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1113 lines (994 loc) · 22.1 KB
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/*
* Copyright 2010 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 "BattleUnit.h"
#include "BattleItem.h"
#include <cmath>
#include "../Engine/Palette.h"
#include "../Engine/Surface.h"
#include "../Engine/Language.h"
#include "../Battlescape/Pathfinding.h"
#include "../Battlescape/BattleAIState.h"
#include "Alien.h"
#include "Soldier.h"
#include "../Ruleset/RuleArmor.h"
#include "../Engine/RNG.h"
#include "../Ruleset/RuleInventory.h"
#include "Tile.h"
namespace OpenXcom
{
/**
* Initializes a BattleUnit.
* @param unit Pointer to Unit object.
* @param faction Which faction the units belongs to.
*/
BattleUnit::BattleUnit(Unit *unit, UnitFaction faction) : _unit(unit), _faction(faction), _id(0), _pos(Position()), _tile(0), _lastPos(Position()), _direction(0), _status(STATUS_STANDING), _walkPhase(0), _fallPhase(0), _kneeled(false), _dontReselect(false), _fire(0), _currentAIState(0), _visible(false), _cache(0), _cacheInvalid(true)
{
_tu = unit->getTimeUnits();
_energy = unit->getStamina();
_health = unit->getHealth();
_morale = 100;
_stunlevel = 0;
_armor[SIDE_FRONT] = unit->getArmor()->getFrontArmor();
_armor[SIDE_LEFT] = unit->getArmor()->getSideArmor();
_armor[SIDE_RIGHT] = unit->getArmor()->getSideArmor();
_armor[SIDE_REAR] = unit->getArmor()->getRearArmor();
_armor[SIDE_UNDER] = unit->getArmor()->getUnderArmor();
for (int i = 0; i < 6; ++i)
_fatalWounds[i] = 0;
}
/**
*
*/
BattleUnit::~BattleUnit()
{
delete _cache;
}
/**
* Loads the unit from a YAML file.
* @param node YAML node.
*/
void BattleUnit::load(const YAML::Node &node)
{
int a = 0;
node["id"] >> _id;
node["faction"] >> a;
_faction = (UnitFaction)a;
node["status"] >> a;
_status = (UnitStatus)a;
node["X"] >> _pos.x;
node["Y"] >> _pos.y;
node["Z"] >> _pos.z;
node["direction"] >> _direction;
node["tu"] >> _tu;
node["health"] >> _health;
node["energy"] >> _energy;
node["morale"] >> _morale;
node["kneeled"] >> _kneeled;
}
/**
* Saves the soldier to a YAML file.
* @param out YAML emitter.
*/
void BattleUnit::save(YAML::Emitter &out) const
{
out << YAML::BeginMap;
out << YAML::Key << "id" << YAML::Value << _id;
out << YAML::Key << "faction" << YAML::Value << _faction;
out << YAML::Key << "status" << YAML::Value << _status;
out << YAML::Key << "X" << YAML::Value << _pos.x;
out << YAML::Key << "Y" << YAML::Value << _pos.y;
out << YAML::Key << "Z" << YAML::Value << _pos.z;
out << YAML::Key << "direction" << YAML::Value << _direction;
out << YAML::Key << "tu" << YAML::Value << _tu;
out << YAML::Key << "health" << YAML::Value << _health;
out << YAML::Key << "energy" << YAML::Value << _energy;
out << YAML::Key << "morale" << YAML::Value << _morale;
out << YAML::Key << "kneeled" << YAML::Value << _kneeled;
out << YAML::EndMap;
}
/**
* Returns the BattleUnit's unique ID.
* @return Unique ID.
*/
int BattleUnit::getId() const
{
return _id;
}
/**
* Changes the BattleUnit's unique ID.
* @param id Unique ID.
*/
void BattleUnit::setId(int id)
{
_id = id;
}
/**
* Returns the BattleUnit's unit.
* @return Pointer to unit.
*/
Unit *const BattleUnit::getUnit() const
{
return _unit;
}
/**
* Changes the BattleUnit's position.
* @param pos position
*/
void BattleUnit::setPosition(const Position& pos)
{
_lastPos = _pos;
_pos = pos;
}
/**
* Gets the BattleUnit's position.
* @return position
*/
const Position& BattleUnit::getPosition() const
{
return _pos;
}
/**
* Gets the BattleUnit's position.
