src/baseq2/g_weapon.c

/*
* Copyright(c) 1997-2001 Id Software, Inc.
* Copyright(c) 2002 The Quakeforge Project.
* Copyright(c) 2006 Quetoo.
*
* 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.
*/

#include "g_local.h"

/*
check_dodge

This is a support routine used when a client is firing
a non-instant attack weapon.  It checks to see if a
monster's dodge function should be called.
*/
static void check_dodge(edict_t *self, vec3_t start, vec3_t dir, int speed){
	vec3_t end;
	vec3_t v;
	trace_t tr;
	float eta;

	if(deathmatch->value)  //not needed in deathmatch
		return;

	// easy mode only ducks one quarter the time
	if(skill->value == 0){
		if(random() > 0.25)
			return;
	}
	VectorMA(start, 8192, dir, end);
	tr = gi.trace(start, NULL, NULL, end, self, MASK_SHOT);
	if((tr.ent) &&(tr.ent->svflags & SVF_MONSTER) &&(tr.ent->health > 0) &&(tr.ent->monsterinfo.dodge) && infront(tr.ent, self)){
		VectorSubtract(tr.endpos, start, v);
		eta =(VectorLength(v) - tr.ent->maxs[0]) / speed;
		tr.ent->monsterinfo.dodge(tr.ent, self, eta);
	}
}


/*
fire_hit

Used for all impact(hit/punch/slash) attacks
*/
qboolean fire_hit(edict_t *self, vec3_t aim, int damage, int kick){
	trace_t tr;
	vec3_t forward, right, up;
	vec3_t v;
	vec3_t point;
	float range;
	vec3_t dir;

	//see if enemy is in range
	VectorSubtract(self->enemy->s.origin, self->s.origin, dir);
	range = VectorLength(dir);
	if(range > aim[0])
		return false;

	if(aim[1] > self->mins[0] && aim[1] < self->maxs[0]){
	// the hit is straight on so back the range up to the edge of their bbox
		range -= self->enemy->maxs[0];
	} else {
	// this is a side hit so adjust the "right" value out to the edge of their bbox
		if(aim[1] < 0)
			aim[1] = self->enemy->mins[0];
		else
			aim[1] = self->enemy->maxs[0];
	}

	VectorMA(self->s.origin, range, dir, point);

	tr = gi.trace(self->s.origin, NULL, NULL, point, self, MASK_SHOT);
	if(tr.fraction < 1){
		if(!tr.ent->takedamage)
			return false;
	// if it will hit any client/monster then hit the one we wanted to hit
		if((tr.ent->svflags & SVF_MONSTER) ||(tr.ent->client))
			tr.ent = self->enemy;
	}

	AngleVectors(self->s.angles, forward, right, up);
	VectorMA(self->s.origin, range, forward, point);
	VectorMA(point, aim[1], right, point);
	VectorMA(point, aim[2], up, point);
	VectorSubtract(point, self->enemy->s.origin, dir);

	// do the damage
	T_Damage(tr.ent, self, self, dir, point, vec3_origin, damage, kick / 2, DAMAGE_NO_KNOCKBACK, MOD_HIT);

	if(!(tr.ent->svflags & SVF_MONSTER) &&(!tr.ent->client))
		return false;

	// do our special form of knockback here
	VectorMA(self->enemy->absmin, 0.5, self->enemy->size, v);
	VectorSubtract(v, point, v);
	VectorNormalize(v);
	VectorMA(self->enemy->velocity, kick, v, self->enemy->velocity);
	if(self->enemy->velocity[2] > 0)
		self->enemy->groundentity = NULL;
	return true;
}


/*
fire_lead

This is an internal support routine used for bullet/pellet based weapons.
*/
static void fire_lead(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int kick, int te_impact, int hspread, int vspread, int mod){
	trace_t tr;
	vec3_t dir;
	vec3_t forward, right, up;
	vec3_t end;
	float r;
	float u;
	vec3_t water_start;
	qboolean	water = false;
	int content_mask = MASK_SHOT | MASK_WATER;

	tr = gi.trace(self->s.origin, NULL, NULL, start, self, MASK_SHOT);
	if(!(tr.fraction < 1.0)){
		vectoangles(aimdir, dir);
		AngleVectors(dir, forward, right, up);

		r = crandom() * hspread;
		u = crandom() * vspread;
		VectorMA(start, 8192, forward, end);
		VectorMA(end, r, right, end);
		VectorMA(end, u, up, end);

		if(gi.pointcontents(start) & MASK_WATER){
			water = true;
			VectorCopy(start, water_start);
			content_mask &= ~MASK_WATER;
		}

		tr = gi.trace(start, NULL, NULL, end, self, content_mask);

