Method explode

src/Battlescape/ExplosionBState.cpp:205–318

* Calculates the effects of the explosion. */

 * Calculates the effects of the explosion.
 */
void ExplosionBState::explode()
{
	bool terrainExplosion = false;
	SavedBattleGame *save = _parent->getSave();
	// last minute adjustment: determine if we actually 
	if (_parent->getCurrentAction()->type == BA_HIT || _parent->getCurrentAction()->type == BA_STUN)
	{
		save->getBattleGame()->getCurrentAction()->type = BA_NONE;
		BattleUnit *targetUnit = save->getTile(_center / Position(16, 16, 24))->getUnit();
		if (_unit && !_unit->isOut())
		{
			_unit->aim(false);
			_unit->setCache(0);
		}
		if (!RNG::percent(_unit->getFiringAccuracy(BA_HIT, _item)))
		{
			_parent->getMap()->cacheUnits();
			_parent->popState();
			return;
		}
		else if (targetUnit && targetUnit->getOriginalFaction() == FACTION_HOSTILE &&
				_unit->getOriginalFaction() == FACTION_PLAYER)
		{
			_unit->addMeleeExp();
		}
		if (_item->getRules()->getMeleeHitSound() != -1)
		{
			_parent->getResourcePack()->getSound("BATTLE.CAT", _item->getRules()->getMeleeHitSound())->play();
		}
	}
	// after the animation is done, the real explosion/hit takes place
	if (_item)
	{
		if (!_unit && _item->getPreviousOwner())
		{
			_unit = _item->getPreviousOwner();
		}

		if (_areaOfEffect)
		{
			save->getTileEngine()->explode(_center, _power, _item->getRules()->getDamageType(), _item->getRules()->getExplosionRadius(), _unit);
		}
		else
		{
			ItemDamageType type = _item->getRules()->getDamageType();
			if (_pistolWhip)
			{
				type = DT_STUN;
			}
			BattleUnit *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->getSpawnUnit().empty()
				&& victim->getOriginalFaction() != FACTION_HOSTILE)
			{
				// converts the victim to a zombie on death