/*

Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software

Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

*/

// g_turret.c

#include "g_local.h"

void AnglesNormalize(vec3_t vec)

{

while (vec[0] > 360)

vec[0] -= 360;

while (vec[0] < 0)

vec[0] += 360;

while (vec[1] > 360)

vec[1] -= 360;

while (vec[1] < 0)

vec[1] += 360;

}

float SnapToEights(float x)

{

x *= 8.0;

if (x > 0.0)

x += 0.5;

else

x -= 0.5;

return 0.125 * (int)x;

}

void turret_blocked(edict_t * self, edict_t * other)

{

edict_t *attacker;

if (other->takedamage) {

if (self->teammaster->owner)

attacker = self->teammaster->owner;

else

attacker = self->teammaster;

T_Damage(other, self, attacker, vec3_origin, other->s.origin,

vec3_origin, self->teammaster->dmg, 10, 0, MOD_CRUSH);

}

}

/*QUAKED turret_breach (0 0 0) ?

This portion of the turret can change both pitch and yaw.

The model should be made with a flat pitch.

It (and the associated base) need to be oriented towards 0.

Use "angle" to set the starting angle.

"speed" default 50

"dmg" default 10

"angle" point this forward

"target" point this at an info_notnull at the muzzle tip

"minpitch" min acceptable pitch angle : default -30

"maxpitch" max acceptable pitch angle : default 30

"minyaw" min acceptable yaw angle : default 0

"maxyaw" max acceptable yaw angle : default 360

*/

void turret_breach_fire(edict_t * self)

{

vec3_t f, r, u;

vec3_t start;

int damage;

int speed;

AngleVectors(self->s.angles, f, r, u);

VectorMA(self->s.origin, self->move_origin[0], f, start);

VectorMA(start, self->move_origin[1], r, start);

VectorMA(start, self->move_origin[2], u, start);

damage = 100 + random() * 50;

speed = 550 + 50 * skill->value;

fire_rocket(self->teammaster->owner, start, f, damage, speed, 150,

damage);

gi.positioned_sound(start, self, CHAN_WEAPON,

gi.soundindex("weapons/rocklf1a.wav"), 1, ATTN_NORM,

0);

}

void turret_breach_think(edict_t * self)

{

edict_t *ent;

vec3_t current_angles;

vec3_t delta;

VectorCopy(self->s.angles, current_angles);

AnglesNormalize(current_angles);

AnglesNormalize(self->move_angles);

if (self->move_angles[PITCH] > 180)

self->move_angles[PITCH] -= 360;

// clamp angles to mins & maxs

if (self->move_angles[PITCH] > self->pos1[PITCH])

self->move_angles[PITCH] = self->pos1[PITCH];

else if (self->move_angles[PITCH] < self->pos2[PITCH])

self->move_angles[PITCH] = self->pos2[PITCH];

if ((self->move_angles[YAW] < self->pos1[YAW])

|| (self->move_angles[YAW] > self->pos2[YAW])) {

float dmin, dmax;

dmin = fabs(self->pos1[YAW] - self->move_angles[YAW]);

if (dmin < -180)

dmin += 360;

else if (dmin > 180)

dmin -= 360;

dmax = fabs(self->pos2[YAW] - self->move_angles[YAW]);

if (dmax < -180)

dmax += 360;

else if (dmax > 180)

dmax -= 360;

if (fabs(dmin) < fabs(dmax))

self->move_angles[YAW] = self->pos1[YAW];

else

self->move_angles[YAW] = self->pos2[YAW];

}

VectorSubtract(self->move_angles, current_angles, delta);

if (delta[0] < -180)

delta[0] += 360;

else if (delta[0] > 180)

delta[0] -= 360;

if (delta[1] < -180)

delta[1] += 360;

else if (delta[1] > 180)

delta[1] -= 360;

delta[2] = 0;

if (delta[0] > self->speed * FRAMETIME)

delta[0] = self->speed * FRAMETIME;

if (delta[0] < -1 * self->speed * FRAMETIME)

delta[0] = -1 * self->speed * FRAMETIME;

if (delta[1] > self->speed * FRAMETIME)

delta[1] = self->speed * FRAMETIME;

if (delta[1] < -1 * self->speed * FRAMETIME)

delta[1] = -1 * self->speed * FRAMETIME;

