Exemplo n.º 1
0
  /** 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;
  }