tbftss/src/battle/mine.c

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/*
Copyright (C) 2015-2016 Parallel Realities
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 "mine.h"
static void think(void);
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static void die(void);
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static void lookForFighters(void);
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static void doSplashDamage(void);
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static SDL_Texture *mineWarning = NULL;
static SDL_Texture *mineNormal = NULL;
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Entity *spawnMine(void)
{
Entity *mine = spawnEntity();
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if (!mineNormal || !mineWarning)
{
mineNormal = getTexture("gfx/entities/mine.png");
mineWarning = getTexture("gfx/entities/mineWarning.png");
}
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mine->type = ET_MINE;
mine->health = mine->maxHealth = 1;
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mine->speed = 1;
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mine->systemPower = SYSTEM_POWER;
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mine->texture = mineNormal;
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mine->action = think;
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mine->die = die;
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mine->flags = EF_TAKES_DAMAGE+EF_NO_TARGET;
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SDL_QueryTexture(mine->texture, NULL, NULL, &mine->w, &mine->h);
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return mine;
}
static void think(void)
{
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self->texture = mineNormal;
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self->angle += 0.1;
if (self->angle >= 360)
{
self->angle -= 360;
}
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self->dx *= 0.99;
self->dy *= 0.99;
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lookForFighters();
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if (self->systemPower < SYSTEM_POWER && battle.stats[STAT_TIME] % 8 < 4)
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{
playBattleSound(SND_MINE_WARNING, self->x, self->y);
self->texture = mineWarning;
}
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}
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static void lookForFighters(void)
{
Entity *e, **candidates;
int i;
candidates = getAllEntsWithin(self->x - (self->w / 2) - DAMAGE_RANGE, self->y - (self->h / 2) - DAMAGE_RANGE, self->w + DAMAGE_RANGE, self->h + DAMAGE_RANGE, self);
for (i = 0, e = candidates[i] ; e != NULL ; e = candidates[++i])
{
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if (e->side != self->side && e->health > 0 && e->type == ET_FIGHTER && getDistance(self->x, self->y, e->x, e->y) <= TRIGGER_RANGE)
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{
self->systemPower--;
if (self->systemPower <= 0)
{
self->health = 0;
}
return;
}
}
self->systemPower = SYSTEM_POWER;
}
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static void die(void)
{
addMineExplosion();
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doSplashDamage();
playBattleSound(SND_EXPLOSION_5, self->x, self->y);
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self->alive = ALIVE_DEAD;
}
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static void doSplashDamage(void)
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{
Entity *e, **candidates;
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int i, dist;
float damage, percent;
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candidates = getAllEntsWithin(self->x - (self->w / 2), self->y - (self->h / 2), self->w, self->h, self);
for (i = 0, e = candidates[i] ; e != NULL ; e = candidates[++i])
{
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if (e->health > 0 && (e->type == ET_FIGHTER || e->type == ET_MINE) && !(e->flags & EF_IMMORTAL))
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{
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dist = getDistance(self->x, self->y, e->x, e->y);
if (dist <= DAMAGE_RANGE)
{
percent = dist;
percent /= DAMAGE_RANGE;
percent = 1 - percent;
damage = 100;
damage *= percent;
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if (e->type == ET_FIGHTER)
{
damageFighter(e, damage, 0);
}
else if (e->type == ET_MINE)
{
e->dx = e->x - self->x;
e->dy = e->y - self->y;
e->dx *= 0.01;
e->dy *= 0.01;
}
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}
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}
}
}