Method determineAlienMissions

src/Geoscape/GeoscapeState.cpp:2155–2198

* Determine the alien missions to start this month. * In the vanilla game each month a terror mission and one other are started in * random regions. */

 * random regions.
 */
void GeoscapeState::determineAlienMissions(bool atGameStart)
{
	if (!atGameStart)
	{
		//
		// One randomly selected mission.
		//
		AlienStrategy &strategy = _game->getSavedGame()->getAlienStrategy();
		const std::string &targetRegion = strategy.chooseRandomRegion(_game->getRuleset());
		const std::string &targetMission = strategy.chooseRandomMission(targetRegion);
		// Choose race for this mission.
		const RuleAlienMission &missionRules = *_game->getRuleset()->getAlienMission(targetMission);
		const std::string &missionRace = missionRules.generateRace(_game->getSavedGame()->getMonthsPassed());
		AlienMission *otherMission = new AlienMission(missionRules);
		otherMission->setId(_game->getSavedGame()->getId("ALIEN_MISSIONS"));
		otherMission->setRegion(targetRegion, *_game->getRuleset());
		otherMission->setRace(missionRace);
		otherMission->start();
		_game->getSavedGame()->getAlienMissions().push_back(otherMission);
		// Make sure this combination never comes up again.
		strategy.removeMission(targetRegion, targetMission);
	}
	else
	{
		//
		// Sectoid Research at base's region.
		//
		AlienStrategy &strategy = _game->getSavedGame()->getAlienStrategy();
		std::string targetRegion =
		_game->getSavedGame()->locateRegion(*_game->getSavedGame()->getBases()->front())->getRules()->getType();
		// Choose race for this mission.
		std::string research = _game->getRuleset()->getAlienMissionList().front();
		const RuleAlienMission &missionRules = *_game->getRuleset()->getAlienMission(research);
		AlienMission *otherMission = new AlienMission(missionRules);
		otherMission->setId(_game->getSavedGame()->getId("ALIEN_MISSIONS"));
		otherMission->setRegion(targetRegion, *_game->getRuleset());
		std::string sectoid = missionRules.getTopRace(_game->getSavedGame()->getMonthsPassed());
		otherMission->setRace(sectoid);
		otherMission->start(150);
		_game->getSavedGame()->getAlienMissions().push_back(otherMission);
		// Make sure this combination never comes up again.
		strategy.removeMission(targetRegion, research);
	}
}

void GeoscapeState::setupTerrorMission()
{