g_target.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

//==========================================================

/*QUAKED target_blaster (1 0 0) (-8 -8 -8) (8 8 8) NOTRAIL NOEFFECTS
Fires a blaster bolt in the set direction when triggered.

dmg		default is 15
speed	default is 1000
*/

void use_target_blaster (edict_t *self, edict_t *other, edict_t *activator)
{
	int effect;

	if (self->spawnflags & 2)
		effect = 0;
	else if (self->spawnflags & 1)
		effect = EF_HYPERBLASTER;
	else
		effect = EF_BLASTER;

	fire_blaster (self, self->s.origin, self->movedir, self->dmg, self->speed, EF_BLASTER, MOD_TARGET_BLASTER);
	gi.sound (self, CHAN_VOICE, self->noise_index, 1, ATTN_NORM, 0);
}

void SP_target_blaster (edict_t *self)
{
	self->use = use_target_blaster;
	G_SetMovedir (self->s.angles, self->movedir);
	self->noise_index = gi.soundindex ("weapons/laser2.wav");

	if (!self->dmg)
		self->dmg = 15;
	if (!self->speed)
		self->speed = 1000;

	self->svflags = SVF_NOCLIENT;
}


//==========================================================

/*QUAKED target_crosslevel_trigger (.5 .5 .5) (-8 -8 -8) (8 8 8) trigger1 trigger2 trigger3 trigger4 trigger5 trigger6 trigger7 trigger8
Once this trigger is touched/used, any trigger_crosslevel_target with the same trigger number is automatically used when a level is started within the same unit.  It is OK to check multiple triggers.  Message, delay, target, and killtarget also work.
*/
void trigger_crosslevel_trigger_use (edict_t *self, edict_t *other, edict_t *activator)
{
	game.serverflags |= self->spawnflags;
	G_FreeEdict (self);
}

void SP_target_crosslevel_trigger (edict_t *self)
{
	self->svflags = SVF_NOCLIENT;
	self->use = trigger_crosslevel_trigger_use;
}

/*QUAKED target_crosslevel_target (.5 .5 .5) (-8 -8 -8) (8 8 8) trigger1 trigger2 trigger3 trigger4 trigger5 trigger6 trigger7 trigger8
Triggered by a trigger_crosslevel elsewhere within a unit.  If multiple triggers are checked, all must be true.  Delay, target and
killtarget also work.

"delay"		delay before using targets if the trigger has been activated (default 1)
*/
void target_crosslevel_target_think (edict_t *self)
{
	if (self->spawnflags == (game.serverflags & SFL_CROSS_TRIGGER_MASK & self->spawnflags))
	{
		G_UseTargets (self, self);
		G_FreeEdict (self);
	}
}

void SP_target_crosslevel_target (edict_t *self)
{
	if (! self->delay)
		self->delay = 1;
	self->svflags = SVF_NOCLIENT;

	self->think = target_crosslevel_target_think;
	self->nextthink = level.time + self->delay;
}

//==========================================================

/*QUAKED target_laser (0 .5 .8) (-8 -8 -8) (8 8 8) START_ON RED GREEN BLUE YELLOW ORANGE FAT
When triggered, fires a laser.  You can either set a target
or a direction.
*/

void target_laser_think (edict_t *self)
{
	edict_t	*ignore;
	vec3_t	start;
	vec3_t	end;
	trace_t	tr;
	vec3_t	point;
	vec3_t	last_movedir;
	int		count;

	if (self->spawnflags & 0x80000000)
		count = 8;
	else
		count = 4;

	if (self->enemy)
	{
		VectorCopy (self->movedir, last_movedir);
		VectorMA (self->enemy->absmin, 0.5, self->enemy->size, point);
		VectorSubtract (point, self->s.origin, self->movedir);
		VectorNormalize (self->movedir);
		if (!VectorCompare(self->movedir, last_movedir))
			self->spawnflags |= 0x80000000;
	}

	ignore = self;
	VectorCopy (self->s.origin, start);
	VectorMA (start, 2048, self->movedir, end);
	while(1)
	{
		tr = gi.trace (start, NULL, NULL, end, ignore, CONTENTS_SOLID|CONTENTS_MONSTER|CONTENTS_DEADMONSTER);

		if (!tr.ent)
			break;

