/*
* MegaMek - Copyright (C) 2000,2001,2002,2003,2004 Ben Mazur (bmazur@sev.org)
*
* This program 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 2 of the License, or (at your option)
* any later version.
*
* This program 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.
*/
package megamek.common.actions;
import megamek.common.BipedMech;
import megamek.common.Compute;
import megamek.common.Entity;
import megamek.common.IGame;
import megamek.common.IHex;
import megamek.common.Mech;
import megamek.common.Mounted;
import megamek.common.Player;
import megamek.common.Protomech;
import megamek.common.TargetRoll;
import megamek.common.Targetable;
import megamek.common.ToHitData;
/**
* The attacker grapples the target.
*/
public class GrappleAttackAction extends PhysicalAttackAction {
/**
*
*/
private static final long serialVersionUID = -4178252788550426489L;
public GrappleAttackAction(int entityId, int targetId) {
super(entityId, targetId);
}
public GrappleAttackAction(int entityId, int targetType, int targetId) {
super(entityId, targetType, targetId);
}
public ToHitData toHit(IGame game) {
return toHit(game, getEntityId(), game.getTarget(getTargetType(), getTargetId()));
}
/**
* To-hit number
*/
public static ToHitData toHit(IGame game, int attackerId, Targetable target) {
return toHit(game,attackerId,target,Entity.GRAPPLE_BOTH);
}
public static ToHitData toHit(IGame game, int attackerId, Targetable target, int grappleSide) {
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_grappling"))
return new ToHitData(TargetRoll.IMPOSSIBLE, "grappling attack not allowed");
String impossible = toHitIsImpossible(game, ae, target);
if (impossible != null && !impossible.equals("Locked in Grapple")) {
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.");
}
IHex attHex = game.getBoard().getHex(ae.getPosition());
IHex targHex = game.getBoard().getHex(target.getPosition());
final int attackerElevation = ae.getElevation() + attHex.getElevation();
// final int attackerHeight = attackerElevation + ae.getHeight();
final int targetElevation = target.getElevation() + targHex.getElevation();
// final int targetHeight = targetElevation + target.getHeight();
ToHitData toHit;
// non-mechs can't grapple or be grappled
if ((!(ae instanceof BipedMech) && !(ae instanceof Protomech)) || (!(target instanceof Mech) && !(target instanceof Protomech))) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Only biped mechs can grapple 'Mechs and Protomechs");
}
Entity te = (Entity) target;
final boolean counter = ae.getGrappled() != Entity.NONE && !ae.isGrappleAttacker();
// requires 2 good arms
if (grappleSide == Entity.GRAPPLE_BOTH ) {
if ( ae.isLocationBad(Mech.LOC_LARM) || ae.isLocationBad(Mech.LOC_RARM) ) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Arm missing");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_SHOULDER, Mech.LOC_RARM)
|| !ae.hasWorkingSystem(Mech.ACTUATOR_SHOULDER, Mech.LOC_LARM)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Shoulder missing/destroyed");
}
}else if ( grappleSide == Entity.GRAPPLE_LEFT ) {
if ( ae.isLocationBad(Mech.LOC_LARM) ) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Arm missing");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_SHOULDER, Mech.LOC_LARM)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Shoulder missing/destroyed");
}
} else {
if ( ae.isLocationBad(Mech.LOC_RARM) ) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Arm missing");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_SHOULDER, Mech.LOC_RARM)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Shoulder missing/destroyed");
}
}
// check range
final int range = ae.getPosition().distance(target.getPosition());
if (range != 1 && !counter) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target not in range");
}
// check elevation (attacker must be able to enter target hex)
if (Math.abs(attackerElevation - targetElevation) > ae.getMaxElevationChange()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target elevation not in range");
}
// check facing
if (!counter && !Compute.isInArc(ae.getPosition(), ae.getFacing(), target.getPosition(), Compute.ARC_FORWARD)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target not in arc");
}
// can't grapple 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");
}
// check if attacker has fired any weapons
if (!counter) {
for (Mounted mounted : ae.getWeaponList()) {
if (mounted.isUsedThisRound()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Fired weapons");
}
}
}
// already done?