	// see if we hit water
		if(tr.contents & MASK_WATER){
			int color;

			water = true;
			VectorCopy(tr.endpos, water_start);

			if(!VectorCompare(start, tr.endpos)){
				if(tr.contents & CONTENTS_WATER){
					if(strcmp(tr.surface->name, "*brwater") == 0)
						color = SPLASH_BROWN_WATER;
					else
						color = SPLASH_BLUE_WATER;
				} else if(tr.contents & CONTENTS_SLIME)
					color = SPLASH_SLIME;
				else if(tr.contents & CONTENTS_LAVA)
					color = SPLASH_LAVA;
				else
					color = SPLASH_UNKNOWN;

				if(color != SPLASH_UNKNOWN){
					gi.WriteByte(svc_temp_entity);
					gi.WriteByte(TE_SPLASH);
					gi.WriteByte(8);
					gi.WritePosition(tr.endpos);
					gi.WriteDir(tr.plane.normal);
					gi.WriteByte(color);
					gi.multicast(tr.endpos, MULTICAST_PVS);
				}

	// change bullet's course when it enters water
				VectorSubtract(end, start, dir);
				vectoangles(dir, dir);
				AngleVectors(dir, forward, right, up);
				r = crandom() * hspread * 2;
				u = crandom() * vspread * 2;
				VectorMA(water_start, 8192, forward, end);
				VectorMA(end, r, right, end);
				VectorMA(end, u, up, end);
			}

	// re-trace ignoring water this time
			tr = gi.trace(water_start, NULL, NULL, end, self, MASK_SHOT);
		}
	}

	// send gun puff / flash
	if(!((tr.surface) &&(tr.surface->flags & SURF_SKY))){
		if(tr.fraction < 1.0){
			if(tr.ent->takedamage){
				T_Damage(tr.ent, self, self, aimdir, tr.endpos, tr.plane.normal, damage, kick, DAMAGE_BULLET, mod);
			} else {
				if(strncmp(tr.surface->name, "sky", 3) != 0){
					gi.WriteByte(svc_temp_entity);
					gi.WriteByte(te_impact);
					gi.WritePosition(tr.endpos);
					gi.WriteDir(tr.plane.normal);
					gi.multicast(tr.endpos, MULTICAST_PVS);

					if(self->client)
						PlayerNoise(self, tr.endpos, PNOISE_IMPACT);
				}
			}
		}
	}

	// if went through water, determine where the end and make a bubble trail
	if(water){
		vec3_t pos;

		VectorSubtract(tr.endpos, water_start, dir);
		VectorNormalize(dir);
		VectorMA(tr.endpos, -2, dir, pos);
		if(gi.pointcontents(pos) & MASK_WATER)
			VectorCopy(pos, tr.endpos);
		else
			tr = gi.trace(pos, NULL, NULL, water_start, tr.ent, MASK_WATER);

		VectorAdd(water_start, tr.endpos, pos);
		VectorScale(pos, 0.5, pos);

		gi.WriteByte(svc_temp_entity);
		gi.WriteByte(TE_BUBBLETRAIL);
		gi.WritePosition(water_start);
		gi.WritePosition(tr.endpos);
		gi.multicast(pos, MULTICAST_PVS);
	}
}


/*
fire_bullet

Fires a single round.  Used for machinegun and chaingun.  Would be fine for
pistols, rifles, etc....
*/
void fire_bullet(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int kick, int hspread, int vspread, int mod){
	fire_lead(self, start, aimdir, damage, kick, TE_GUNSHOT, hspread, vspread, mod);
}


