/**
* To-hit number for the specified leg to kick
*/
public static ToHitData toHit(IGame game, int attackerId, Targetable target) {
final Entity ae = game.getEntity(attackerId);
if (ae == null) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "You can't attack from a null entity!");
}
if (!game.getOptions().booleanOption("tacops_trip_attack")) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "no Trip attack");
}
String impossible = PhysicalAttackAction.toHitIsImpossible(game, ae, target);
if (impossible != null) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "impossible");
}
if ( ae.getGrappled() != Entity.NONE ) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "impossible");
}
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() != Player.TEAM_NONE
&& ae.getOwner().getTeam() != Player.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.");
}
}
ToHitData toHit;
// non-mechs can't trip or be tripped
if (!(ae instanceof Mech) || !(target instanceof Mech)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Only mechs can trip other mechs");
}
// described as a leg hook
// needs 2 legs present
if (ae.isLocationBad(Mech.LOC_LLEG) || ae.isLocationBad(Mech.LOC_RLEG)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Leg missing");
}
// check range
final int range = ae.getPosition().distance(target.getPosition());
if (range > 1) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target out of range");
}
int limb1 = Entity.LOC_NONE;
// check facing
if (!Compute.isInArc(ae.getPosition(), ae.getFacing(), target.getPosition(), Compute.ARC_FORWARD)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target not in arc");
}
// can't trip while prone
if (ae.isProne()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Attacker is prone");
}
if (((Entity) target).isProne()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is prone");
}
IHex attHex = game.getBoard().getHex(ae.getPosition());
IHex targHex = game.getBoard().getHex(target.getPosition());
final int attackerElevation = ae.getElevation() + attHex.getElevation();
final int targetElevation = target.getElevation()
+ targHex.getElevation();
if (attackerElevation != targetElevation){
return new ToHitData(TargetRoll.IMPOSSIBLE, "Attacker and Target must be at the same elevation");
}
// check if attacker has fired leg-mounted weapons
boolean usedWeapons[] = new boolean[ae.locations()];
for (int i = 0; i < ae.locations(); i++) {
usedWeapons[i] = false;
}
for (Mounted mounted : ae.getWeaponList()) {
if (mounted.isUsedThisRound()) {
int loc = mounted.getLocation();
if (loc != Entity.LOC_NONE) {
usedWeapons[loc] = true;
}
}
}
// check for good hips / shoulders
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HIP, Mech.LOC_RLEG)) {
usedWeapons[Mech.LOC_RLEG] = true;
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HIP, Mech.LOC_LLEG)) {
usedWeapons[Mech.LOC_LLEG] = true;
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HIP, Mech.LOC_RARM)) {
usedWeapons[Mech.LOC_RARM] = true;
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HIP, Mech.LOC_LARM)) {
usedWeapons[Mech.LOC_LARM] = true;
}
if (ae instanceof QuadMech) {
if (usedWeapons[Mech.LOC_RARM]) {
if (usedWeapons[Mech.LOC_LARM]) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "both legs unusable");
}
limb1 = Mech.LOC_LARM;
}
}
// normal attack uses both legs
else if (usedWeapons[Mech.LOC_RLEG]) {
if (usedWeapons[Mech.LOC_LLEG]) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "both legs unusable");
}
limb1 = Mech.LOC_LLEG;
}
// Set the base BTH
int base = ae.getCrew().getPiloting() - 1;
// Start the To-Hit
toHit = new ToHitData(base, "base");
PhysicalAttackAction.setCommonModifiers(toHit, game, ae, target);
// Get best leg
if ( ae instanceof QuadMech ) {
if (limb1 == Entity.LOC_NONE) {
ToHitData left = TripAttackAction.getLimbModifier(Mech.LOC_LARM, ae);
ToHitData right = TripAttackAction.getLimbModifier(Mech.LOC_RARM, ae);
if (left.getValue() < right.getValue()) {
toHit.append(left);
} else {
toHit.append(right);
}
} else {
toHit.append(TripAttackAction.getLimbModifier(limb1, ae));
}
}
else if (limb1 == Entity.LOC_NONE) {
ToHitData left = TripAttackAction.getLimbModifier(Mech.LOC_LLEG, ae);
ToHitData right = TripAttackAction.getLimbModifier(Mech.LOC_RLEG, ae);
if (left.getValue() < right.getValue()) {
toHit.append(left);
} else {
toHit.append(right);
}
} else {
toHit.append(TripAttackAction.getLimbModifier(limb1, ae));
}
if ( ae.hasFunctionalLegAES() ) {
toHit.addModifier(-1, "AES modifer");
}
// done!
return toHit;