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Copy pathProjectileFlyBState.cpp
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734 lines (695 loc) · 23.9 KB
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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 <cmath>
#include "ProjectileFlyBState.h"
#include "ExplosionBState.h"
#include "Projectile.h"
#include "TileEngine.h"
#include "Map.h"
#include "Pathfinding.h"
#include "../Savegame/BattleUnit.h"
#include "../Savegame/BattleItem.h"
#include "../Savegame/SavedBattleGame.h"
#include "../Savegame/Tile.h"
#include "../Mod/Mod.h"
#include "../Engine/Sound.h"
#include "../Mod/RuleItem.h"
#include "../Engine/Options.h"
#include "AlienBAIState.h"
#include "Camera.h"
#include "Explosion.h"
#include "BattlescapeState.h"
#include "../Savegame/BattleUnitStatistics.h"
namespace OpenXcom
{
/**
* Sets up an ProjectileFlyBState.
*/
ProjectileFlyBState::ProjectileFlyBState(BattlescapeGame *parent, BattleAction action, Position origin) : BattleState(parent, action), _unit(0), _ammo(0), _projectileItem(0), _origin(origin), _originVoxel(-1,-1,-1), _projectileImpact(0), _initialized(false), _targetFloor(false)
{
}
ProjectileFlyBState::ProjectileFlyBState(BattlescapeGame *parent, BattleAction action) : BattleState(parent, action), _unit(0), _ammo(0), _projectileItem(0), _origin(action.actor->getPosition()), _originVoxel(-1,-1,-1), _projectileImpact(0), _initialized(false), _targetFloor(false)
{
}
/**
* Deletes the ProjectileFlyBState.
*/
ProjectileFlyBState::~ProjectileFlyBState()
{
}
/**
* Initializes the sequence:
* - checks if the shot is valid,
* - calculates the base accuracy.
*/
void ProjectileFlyBState::init()
{
if (_initialized) return;
_initialized = true;
BattleItem *weapon = _action.weapon;
_projectileItem = 0;
if (!weapon) // can't shoot without weapon
{
_parent->popState();
return;
}
if (!_parent->getSave()->getTile(_action.target)) // invalid target position
{
_parent->popState();
return;
}
if (_parent->getPanicHandled() &&
_action.actor->getTimeUnits() < _action.TU)
{
_action.result = "STR_NOT_ENOUGH_TIME_UNITS";
_parent->popState();
return;
}
_unit = _action.actor;
_ammo = weapon->getAmmoItem();
if (_unit->isOut() || _unit->getHealth() == 0 || _unit->getHealth() < _unit->getStunlevel())
{
// something went wrong - we can't shoot when dead or unconscious, or if we're about to fall over.
_parent->popState();
return;
}
// reaction fire
if (_unit->getFaction() != _parent->getSave()->getSide())
{
// no ammo or target is dead: give the time units back and cancel the shot.
if (_ammo == 0
|| !_parent->getSave()->getTile(_action.target)->getUnit()
|| _parent->getSave()->getTile(_action.target)->getUnit()->isOut()
|| _parent->getSave()->getTile(_action.target)->getUnit() != _parent->getSave()->getSelectedUnit())
{
_unit->setTimeUnits(_unit->getTimeUnits() + _unit->getActionTUs(_action.type, _action.weapon));
_parent->popState();
return;
}
_unit->lookAt(_action.target, _unit->getTurretType() != -1);
while (_unit->getStatus() == STATUS_TURNING)
{
_unit->turn();
}
}
Tile *endTile = _parent->getSave()->getTile(_action.target);
int distance = _parent->getTileEngine()->distance(_action.actor->getPosition(), _action.target);
switch (_action.type)
{
case BA_SNAPSHOT:
case BA_AIMEDSHOT:
case BA_AUTOSHOT:
case BA_LAUNCH:
if (_ammo == 0)
{
_action.result = "STR_NO_AMMUNITION_LOADED";
_parent->popState();
return;
}
if (_ammo->getAmmoQuantity() == 0)
{
_action.result = "STR_NO_ROUNDS_LEFT";
_parent->popState();
return;
}
if (distance > weapon->getRules()->getMaxRange())
{
// special handling for short ranges and diagonals
if (_action.actor->directionTo(_action.target) % 2 == 1)
{
// special handling for maxRange 1: allow it to target diagonally adjacent tiles, even though they are technically 2 tiles away.