/*
fire_shotgun

Shoots shotgun pellets.  Used by shotgun and super shotgun.
*/
void fire_shotgun(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int kick, int hspread, int vspread, int count, int mod){
	int i;

	for(i = 0; i < count; i++)
		fire_lead(self, start, aimdir, damage, kick, TE_SHOTGUN, hspread, vspread, mod);
}


/*
fire_blaster

Fires a single blaster bolt.  Used by the blaster and hyper blaster.
*/
void blaster_touch(edict_t *self, edict_t *other, cplane_t *plane, csurface_t *surf){
	int mod;

	if(other == self->owner)
		return;

	if(surf &&(surf->flags & SURF_SKY)){
		G_FreeEdict(self);
		return;
	}

	if(self->owner->client)
		PlayerNoise(self->owner, self->s.origin, PNOISE_IMPACT);

	if(other->takedamage){
		if(self->spawnflags & 1)
			mod = MOD_HYPERBLASTER;
		else
			mod = MOD_BLASTER;
		T_Damage(other, self, self->owner, self->velocity, self->s.origin, plane->normal, self->dmg, 1, DAMAGE_ENERGY, mod);
	} else {
		gi.WriteByte(svc_temp_entity);
		gi.WriteByte(TE_BLASTER);
		gi.WritePosition(self->s.origin);
		if(!plane)
			gi.WriteDir(vec3_origin);
		else
			gi.WriteDir(plane->normal);
		gi.multicast(self->s.origin, MULTICAST_PVS);
	}

	G_FreeEdict(self);
}

void fire_blaster(edict_t *self, vec3_t start, vec3_t dir, int damage, int speed, int effect, qboolean hyper){
	edict_t *bolt;
	trace_t tr;

	VectorNormalize(dir);

	bolt = G_Spawn();
	bolt->svflags = SVF_DEADMONSTER;
	// yes, I know it looks weird that projectiles are deadmonsters
	// what this means is that when prediction is used against the object
	//(blaster/hyperblaster shots), the player won't be solid clipped against
	// the object.  Right now trying to run into a firing hyperblaster
	// is very jerky since you are predicted 'against' the shots.
	VectorCopy(start, bolt->s.origin);
	VectorCopy(start, bolt->s.old_origin);
	vectoangles(dir, bolt->s.angles);
	VectorScale(dir, speed, bolt->velocity);
	bolt->movetype = MOVETYPE_FLYMISSILE;
	bolt->clipmask = MASK_SHOT;
	bolt->solid = SOLID_BBOX;
	bolt->s.effects |= effect;
	VectorClear(bolt->mins);
	VectorClear(bolt->maxs);
	bolt->s.modelindex = gi.modelindex("models/objects/laser/tris.md2");
	bolt->s.sound = gi.soundindex("misc/lasfly.wav");
	bolt->owner = self;
	bolt->touch = blaster_touch;
	bolt->nextthink = level.time + 2;
	bolt->think = G_FreeEdict;
	bolt->dmg = damage;
	bolt->classname = "bolt";
	bolt->s.renderfx = RF_NOSHADOW;
	if(hyper)
		bolt->spawnflags = 1;
	gi.linkentity(bolt);

	if(self->client)
		check_dodge(self, bolt->s.origin, dir, speed);

	tr = gi.trace(self->s.origin, NULL, NULL, bolt->s.origin, bolt, MASK_SHOT);
	if(tr.fraction < 1.0){
		VectorMA(bolt->s.origin, -10, dir, bolt->s.origin);
		bolt->touch(bolt, tr.ent, NULL, NULL);
	}
}


/*
fire_grenade
*/
static void Grenade_Explode(edict_t *ent){
	vec3_t origin;
	int mod;

	if(ent->owner->client)
		PlayerNoise(ent->owner, ent->s.origin, PNOISE_IMPACT);

	//FIXME: if we are onground then raise our Z just a bit since we are a point?
	if(ent->enemy){
		float points;
		vec3_t v;
		vec3_t dir;

