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Copy pathExplosionBState.cpp
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327 lines (301 loc) · 9 KB
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/*
* Copyright 2010-2016 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom 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 3 of the License, or
* (at your option) any later version.
*
* OpenXcom 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 OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ExplosionBState.h"
#include "BattlescapeState.h"
#include "Explosion.h"
#include "TileEngine.h"
#include "Map.h"
#include "Camera.h"
#include "../Savegame/BattleUnit.h"
#include "../Savegame/BattleItem.h"
#include "../Savegame/SavedBattleGame.h"
#include "../Savegame/Tile.h"
#include "../Mod/Mod.h"
#include "../Engine/Sound.h"
#include "../Mod/RuleItem.h"
#include "../Mod/Armor.h"
#include "../Engine/RNG.h"
namespace OpenXcom
{
/**
* Sets up an ExplosionBState.
* @param parent Pointer to the BattleScape.
* @param center Center position in voxelspace.
* @param item Item involved in the explosion (eg grenade).
* @param unit Unit involved in the explosion (eg unit throwing the grenade).
* @param tile Tile the explosion is on.
* @param lowerWeapon Whether the unit causing this explosion should now lower their weapon.
*/
ExplosionBState::ExplosionBState(BattlescapeGame *parent, Position center, BattleItem *item, BattleUnit *unit, Tile *tile, bool lowerWeapon, bool cosmetic) : BattleState(parent), _unit(unit), _center(center), _item(item), _tile(tile), _power(0), _areaOfEffect(false), _lowerWeapon(lowerWeapon), _cosmetic(cosmetic)
{
}
/**
* Deletes the ExplosionBState.
*/
ExplosionBState::~ExplosionBState()
{
}
/**
* Initializes the explosion.
* The animation and sound starts here.
* If the animation is finished, the actual effect takes place.
*/
void ExplosionBState::init()
{
if (_item)
{
_power = _item->getRules()->getPower();
// this usually only applies to melee, but as a concession for modders i'll leave it here in case they wanna make bows or something.
if (_item->getRules()->isStrengthApplied() && _unit)
{
_power += _unit->getBaseStats()->strength;
}
_areaOfEffect = _item->getRules()->getBattleType() != BT_MELEE &&
_item->getRules()->getExplosionRadius() != 0 &&
!_cosmetic;
}
else if (_tile)
{
_power = _tile->getExplosive();
_areaOfEffect = true;
}
else if (_unit && (_unit->getSpecialAbility() == SPECAB_EXPLODEONDEATH || _unit->getSpecialAbility() == SPECAB_BURN_AND_EXPLODE))
{
_power = _parent->getMod()->getItem(_unit->getArmor()->getCorpseGeoscape(), true)->getPower();
_areaOfEffect = true;
}
else
{
_power = 120;
_areaOfEffect = true;
}
Tile *t = _parent->getSave()->getTile(Position(_center.x/16, _center.y/16, _center.z/24));
if (_areaOfEffect)
{
if (_power)
{
int frame = Mod::EXPLOSION_OFFSET;
if (_item)
{
frame = _item->getRules()->getHitAnimation();
}
if (_parent->getDepth() > 0)
{
frame -= Explosion::EXPLODE_FRAMES;
}
int frameDelay = 0;
int counter = std::max(1, (_power/5) / 5);
_parent->getMap()->setBlastFlash(true);
int lowerLimit = std::max(1, _power/5);
for (int i = 0; i < lowerLimit; i++)
{
int X = RNG::generate(-_power/2,_power/2);
int Y = RNG::generate(-_power/2,_power/2);
Position p = _center;
p.x += X; p.y += Y;
Explosion *explosion = new Explosion(p, frame, frameDelay, true);
// add the explosion on the map
_parent->getMap()->getExplosions()->push_back(explosion);
if (i > 0 && i % counter == 0)
{
frameDelay++;
}
}
_parent->setStateInterval(BattlescapeState::DEFAULT_ANIM_SPEED/2);
// explosion sound
if (_power <= 80)
_parent->getMod()->getSoundByDepth(_parent->getDepth(), Mod::SMALL_EXPLOSION)->play();
else
_parent->getMod()->getSoundByDepth(_parent->getDepth(), Mod::LARGE_EXPLOSION)->play();
_parent->getMap()->getCamera()->centerOnPosition(t->getPosition(), false);
}
else
{
_parent->popState();
}
}
else
// create a bullet hit
{
_parent->setStateInterval(std::max(1, ((BattlescapeState::DEFAULT_ANIM_SPEED/2) - (10 * _item->getRules()->getExplosionSpeed()))));
int anim = _item->getRules()->getHitAnimation();
int sound = _item->getRules()->getHitSound();
if (_cosmetic) // Play melee animation on hitting and psiing
{
anim = _item->getRules()->getMeleeAnimation();
}
if (anim != -1)
{
Explosion *explosion = new Explosion(_center, anim, 0, false, _cosmetic);
_parent->getMap()->getExplosions()->push_back(explosion);
}
_parent->getMap()->getCamera()->setViewLevel(_center.z / 24);
BattleUnit *target = t->getUnit();
if (_cosmetic && _parent->getSave()->getSide() == FACTION_HOSTILE && target && target->getFaction() == FACTION_PLAYER)
{
_parent->getMap()->getCamera()->centerOnPosition(t->getPosition(), false);
}
if (sound != -1 && !_cosmetic)
{
// bullet hit sound
_parent->getMod()->getSoundByDepth(_parent->getDepth(), sound)->play(-1, _parent->getMap()->getSoundAngle(_center / Position(16,16,24)));
}
}
}
/**
* Animates explosion sprites. If their animation is finished remove them from the list.