		// hurt it if we can
		if ((tr.ent->takedamage) && !(tr.ent->flags & FL_IMMUNE_LASER))
			T_Damage (tr.ent, self, self->activator, self->movedir, tr.endpos, vec3_origin, self->dmg, 1, DAMAGE_ENERGY, MOD_TARGET_LASER);

		// if we hit something that's not a monster or player or is immune to lasers, we're done
		if (!(tr.ent->svflags & SVF_MONSTER) && (!tr.ent->client))
		{
			if (self->spawnflags & 0x80000000)
			{
				self->spawnflags &= ~0x80000000;
				gi.WriteByte (svc_temp_entity);
				gi.WriteByte (TE_LASER_SPARKS);
				gi.WriteByte (count);
				gi.WritePosition (tr.endpos);
				gi.WriteDir (tr.plane.normal);
				gi.WriteByte (self->s.skinnum);
				gi.multicast (tr.endpos, MULTICAST_PVS);
			}
			break;
		}

		ignore = tr.ent;
		VectorCopy (tr.endpos, start);
	}

	VectorCopy (tr.endpos, self->s.old_origin);

	self->nextthink = level.time + FRAMETIME;
}

void target_laser_on (edict_t *self)
{
	if (!self->activator)
		self->activator = self;
	self->spawnflags |= 0x80000001;
	self->svflags &= ~SVF_NOCLIENT;
	target_laser_think (self);
}

void target_laser_off (edict_t *self)
{
	self->spawnflags &= ~1;
	self->svflags |= SVF_NOCLIENT;
	self->nextthink = 0;
}

void target_laser_use (edict_t *self, edict_t *other, edict_t *activator)
{
	self->activator = activator;
	if (self->spawnflags & 1)
		target_laser_off (self);
	else
		target_laser_on (self);
}

void target_laser_start (edict_t *self)
{
	edict_t *ent;

	self->movetype = MOVETYPE_NONE;
	self->solid = SOLID_NOT;
	self->s.renderfx |= RF_BEAM|RF_TRANSLUCENT;
	self->s.modelindex = 1;			// must be non-zero

	// set the beam diameter
	if (self->spawnflags & 64)
		self->s.frame = 16;
	else
		self->s.frame = 4;

	// set the color
	if (self->spawnflags & 2)
		self->s.skinnum = 0xf2f2f0f0;
	else if (self->spawnflags & 4)
		self->s.skinnum = 0xd0d1d2d3;
	else if (self->spawnflags & 8)
		self->s.skinnum = 0xf3f3f1f1;
	else if (self->spawnflags & 16)
		self->s.skinnum = 0xdcdddedf;
	else if (self->spawnflags & 32)
		self->s.skinnum = 0xe0e1e2e3;

	if (!self->enemy)
	{
		if (self->target)
		{
			ent = G_Find (NULL, FOFS(targetname), self->target);
			if (!ent)
				gi.dprintf ("%s at %s: %s is a bad target\n", self->classname, vtos(self->s.origin), self->target);
			self->enemy = ent;
		}
		else
		{
			G_SetMovedir (self->s.angles, self->movedir);
		}
	}
	self->use = target_laser_use;
	self->think = target_laser_think;

	if (!self->dmg)
		self->dmg = 1;

	VectorSet (self->mins, -8, -8, -8);
	VectorSet (self->maxs, 8, 8, 8);
	gi.linkentity (self);

	if (self->spawnflags & 1)
		target_laser_on (self);
	else
		target_laser_off (self);
}

void SP_target_laser (edict_t *self)
{
	// let everything else get spawned before we start firing
	self->think = target_laser_start;
	self->nextthink = level.time + 1;
}