* @return position
*/
const Position& BattleUnit::getLastPosition() const
{
return _lastPos;
}
/**
* Gets the BattleUnit's destination.
* @return destination
*/
const Position& BattleUnit::getDestination() const
{
return _destination;
}
/**
* Changes the BattleUnit's direction.
* @param direction
*/
void BattleUnit::setDirection(int direction)
{
_direction = direction;
_toDirection = direction;
}
/**
* Changes the BattleUnit's direction.
* @return direction
*/
int BattleUnit::getDirection() const
{
return _direction;
}
/**
* Gets the unit's status.
* @return the unit's status
*/
UnitStatus BattleUnit::getStatus() const
{
return _status;
}
/**
* Initialises variables to start walking.
* @param direction Which way to walk.
* @param destination The position we should end up on.
*/
void BattleUnit::startWalking(int direction, const Position &destination)
{
_direction = direction;
_status = STATUS_WALKING;
_walkPhase = 0;
_destination = destination;
_lastPos = _pos;
_cacheInvalid = true;
_kneeled = false;
}
/**
* This will increment the walking phase.
*/
void BattleUnit::keepWalking()
{
int middle, end;
// diagonal walking takes double the steps
middle = 4 + 4 * (_direction % 2);
end = 8 + 8 * (_direction % 2);
_walkPhase++;
if (_walkPhase == middle)
{
// we assume we reached our destination tile
// this is actually a drawing hack, so soldiers are not overlapped by floortiles
_pos = _destination;
}
if (_walkPhase == end)
{
// we officially reached our destination tile
_status = STATUS_STANDING;
_walkPhase = 0;
}
_cacheInvalid = true;
}
/*
* Gets the walking phase for animation and sound.
* return phase will always go from 0-7
*/
int BattleUnit::getWalkingPhase() const
{
return _walkPhase % 8;
}
/*
* Gets the walking phase for diagonal walking.
* return phase this will be 0 or 8
*/
int BattleUnit::getDiagonalWalkingPhase() const
{
return (_walkPhase / 8) * 8;
}
/**
* Look at a point.
* @param point
*/
void BattleUnit::lookAt(const Position &point)
{
double ox = point.x - _pos.x;
double oy = point.y - _pos.y;
double angle = atan2(ox, oy);
if (angle < 0) angle += (M_PI*2); // convert to a range from 0 to M_PI*2
_toDirection = (int)((angle/(M_PI_4))+M_PI_4/2.0); // convert to 8 directions, somewhat rounded
if (_toDirection > 7) _toDirection = 7;
if (_toDirection != _direction)
{
_status = STATUS_TURNING;
}
}
/**
* Look at a direction.
* @param direction
*/
void BattleUnit::lookAt(int direction)
{
_toDirection = direction;
_status = STATUS_TURNING;
}
/**
* Advances the turning towards the target direction.
*/
void BattleUnit::turn()
{
int a = _toDirection - _direction;
if (a != 0) {
if (a > 0) {
if (a <= 4) {
_direction++;
} else {
_direction--;
}
} else {
if (a > -4) {
_direction--;
} else {
_direction++;
}
}
if (_direction < 0) _direction = 7;
if (_direction > 7) _direction = 0;
_cacheInvalid = true;
}
if (_toDirection == _direction)
{
// we officially reached our destination
_status = STATUS_STANDING;
}
}
/**
* Stops the turning towards the target direction.
*/
void BattleUnit::abortTurn()
{
_status = STATUS_STANDING;
}
/**
* Returns the unit's faction.
* @return Faction. (player, hostile or neutral)
*/
UnitFaction BattleUnit::getFaction() const
{
return _faction;
}
/**
* Sets the unit's cache flag.
* Set to true when the unit has to be redrawn from scratch.
* @param cache
*/
void BattleUnit::setCache(Surface *cache)
{
if (cache == 0)
{
_cacheInvalid = true;
}
else
{
_cache = cache;
_cacheInvalid = false;
}
}
/**
* Check if the unit is still cached in the Map cache.
* When the unit changes it needs to be re-cached.
* @param invalid
* @return cache
*/
Surface *BattleUnit::getCache(bool *invalid) const
{
*invalid = _cacheInvalid;
return _cache;
}
/**
* Kneel down.
* @param kneeled to kneel or to stand up
*/
void BattleUnit::kneel(bool kneeled)
{
_kneeled = kneeled;
_cacheInvalid = true;
}
/**
* Is kneeled down?
