Method think

src/Battlescape/UnitWalkBState.cpp:84–457

* Runs state functionality every cycle. */

 * Runs state functionality every cycle.
 */
void UnitWalkBState::think()
{
	bool unitSpotted = false;
	bool onScreen = (_unit->getVisible() && _parent->getMap()->getCamera()->isOnScreen(_unit->getPosition(), true));
	if (_unit->isKneeled())
	{
		if (_parent->kneel(_unit))
		{
			_unit->setCache(0);
			_terrain->calculateFOV(_unit);
			_parent->getMap()->cacheUnit(_unit);
			return;
		}
		else
		{
			_action.result = "STR_NOT_ENOUGH_TIME_UNITS";
			_pf->abortPath();
			_parent->popState();
			return;
		}
	}
	Tile *tileBelow = _parent->getSave()->getTile(_unit->getPosition() + Position(0,0,-1));

	if (_unit->isOut())
	{
		_pf->abortPath();
		_parent->popState();
		return;
	}

	if (_unit->getStatus() == STATUS_WALKING || _unit->getStatus() == STATUS_FLYING)
	{
		if ((_parent->getSave()->getTile(_unit->getDestination())->getUnit() == 0) || // next tile must be not occupied
			(_parent->getSave()->getTile(_unit->getDestination())->getUnit() == _unit))
		{
			playMovementSound();
			_unit->keepWalking(tileBelow, onScreen); // advances the phase
		}
		else if (!_falling)
		{
			_unit->lookAt(_unit->getDestination(), (_unit->getTurretType() != -1));	// turn to undiscovered unit
			_pf->abortPath();
		}

		// unit moved from one tile to the other, update the tiles
		if (_unit->getPosition() != _unit->getLastPosition())
		{
			int size = _unit->getArmor()->getSize() - 1;
			bool largeCheck = true;
			for (int x = size; x >= 0; x--)
			{
				for (int y = size; y >= 0; y--)
				{
					Tile *otherTileBelow = _parent->getSave()->getTile(_unit->getPosition() + Position(x,y,-1));
					if (!_parent->getSave()->getTile(_unit->getPosition() + Position(x,y,0))->hasNoFloor(otherTileBelow) || _unit->getArmor()->getMovementType() == MT_FLY)
						largeCheck = false;
					_parent->getSave()->getTile(_unit->getLastPosition() + Position(x,y,0))->setUnit(0);
				}