g_trigger.c

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/*
All original material Copyright (C) 2002-2010 UFO: Alien Invasion.

Original file from Quake 2 v3.21: quake2-2.31/game/g_spawn.c
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.

*/


#include "g_local.h"

edict_t* G_TriggerSpawn (edict_t *owner)
{
    edict_t* trigger;
    vec3_t mins, maxs;

    trigger = G_Spawn();
    trigger->classname = "trigger";
    trigger->type = ET_TRIGGER;
    /* e.g. link the door into the trigger */
    trigger->owner = owner;

    VectorCopy(owner->absmin, mins);
    VectorCopy(owner->absmax, maxs);

    /* expand the trigger box */
    mins[0] -= (UNIT_SIZE / 2);
    mins[1] -= (UNIT_SIZE / 2);
    maxs[0] += (UNIT_SIZE / 2);
    maxs[1] += (UNIT_SIZE / 2);

    VectorCopy(mins, trigger->mins);
    VectorCopy(maxs, trigger->maxs);

    trigger->solid = SOLID_TRIGGER;

    /* link into the world */
    gi.LinkEdict(trigger);

    return trigger;
}

static qboolean Touch_HurtTrigger (edict_t *self, edict_t *activator)
{
    /* these actors should really not be able to trigger this - they don't move anymore */
    assert(!G_IsDead(activator));
    assert(!G_IsStunned(activator));

    if (self->spawnflags & 2) {
        activator->STUN += self->dmg;
        if (activator->HP <= activator->STUN)
            G_SetStunned(activator);
    } else if (self->spawnflags & 4) {
    } else {
        G_TakeDamage(activator, self->dmg);
        if (activator->HP == 0)
            G_SetDead(activator);
    }

    return qtrue;
}

void SP_trigger_hurt (edict_t *ent)
{
    ent->classname = "trigger_hurt";
    ent->type = ET_TRIGGER_HURT;

    if (!ent->dmg)
        ent->dmg = 5;

    ent->solid = SOLID_TRIGGER;
    gi.SetModel(ent, ent->model);

    ent->touch = Touch_HurtTrigger;
    ent->child = NULL;

    gi.LinkEdict(ent);
}

static qboolean Touch_TouchTrigger (edict_t *self, edict_t *activator)
{
    /* these actors should really not be able to trigger this - they don't move anymore */
    assert(!G_IsDead(activator));
    assert(!G_IsDead(activator));

    self->owner = G_FindTargetEntity(self->target);
    if (!self->owner) {
        gi.DPrintf("Target '%s' wasn't found for %s\n", self->target, self->classname);
        G_FreeEdict(self);
        return qfalse;
    }

    if (!self->owner->use) {
        gi.DPrintf("Owner of %s doesn't have a use function\n", self->classname);
        G_FreeEdict(self);
        return qfalse;
    }

    self->owner->use(self->owner, activator);

    return qfalse;
}

void SP_trigger_touch (edict_t *ent)
{
    ent->classname = "trigger_touch";
    ent->type = ET_TRIGGER_TOUCH;

    if (!ent->target) {
        gi.DPrintf("No target given for %s\n", ent->classname);
        G_FreeEdict(ent);
        return;
    }

    ent->solid = SOLID_TRIGGER;
    gi.SetModel(ent, ent->model);

    ent->touch = Touch_TouchTrigger;
    ent->child = NULL;

    gi.LinkEdict(ent);
}

static qboolean Touch_RescueTrigger (edict_t *self, edict_t *activator)
{
    /* these actors should really not be able to trigger this - they don't move anymore */
    assert(!G_IsDead(activator));
    assert(!G_IsDead(activator));

    if (self->team == activator->team)
        G_ActorSetInRescueZone(activator, qtrue);

    return qfalse;
}

static void Reset_RescueTrigger (edict_t *self, edict_t *activator)
{
    if (self->team == activator->team)
        G_ActorSetInRescueZone(activator, qfalse);
}

void SP_trigger_rescue (edict_t *ent)
{
    ent->classname = "trigger_rescue";
    ent->type = ET_TRIGGER_RESCUE;

    ent->solid = SOLID_TRIGGER;
    gi.SetModel(ent, ent->model);

    ent->touch = Touch_RescueTrigger;
    ent->reset = Reset_RescueTrigger;
    ent->child = NULL;

    gi.LinkEdict(ent);
}