Method tryReactionSnap

src/Battlescape/TileEngine.cpp:937–988

* Attempts to perform a reaction snap shot. * @param unit The unit to check sight from. * @param target The unit to check sight TO. * @return True if the action should (theoretically) succeed. */

 * @return True if the action should (theoretically) succeed.
 */
bool TileEngine::tryReactionSnap(BattleUnit *unit, BattleUnit *target)
{
	BattleAction action;
	action.cameraPosition = _save->getBattleState()->getMap()->getCamera()->getMapOffset();
	action.actor = unit;
	action.weapon = unit->getMainHandWeapon();
	if (!action.weapon)
	{
		return false;
	}
	// reaction fire is ALWAYS snap shot.
	action.type = BA_SNAPSHOT;
	// unless we're a melee unit.
	if (action.weapon->getRules()->getBattleType() == BT_MELEE)
	{
		action.type = BA_HIT;
	}
	action.target = target->getPosition();
	action.TU = unit->getActionTUs(action.type, action.weapon);

	if (action.weapon->getAmmoItem() && action.weapon->getAmmoItem()->getAmmoQuantity() && unit->getTimeUnits() >= action.TU)
	{
		action.targeting = true;

		// hostile units will go into an "aggro" state when they react.
		if (unit->getFaction() == FACTION_HOSTILE)
		{
			AlienBAIState *aggro = dynamic_cast<AlienBAIState*>(unit->getCurrentAIState());
			if (aggro == 0)
			{
				// should not happen, but just in case...
				aggro = new AlienBAIState(_save, unit, 0);
				unit->setAIState(aggro);
			}

			if (action.weapon->getAmmoItem()->getRules()->getExplosionRadius() &&
				aggro->explosiveEfficacy(action.target, unit, action.weapon->getAmmoItem()->getRules()->getExplosionRadius(), -1) == false)
			{
				action.targeting = false;
			}
		}

		if (action.targeting && unit->spendTimeUnits(action.TU))
		{
			action.TU = 0;
			_save->getBattleGame()->statePushBack(new UnitTurnBState(_save->getBattleGame(), action));
			_save->getBattleGame()->statePushBack(new ProjectileFlyBState(_save->getBattleGame(), action));
			return true;
		}
	}
	return false;
}

/**
 * Handles bullet/weapon hits.