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/*
* Copyright 2010-2015 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenXcom is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#define _USE_MATH_DEFINES
#include "AlienMission.h"
#include "AlienBase.h"
#include "Base.h"
#include "../fmath.h"
#include "../Engine/Exception.h"
#include "../Engine/Game.h"
#include "../Engine/Logger.h"
#include "../Engine/RNG.h"
#include "../Geoscape/Globe.h"
#include "../Ruleset/RuleAlienMission.h"
#include "../Ruleset/RuleRegion.h"
#include "../Ruleset/RuleCountry.h"
#include "../Ruleset/Ruleset.h"
#include "../Ruleset/RuleUfo.h"
#include "../Ruleset/UfoTrajectory.h"
#include "../Ruleset/RuleGlobe.h"
#include "../Ruleset/Texture.h"
#include "SavedGame.h"
#include "MissionSite.h"
#include "Ufo.h"
#include "Craft.h"
#include "Region.h"
#include "Country.h"
#include "Waypoint.h"
#include <assert.h>
#include <algorithm>
#include <functional>
#include <math.h>
#include "../Ruleset/AlienDeployment.h"
namespace OpenXcom
{
AlienMission::AlienMission(const RuleAlienMission &rule) : _rule(rule), _nextWave(0), _nextUfoCounter(0), _spawnCountdown(0), _liveUfos(0), _uniqueID(0), _base(0)
{
// Empty by design.
}
AlienMission::~AlienMission()
{
// Empty by design.
}
class matchById: public std::unary_function<const AlienBase *, bool>
{
public:
/// Remember ID.
matchById(int id) : _id(id) { /* Empty by design. */ }
/// Match with stored ID.
bool operator()(const AlienBase *ab) const { return ab->getId() == _id; }
private:
int _id;
};
/**
* Loads the alien mission from a YAML file.
* @param node The YAML node containing the data.
* @param game The game data, required to locate the alien base.
*/
void AlienMission::load(const YAML::Node& node, SavedGame &game)
{
_region = node["region"].as<std::string>(_region);
_race = node["race"].as<std::string>(_race);
_nextWave = node["nextWave"].as<size_t>(_nextWave);
_nextUfoCounter = node["nextUfoCounter"].as<size_t>(_nextUfoCounter);
_spawnCountdown = node["spawnCountdown"].as<size_t>(_spawnCountdown);
_liveUfos = node["liveUfos"].as<size_t>(_liveUfos);
_uniqueID = node["uniqueID"].as<int>(_uniqueID);
if (const YAML::Node &base = node["alienBase"])
{
int id = base.as<int>();
std::vector<AlienBase*>::const_iterator found = std::find_if (game.getAlienBases()->begin(), game.getAlienBases()->end(), matchById(id));
if (found == game.getAlienBases()->end())
{
throw Exception("Corrupted save: Invalid base for mission.");
}
_base = *found;
}
}
/**
* Saves the alien mission to a YAML file.
* @return YAML node.
*/
YAML::Node AlienMission::save() const
{
YAML::Node node;
node["type"] = _rule.getType();
node["region"] = _region;
node["race"] = _race;
node["nextWave"] = _nextWave;
node["nextUfoCounter"] = _nextUfoCounter;
node["spawnCountdown"] = _spawnCountdown;
node["liveUfos"] = _liveUfos;
node["uniqueID"] = _uniqueID;
if (_base)
{
node["alienBase"] = _base->getId();
}
return node;
}
/**
* Check if a mission is over and can be safely removed from the game.
* A mission is over if it will spawn no more UFOs and it has no UFOs still in
* the game.
* @return If the mission can be safely removed from game.
*/
bool AlienMission::isOver() const
{
if (_rule.getObjective() == OBJECTIVE_INFILTRATION)
{
//Infiltrations continue for ever.
return false;
}
if (_nextWave == _rule.getWaveCount() && !_liveUfos)
{
return true;
}
return false;
}
/**
* Find an XCOM base in this region that is marked for retaliation.