* @return true/false
*/
bool BattleUnit::isKneeled() const
{
return _kneeled;
}
/**
* Aim. (shows the right hand sprite and weapon holding)
* @param aiming
*/
void BattleUnit::aim(bool aiming)
{
if (aiming)
_status = STATUS_AIMING;
else
_status = STATUS_STANDING;
_cacheInvalid = true;
}
/**
* Returns the soldier's amount of time units.
* @return Time units.
*/
int BattleUnit::getTimeUnits() const
{
return _tu;
}
/**
* Returns the soldier's amount of energy.
* @return Energy.
*/
int BattleUnit::getEnergy() const
{
return _energy;
}
/**
* Returns the soldier's amount of health.
* @return Health.
*/
int BattleUnit::getHealth() const
{
return _health;
}
/**
* Returns the soldier's amount of morale.
* @return Morale.
*/
int BattleUnit::getMorale() const
{
return _morale;
}
/**
* Do an amount of damage.
* @param position The position defines which part of armor and/or bodypart is hit.
* @param power
*/
void BattleUnit::damage(Position position, int power)
{
int damage;
UnitSide side;
int impactheight;
UnitBodyPart bodypart;
if (power <= 0)
{
return;
}
if (position == Position(0, 0, 0))
{
side = SIDE_UNDER;
}
else
{
// normalize x and y
int x = 8, y = 8;
switch(_direction)
{
case 0: // heading north, all is the same
x = position.x;
y = position.y;
break;
case 1: // somewhere in between 0 and 2
x = (position.x + (15 - position.y))/2;
y = (position.y + position.x)/2;
break;
case 2: // heading east
x = 15 - position.y;
y = position.x;
break;
case 3:
x = ((15 - position.y) + (15 - position.x))/2;
y = (position.x + (15 - position.y))/2;
break;
case 4: // heading south, both axis inversed
x = 15 - position.x;
y = 15 - position.y;
break;
case 5:
x = ((15 - position.x) + position.y)/2;
y = ((15 - position.y) + (15 - position.x))/2;
break;
case 6: // heading west
x = position.y;
y = 15 - position.x;
break;
case 7:
x = (position.y + position.x)/2;
y = ((15 - position.x) + position.y)/2;
break;
}
// determine side
if (y > 9)
side = SIDE_FRONT;
else if (y < 6)
side = SIDE_REAR;
else if (x < 6)
side = SIDE_LEFT;
else if (x > 9)
side = SIDE_RIGHT;
else
side = SIDE_FRONT;
}
impactheight = 10*position.z/(isKneeled()?_unit->getKneelHeight():_unit->getStandHeight());
if (impactheight > 4 && impactheight < 7) // torso
{
if (side == SIDE_LEFT)
{
bodypart = BODYPART_LEFTARM;
}else if (side == SIDE_RIGHT)
{
bodypart = BODYPART_RIGHTARM;
}else
{
bodypart = BODYPART_TORSO;
}
}else if (impactheight >= 7) //head
{
bodypart = BODYPART_HEAD;
}else if (impactheight <=4) //legs
{
if (side == SIDE_LEFT || side == SIDE_FRONT)
{
bodypart = BODYPART_LEFTLEG;
}else
{
bodypart = BODYPART_RIGHTLEG;
}
}
damage = (power - getArmor(side));
if (damage > 0)
{
// fatal wounds
if (RNG::generate(0,damage) > 2)
_fatalWounds[bodypart] += RNG::generate(1,3);
if (_fatalWounds[bodypart])
moraleChange(-_fatalWounds[bodypart]);
// armor damage
setArmor(getArmor(side) - (damage+5)/10, side);
// health damage
_health -= damage;
if (_health < 0)
_health = 0;
}
}
/**
* Do an amount of stun. Can be negative amount = stun recovery.
* @param power
*/
void BattleUnit::stun(int power)
{
_stunlevel += power;
// recover from unconscious
if (_status == STATUS_UNCONSCIOUS && _stunlevel < _health && _health > 0)
{
_status = STATUS_STANDING;
}
}
int BattleUnit::getStunlevel() const
{
return _stunlevel;
}
/**
* Intialises the falling sequence. Occurs after death or stunned.
*/
void BattleUnit::startFalling()
{
_status = STATUS_FALLING;
_fallPhase = 0;
_cacheInvalid = true;
}
/**
* Advances the phase of falling sequence.