VectorScale(delta, 1.0 / FRAMETIME, self->avelocity);

self->nextthink = level.time + FRAMETIME;

for (ent = self->teammaster; ent; ent = ent->teamchain)

ent->avelocity[1] = self->avelocity[1];

// if we have adriver, adjust his velocities

if (self->owner) {

float angle;

float target_z;

float diff;

vec3_t target;

vec3_t dir;

// angular is easy, just copy ours

self->owner->avelocity[0] = self->avelocity[0];

self->owner->avelocity[1] = self->avelocity[1];

// x & y

angle = self->s.angles[1] + self->owner->move_origin[1];

angle *= (M_PI * 2 / 360);

target[0] =

SnapToEights(self->s.origin[0] +

cos(angle) * self->owner->move_origin[0]);

target[1] =

SnapToEights(self->s.origin[1] +

sin(angle) * self->owner->move_origin[0]);

target[2] = self->owner->s.origin[2];

VectorSubtract(target, self->owner->s.origin, dir);

self->owner->velocity[0] = dir[0] * 1.0 / FRAMETIME;

self->owner->velocity[1] = dir[1] * 1.0 / FRAMETIME;

// z

angle = self->s.angles[PITCH] * (M_PI * 2 / 360);

target_z =

SnapToEights(self->s.origin[2] +

self->owner->move_origin[0] * tan(angle) +

self->owner->move_origin[2]);

diff = target_z - self->owner->s.origin[2];

self->owner->velocity[2] = diff * 1.0 / FRAMETIME;

if (self->spawnflags & 65536) {

turret_breach_fire(self);

self->spawnflags &= ~65536;

}

}

}

void turret_breach_finish_init(edict_t * self)

{

// get and save info for muzzle location

if (!self->target) {

gi.dprintf("%s at %s needs a target\n", self->classname,

vtos(self->s.origin));

} else {

self->target_ent = G_PickTarget(self->target);

VectorSubtract(self->target_ent->s.origin, self->s.origin,

self->move_origin);

G_FreeEdict(self->target_ent);

}

self->teammaster->dmg = self->dmg;

self->think = turret_breach_think;

self->think(self);

}

void SP_turret_breach(edict_t * self)

{

self->solid = SOLID_BSP;

self->movetype = MOVETYPE_PUSH;

gi.setmodel(self, self->model);

if (!self->speed)

self->speed = 50;

if (!self->dmg)

self->dmg = 10;

if (!st.minpitch)

st.minpitch = -30;

if (!st.maxpitch)

st.maxpitch = 30;

if (!st.maxyaw)

st.maxyaw = 360;

self->pos1[PITCH] = -1 * st.minpitch;

self->pos1[YAW] = st.minyaw;

self->pos2[PITCH] = -1 * st.maxpitch;

self->pos2[YAW] = st.maxyaw;

self->ideal_yaw = self->s.angles[YAW];

self->move_angles[YAW] = self->ideal_yaw;

self->blocked = turret_blocked;

self->think = turret_breach_finish_init;

self->nextthink = level.time + FRAMETIME;

gi.linkentity(self);

}

/*QUAKED turret_base (0 0 0) ?

This portion of the turret changes yaw only.

MUST be teamed with a turret_breach.

*/

void SP_turret_base(edict_t * self)

{

self->solid = SOLID_BSP;

self->movetype = MOVETYPE_PUSH;

gi.setmodel(self, self->model);

self->blocked = turret_blocked;

gi.linkentity(self);

}

/*QUAKED turret_driver (1 .5 0) (-16 -16 -24) (16 16 32)

Must NOT be on the team with the rest of the turret parts.

Instead it must target the turret_breach.