*/
class FindMarkedXCOMBase: public std::unary_function<const Base *, bool>
{
public:
FindMarkedXCOMBase(const RuleRegion ®ion) : _region(region) { /* Empty by design. */ }
bool operator()(const Base *base) const { return (_region.insideRegion(base->getLongitude(), base->getLatitude()) && base->getRetaliationTarget()); }
private:
const RuleRegion &_region;
};
void AlienMission::think(Game &engine, const Globe &globe)
{
const Ruleset &ruleset = *engine.getRuleset();
SavedGame &game = *engine.getSavedGame();
if (_nextWave >= _rule.getWaveCount())
return;
if (_spawnCountdown > 30)
{
_spawnCountdown -= 30;
return;
}
const MissionWave &wave = _rule.getWave(_nextWave);
const UfoTrajectory &trajectory = *ruleset.getUfoTrajectory(wave.trajectory);
Ufo *ufo = spawnUfo(game, ruleset, globe, wave, trajectory);
if (ufo)
{
//Some missions may not spawn a UFO!
game.getUfos()->push_back(ufo);
}
++_nextUfoCounter;
if (_nextUfoCounter == wave.ufoCount)
{
_nextUfoCounter = 0;
++_nextWave;
}
if (_rule.getObjective() == OBJECTIVE_INFILTRATION && _nextWave == _rule.getWaveCount())
{
for (std::vector<Country*>::iterator c = game.getCountries()->begin(); c != game.getCountries()->end(); ++c)
{
if (!(*c)->getPact() && !(*c)->getNewPact() && ruleset.getRegion(_region)->insideRegion((*c)->getRules()->getLabelLongitude(), (*c)->getRules()->getLabelLatitude()))
{
(*c)->setNewPact();
spawnAlienBase(globe, engine, _rule.getSpawnZone());
break;
}
}
// Infiltrations loop for ever.
_nextWave = 0;
}
if (_rule.getObjective() == OBJECTIVE_BASE && _nextWave == _rule.getWaveCount())
{
spawnAlienBase(globe, engine, _rule.getSpawnZone());
}
if (_nextWave != _rule.getWaveCount())
{
size_t spawnTimer = _rule.getWave(_nextWave).spawnTimer / 30;
_spawnCountdown = (spawnTimer/2 + RNG::generate(0, spawnTimer)) * 30;
}
}
/**
* This function will spawn a UFO according the mission rules.
* Some code is duplicated between cases, that's ok for now. It's on different
* code paths and the function is MUCH easier to read written this way.
* @param game The saved game information.
* @param ruleset The ruleset.
* @param globe The globe, for land checks.
* @param wave The wave for the desired UFO.
* @param trajectory The rule for the desired trajectory.
* @return Pointer to the spawned UFO. If the mission does not desire to spawn a UFO, 0 is returned.
*/
Ufo *AlienMission::spawnUfo(const SavedGame &game, const Ruleset &ruleset, const Globe &globe, const MissionWave &wave, const UfoTrajectory &trajectory)
{
RuleUfo &ufoRule = *ruleset.getUfo(wave.ufoType);
if (_rule.getObjective() == OBJECTIVE_RETALIATION)
{
const RuleRegion ®ionRules = *ruleset.getRegion(_region);
std::vector<Base *>::const_iterator found =
std::find_if (game.getBases()->begin(), game.getBases()->end(),
FindMarkedXCOMBase(regionRules));
if (found != game.getBases()->end())
{
// Spawn a battleship straight for the XCOM base.
const RuleUfo &battleshipRule = *ruleset.getUfo(_rule.getSpawnUfo());
const UfoTrajectory &assaultTrajectory = *ruleset.getUfoTrajectory(UfoTrajectory::RETALIATION_ASSAULT_RUN);
Ufo *ufo = new Ufo(&battleshipRule);
ufo->setMissionInfo(this, &assaultTrajectory);
std::pair<double, double> pos;
if (trajectory.getAltitude(0) == "STR_GROUND")
{
pos = getLandPoint(globe, regionRules, trajectory.getZone(0));
}
else
{
pos = regionRules.getRandomPoint(trajectory.getZone(0));
}
ufo->setAltitude(assaultTrajectory.getAltitude(0));
ufo->setSpeed(assaultTrajectory.getSpeedPercentage(0) * battleshipRule.getMaxSpeed());
ufo->setLongitude(pos.first);
ufo->setLatitude(pos.second);
Waypoint *wp = new Waypoint();
wp->setLongitude((*found)->getLongitude());
wp->setLatitude((*found)->getLatitude());
ufo->setDestination(wp);
return ufo;
}
}
else if (_rule.getObjective() == OBJECTIVE_SUPPLY)
{
if (wave.objective && !_base)
{
// No base to supply!