*/
void BattleUnit::keepFalling()
{
_fallPhase++;
if (_fallPhase == 3)
{
_fallPhase = 2;
if (_health == 0)
_status = STATUS_DEAD;
else
_status = STATUS_UNCONSCIOUS;
}
_cacheInvalid = true;
}
/**
* Returns the phase of the falling sequence.
* @return phase
*/
int BattleUnit::getFallingPhase() const
{
return _fallPhase;
}
/**
* Returns whether the soldier is out of combat, dead or unconscious.
* A soldier that is out, cannot perform any actions, cannot be selected, but it's still a unit.
* @return flag if out or not.
*/
bool BattleUnit::isOut() const
{
return _status == STATUS_DEAD || _status == STATUS_UNCONSCIOUS;
}
/**
* Get the number of time units a certain action takes.
* @param actionType
* @param item
* @return TUs
*/
int BattleUnit::getActionTUs(BattleActionType actionType, BattleItem *item) const
{
if (item == 0)
{
return 0;
}
switch (actionType)
{
case BA_PRIME:
return (int)floor(getUnit()->getTimeUnits() * 0.50);
case BA_THROW:
return (int)floor(getUnit()->getTimeUnits() * 0.25);
case BA_AUTOSHOT:
return (int)(getUnit()->getTimeUnits() * item->getRules()->getTUAuto() / 100);
case BA_SNAPSHOT:
return (int)(getUnit()->getTimeUnits() * item->getRules()->getTUSnap() / 100);
case BA_AIMEDSHOT:
return (int)(getUnit()->getTimeUnits() * item->getRules()->getTUAimed() / 100);
default:
return 0;
}
}
/**
* Spend time units if it can. Return false if it can't.
* @param tu
* @param debugmode If this is true, the function actually does noting.
* @return flag if it could spend the time units or not.
*/
bool BattleUnit::spendTimeUnits(int tu, bool debugmode)
{
if (debugmode && _faction == FACTION_PLAYER) return true;
if (tu <= _tu)
{
_tu -= tu;
return true;
}
else
{
return false;
}
}
/**
* Spend energy if it can. Return false if it can't.
* @param tu
* @param debugmode If this is true, the function actually does noting.
* @return flag if it could spend the time units or not.
*/
bool BattleUnit::spendEnergy(int tu, bool debugmode)
{
if (debugmode) return true;
int eu = tu / 3;
if (eu <= _energy)
{
_energy -= eu;
return true;
}
else
{
return false;
}
}
/**
* Set a specific number of timeunits.
* @param tu
*/
void BattleUnit::setTimeUnits(int tu)
{
_tu = tu;
}
/**
* Add this unit to the list of visible units. Returns true if this is a new one.
* @param unit
* @return
*/
bool BattleUnit::addToVisibleUnits(BattleUnit *unit)
{
for (std::vector<BattleUnit*>::iterator i = _visibleUnits.begin(); i != _visibleUnits.end(); ++i)
{
if ((BattleUnit*)(*i) == unit)
{
return false;
}
}
if (getFaction() == FACTION_PLAYER)
unit->setVisible(true);
_visibleUnits.push_back(unit);
return true;
}
/**
* Get the pointer to the vector of visible units.
* @return pointer to vector.
*/
std::vector<BattleUnit*> *const BattleUnit::getVisibleUnits()
{
return &_visibleUnits;
}
/**
* Clear visible units.
*/
void BattleUnit::clearVisibleUnits()
{
_visibleUnits.clear();
}
/**
* Calculate firing accuracy.
* Formula = accuracyStat * weaponAccuracy * kneelingbonus(1.15) * one-handPenalty(0.8) * woundsPenalty(% health) * critWoundsPenalty (-10%/wound)
* @param weaponAccuracy
* @return firing Accuracy
*/
double BattleUnit::getFiringAccuracy(int weaponAccuracy) const
{
double result = (double)(_unit->getFiringAccuracy()/100.0);
result *= (double)(weaponAccuracy/100.0);
if (_kneeled)
result *= 1.15;
result *= ((double)_health/(double)_unit->getHealth());
return result;
}
/**
* Calculate throwing accuracy.
* Formula = accuracyStat * woundsPenalty(% health) * critWoundsPenalty (-10%/wound)
* @return throwing Accuracy
*/
double BattleUnit::getThrowingAccuracy() const
{
double result = (double)(_unit->getFiringAccuracy()/100.0);
result *= ((double)_health/(double)_unit->getHealth());
return result;
}
/**
* Set the armor value of a certain armor side.