		VectorAdd(ent->enemy->mins, ent->enemy->maxs, v);
		VectorMA(ent->enemy->s.origin, 0.5, v, v);
		VectorSubtract(ent->s.origin, v, v);
		points = ent->dmg - 0.5 * VectorLength(v);
		VectorSubtract(ent->enemy->s.origin, ent->s.origin, dir);
		if(ent->spawnflags & 1)
			mod = MOD_HANDGRENADE;
		else
			mod = MOD_GRENADE;
		T_Damage(ent->enemy, ent, ent->owner, dir, ent->s.origin, vec3_origin,(int)points,(int)points, DAMAGE_RADIUS, mod);
	}

	if(ent->spawnflags & 2)
		mod = MOD_HELD_GRENADE;
	else if(ent->spawnflags & 1)
		mod = MOD_HG_SPLASH;
	else
		mod = MOD_G_SPLASH;
	T_RadiusDamage(ent, ent->owner, ent->dmg, ent->enemy, ent->dmg_radius, mod);

	VectorMA(ent->s.origin, -0.02, ent->velocity, origin);
	gi.WriteByte(svc_temp_entity);
	if(ent->waterlevel){
		if(ent->groundentity)
			gi.WriteByte(TE_GRENADE_EXPLOSION_WATER);
		else
			gi.WriteByte(TE_ROCKET_EXPLOSION_WATER);
	} else {
		if(ent->groundentity)
			gi.WriteByte(TE_GRENADE_EXPLOSION);
		else
			gi.WriteByte(TE_ROCKET_EXPLOSION);
	}
	gi.WritePosition(origin);
	gi.multicast(ent->s.origin, MULTICAST_PHS);

	G_FreeEdict(ent);
}

static void Grenade_Touch(edict_t *ent, edict_t *other, cplane_t *plane, csurface_t *surf){
	if(other == ent->owner)
		return;

	if(surf &&(surf->flags & SURF_SKY)){
		G_FreeEdict(ent);
		return;
	}

	if(!other->takedamage){
		if(ent->spawnflags & 1){
			if(random() > 0.5)
				gi.sound(ent, CHAN_VOICE, gi.soundindex("weapons/hgrenb1a.wav"), 1, ATTN_NORM, 0);
			else
				gi.sound(ent, CHAN_VOICE, gi.soundindex("weapons/hgrenb2a.wav"), 1, ATTN_NORM, 0);
		} else {
			gi.sound(ent, CHAN_VOICE, gi.soundindex("weapons/grenlb1b.wav"), 1, ATTN_NORM, 0);
		}
		return;
	}

	ent->enemy = other;
	Grenade_Explode(ent);
}

/* gren launcher */
void fire_grenade(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int speed, float timer, float damage_radius){
	edict_t *grenade;
	vec3_t dir;
	vec3_t forward, right, up;

	vectoangles(aimdir, dir);
	AngleVectors(dir, forward, right, up);

	grenade = G_Spawn();
	VectorCopy(start, grenade->s.origin);
	VectorScale(aimdir, speed, grenade->velocity);
	VectorMA(grenade->velocity, 200 + crandom() * 10.0, up, grenade->velocity);
	VectorMA(grenade->velocity, crandom() * 10.0, right, grenade->velocity);
	VectorSet(grenade->avelocity, 300, 300, 300);
	grenade->movetype = MOVETYPE_BOUNCE;
	grenade->clipmask = MASK_SHOT;
	grenade->solid = SOLID_BBOX;
	grenade->s.effects |= EF_GRENADE;
	VectorClear(grenade->mins);
	VectorClear(grenade->maxs);
	grenade->s.modelindex = gi.modelindex("models/objects/grenade/tris.md2");
	grenade->owner = self;
	grenade->touch = Grenade_Touch;
	grenade->nextthink = level.time + timer;
	grenade->think = Grenade_Explode;
	grenade->dmg = damage;
	grenade->dmg_radius = damage_radius;
	grenade->classname = "grenade";

	gi.linkentity(grenade);
}

/* hand grenade */
void fire_grenade2(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int speed, float timer, float damage_radius, qboolean held){
	edict_t *grenade;
	vec3_t dir;
	vec3_t forward, right, up;

	vectoangles(aimdir, dir);
	AngleVectors(dir, forward, right, up);