return 0;
}
// Our destination is always an alien base.
Ufo *ufo = new Ufo(&ufoRule);
ufo->setMissionInfo(this, &trajectory);
const RuleRegion ®ionRules = *ruleset.getRegion(_region);
std::pair<double, double> pos;
if (trajectory.getAltitude(0) == "STR_GROUND")
{
pos = getLandPoint(globe, regionRules, trajectory.getZone(0));
}
else
{
pos = regionRules.getRandomPoint(trajectory.getZone(0));
}
ufo->setAltitude(trajectory.getAltitude(0));
ufo->setSpeed(trajectory.getSpeedPercentage(0) * ufoRule.getMaxSpeed());
ufo->setLongitude(pos.first);
ufo->setLatitude(pos.second);
Waypoint *wp = new Waypoint();
if (trajectory.getAltitude(1) == "STR_GROUND")
{
if (wave.objective)
{
// Supply ships on supply missions land on bases, ignore trajectory zone.
pos.first = _base->getLongitude();
pos.second = _base->getLatitude();
}
else
{
// Other ships can land where they want.
pos = getLandPoint(globe, regionRules, trajectory.getZone(1));
}
}
else
{
pos = regionRules.getRandomPoint(trajectory.getZone(1));
}
wp->setLongitude(pos.first);
wp->setLatitude(pos.second);
ufo->setDestination(wp);
return ufo;
}
// Spawn according to sequence.
Ufo *ufo = new Ufo(&ufoRule);
ufo->setMissionInfo(this, &trajectory);
const RuleRegion ®ionRules = *ruleset.getRegion(_region);
std::pair<double, double> pos = getWaypoint(trajectory, 0, globe, regionRules);
ufo->setAltitude(trajectory.getAltitude(0));
if (trajectory.getAltitude(0) == "STR_GROUND")
{
ufo->setSecondsRemaining(trajectory.groundTimer()*5);
}
ufo->setSpeed(trajectory.getSpeedPercentage(0) * ufoRule.getMaxSpeed());
ufo->setLongitude(pos.first);
ufo->setLatitude(pos.second);
Waypoint *wp = new Waypoint();
pos = getWaypoint(trajectory, 1, globe, regionRules);
wp->setLongitude(pos.first);
wp->setLatitude(pos.second);
ufo->setDestination(wp);
return ufo;
}
void AlienMission::start(size_t initialCount)
{
_nextWave = 0;
_nextUfoCounter = 0;
_liveUfos = 0;
if (initialCount == 0)
{
size_t spawnTimer = _rule.getWave(0).spawnTimer / 30;
_spawnCountdown = (spawnTimer / 2 + RNG::generate(0, spawnTimer)) * 30;
}
else
{
_spawnCountdown = initialCount;
}
}
/** @brief Match a base from it's coordinates.
* This function object uses coordinates to match a base.
*/
class MatchBaseCoordinates: public std::unary_function<const Base *, bool>
{
public:
/// Remember the query coordinates.
MatchBaseCoordinates(double lon, double lat) : _lon(lon), _lat(lat) { /* Empty by design. */ }
/// Match with base's coordinates.
bool operator()(const Base *base) const { return AreSame(base->getLongitude(), _lon) && AreSame(base->getLatitude(), _lat); }
private:
double _lon, _lat;
};
/**
* This function is called when one of the mission's UFOs arrives at it's current destination.
* It takes care of sending the UFO to the next waypoint, landing UFOs and
* marking them for removal as required. It must set the game data in a way that the rest of the code
* understands what to do.