if (weapon->getRules()->getMaxRange() == 1
&& distance == 2)
{
break;
}
// special handling for maxRange 2: allow it to target diagonally adjacent tiles on a level above/below, even though they are technically 3 tiles away.
else if (weapon->getRules()->getMaxRange() == 2
&& distance == 3
&& _action.target.z != _action.actor->getPosition().z)
{
break;
}
}
// out of range
_action.result = "STR_OUT_OF_RANGE";
_parent->popState();
return;
}
break;
case BA_THROW:
if (!validThrowRange(&_action, _parent->getTileEngine()->getOriginVoxel(_action, 0), _parent->getSave()->getTile(_action.target)))
{
// out of range
_action.result = "STR_OUT_OF_RANGE";
_parent->popState();
return;
}
if (endTile &&
endTile->getTerrainLevel() == -24 &&
endTile->getPosition().z + 1 < _parent->getSave()->getMapSizeZ())
{
_action.target.z += 1;
}
_projectileItem = weapon;
break;
default:
_parent->popState();
return;
}
if (_action.type == BA_LAUNCH || (Options::forceFire && (SDL_GetModState() & KMOD_CTRL) != 0 && _parent->getSave()->getSide() == FACTION_PLAYER) || !_parent->getPanicHandled())
{
// target nothing, targets the middle of the tile
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16 + 8, _action.target.z*24 + 12);
if (_action.type == BA_LAUNCH)
{
if (_targetFloor)
{
// launched missiles with two waypoints placed on the same tile: target the floor.
_targetVoxel.z -= 10;
}
else
{
// launched missiles go slightly higher than the middle.
_targetVoxel.z += 4;
}
}
}
else
{
// determine the target voxel.
// aim at the center of the unit, the object, the walls or the floor (in that priority)
// if there is no LOF to the center, try elsewhere (more outward).
// Store this target voxel.
Tile *targetTile = _parent->getSave()->getTile(_action.target);
Position hitPos;
Position originVoxel = _parent->getTileEngine()->getOriginVoxel(_action, _parent->getSave()->getTile(_origin));
if (targetTile->getUnit() != 0)
{
if (_origin == _action.target || targetTile->getUnit() == _unit)
{
// don't shoot at yourself but shoot at the floor
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16 + 8, _action.target.z*24);
}
else
{
_parent->getTileEngine()->canTargetUnit(&originVoxel, targetTile, &_targetVoxel, _unit);
}
}
else if (targetTile->getMapData(O_OBJECT) != 0)
{
if (!_parent->getTileEngine()->canTargetTile(&originVoxel, targetTile, O_OBJECT, &_targetVoxel, _unit))
{
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16 + 8, _action.target.z*24 + 10);
}
}
else if (targetTile->getMapData(O_NORTHWALL) != 0)
{
if (!_parent->getTileEngine()->canTargetTile(&originVoxel, targetTile, O_NORTHWALL, &_targetVoxel, _unit))
{
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16, _action.target.z*24 + 9);
}
}
else if (targetTile->getMapData(O_WESTWALL) != 0)
{
if (!_parent->getTileEngine()->canTargetTile(&originVoxel, targetTile, O_WESTWALL, &_targetVoxel, _unit))
{
_targetVoxel = Position(_action.target.x*16, _action.target.y*16 + 8, _action.target.z*24 + 9);
}
}
else if (targetTile->getMapData(O_FLOOR) != 0)
{
if (!_parent->getTileEngine()->canTargetTile(&originVoxel, targetTile, O_FLOOR, &_targetVoxel, _unit))
{
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16 + 8, _action.target.z*24 + 2);
}
}
else
{
// target nothing, targets the middle of the tile
_targetVoxel = Position(_action.target.x*16 + 8, _action.target.y*16 + 8, _action.target.z*24 + 12);
}
}
if (createNewProjectile())
{
_parent->getMap()->setCursorType(CT_NONE);
_parent->getMap()->getCamera()->stopMouseScrolling();
}
}
/**
* Tries to create a projectile sprite and add it to the map,
* calculating its trajectory.
* @return True, if the projectile was successfully created.
