/** To-hit number for a death from above attack, assuming that movement has been handled */
public static ToHitData toHit(IGame game, int attackerId, Targetable target, Coords src) {
final Entity ae = game.getEntity(attackerId);
// arguments legal?
if (ae == null) {
throw new IllegalArgumentException("Attacker is null");
}
// Do to pretreatment of physical attacks, the target may be null.
if (target == null) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is null");
}
int targetId = Entity.NONE;
Entity te = null;
if (target.getTargetType() == Targetable.TYPE_ENTITY) {
te = (Entity) target;
targetId = target.getTargetId();
} else {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Invalid Target");
}
if (!game.getOptions().booleanOption("friendly_fire")) {
// a friendly unit can never be the target of a direct attack.
if ((target.getTargetType() == Targetable.TYPE_ENTITY)
&& ((((Entity) target).getOwnerId() == ae.getOwnerId())
|| ((((Entity) target).getOwner().getTeam() != IPlayer.TEAM_NONE)
&& (ae.getOwner().getTeam() != IPlayer.TEAM_NONE)
&& (ae.getOwner().getTeam() == ((Entity) target).getOwner().getTeam())))) {
return new ToHitData(
TargetRoll.IMPOSSIBLE, "A friendly unit can never be the target of a direct attack.");
}
}
final boolean targetInBuilding = Compute.isInBuilding(game, te);
ToHitData toHit = null;
final int attackerElevation =
ae.getElevation() + game.getBoard().getHex(ae.getPosition()).getLevel();
final int targetElevation =
target.getElevation() + game.getBoard().getHex(target.getPosition()).getLevel();
final int attackerHeight = attackerElevation + ae.getHeight();
// check elevation of target flying VTOL
if (target.isAirborneVTOLorWIGE()) {
if ((targetElevation - attackerHeight) > ae.getJumpMP()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Elevation difference to high");
}
}
// can't target yourself
if (ae.equals(te)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "You can't target yourself");
}
// Infantry CAN'T dfa!!!
if (ae instanceof Infantry) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Infantry can't dfa");
}
// Can't target a transported entity.
if ((Entity.NONE != te.getTransportId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is a passenger.");
}
// Can't target a entity conducting a swarm attack.
if ((Entity.NONE != te.getSwarmTargetId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is swarming a Mek.");
}
// check range
if (src.distance(target.getPosition()) > 1) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target not in range");
}
// can't dfa while prone, even if you somehow did manage to jump
if (ae.isProne()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Attacker is prone");
}
// can't attack mech making a different displacement attack
if (te.hasDisplacementAttack()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is already making a charge/DFA attack");
}
// can't attack the target of another displacement attack
if (te.isTargetOfDisplacementAttack()
&& (te.findTargetedDisplacement().getEntityId() != ae.getId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is the target of another charge/DFA");
}
// Can't target units in buildings (from the outside).
if (targetInBuilding) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is inside building");
}
// Attacks against adjacent buildings automatically hit.
if ((target.getTargetType() == Targetable.TYPE_BUILDING)
|| (target.getTargetType() == Targetable.TYPE_FUEL_TANK)
|| (target instanceof GunEmplacement)) {
return new ToHitData(TargetRoll.AUTOMATIC_SUCCESS, "Targeting adjacent building.");
}
// Can't target woods or ignite a building with a physical.
if ((target.getTargetType() == Targetable.TYPE_BLDG_IGNITE)
|| (target.getTargetType() == Targetable.TYPE_HEX_CLEAR)
|| (target.getTargetType() == Targetable.TYPE_HEX_IGNITE)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Invalid attack");
}
// Set the base BTH
int base = ae.getCrew().getPiloting();
toHit = new ToHitData(base, "base");
// BMR(r), page 33. +3 modifier for DFA on infantry.
if (te instanceof Infantry) {
toHit.addModifier(3, "Infantry target");
}
// Battle Armor targets are hard for Meks and Tanks to hit.
if (te instanceof BattleArmor) {
toHit.addModifier(1, "battle armor target");
}
if ((ae instanceof Mech) && ((Mech) ae).isSuperHeavy()) {
toHit.addModifier(1, "attacker is superheavy mech");
}
// attacker movement
toHit.append(
Compute.getAttackerMovementModifier(game, attackerId, EntityMovementType.MOVE_JUMP));
// target movement
toHit.append(Compute.getTargetMovementModifier(game, targetId));
// piloting skill differential
if ((ae.getCrew().getPiloting() != te.getCrew().getPiloting())) {
toHit.addModifier(
ae.getCrew().getPiloting() - te.getCrew().getPiloting(), "piloting skill differential");
}
// attacker is spotting
if (ae.isSpotting()) {
toHit.addModifier(+1, "attacker is spotting");
}
// target prone
if (te.isProne()) {
toHit.addModifier(-2, "target prone and adjacent");
}
// If it has a torso-mounted cockpit and two head sensor hits or three
// sensor hits...
// It gets a =4 penalty for being blind!
if ((ae instanceof Mech) && (((Mech) ae).getCockpitType() == Mech.COCKPIT_TORSO_MOUNTED)) {
int sensorHits =
ae.getBadCriticals(CriticalSlot.TYPE_SYSTEM, Mech.SYSTEM_SENSORS, Mech.LOC_HEAD);
int sensorHits2 =
ae.getBadCriticals(CriticalSlot.TYPE_SYSTEM, Mech.SYSTEM_SENSORS, Mech.LOC_CT);
if ((sensorHits + sensorHits2) == 3) {
return new ToHitData(
TargetRoll.IMPOSSIBLE, "Sensors Completely Destroyed for Torso-Mounted Cockpit");
} else if (sensorHits == 2) {
toHit.addModifier(4, "Head Sensors Destroyed for Torso-Mounted Cockpit");
}
}
// target immobile
toHit.append(Compute.getImmobileMod(te));
toHit.append(AbstractAttackAction.nightModifiers(game, target, null, ae, false));
Compute.modifyPhysicalBTHForAdvantages(ae, te, toHit, game);
// evading bonuses (
if (te.isEvading()) {
toHit.addModifier(te.getEvasionBonus(), "target is evading");
}
if (te instanceof Tank) {
toHit.setSideTable(ToHitData.SIDE_FRONT);
toHit.setHitTable(ToHitData.HIT_NORMAL);
} else if (te.isProne()) {
toHit.setSideTable(ToHitData.SIDE_REAR);
toHit.setHitTable(ToHitData.HIT_NORMAL);
} else {
toHit.setSideTable(te.sideTable(src));
toHit.setHitTable(ToHitData.HIT_PUNCH);
}
// Attacking Weight Class Modifier.
if (game.getOptions().booleanOption(OptionsConstants.AGM_TAC_OPS_PHYSICAL_ATTACK_PSR)) {
if (ae.getWeightClass() == EntityWeightClass.WEIGHT_LIGHT) {
toHit.addModifier(-2, "Weight Class Attack Modifier");
} else if (ae.getWeightClass() == EntityWeightClass.WEIGHT_MEDIUM) {
toHit.addModifier(-1, "Weight Class Attack Modifier");
}
}
if ((ae instanceof Mech) && ((Mech) ae).hasIndustrialTSM()) {
toHit.addModifier(2, "industrial TSM");
}
// done!
return toHit;
}