* @param ufo The UFO that reached it's waypoint.
* @param engine The game engine, required to get access to game data and game rules.
* @param globe The earth globe, required to get access to land checks.
*/
void AlienMission::ufoReachedWaypoint(Ufo &ufo, Game &engine, const Globe &globe)
{
const Ruleset &rules = *engine.getRuleset();
SavedGame &game = *engine.getSavedGame();
const size_t curWaypoint = ufo.getTrajectoryPoint();
const size_t nextWaypoint = curWaypoint + 1;
const UfoTrajectory &trajectory = ufo.getTrajectory();
int waveNumber = _nextWave - 1;
if (waveNumber < 0)
{
waveNumber = _rule.getWaveCount() - 1;
}
const MissionWave &wave = _rule.getWave(waveNumber);
if (nextWaypoint >= trajectory.getWaypointCount())
{
ufo.setDetected(false);
ufo.setStatus(Ufo::DESTROYED);
return;
}
ufo.setAltitude(trajectory.getAltitude(nextWaypoint));
ufo.setTrajectoryPoint(nextWaypoint);
const RuleRegion ®ionRules = *rules.getRegion(_region);
std::pair<double, double> pos = getWaypoint(trajectory, nextWaypoint, globe, regionRules);
Waypoint *wp = new Waypoint();
wp->setLongitude(pos.first);
wp->setLatitude(pos.second);
ufo.setDestination(wp);
if (ufo.getAltitude() != "STR_GROUND")
{
if (ufo.getLandId() != 0)
{
ufo.setLandId(0);
}
// Set next waypoint.
ufo.setSpeed((int)(ufo.getRules()->getMaxSpeed() * trajectory.getSpeedPercentage(nextWaypoint)));
}
else
{
// UFO landed.
if (wave.objective && trajectory.getZone(curWaypoint) == (size_t)(_rule.getSpawnZone()))
{
// Remove UFO, replace with MissionSite.
addScore(ufo.getLongitude(), ufo.getLatitude(), game);
ufo.setStatus(Ufo::DESTROYED);
MissionArea area = regionRules.getMissionPoint(trajectory.getZone(curWaypoint), &ufo);
MissionSite *missionSite = spawnMissionSite(game, rules, area);
if (missionSite)
{
game.getMissionSites()->push_back(missionSite);
for (std::vector<Target*>::iterator t = ufo.getFollowers()->begin(); t != ufo.getFollowers()->end();)
{
Craft* c = dynamic_cast<Craft*>(*t);
if (c && c->getNumSoldiers() != 0)
{
c->setDestination(missionSite);
t = ufo.getFollowers()->begin();
}
else
{
++t;
}
}
}
}
else if (trajectory.getID() == UfoTrajectory::RETALIATION_ASSAULT_RUN)
{
// Ignore what the trajectory might say, this is a base assault.
// Remove UFO, replace with Base defense.
ufo.setDetected(false);
std::vector<Base *>::const_iterator found =
std::find_if (game.getBases()->begin(), game.getBases()->end(),
MatchBaseCoordinates(ufo.getLongitude(), ufo.getLatitude()));
if (found == game.getBases()->end())
{
ufo.setStatus(Ufo::DESTROYED);
// Only spawn mission if the base is still there.
return;
}
ufo.setDestination(*found);
}
else
{
if (globe.insideLand(ufo.getLongitude(), ufo.getLatitude()))
{
// Set timer for UFO on the ground.
ufo.setSecondsRemaining(trajectory.groundTimer() * 5);
if (ufo.getDetected() && ufo.getLandId() == 0)
{
ufo.setLandId(engine.getSavedGame()->getId("STR_LANDING_SITE"));
}
}
else
{
// There's nothing to land on
ufo.setSecondsRemaining(5);
}
}
}
}
/**
* This function is called when one of the mission's UFOs is shot down (crashed or destroyed).
* Currently the only thing that happens is delaying the next UFO in the mission sequence.
* @param ufo The UFO that was shot down.
