/*
* 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.
*/
/*
* DfaAttackAction.java
*
* Created on March 16, 2002, 11:43 AM
*/
package megamek.common.actions;
import java.util.Enumeration;
import megamek.common.BattleArmor;
import megamek.common.BipedMech;
import megamek.common.Compute;
import megamek.common.Coords;
import megamek.common.CriticalSlot;
import megamek.common.Entity;
import megamek.common.EntityWeightClass;
import megamek.common.GunEmplacement;
import megamek.common.IEntityMovementType;
import megamek.common.IGame;
import megamek.common.Infantry;
import megamek.common.Mech;
import megamek.common.MiscType;
import megamek.common.MovePath;
import megamek.common.MoveStep;
import megamek.common.Player;
import megamek.common.Tank;
import megamek.common.TargetRoll;
import megamek.common.Targetable;
import megamek.common.ToHitData;
import megamek.common.VTOL;
/**
* @author Ben
* @version
*/
public class DfaAttackAction extends DisplacementAttackAction {
/**
*
*/
private static final long serialVersionUID = 3953889779582616903L;
/** Creates new DfaAttackAction */
public DfaAttackAction(int entityId, int targetId, Coords targetPos) {
super(entityId, targetId, targetPos);
}
public DfaAttackAction(int entityId, int targetType, int targetId,
Coords targetPos) {
super(entityId, targetType, targetId, targetPos);
}
/**
* Damage done to a mech after a successful DFA.
*/
public static int getDamageTakenBy(Entity entity) {
return (int) Math.ceil(entity.getWeight() / 5.0);
}
/**
* Damage that a mech does with a successful DFA.
*/
public static int getDamageFor(Entity entity, boolean targetInfantry) {
int toReturn = (int) Math.ceil((entity.getWeight() / 10.0) * 3.0);
if ( hasTalons(entity) ) {
toReturn *= 1.5;
}
if (targetInfantry) {
toReturn = Math.max(1, toReturn / 10);
}
return toReturn;
}
/**
* Checks if a death from above attack can hit the target, including
* movement
*/
public static ToHitData toHit(IGame game, int attackerId,
Targetable target, MovePath md) {
final Entity ae = game.getEntity(attackerId);
// Do to pretreatment of physical attacks, the target may be null.
if (target == null) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Target is null");
}
Entity te = null;
if (target.getTargetType() == Targetable.TYPE_ENTITY) {
te = (Entity) target;
}
Coords chargeSrc = ae.getPosition();
MoveStep chargeStep = null;
// Infantry CAN'T dfa!!!
if (ae instanceof Infantry) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "Infantry can't D.F.A.");
}
if (ae.getJumpType() == Mech.JUMP_BOOSTER) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Can't D.F.A. using mechanical jump boosters.");
}
// let's just check this
if (!md.contains(MovePath.STEP_DFA)) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"D.F.A. action not found in movment path");
}
// have to jump
if (!md.contains(MovePath.STEP_START_JUMP)) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"D.F.A. must involve jumping");
}
// Can't target a transported entity.
if ((te != null) && (Entity.NONE != te.getTransportId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Target is a passenger.");
}
//no evading
if(md.contains(MovePath.STEP_EVADE)) {
return new ToHitData(TargetRoll.IMPOSSIBLE, "No evading while charging");
}
// Can't target a entity conducting a swarm attack.
if ((te != null) && (Entity.NONE != te.getSwarmTargetId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Target is swarming a Mek.");
}
// determine last valid step
md.compile(game, ae);
for (final Enumeration<MoveStep> i = md.getSteps(); i.hasMoreElements();) {
final MoveStep step = i.nextElement();
if (!step.isLegal()) {
break;
}
if (step.getType() == MovePath.STEP_DFA) {
chargeStep = step;
} else {
chargeSrc = step.getPosition();
}
}
// need to reach target
if ((chargeStep == null)
|| !target.getPosition().equals(chargeStep.getPosition())) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Could not reach target with movement");
}
// target must have moved already
if ((te != null) && !te.isDone()) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Target must be done with movement");
}
return toHit(game, attackerId, target, chargeSrc);
}
public ToHitData toHit(IGame game) {
final Entity entity = game.getEntity(getEntityId());
return toHit(game, getEntityId(), game.getTarget(getTargetType(),
getTargetId()), entity.getPosition());
}
/**
* 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();
}
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.");
}
}
final boolean targetInBuilding = Compute.isInBuilding(game, te);
ToHitData toHit = null;
final int attackerElevation = ae.getElevation() + game.getBoard().getHex(ae.getPosition()).getElevation();
final int targetElevation = target.getElevation()
+ game.getBoard().getHex(target.getPosition()).getElevation();
final int attackerHeight = attackerElevation + ae.getHeight();
// check elevation of target flying VTOL
if ((target instanceof VTOL) && ((VTOL)target).isFlying()) {
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 ((te != null) && (Entity.NONE != te.getTransportId())) {
return new ToHitData(TargetRoll.IMPOSSIBLE,
"Target is a passenger.");
}
// Can't target a entity conducting a swarm attack.
if ((te != null) && (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 != null) && 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 != null) && 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");
}
// attacker movement
toHit.append(Compute.getAttackerMovementModifier(game, attackerId,
IEntityMovementType.MOVE_JUMP));
// target movement
toHit.append(Compute.getTargetMovementModifier(game, targetId));
// piloting skill differential
if ((te != null)
&& (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 != null) && 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(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("tacops_attack_physical_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;
}
public static boolean hasTalons(Entity entity){
if ( entity instanceof Mech ){
if ( entity instanceof BipedMech ){
return (entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_RLEG) && entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_RLEG)) || (entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_LLEG) && entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_LLEG));
}else{
return (entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_RLEG) && entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_RLEG)) || (entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_LLEG) && entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_LLEG)) || ((entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_RARM)) && (entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_RARM) || (entity.hasWorkingMisc(MiscType.F_TALON, -1, Mech.LOC_LARM) && entity.hasWorkingSystem(Mech.ACTUATOR_FOOT, Mech.LOC_LARM))));
}
}
return false;
}
}