	grenade = G_Spawn();
	VectorCopy(start, grenade->s.origin);
	VectorScale(aimdir, speed, grenade->velocity);
	VectorMA(grenade->velocity, 200 + crandom() * 10.0, up, grenade->velocity);
	VectorMA(grenade->velocity, crandom() * 10.0, right, grenade->velocity);
	VectorSet(grenade->avelocity, 300, 300, 300);
	grenade->movetype = MOVETYPE_BOUNCE;
	grenade->clipmask = MASK_SHOT;
	grenade->solid = SOLID_BBOX;
	grenade->s.effects |= EF_GRENADE;
	VectorClear(grenade->mins);
	VectorClear(grenade->maxs);
	grenade->s.modelindex = gi.modelindex("models/objects/grenade2/tris.md2");
	grenade->owner = self;
	grenade->touch = Grenade_Touch;
	grenade->nextthink = level.time + timer;
	grenade->think = Grenade_Explode;
	grenade->dmg = damage;
	grenade->dmg_radius = damage_radius;
	grenade->classname = "hgrenade";
	if(held)
		grenade->spawnflags = 3;
	else
		grenade->spawnflags = 1;
	grenade->s.sound = gi.soundindex("weapons/hgrenc1b.wav");

	if(timer <= 0.0)
		Grenade_Explode(grenade);
	else {
		gi.sound(self, CHAN_WEAPON, gi.soundindex("weapons/hgrent1a.wav"), 1, ATTN_NORM, 0);
		gi.linkentity(grenade);
	}
}


/*
fire_rocket
*/
void rocket_touch(edict_t *ent, edict_t *other, cplane_t *plane, csurface_t *surf){
	vec3_t origin;
	int n;

	if(other == ent->owner)
		return;

	if(surf &&(surf->flags & SURF_SKY)){
		G_FreeEdict(ent);
		return;
	}

	if(ent->owner->client)
		PlayerNoise(ent->owner, ent->s.origin, PNOISE_IMPACT);

	// calculate position for the explosion entity
	VectorMA(ent->s.origin, -0.02, ent->velocity, origin);

	if(other->takedamage){
		T_Damage(other, ent, ent->owner, ent->velocity, ent->s.origin, plane->normal, ent->dmg, 0, 0, MOD_ROCKET);
	} else {
	// don't throw any debris in net games
		if(!deathmatch->value && !coop->value){
			if((surf) && !(surf->flags &(SURF_WARP | SURF_TRANS33 | SURF_TRANS66 | SURF_FLOWING))){
				n = rand() % 5;
				while(n--)
					ThrowDebris(ent, "models/objects/debris2/tris.md2", 2, ent->s.origin);
			}
		}
	}

	T_RadiusDamage(ent, ent->owner, ent->radius_dmg, other, ent->dmg_radius, MOD_R_SPLASH);

	gi.WriteByte(svc_temp_entity);
	if(ent->waterlevel)
		gi.WriteByte(TE_ROCKET_EXPLOSION_WATER);
	else
		gi.WriteByte(TE_ROCKET_EXPLOSION);
	gi.WritePosition(origin);
	gi.multicast(ent->s.origin, MULTICAST_PHS);

	G_FreeEdict(ent);
}

void fire_rocket(edict_t *self, vec3_t start, vec3_t dir, int damage, int speed, float damage_radius, int radius_damage){
	edict_t *rocket;

	rocket = G_Spawn();
	VectorCopy(start, rocket->s.origin);
	VectorCopy(dir, rocket->movedir);
	vectoangles(dir, rocket->s.angles);
	VectorScale(dir, speed, rocket->velocity);
	rocket->movetype = MOVETYPE_FLYMISSILE;
	rocket->clipmask = MASK_SHOT;
	rocket->solid = SOLID_BBOX;
	rocket->s.effects |= EF_ROCKET;
	VectorClear(rocket->mins);
	VectorClear(rocket->maxs);
	rocket->s.modelindex = gi.modelindex("models/objects/rocket/tris.md2");
	rocket->owner = self;
	rocket->touch = rocket_touch;
	rocket->nextthink = level.time + 8000 / speed;
	rocket->think = G_FreeEdict;
	rocket->dmg = damage;
	rocket->radius_dmg = radius_damage;
	rocket->dmg_radius = damage_radius;
	rocket->s.sound = gi.soundindex("weapons/rockfly.wav");
	rocket->classname = "rocket";
	rocket->s.renderfx = RF_NOSHADOW;

	if(self->client)
		check_dodge(self, rocket->s.origin, dir, speed);

	gi.linkentity(rocket);
}


/*
fire_rail
*/
void fire_rail(edict_t *self, vec3_t start, vec3_t aimdir, int damage, int kick){
	vec3_t from;
	vec3_t end;
	trace_t tr;
	edict_t *ignore;
	int mask;
	qboolean	water;