*/

void infantry_die(edict_t * self, edict_t * inflictor, edict_t * attacker,

int damage);

void infantry_stand(edict_t * self);

void monster_use(edict_t * self, edict_t * other, edict_t * activator);

void turret_driver_die(edict_t * self, edict_t * inflictor, edict_t * attacker,

int damage, vec3_t point)

{

edict_t *ent;

// level the gun

self->target_ent->move_angles[0] = 0;

// remove the driver from the end of them team chain

for (ent = self->target_ent->teammaster; ent->teamchain != self;

ent = ent->teamchain) ;

ent->teamchain = NULL;

self->teammaster = NULL;

self->flags &= ~FL_TEAMSLAVE;

self->target_ent->owner = NULL;

self->target_ent->teammaster->owner = NULL;

infantry_die(self, inflictor, attacker, damage);

}

qboolean FindTarget(edict_t * self);

void turret_driver_think(edict_t * self)

{

vec3_t target;

vec3_t dir;

float reaction_time;

self->nextthink = level.time + FRAMETIME;

if (self->enemy && (!self->enemy->inuse || self->enemy->health <= 0))

self->enemy = NULL;

if (!self->enemy) {

if (!FindTarget(self))

return;

self->monsterinfo.trail_time = level.time;

self->monsterinfo.aiflags &= ~AI_LOST_SIGHT;

} else {

if (visible(self, self->enemy)) {

if (self->monsterinfo.aiflags & AI_LOST_SIGHT) {

self->monsterinfo.trail_time = level.time;

self->monsterinfo.aiflags &= ~AI_LOST_SIGHT;

}

} else {

self->monsterinfo.aiflags |= AI_LOST_SIGHT;

return;

}

}

// let the turret know where we want it to aim

VectorCopy(self->enemy->s.origin, target);

target[2] += self->enemy->viewheight;

VectorSubtract(target, self->target_ent->s.origin, dir);

vectoangles(dir, self->target_ent->move_angles);

// decide if we should shoot

if (level.time < self->monsterinfo.attack_finished)

return;

reaction_time = (3 - skill->value) * 1.0;

if ((level.time - self->monsterinfo.trail_time) < reaction_time)

return;

self->monsterinfo.attack_finished = level.time + reaction_time + 1.0;

//FIXME how do we really want to pass this along?

self->target_ent->spawnflags |= 65536;

}

void turret_driver_link(edict_t * self)

{

vec3_t vec;

edict_t *ent;

self->think = turret_driver_think;

self->nextthink = level.time + FRAMETIME;

self->target_ent = G_PickTarget(self->target);

self->target_ent->owner = self;

self->target_ent->teammaster->owner = self;

VectorCopy(self->target_ent->s.angles, self->s.angles);

vec[0] = self->target_ent->s.origin[0] - self->s.origin[0];

vec[1] = self->target_ent->s.origin[1] - self->s.origin[1];

vec[2] = 0;

self->move_origin[0] = VectorLength(vec);

VectorSubtract(self->s.origin, self->target_ent->s.origin, vec);

vectoangles(vec, vec);

AnglesNormalize(vec);

self->move_origin[1] = vec[1];

self->move_origin[2] =

self->s.origin[2] - self->target_ent->s.origin[2];

// add the driver to the end of them team chain

for (ent = self->target_ent->teammaster; ent->teamchain;

ent = ent->teamchain) ;

ent->teamchain = self;

self->teammaster = self->target_ent->teammaster;

self->flags |= FL_TEAMSLAVE;

}

void SP_turret_driver(edict_t * self)

{

if (deathmatch->value) {

G_FreeEdict(self);

return;

}

self->movetype = MOVETYPE_PUSH;

self->solid = SOLID_BBOX;

self->s.modelindex = gi.modelindex("models/monsters/infantry/tris.md2");

VectorSet(self->mins, -16, -16, -24);

VectorSet(self->maxs, 16, 16, 32);

self->health = 100;

self->gib_health = 0;

self->mass = 200;

self->viewheight = 24;

self->die = turret_driver_die;

self->monsterinfo.stand = infantry_stand;

self->flags |= FL_NO_KNOCKBACK;

level.total_monsters++;

self->svflags |= SVF_MONSTER;

self->s.renderfx |= RF_FRAMELERP;

self->takedamage = DAMAGE_AIM;

self->use = monster_use;

self->clipmask = MASK_MONSTERSOLID;

VectorCopy(self->s.origin, self->s.old_origin);

self->monsterinfo.aiflags |= AI_STAND_GROUND | AI_DUCKED;

if (st.item) {

self->item = FindItemByClassname(st.item);

if (!self->item)

gi.dprintf("%s at %s has bad item: %s\n",

self->classname, vtos(self->s.origin),

st.item);

}

self->think = turret_driver_link;

self->nextthink = level.time + FRAMETIME;

gi.linkentity(self);

}