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//==============================================================================
// Grenades
//==============================================================================

//======================================================================
// constants
//======================================================================
const float GRENADE_DIRECT_DAMAGE = 100;// direct damage; 100 is id1
const float GRENADE_SPLASH_DAMAGE = 120;// splash damage; 120 is id1
const float GRENADE_SPEED = 600;        // id1 grenade speed is 600
const float GRENADE_HEALTH = 50;        // explodes when dead

// found using FTE's sv_gameplayfix_setmodelrealbox
// const vector GRENADE_MINS = '-8.57384 -3.71142 -3.94197';
// const vector GRENADE_MAXS = '10.2459 3.68095 4.05187';
const vector GRENADE_MINS = '-8 -8 -8'; // a little more generous -- CEV
const vector GRENADE_MAXS = '8 8 8';

//======================================================================
// forward declarations
//======================================================================

// projectile_grenade
void(vector dir) projectile_grenade_destroy;
void() projectile_grenade_think;
entity(entity src, vector org, vector vel) spawn_projectile_grenade;
void(entity e) projectile_grenade_init;
strip void() projectile_grenade;

//------------------------------------------------------------------------------

//----------------------------------------------------------------------
// class projectile_grenade: base_projectile_qcphys
// {
        //--------------------------------------------------------------
        void(vector dir) projectile_grenade_destroy =
        {
                if (self.aflag & PROJECTILE_DESTROYED)
                        return;

                self.aflag |= PROJECTILE_DESTROYED;
                self.destroy = sub_nulldestroy;
                self.think = sub_null;
                self.touch = sub_null;
                projectile_grenade_think ();
        };

        //--------------------------------------------------------------
        void() projectile_grenade_think =
        {
                if (self.takedamage)
                        self.takedamage = DAMAGE_NO;

                t_radiusdamage2 (self, self.owner, self.splash_damage, other);

                // BecomeExplosion
                write_explosion (self.origin);
                become_base_explosion (self);
        };

        //--------------------------------------------------------------
        // GrenadeTouch
        //
        // This has been modified to fix a bug in the original code, which
        // is that an entity with a very large bounding box (e.g. the size
        // of monster_boss or monster_oldone) would receive little or no
        // damage from a grenade impact. (In the original game, this bug
        // didn't really matter because the largest DAMAGE_AIM entities
        // were Shambler-sized.)
        //
        // In the original code, this function simply called GrenadeExplode,
        // which called T_RadiusDamage, which deals an amount of damage
        // based on the distance to the center of the victim's bounding box.
        // Therefore, the larger the victim's bounding box, the lower the
        // amount of damage that a grenade impact could deal.
        //
        // This modified version of GrenadeTouch adds a hack so that an
        // entity which is larger than Shambler-size is treated differently:
        // damage will be dealt to it using the same logic as a rocket
        // impact, i.e. T_Damage will be called to deal damage to the
        // impacted entity, and then radius damage will be dealt to any
        // other entities in the vicinity.  Grenades and rockets have
        // always dealt the same amount of radius damage, so making the
        // impact damage the same seemed a reasonable solution.
        //
        // The reason this logic is only used for very large entities is
        // because I didn't want to affect the amount of damage that
        // grenades deal to any of the original monsters under any
        // circumstances.  -- iw
        //--------------------------------------------------------------
        void() projectile_grenade_touch =
        {
                // standard touch check
                if (base_projectile_check_touch())
                        return;

                if (other.takedamage == DAMAGE_AIM)
                {
                        // see the explanation above -- iw
                        if (other.size_x > VEC_HULL2_SIZE_x ||
                                        other.size_y > VEC_HULL2_SIZE_y ||
                                        other.size_z > VEC_HULL2_SIZE_z)
                        {
                                // note that the logic for monster_shambler's
                                // partial immunity to explosions is not
                                // required because this is only for entities
                                // which are larger than monster_shambler -- iw
                                // dmg = this.direct_dmg + random() * 20;
                                t_damage2 (other, self, self.owner,
                                        self.direct_damage);
                                projectile_grenade_think ();
                                return;
                        }
                        other = world;
                        projectile_grenade_think ();
                        return;
                }

                if (self.count < time)
                {
                        // bounce sound
                        sound (self, CHAN_WEAPON, "weapons/bounce.wav",
                                1, ATTN_NORM);
                }

                self.count = time + 0.02;
                if (self.velocity == '0 0 0')
                        self.avelocity = '0 0 0';
        };

        //--------------------------------------------------------------
        entity(entity src, vector org, vector vel) spawn_projectile_grenade =
        {
                local entity e = spawn ();
                e.owner = src;
                e.origin = org;
                e.velocity = vel;
                // damage
                e.direct_damage = GRENADE_DIRECT_DAMAGE;
                e.splash_damage = GRENADE_SPLASH_DAMAGE;
                // model, skin, & sounds
                e.mdl_proj = src.mdl_proj;
                e.skin_proj = src.skin_proj;
                e.snd_hit = src.snd_hit;

                projectile_grenade_init (e);
                return e;
        };

        //--------------------------------------------------------------
        void(entity e) projectile_grenade_init =
        {
                base_projectile_qcphys_init (e);

                e.classname = "grenade";
                e.classtype = CT_PROJECTILE_GRENADE;
                e.movetype = MOVETYPE_BOUNCE;
                e.solid = SOLID_BBOX;
                e.destroy = projectile_grenade_destroy;
                e.touch = projectile_grenade_touch;
                e.aflag |= PROJECTILE_EXPLOSIVE;
                e.health = GRENADE_HEALTH;
                e.takedamage = DAMAGE_YES;
                e.angles = vectoangles (e.velocity);

                if (!e.avelocity)
                        e.avelocity = '300 300 300';

                if (!e.proj_basespeed)
                        e.proj_basespeed = GRENADE_SPEED;

                // default damage for player grenades -- CEV
                if (!e.direct_damage)
                        e.direct_damage = GRENADE_DIRECT_DAMAGE;

                if (!e.splash_damage)
                        e.splash_damage = GRENADE_SPLASH_DAMAGE;

                if (e.mdl_proj && e.mdl_proj != "")
                        setmodel (e, e.mdl_proj);
                else
                        setmodel (e, "progs/grenade.mdl");

                if (e.skin_proj)
                        e.skin = e.skin_proj;
                else
                        e.skin = 0;

                setsize (e, GRENADE_MINS, GRENADE_MAXS);
                setorigin (e, e.origin);

                // schedule next think (explosion time)
                e.think = projectile_grenade_think;
                e.nextthink = time + 2.5;
        };

        //--------------------------------------------------------------
        strip void() projectile_grenade =
        {
                projectile_grenade_init (self);
        };
// };