	VectorMA(start, 8192, aimdir, end);
	VectorCopy(start, from);
	ignore = self;
	water = false;
	mask = MASK_SHOT | CONTENTS_SLIME | CONTENTS_LAVA;
	while(ignore){
		tr = gi.trace(from, NULL, NULL, end, ignore, mask);

		if(tr.contents &(CONTENTS_SLIME | CONTENTS_LAVA)){
			mask &= ~(CONTENTS_SLIME | CONTENTS_LAVA);
			water = true;
		} else {
	//ZOID--added so rail goes through SOLID_BBOX entities(gibs, etc)
			if((tr.ent->svflags & SVF_MONSTER) ||(tr.ent->client) ||
					(tr.ent->solid == SOLID_BBOX))
				ignore = tr.ent;
			else
				ignore = NULL;

			if((tr.ent != self) &&(tr.ent->takedamage))
				T_Damage(tr.ent, self, self, aimdir, tr.endpos, tr.plane.normal, damage, kick, 0, MOD_RAILGUN);
		}

		VectorCopy(tr.endpos, from);
	}

	// send gun puff / flash
	gi.WriteByte(svc_temp_entity);
	gi.WriteByte(TE_RAILTRAIL);
	gi.WritePosition(start);
	gi.WritePosition(tr.endpos);
	gi.multicast(self->s.origin, MULTICAST_PHS);
	//	gi.multicast(start, MULTICAST_PHS);
	if(water){
		gi.WriteByte(svc_temp_entity);
		gi.WriteByte(TE_RAILTRAIL);
		gi.WritePosition(start);
		gi.WritePosition(tr.endpos);
		gi.multicast(tr.endpos, MULTICAST_PHS);
	}

	if(self->client)
		PlayerNoise(self, tr.endpos, PNOISE_IMPACT);
}


/*
fire_bfg
*/
void bfg_explode(edict_t *self){
	edict_t *ent;
	float points;
	vec3_t v;
	float dist;

	if(self->s.frame == 0){
	// the BFG effect
		ent = NULL;
		while((ent = findradius(ent, self->s.origin, self->dmg_radius)) != NULL){
			if(!ent->takedamage)
				continue;
			if(ent == self->owner)
				continue;
			if(!CanDamage(ent, self))
				continue;
			if(!CanDamage(ent, self->owner))
				continue;

			VectorAdd(ent->mins, ent->maxs, v);
			VectorMA(ent->s.origin, 0.5, v, v);
			VectorSubtract(self->s.origin, v, v);
			dist = VectorLength(v);
			points = self->radius_dmg *(1.0 - sqrt(dist / self->dmg_radius));
			if(ent == self->owner)
				points = points * 0.5;

			gi.WriteByte(svc_temp_entity);
			gi.WriteByte(TE_BFG_EXPLOSION);
			gi.WritePosition(ent->s.origin);
			gi.multicast(ent->s.origin, MULTICAST_PHS);
			T_Damage(ent, self, self->owner, self->velocity, ent->s.origin, vec3_origin,(int)points, 0, DAMAGE_ENERGY, MOD_BFG_EFFECT);
		}
	}

	self->nextthink = level.time + FRAMETIME;
	self->s.frame++;
	if(self->s.frame == 5)
		self->think = G_FreeEdict;
}

void bfg_touch(edict_t *self, edict_t *other, cplane_t *plane, csurface_t *surf){
	if(other == self->owner)
		return;

	if(surf &&(surf->flags & SURF_SKY)){
		G_FreeEdict(self);
		return;
	}

	if(self->owner->client)
		PlayerNoise(self->owner, self->s.origin, PNOISE_IMPACT);