//==========================================================

/*QUAKED target_lightramp (0 .5 .8) (-8 -8 -8) (8 8 8) TOGGLE
speed		How many seconds the ramping will take
message		two letters; starting lightlevel and ending lightlevel
*/

void target_lightramp_think (edict_t *self)
{
	char	style[2];

	style[0] = 'a' + self->movedir[0] + (level.time - self->timestamp) / FRAMETIME * self->movedir[2];
	style[1] = 0;
	gi.configstring (CS_LIGHTS+self->enemy->style, style);

	if ((level.time - self->timestamp) < self->speed)
	{
		self->nextthink = level.time + FRAMETIME;
	}
	else if (self->spawnflags & 1)
	{
		char	temp;

		temp = self->movedir[0];
		self->movedir[0] = self->movedir[1];
		self->movedir[1] = temp;
		self->movedir[2] *= -1;
	}
}

void target_lightramp_use (edict_t *self, edict_t *other, edict_t *activator)
{
	if (!self->enemy)
	{
		edict_t		*e;

		// check all the targets
		e = NULL;
		while (1)
		{
			e = G_Find (e, FOFS(targetname), self->target);
			if (!e)
				break;
			if (strcmp(e->classname, "light") != 0)
			{
				gi.dprintf("%s at %s ", self->classname, vtos(self->s.origin));
				gi.dprintf("target %s (%s at %s) is not a light\n", self->target, e->classname, vtos(e->s.origin));
			}
			else
			{
				self->enemy = e;
			}
		}

		if (!self->enemy)
		{
			gi.dprintf("%s target %s not found at %s\n", self->classname, self->target, vtos(self->s.origin));
			G_FreeEdict (self);
			return;
		}
	}

	self->timestamp = level.time;
	target_lightramp_think (self);
}

void SP_target_lightramp (edict_t *self)
{
	if (!self->message || strlen(self->message) != 2 || self->message[0] < 'a' || self->message[0] > 'z' || self->message[1] < 'a' || self->message[1] > 'z' || self->message[0] == self->message[1])
	{
		gi.dprintf("target_lightramp has bad ramp (%s) at %s\n", self->message, vtos(self->s.origin));
		G_FreeEdict (self);
		return;
	}

	if (deathmatch->value)
	{
		G_FreeEdict (self);
		return;
	}

	if (!self->target)
	{
		gi.dprintf("%s with no target at %s\n", self->classname, vtos(self->s.origin));
		G_FreeEdict (self);
		return;
	}

	self->svflags |= SVF_NOCLIENT;
	self->use = target_lightramp_use;
	self->think = target_lightramp_think;

	self->movedir[0] = self->message[0] - 'a';
	self->movedir[1] = self->message[1] - 'a';
	self->movedir[2] = (self->movedir[1] - self->movedir[0]) / (self->speed / FRAMETIME);
}

//==========================================================

/*QUAKED target_earthquake (1 0 0) (-8 -8 -8) (8 8 8)
When triggered, this initiates a level-wide earthquake.
All players and monsters are affected.
"speed"		severity of the quake (default:200)
"count"		duration of the quake (default:5)
*/

void target_earthquake_think (edict_t *self)
{
	int		i;
	edict_t	*e;

	if (self->last_move_time < level.time)
	{
		gi.positioned_sound (self->s.origin, self, CHAN_AUTO, self->noise_index, 1.0, ATTN_NONE, 0);
		self->last_move_time = level.time + 0.5;
	}

	for (i=1, e=g_edicts+i; i < globals.num_edicts; i++,e++)
	{
		if (!e->inuse)
			continue;
		if (!e->client)
			continue;
		if (!e->groundentity)
			continue;

		e->groundentity = NULL;
		e->velocity[0] += crandom()* 150;
		e->velocity[1] += crandom()* 150;
		e->velocity[2] = self->speed * (100.0 / e->mass);
	}

	if (level.time < self->timestamp)
		self->nextthink = level.time + FRAMETIME;
}

void target_earthquake_use (edict_t *self, edict_t *other, edict_t *activator)
{
	self->timestamp = level.time + self->count;
	self->nextthink = level.time + FRAMETIME;
	self->activator = activator;
	self->last_move_time = 0;
}

void SP_target_earthquake (edict_t *self)
{
	if (!self->targetname)
		gi.dprintf("untargeted %s at %s\n", self->classname, vtos(self->s.origin));

	if (!self->count)
		self->count = 5;

	if (!self->speed)
		self->speed = 200;

	self->svflags |= SVF_NOCLIENT;
	self->think = target_earthquake_think;
	self->use = target_earthquake_use;

	self->noise_index = gi.soundindex ("world/quake.wav");
}