int atGr = ae.getGrappled();
int deGr = te.getGrappled();
if ((atGr != Entity.NONE || deGr != Entity.NONE) && atGr != target.getTargetId() && te.isGrappleAttacker()) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Already grappled");
}
// Set the base BTH
int base = ae.getCrew().getPiloting();
// Start the To-Hit
toHit = new ToHitData(base, "base");
setCommonModifiers(toHit, game, ae, target);
if (ae instanceof Mech && grappleSide == Entity.GRAPPLE_BOTH ) {
// damaged or missing actuators
if (!ae.hasWorkingSystem(Mech.ACTUATOR_UPPER_ARM, Mech.LOC_LARM)) {
toHit.addModifier(2, "Left upper arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_LOWER_ARM, Mech.LOC_LARM)) {
toHit.addModifier(2, "Left lower arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HAND, Mech.LOC_LARM)) {
toHit.addModifier(1, "Left hand actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_UPPER_ARM, Mech.LOC_RARM)) {
toHit.addModifier(2, "Right upper arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_LOWER_ARM, Mech.LOC_RARM)) {
toHit.addModifier(2, "Right lower arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HAND, Mech.LOC_RARM)) {
toHit.addModifier(1, "Right hand actuator destroyed");
}
if ( ae.hasFunctionalArmAES(Mech.LOC_RARM) && ae.hasFunctionalArmAES(Mech.LOC_LARM) ) {
toHit.addModifier(-1,"AES modifer");
}
} else if (ae instanceof Mech && grappleSide == Entity.GRAPPLE_RIGHT ) {
// damaged or missing actuators
if (!ae.hasWorkingSystem(Mech.ACTUATOR_UPPER_ARM, Mech.LOC_RARM)) {
toHit.addModifier(2, "Right upper arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_LOWER_ARM, Mech.LOC_RARM)) {
toHit.addModifier(2, "Right lower arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HAND, Mech.LOC_RARM)) {
toHit.addModifier(1, "Right hand actuator destroyed");
}
if ( ae.hasFunctionalArmAES(Mech.LOC_RARM)) {
toHit.addModifier(-1,"AES modifer");
}
} else {
// damaged or missing actuators
if (!ae.hasWorkingSystem(Mech.ACTUATOR_UPPER_ARM, Mech.LOC_LARM)) {
toHit.addModifier(2, "Left upper arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_LOWER_ARM, Mech.LOC_LARM)) {
toHit.addModifier(2, "Left lower arm actuator destroyed");
}
if (!ae.hasWorkingSystem(Mech.ACTUATOR_HAND, Mech.LOC_LARM)) {
toHit.addModifier(1, "Left hand actuator destroyed");
}
if ( ae.hasFunctionalArmAES(Mech.LOC_LARM) ) {
toHit.addModifier(-1,"AES modifer");
}
}
if ( grappleSide != Entity.GRAPPLE_BOTH && ae instanceof Mech ) {
Mech attacker = (Mech)ae;
if ( attacker.hasTSM() && attacker.heat >= 9
&& ( !(te instanceof Mech) || !((Mech)te).hasTSM() || (((Mech)te).hasTSM() && te.heat < 9))) {
toHit.addModifier(-2, "TSM Active Bonus");
}
}
// Weight class difference
int wmod = te.getWeightClass() - ae.getWeightClass();
if (te instanceof Protomech && !(ae instanceof Protomech)) {
wmod = ae.getWeightClass() * -1;
} else if (ae instanceof Protomech && !(te instanceof Protomech)) {
wmod = te.getWeightClass();
} else if (te instanceof Protomech && ae instanceof Protomech) {
wmod = 0;
}
if (wmod != 0) {
toHit.addModifier(wmod, "Weight class difference");
}
// done!
return toHit;
}
}