	// core explosion - prevents firing it into the wall/floor
	if(other->takedamage)
		T_Damage(other, self, self->owner, self->velocity, self->s.origin, plane->normal, 200, 0, 0, MOD_BFG_BLAST);
	T_RadiusDamage(self, self->owner, 200, other, 100, MOD_BFG_BLAST);

	gi.sound(self, CHAN_VOICE, gi.soundindex("weapons/bfg__x1b.wav"), 1, ATTN_NORM, 0);
	self->solid = SOLID_NOT;
	self->touch = NULL;
	VectorMA(self->s.origin, -1 * FRAMETIME, self->velocity, self->s.origin);
	VectorClear(self->velocity);
	self->s.modelindex = gi.modelindex("sprites/s_bfg3.sp2");
	self->s.frame = 0;
	self->s.sound = 0;
	self->s.effects &= ~EF_ANIM_ALLFAST;
	self->think = bfg_explode;
	self->nextthink = level.time + FRAMETIME;
	self->enemy = other;

	gi.WriteByte(svc_temp_entity);
	gi.WriteByte(TE_BFG_BIGEXPLOSION);
	gi.WritePosition(self->s.origin);
	gi.multicast(self->s.origin, MULTICAST_PVS);
}


void bfg_think(edict_t *self){
	edict_t *ent;
	edict_t *ignore;
	vec3_t point;
	vec3_t dir;
	vec3_t start;
	vec3_t end;
	int dmg;
	trace_t tr;

	if(deathmatch->value)
		dmg = 5;
	else
		dmg = 10;

	ent = NULL;
	while((ent = findradius(ent, self->s.origin, 256)) != NULL){
		if(ent == self)
			continue;

		if(ent == self->owner)
			continue;

		if(!ent->takedamage)
			continue;

		if(!(ent->svflags & SVF_MONSTER) &&(!ent->client) &&(strcmp(ent->classname, "misc_explobox") != 0))
			continue;

		VectorMA(ent->absmin, 0.5, ent->size, point);

		VectorSubtract(point, self->s.origin, dir);
		VectorNormalize(dir);

		ignore = self;
		VectorCopy(self->s.origin, start);
		VectorMA(start, 2048, dir, 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) &&(tr.ent != self->owner))
				T_Damage(tr.ent, self, self->owner, dir, tr.endpos, vec3_origin, dmg, 1, DAMAGE_ENERGY, MOD_BFG_LASER);

	// if we hit something that's not a monster or player we're done
			if(!(tr.ent->svflags & SVF_MONSTER) &&(!tr.ent->client)){
				gi.WriteByte(svc_temp_entity);
				gi.WriteByte(TE_LASER_SPARKS);
				gi.WriteByte(4);
				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);
		}

		gi.WriteByte(svc_temp_entity);
		gi.WriteByte(TE_BFG_LASER);
		gi.WritePosition(self->s.origin);
		gi.WritePosition(tr.endpos);
		gi.multicast(self->s.origin, MULTICAST_PHS);
	}

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


void fire_bfg(edict_t *self, vec3_t start, vec3_t dir, int damage, int speed, float damage_radius){
	edict_t *bfg;

	bfg = G_Spawn();
	VectorCopy(start, bfg->s.origin);
	VectorCopy(dir, bfg->movedir);
	vectoangles(dir, bfg->s.angles);
	VectorScale(dir, speed, bfg->velocity);
	bfg->movetype = MOVETYPE_FLYMISSILE;
	bfg->clipmask = MASK_SHOT;
	bfg->solid = SOLID_BBOX;
	bfg->s.effects |= EF_BFG | EF_ANIM_ALLFAST;
	VectorClear(bfg->mins);
	VectorClear(bfg->maxs);
	bfg->s.modelindex = gi.modelindex("sprites/s_bfg1.sp2");
	bfg->owner = self;
	bfg->touch = bfg_touch;
	bfg->nextthink = level.time + 8000 / speed;
	bfg->think = G_FreeEdict;
	bfg->radius_dmg = damage;
	bfg->dmg_radius = damage_radius;
	bfg->classname = "bfg blast";
	bfg->s.sound = gi.soundindex("weapons/bfg__l1a.wav");

	bfg->think = bfg_think;
	bfg->nextthink = level.time + FRAMETIME;
	bfg->teammaster = bfg;
	bfg->teamchain = NULL;

	if(self->client)
		check_dodge(self, bfg->s.origin, dir, speed);

	gi.linkentity(bfg);
}