*/
void AlienMission::ufoShotDown(Ufo &ufo)
{
switch (ufo.getStatus())
{
case Ufo::FLYING:
case Ufo::LANDED:
assert(0 && "Ufo seems ok!");
break;
case Ufo::CRASHED:
case Ufo::DESTROYED:
if (_nextWave != _rule.getWaveCount())
{
// Delay next wave
_spawnCountdown += 30 * (RNG::generate(0, 48) + 400);
}
break;
}
}
/**
* This function is called when one of the mission's UFOs has finished it's time on the ground.
* It takes care of sending the UFO to the next waypoint and marking them for removal as required.
* It must set the game data in a way that the rest of the code understands what to do.
* @param ufo The UFO that reached it's waypoint.
* @param game The saved game information.
* @param globe The earth globe, required to get access to land checks.
*/
void AlienMission::ufoLifting(Ufo &ufo, SavedGame &game, const Globe &globe)
{
switch (ufo.getStatus())
{
case Ufo::FLYING:
assert(0 && "Ufo is already on the air!");
break;
case Ufo::LANDED:
{
// base missions only get points when they are completed.
if (_rule.getPoints() > 0 && _rule.getObjective() != OBJECTIVE_BASE)
{
addScore(ufo.getLongitude(), ufo.getLatitude(), game);
}
ufo.setAltitude("STR_VERY_LOW");
ufo.setSpeed((int)(ufo.getRules()->getMaxSpeed() * ufo.getTrajectory().getSpeedPercentage(ufo.getTrajectoryPoint())));
}
break;
case Ufo::CRASHED:
// Mission expired
ufo.setDetected(false);
ufo.setStatus(Ufo::DESTROYED);
break;
case Ufo::DESTROYED:
assert(0 && "UFO can't fly!");
break;
}
}
/**
* The new time must be a multiple of 30 minutes, and more than 0.
* Calling this on a finished mission has no effect.
* @param minutes The minutes until the next UFO wave will spawn.
*/
void AlienMission::setWaveCountdown(size_t minutes)
{
assert(minutes != 0 && minutes % 30 == 0);
if (isOver())
{
return;
}
_spawnCountdown = minutes;
}
/**
* Assigns a unique ID to this mission.
* It is an error to assign two IDs to the same mission.
* @param id The UD to assign.
*/
void AlienMission::setId(int id)
{
assert(_uniqueID == 0 && "Reassigning ID!");
_uniqueID = id;
}
/**
* @return The unique ID assigned to this mission.
*/
int AlienMission::getId() const
{
assert(_uniqueID != 0 && "Uninitialized mission!");
return _uniqueID;
}
/**
* Sets the alien base associated with this mission.
* Only the alien supply missions care about this.
* @param base A pointer to an alien base.
*/
void AlienMission::setAlienBase(const AlienBase *base)
{
_base = base;
}
/**
* Only alien supply missions ever have a valid pointer.
* @return A pointer (possibly 0) of the AlienBase for this mission.
*/
const AlienBase *AlienMission::getAlienBase() const
{
return _base;
}
/**
* Add alien points to the country and region at the coordinates given.
* @param lon Longitudinal coordinates to check.
* @param lat Latitudinal coordinates to check.
* @param game The saved game information.
*/
void AlienMission::addScore(const double lon, const double lat, SavedGame &game)
{
for (std::vector<Region *>::iterator region = game.getRegions()->begin(); region != game.getRegions()->end(); ++region)
{
if ((*region)->getRules()->insideRegion(lon, lat))
{
(*region)->addActivityAlien(_rule.getPoints());
break;
}
}
for (std::vector<Country *>::iterator country = game.getCountries()->begin(); country != game.getCountries()->end(); ++country)
{
if ((*country)->getRules()->insideCountry(lon, lat))
{
(*country)->addActivityAlien(_rule.getPoints());
break;
}
}
}
/**
* Spawn an alien base.
* @param globe The earth globe, required to get access to land checks.
* @param engine The game engine, required to get access to game data and game rules.
* @param zone The mission zone, required for determining the base coordinates.