*/
bool ProjectileFlyBState::createNewProjectile()
{
++_action.autoShotCounter;
if (_action.type != BA_THROW || _action.type != BA_LAUNCH)
_unit->getStatistics()->shotsFiredCounter++;
// create a new projectile
Projectile *projectile = new Projectile(_parent->getMod(), _parent->getSave(), _action, _origin, _targetVoxel, _ammo);
// add the projectile on the map
_parent->getMap()->setProjectile(projectile);
// set the speed of the state think cycle to 16 ms (roughly one think cycle per frame)
_parent->setStateInterval(1000/60);
// let it calculate a trajectory
_projectileImpact = V_EMPTY;
double accuracyDivider = 100.0;
// berserking units are half as accurate
if (!_parent->getPanicHandled())
{
accuracyDivider = 200.0;
}
if (_action.type == BA_THROW)
{
_projectileImpact = projectile->calculateThrow(_unit->getThrowingAccuracy() / accuracyDivider);
if (_projectileImpact == V_FLOOR || _projectileImpact == V_UNIT || _projectileImpact == V_OBJECT)
{
if (_unit->getFaction() != FACTION_PLAYER && _projectileItem->getRules()->getBattleType() == BT_GRENADE)
{
_projectileItem->setFuseTimer(0);
}
_projectileItem->moveToOwner(0);
_unit->setCache(0);
_parent->getMap()->cacheUnit(_unit);
_parent->getMod()->getSoundByDepth(_parent->getDepth(), Mod::ITEM_THROW)->play(-1, _parent->getMap()->getSoundAngle(_unit->getPosition()));
_unit->addThrowingExp();
}
else
{
// unable to throw here
delete projectile;
_parent->getMap()->setProjectile(0);
_action.result = "STR_UNABLE_TO_THROW_HERE";
_action.TU = 0;
_parent->popState();
return false;
}
}
else if (_action.weapon->getRules()->getArcingShot()) // special code for the "spit" trajectory
{
_projectileImpact = projectile->calculateThrow(_unit->getFiringAccuracy(_action.type, _action.weapon) / accuracyDivider);
if (_projectileImpact != V_EMPTY && _projectileImpact != V_OUTOFBOUNDS)
{
// set the soldier in an aiming position
_unit->aim(true);
_unit->setCache(0);
_parent->getMap()->cacheUnit(_unit);
// and we have a lift-off
if (_ammo->getRules()->getFireSound() != -1)
{
_parent->getMod()->getSoundByDepth(_parent->getDepth(), _ammo->getRules()->getFireSound())->play(-1, _parent->getMap()->getSoundAngle(_unit->getPosition()));
}
else if (_action.weapon->getRules()->getFireSound() != -1)
{
_parent->getMod()->getSoundByDepth(_parent->getDepth(), _action.weapon->getRules()->getFireSound())->play(-1, _parent->getMap()->getSoundAngle(_unit->getPosition()));
}
if (!_parent->getSave()->getDebugMode() && _action.type != BA_LAUNCH && _ammo->spendBullet() == false)
{
_parent->getSave()->removeItem(_ammo);
_action.weapon->setAmmoItem(0);
}
}
else
{
// no line of fire
delete projectile;
_parent->getMap()->setProjectile(0);
if (_parent->getPanicHandled())
{
_action.result = "STR_NO_LINE_OF_FIRE";
}
else
{
_unit->setTimeUnits(_unit->getTimeUnits() + _action.TU); // refund shot TUs for berserking
}
_unit->abortTurn();
_parent->popState();
return false;
}
}
else
{
if (_originVoxel != Position(-1,-1,-1))
{
_projectileImpact = projectile->calculateTrajectory(_unit->getFiringAccuracy(_action.type, _action.weapon) / accuracyDivider, _originVoxel, false);
}
else
{
_projectileImpact = projectile->calculateTrajectory(_unit->getFiringAccuracy(_action.type, _action.weapon) / accuracyDivider);
}
if (_projectileImpact != V_EMPTY || _action.type == BA_LAUNCH)
{
// set the soldier in an aiming position
_unit->aim(true);
_unit->setCache(0);
_parent->getMap()->cacheUnit(_unit);
// and we have a lift-off
if (_ammo->getRules()->getFireSound() != -1)
{
_parent->getMod()->getSoundByDepth(_parent->getDepth(), _ammo->getRules()->getFireSound())->play(-1, _parent->getMap()->getSoundAngle(projectile->getOrigin()));
}
else if (_action.weapon->getRules()->getFireSound() != -1)
{
_parent->getMod()->getSoundByDepth(_parent->getDepth(), _action.weapon->getRules()->getFireSound())->play(-1, _parent->getMap()->getSoundAngle(projectile->getOrigin()));
}
if (!_parent->getSave()->getDebugMode() && _action.type != BA_LAUNCH && _ammo->spendBullet() == false)
{
_parent->getSave()->removeItem(_ammo);
_action.weapon->setAmmoItem(0);
}
}
else
{
// no line of fire
delete projectile;
_parent->getMap()->setProjectile(0);
if (_parent->getPanicHandled())
{
_action.result = "STR_NO_LINE_OF_FIRE";
}
else
{
_unit->setTimeUnits(_unit->getTimeUnits() + _action.TU); // refund shot TUs for berserking
}
_unit->abortTurn();
_parent->popState();
return false;
}
}
return true;
}
/**
* Animates the projectile (moves to the next point in its trajectory).