* @param armor Amount of armor.
* @param side The side of the armor.
*/
void BattleUnit::setArmor(int armor, UnitSide side)
{
if (armor < 0)
{
armor = 0;
}
_armor[side] = armor;
}
/**
* Get the armor value of a certain armor side.
* @param side The side of the armor.
* @return Amount of armor.
*/
int BattleUnit::getArmor(UnitSide side) const
{
return _armor[side];
}
/**
* Get total amount of fatal wounds this unit has.
* @return Number of fatal wounds.
*/
int BattleUnit::getFatalWounds() const
{
int sum = 0;
for (int i = 0; i < 6; ++i)
sum += _fatalWounds[i];
return sum;
}
/**
* Little formula to calculate reaction score.
* @return Reaction score.
*/
double BattleUnit::getReactionScore() const
{
//(Reactions Stat) × (Current Time Units / Max TUs)
double score = ((double)_unit->getReactions() * (double)getTimeUnits()) / (double)_unit->getTimeUnits();
return score;
}
/**
* Prepare for a new turn.
*/
void BattleUnit::prepareNewTurn()
{
// recover TUs
int TURecovery = _unit->getTimeUnits();
// Each fatal wound to the left or right leg reduces the soldier's TUs by 10%.
TURecovery -= (TURecovery * (_fatalWounds[BODYPART_LEFTLEG]+_fatalWounds[BODYPART_RIGHTLEG] * 10))/100;
setTimeUnits(TURecovery);
// recover energy
int ENRecovery = _unit->getTimeUnits() / 3;
// Each fatal wound to the body reduces the soldier's energy by 10%.
ENRecovery -= (_energy * (_fatalWounds[BODYPART_TORSO] * 10))/100;
_energy += ENRecovery;
if (_energy > _unit->getStamina())
_energy = _unit->getStamina();
// suffer from fatal wounds
_health -= getFatalWounds();
// suffer from fire
if (_fire > 0)
{
_health -= RNG::generate(5, 10);
_fire--;
}
if (_health < 0)
_health = 0;
// recover stun 1pt/turn
if (_stunlevel > 0)
stun(-1);
_dontReselect = false;
}
/**
* Morale change with bounds check.
* @param change can be positive or negative
*/
void BattleUnit::moraleChange(int change)
{
_morale += change;
if (_morale > 100)
_morale = 100;
if (_morale < 0)
_morale = 0;
}
/**
* Mark this unit is not reselectable.
*/
void BattleUnit::dontReselect()
{
_dontReselect = true;
}
/**
* Check whether reselecting this unit is allowed.
* @return bool
*/
bool BattleUnit::reselectAllowed() const
{
return !_dontReselect;
}
/**
* Set the amount of turns this unit is on fire. 0 = no fire.
* @param fire : amount of turns this tile is on fire.
*/
void BattleUnit::setFire(int fire)
{
_fire = fire;
}
/**
* Get the amount of turns this unit is on fire. 0 = no fire.
* @return fire : amount of turns this tile is on fire.
*/
int BattleUnit::getFire() const
{
return _fire;
}
/**
* Get the pointer to the vector of inventory items.
* @return pointer to vector.
*/
std::vector<BattleItem*> *const BattleUnit::getInventory()
{
return &_inventory;
}
/**
* Let AI do their thing.
* @param action AI action.
*/
void BattleUnit::think(BattleAction *action)
{
_currentAIState->think(action);
}
/**
* Changes the current AI state.
* @param aiState Pointer to AI state.
*/
void BattleUnit::setAIState(BattleAIState *aiState)
{
if (_currentAIState)
{
_currentAIState->exit();
delete _currentAIState;
}
_currentAIState = aiState;
_currentAIState->enter();
}
/**
* Returns the current AI state.
* @return Pointer to AI state.
*/
BattleAIState *BattleUnit::getCurrentAIState() const
{
return _currentAIState;
}
/**
* Set whether this unit is visible.
* @param flag
*/
void BattleUnit::setVisible(bool flag)
{
_visible = flag;
}
/**
* Get whether this unit is visible.
* @return flag
*/
bool BattleUnit::getVisible() const
{
if (getFaction() == FACTION_PLAYER)
{
return true;
}
else
{
return _visible;
}
}
/**
* Sets the unit's tile it's standing on