Method openDoor

src/Savegame/Tile.cpp:319–346

* Open a door on this tile. * @param part * @param unit * @param reserve * @return a value: 0(normal door), 1(ufo door) or -1 if no door opened or 3 if ufo door(=animated) is still opening 4 if not enough TUs */

 * @return a value: 0(normal door), 1(ufo door) or -1 if no door opened or 3 if ufo door(=animated) is still opening 4 if not enough TUs
 */
int Tile::openDoor(int part, BattleUnit *unit, BattleActionType reserve)
{
	if (!_objects[part]) return -1;

	if (_objects[part]->isDoor())
	{
		if (unit && unit->getTimeUnits() < _objects[part]->getTUCost(unit->getArmor()->getMovementType()) + unit->getActionTUs(reserve, unit->getMainHandWeapon(false)))
			return 4;
		if (_unit && _unit != unit && _unit->getPosition() != getPosition())
			return -1;
		setMapData(_objects[part]->getDataset()->getObjects()->at(_objects[part]->getAltMCD()), _objects[part]->getAltMCD(), _mapDataSetID[part],
				   _objects[part]->getDataset()->getObjects()->at(_objects[part]->getAltMCD())->getObjectType());
		setMapData(0, -1, -1, part);
		return 0;
	}
	if (_objects[part]->isUFODoor() && _currentFrame[part] == 0) // ufo door part 0 - door is closed
	{
		if (unit &&	unit->getTimeUnits() < _objects[part]->getTUCost(unit->getArmor()->getMovementType()) + unit->getActionTUs(reserve, unit->getMainHandWeapon(false)))
			return 4;
		_currentFrame[part] = 1; // start opening door
		return 1;
	}
	if (_objects[part]->isUFODoor() && _currentFrame[part] != 7) // ufo door != part 7 - door is still opening
	{
		return 3;
	}
	return -1;
}

int Tile::closeUfoDoor()
{