawnflags & MONSTERFLAG_RESPAWNED))
        {
                if(mon.spawnflags & MONSTER_SIZE_BROKEN)
                        this.scale *= 1.3;

                if(mon.spawnflags & MONSTER_SIZE_QUAKE)
                if(autocvar_g_monsters_quake_resize)
                        this.scale *= 1.3;
        }

        setsize(this, mon.mins * this.scale, mon.maxs * this.scale);

        this.ticrate = bound(sys_frametime, ((!this.ticrate) ? autocvar_g_monsters_think_delay : this.ticrate), 60);

        Monster_UpdateModel(this);

        if(!Monster_Spawn_Setup(this))
        {
                Monster_Remove(this);
                return false;
        }

        if(!this.noalign)
        {
                setorigin(this, this.origin + '0 0 20');
                tracebox(this.origin + '0 0 64', this.mins, this.maxs, this.origin - '0 0 10000', MOVE_WORLDONLY, this);
                setorigin(this, trace_endpos);
        }

        if(!(this.spawnflags & MONSTERFLAG_RESPAWNED))
                monster_setupcolors(this);

        CSQCMODEL_AUTOINIT(this);

        return true;
}