* If the animation is finished the projectile sprite is removed from the map,
* and this state is finished.
*/
void ProjectileFlyBState::think()
{
_parent->getSave()->getBattleState()->clearMouseScrollingState();
/* TODO refactoring : store the projectile in this state, instead of getting it from the map each time? */
if (_parent->getMap()->getProjectile() == 0)
{
Tile *t = _parent->getSave()->getTile(_action.actor->getPosition());
Tile *bt = _parent->getSave()->getTile(_action.actor->getPosition() + Position(0,0,-1));
bool hasFloor = t && !t->hasNoFloor(bt);
bool unitCanFly = _action.actor->getMovementType() == MT_FLY;
if (_action.type == BA_AUTOSHOT
&& _action.autoShotCounter < _action.weapon->getRules()->getAutoShots()
&& !_action.actor->isOut()
&& _ammo->getAmmoQuantity() != 0
&& (hasFloor || unitCanFly))
{
createNewProjectile();
if (_action.cameraPosition.z != -1)
{
_parent->getMap()->getCamera()->setMapOffset(_action.cameraPosition);
_parent->getMap()->invalidate();
}
}
else
{
if (_action.cameraPosition.z != -1 && _action.waypoints.size() <= 1)
{
_parent->getMap()->getCamera()->setMapOffset(_action.cameraPosition);
_parent->getMap()->invalidate();
}
if (!_parent->getSave()->getUnitsFalling() && _parent->getPanicHandled())
{
_parent->getTileEngine()->checkReactionFire(_unit);
}
if (!_unit->isOut())
{
_unit->abortTurn();
}
if (_parent->getSave()->getSide() == FACTION_PLAYER || _parent->getSave()->getDebugMode())
{
_parent->setupCursor();
}
_parent->convertInfected();
_parent->popState();
}
}
else
{
if (_action.type != BA_THROW && _ammo && _ammo->getRules()->getShotgunPellets() != 0)
{
// shotgun pellets move to their terminal location instantly as fast as possible
_parent->getMap()->getProjectile()->skipTrajectory();
}
if (!_parent->getMap()->getProjectile()->move())
{
// impact !