* If the list is empty, this state is finished and the actual calculations take place.
*/
void ExplosionBState::think()
{
if (!_parent->getMap()->getBlastFlash())
{
if (_parent->getMap()->getExplosions()->empty())
explode();
for (std::list<Explosion*>::iterator i = _parent->getMap()->getExplosions()->begin(); i != _parent->getMap()->getExplosions()->end();)
{
if (!(*i)->animate())
{
delete (*i);
i = _parent->getMap()->getExplosions()->erase(i);
if (_parent->getMap()->getExplosions()->empty())
{
explode();
return;
}
}
else
{
++i;
}
}
}
}
/**
* Explosions cannot be cancelled.
*/
void ExplosionBState::cancel()
{
}
/**
* Calculates the effects of the explosion.
*/
void ExplosionBState::explode()
{
bool terrainExplosion = false;
SavedBattleGame *save = _parent->getSave();
// after the animation is done, the real explosion/hit takes place
if (_item)
{
if (!_unit && _item->getPreviousOwner())
{
_unit = _item->getPreviousOwner();
}
BattleUnit *victim = 0;
if (_areaOfEffect)
{
save->getTileEngine()->explode(_center, _power, _item->getRules()->getDamageType(), _item->getRules()->getExplosionRadius(), _unit);
}
else if (!_cosmetic)
{
ItemDamageType type = _item->getRules()->getDamageType();
victim = save->getTileEngine()->hit(_center, _power, type, _unit);
}
// check if this unit turns others into zombies
if (!_item->getRules()->getZombieUnit().empty()
&& victim
&& victim->getArmor()->getSize() == 1
&& (victim->getGeoscapeSoldier() || victim->getUnitRules()->getRace() == "STR_CIVILIAN")
&& victim->getSpawnUnit().empty())
{
// converts the victim to a zombie on death
victim->setRespawn(true);
victim->setSpawnUnit(_item->getRules()->getZombieUnit());
}
}
if (_tile)
{
ItemDamageType DT;
switch (_tile->getExplosiveType())
{
case 0:
DT = DT_HE;
break;
case 5:
DT = DT_IN;
break;
case 6:
DT = DT_STUN;
break;
default:
DT = DT_SMOKE;
break;
}
if (DT != DT_HE)
{
_tile->setExplosive(0,0,true);
}
save->getTileEngine()->explode(_center, _power, DT, _power/10);
terrainExplosion = true;
}
if (!_tile && !_item)
{
int radius = 6;
// explosion not caused by terrain or an item, must be by a unit (cyberdisc)
if (_unit && (_unit->getSpecialAbility() == SPECAB_EXPLODEONDEATH || _unit->getSpecialAbility() == SPECAB_BURN_AND_EXPLODE))
{
radius = _parent->getMod()->getItem(_unit->getArmor()->getCorpseGeoscape(), true)->getExplosionRadius();
}
save->getTileEngine()->explode(_center, _power, DT_HE, radius);
terrainExplosion = true;
}
if (!_cosmetic)
{
// now check for new casualties
_parent->checkForCasualties(_item, _unit, false, terrainExplosion);
}
// if this explosion was caused by a unit shooting, now it's the time to put the gun down
if (_unit && !_unit->isOut() && _lowerWeapon)
{
_unit->aim(false);
_unit->setCache(0);
}
_parent->getMap()->cacheUnits();
_parent->popState();
// check for terrain explosions
Tile *t = save->getTileEngine()->checkForTerrainExplosions();
if (t)
{
Position p = Position(t->getPosition().x * 16, t->getPosition().y * 16, t->getPosition().z * 24);
p += Position(8,8,0);
_parent->statePushFront(new ExplosionBState(_parent, p, 0, _unit, t));
}
if (_item && (_item->getRules()->getBattleType() == BT_GRENADE || _item->getRules()->getBattleType() == BT_PROXIMITYGRENADE))
{
for (std::vector<BattleItem*>::iterator j = _parent->getSave()->getItems()->begin(); j != _parent->getSave()->getItems()->end(); ++j)
{
if (_item->getId() == (*j)->getId())
{
_parent->getSave()->removeItem(_item);
break;
}
}
}
}
}