*/
void AlienMission::spawnAlienBase(const Globe &globe, Game &engine, int zone)
{
SavedGame &game = *engine.getSavedGame();
const Ruleset &ruleset = *engine.getRuleset();
// Once the last UFO is spawned, the aliens build their base.
const RuleRegion ®ionRules = *ruleset.getRegion(_region);
std::pair<double, double> pos = getLandPoint(globe, regionRules, zone);
AlienBase *ab = new AlienBase();
ab->setAlienRace(_race);
ab->setId(game.getId("STR_ALIEN_BASE"));
ab->setLongitude(pos.first);
ab->setLatitude(pos.second);
game.getAlienBases()->push_back(ab);
addScore(pos.first, pos.second, game);
}
/*
* Sets the mission's region. if the region is incompatible with
* actually carrying out an attack, use the "fallback" region as
* defined in the ruleset.
* (this is a slight difference from the original, which just
* defaulted them to zone[0], North America)
* @param region the region we want to try to set the mission to.
* @param rules the ruleset, in case we need to swap out the region.
*/
void AlienMission::setRegion(const std::string ®ion, const Ruleset &rules)
{
if (!rules.getRegion(region)->getMissionRegion().empty())
{
_region = rules.getRegion(region)->getMissionRegion();
}
else
{
_region = region;
}
}
/**
* Select a destination based on the criteria of our trajectory and desired waypoint.
* @param trajectory the trajectory in question.
* @param nextWaypoint the next logical waypoint in sequence (0 for newly spawned UFOs)
* @param globe The earth globe, required to get access to land checks.
* @param region the ruleset for the region of our mission.
* @return a set of lon and lat coordinates based on the criteria of the trajectory.
*/
std::pair<double, double> AlienMission::getWaypoint(const UfoTrajectory &trajectory, const size_t nextWaypoint, const Globe &globe, const RuleRegion ®ion)
{
/* LOOK MA! NO HANDS!
if (trajectory.getAltitude(nextWaypoint) == "STR_GROUND")
{
return getLandPoint(globe, region, trajectory.getZone(nextWaypoint));
}
else
*/
return region.getRandomPoint(trajectory.getZone(nextWaypoint));
}
/**
* Get a random point inside the given region zone.
* The point will be used to land a UFO, so it HAS to be on land.
*/
std::pair<double, double> AlienMission::getLandPoint(const Globe &globe, const RuleRegion ®ion, size_t zone)
{
int tries = 0;
std::pair<double, double> pos;
do
{
pos = region.getRandomPoint(zone);
++tries;
}
while (!(globe.insideLand(pos.first, pos.second)
&& region.insideRegion(pos.first, pos.second))
&& tries < 100);
if (tries == 100)
{
Log(LOG_DEBUG) << "Region: " << region.getType() << " Longitude: " << pos.first << " Latitude: " << pos.second << " invalid zone: " << zone << " ufo forced to land on water!";
}
return pos;
}
/**
* Attempt to spawn a Mission Site at a given location.
* @param game reference to the saved game.
* @param rules reference to the game rules.
* @param area the point on the globe at which to spawn this site.
* @return a pointer to the mission site.
*/
MissionSite *AlienMission::spawnMissionSite(SavedGame &game, const Ruleset &rules, const MissionArea &area)
{
Texture *texture = rules.getGlobe()->getTexture(area.texture);
AlienDeployment *deployment = rules.getDeployment(texture->getRandomDeployment());
if (deployment)
{
MissionSite *missionSite = new MissionSite(&_rule, deployment);
missionSite->setLongitude(area.lonMin);
missionSite->setLatitude(area.latMin);
missionSite->setId(game.getId(deployment->getMarkerName()));
missionSite->setSecondsRemaining(RNG::generate(deployment->getDurationMin(), deployment->getDurationMax()) * 3600);
missionSite->setAlienRace(_race);
missionSite->setTexture(area.texture);
missionSite->setCity(area.name);
missionSite->setSiteDepth(RNG::generate(deployment->getMinSiteDepth(), deployment->getMaxSiteDepth()));
return missionSite;
}
return 0;
}
}