if (_action.type == BA_THROW)
{
_parent->getMap()->resetCameraSmoothing();
Position pos = _parent->getMap()->getProjectile()->getPosition(-1);
pos.x /= 16;
pos.y /= 16;
pos.z /= 24;
if (pos.y > _parent->getSave()->getMapSizeY())
{
pos.y--;
}
if (pos.x > _parent->getSave()->getMapSizeX())
{
pos.x--;
}
BattleItem *item = _parent->getMap()->getProjectile()->getItem();
_parent->getMod()->getSoundByDepth(_parent->getDepth(), Mod::ITEM_DROP)->play(-1, _parent->getMap()->getSoundAngle(pos));
if (Options::battleInstantGrenade && item->getRules()->getBattleType() == BT_GRENADE && item->getFuseTimer() == 0)
{
// it's a hot grenade to explode immediately
_parent->statePushFront(new ExplosionBState(_parent, _parent->getMap()->getProjectile()->getPosition(-1), item, _action.actor));
}
else
{
_parent->dropItem(pos, item);
if (_unit->getFaction() != FACTION_PLAYER && _projectileItem->getRules()->getBattleType() == BT_GRENADE)
{
_parent->getTileEngine()->setDangerZone(pos, item->getRules()->getExplosionRadius(), _action.actor);
}
}
}
else if (_action.type == BA_LAUNCH && _action.waypoints.size() > 1 && _projectileImpact == -1)
{
_origin = _action.waypoints.front();
_action.waypoints.pop_front();
_action.target = _action.waypoints.front();
// launch the next projectile in the waypoint cascade
ProjectileFlyBState *nextWaypoint = new ProjectileFlyBState(_parent, _action, _origin);
nextWaypoint->setOriginVoxel(_parent->getMap()->getProjectile()->getPosition(-1));
if (_origin == _action.target)
{
nextWaypoint->targetFloor();
}
_parent->statePushNext(nextWaypoint);
}
else
{
if (_parent->getSave()->getTile(_action.target)->getUnit())
{
_parent->getSave()->getTile(_action.target)->getUnit()->getStatistics()->shotAtCounter++; // Only counts for guns, not throws or launches
}
_parent->getMap()->resetCameraSmoothing();
if (_ammo && _action.type == BA_LAUNCH && _ammo->spendBullet() == false)
{
_parent->getSave()->removeItem(_ammo);
_action.weapon->setAmmoItem(0);
}
if (_projectileImpact != V_OUTOFBOUNDS)
{
int offset = 0;
// explosions impact not inside the voxel but two steps back (projectiles generally move 2 voxels at a time)
if (_ammo && _ammo->getRules()->getExplosionRadius() != 0 && _projectileImpact != V_UNIT)
{
offset = -2;
}
_parent->statePushFront(new ExplosionBState(_parent, _parent->getMap()->getProjectile()->getPosition(offset), _ammo, _action.actor, 0, (_action.type != BA_AUTOSHOT || _action.autoShotCounter == _action.weapon->getRules()->getAutoShots() || !_action.weapon->getAmmoItem())));
// special shotgun behaviour: trace extra projectile paths, and add bullet hits at their termination points.
if (_ammo && _ammo->getRules()->getShotgunPellets() != 0)
{
int i = 1;
while (i != _ammo->getRules()->getShotgunPellets())
{
// create a projectile
Projectile *proj = new Projectile(_parent->getMod(), _parent->getSave(), _action, _origin, _targetVoxel, _ammo);
// let it trace to the point where it hits
_projectileImpact = proj->calculateTrajectory(std::max(0.0, (_unit->getFiringAccuracy(_action.type, _action.weapon) / 100.0) - i * 5.0));
if (_projectileImpact != V_EMPTY)
{
// as above: skip the shot to the end of it's path
proj->skipTrajectory();
// insert an explosion and hit
if (_projectileImpact != V_OUTOFBOUNDS)
{
Explosion *explosion = new Explosion(proj->getPosition(1), _ammo->getRules()->getHitAnimation());
_parent->getMap()->getExplosions()->push_back(explosion);
_parent->getSave()->getTileEngine()->hit(proj->getPosition(1), _ammo->getRules()->getPower(), _ammo->getRules()->getDamageType(), 0);
}
}
++i;
delete proj;
}
}
if (_projectileImpact == 4)
{
BattleUnit *victim = _parent->getSave()->getTile(_parent->getMap()->getProjectile()->getPosition(offset) / Position(16,16,24))->getUnit();
BattleUnit *targetVictim = _parent->getSave()->getTile(_action.target)->getUnit(); // Who we were aiming at (not necessarily who we hit)
if (victim && !victim->isOut())
{
victim->getStatistics()->hitCounter++;
if (_unit->getOriginalFaction() == FACTION_PLAYER && victim->getOriginalFaction() == FACTION_PLAYER)
{
victim->getStatistics()->shotByFriendlyCounter++;
_unit->getStatistics()->shotFriendlyCounter++;
}
if (victim == targetVictim) // Hit our target
{
_unit->getStatistics()->shotsLandedCounter++;
if (_parent->getTileEngine()->distance(_action.actor->getPosition(), victim->getPosition()) > 30)
{
_unit->getStatistics()->longDistanceHitCounter++;
}
if (_unit->getFiringAccuracy(_action.type, _action.weapon) < _parent->getTileEngine()->distance(_action.actor->getPosition(), victim->getPosition()))
{
_unit->getStatistics()->lowAccuracyHitCounter++;
}
}
if (victim->getFaction() == FACTION_HOSTILE)
{
AlienBAIState *aggro = dynamic_cast<AlienBAIState*>(victim->getCurrentAIState());
if (aggro != 0)
{
aggro->setWasHitBy(_unit);
_unit->setTurnsSinceSpotted(0);
}
}
// Record the last unit to hit our victim. If a victim dies without warning*, this unit gets the credit.
// *Because the unit died in a fire or bled out.
victim->setMurdererId(_unit->getId());
if (_action.weapon != 0)
victim->setMurdererWeapon(_action.weapon->getRules()->getName());
if (_ammo != 0)
victim->setMurdererWeaponAmmo(_ammo->getRules()->getName());
}
}
}
else if (_action.type != BA_AUTOSHOT || _action.autoShotCounter == _action.weapon->getRules()->getAutoShots() || !_action.weapon->getAmmoItem())
{
_unit->aim(false);
_unit->setCache(0);
_parent->getMap()->cacheUnits();
}
}
delete _parent->getMap()->getProjectile();
_parent->getMap()->setProjectile(0);
}
}
}
/**
* Flying projectiles cannot be cancelled,
* but they can be "skipped".
*/
void ProjectileFlyBState::cancel()
{
if (_parent->getMap()->getProjectile())
{
_parent->getMap()->getProjectile()->skipTrajectory();
Position p = _parent->getMap()->getProjectile()->getPosition();
if (!_parent->getMap()->getCamera()->isOnScreen(Position(p.x/16, p.y/16, p.z/24), false, 0, false))
_parent->getMap()->getCamera()->centerOnPosition(Position(p.x/16, p.y/16, p.z/24));
}
}
/**
* Validates the throwing range.
* @param action Pointer to throw action.
* @param origin Position to throw from.
* @param target Tile to throw to.
* @return True when the range is valid.
*/
bool ProjectileFlyBState::validThrowRange(BattleAction *action, Position origin, Tile *target)
{
// note that all coordinates and thus also distances below are in number of tiles (not in voxels).
if (action->type != BA_THROW)
{
return true;
}
int offset = 2;
int zd = (origin.z)-((action->target.z * 24 + offset) - target->getTerrainLevel());
int weight = action->weapon->getRules()->getWeight();
if (action->weapon->getAmmoItem() && action->weapon->getAmmoItem() != action->weapon)
{
weight += action->weapon->getAmmoItem()->getRules()->getWeight();
}
double maxDistance = (getMaxThrowDistance(weight, action->actor->getBaseStats()->strength, zd) + 8) / 16.0;
int xdiff = action->target.x - action->actor->getPosition().x;
int ydiff = action->target.y - action->actor->getPosition().y;
double realDistance = sqrt((double)(xdiff*xdiff)+(double)(ydiff*ydiff));
return realDistance <= maxDistance;
}
/**
* Validates the throwing range.
* @param weight the weight of the object.
* @param strength the strength of the thrower.
* @param level the difference in height between the thrower and the target.
* @return the maximum throwing range.
*/
int ProjectileFlyBState::getMaxThrowDistance(int weight, int strength, int level)
{
double curZ = level + 0.5;
double dz = 1.0;
int dist = 0;
while (dist < 4000) //just in case
{
dist += 8;
if (dz<-1)
curZ -= 8;
else
curZ += dz * 8;
if (curZ < 0 && dz < 0) //roll back
{
dz = std::max(dz, -1.0);
if (std::abs(dz)>1e-10) //rollback horizontal
dist -= curZ / dz;
break;
}
dz -= (double)(50 * weight / strength)/100;
if (dz <= -2.0) //become falling
break;
}
return dist;
}
/**
* Set the origin voxel, used for the blaster launcher.
* @param pos the origin voxel.
*/
void ProjectileFlyBState::setOriginVoxel(Position pos)
{
_originVoxel = pos;
}
/**
* Set the boolean flag to angle a blaster bomb towards the floor.
*/
void ProjectileFlyBState::targetFloor()
{
_targetFloor = true;
}
}