258 lines
12 KiB
TypeScript
258 lines
12 KiB
TypeScript
module TK.SpaceTac {
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/**
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* Get a list of all playable actions (like the actionbar for player) for a ship
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*/
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function getPlayableActions(ship: Ship): Iterable<BaseAction> {
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let actions = ship.actions.listAll();
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return ifilter(iarray(actions), action => !action.checkCannotBeApplied(ship));
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}
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/**
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* Get the proportional effect done to a ship's health (in -1,1 range)
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*/
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function getProportionalHealth(maneuver: Maneuver, ship: Ship): number {
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let chull = ship.getAttribute("hull_capacity");
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let cshield = ship.getAttribute("shield_capacity");
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let hull = ship.getValue("hull")
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let shield = ship.getValue("shield");
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let dhull = 0;
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let dshield = 0;
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maneuver.effects.forEach(diff => {
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if (diff instanceof ShipValueDiff) {
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if (ship.is(diff.ship_id)) {
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if (diff.code == "hull") {
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dhull += clamp(hull + diff.diff, 0, chull) - hull;
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} else if (diff.code == "shield") {
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dshield += clamp(shield + diff.diff, 0, cshield) - shield;
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}
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}
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}
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});
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if (hull + dhull <= 0) {
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return -1;
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} else {
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let diff = dhull + dshield;
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return clamp(diff / (hull + shield), -1, 1);
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}
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}
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/**
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* Standard producers and evaluators for TacticalAI
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*
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* These are static methods that may be used as base for TacticalAI ruleset.
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*/
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export class TacticalAIHelpers {
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/**
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* Iterator of a list of "random" arena coordinates, based on a grid
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*/
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static scanArena(battle: Battle, cells = 10, random = RandomGenerator.global): Iterable<Target> {
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return imap(irange(cells * cells), cellpos => {
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let y = Math.floor(cellpos / cells);
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let x = cellpos - y * cells;
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return Target.newFromLocation((x + random.random()) * battle.width / cells, (y + random.random()) * battle.height / cells);
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});
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}
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/**
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* Produce a turn end.
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*/
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static produceEndTurn(ship: Ship, battle: Battle): TacticalProducer {
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return isingle(new Maneuver(ship, EndTurnAction.SINGLETON, Target.newFromShip(ship)));
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}
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/**
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* Produce all "direct hit" weapon shots.
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*/
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static produceDirectShots(ship: Ship, battle: Battle): TacticalProducer {
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let enemies = battle.ienemies(ship, true);
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let weapons = ifilter(getPlayableActions(ship), action => action instanceof TriggerAction);
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return imap(icombine(enemies, weapons), ([enemy, weapon]) => new Maneuver(ship, weapon, Target.newFromShip(enemy)));
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}
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/**
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* Produce random moves inside arena cell
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*/
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static produceRandomMoves(ship: Ship, battle: Battle, cells = 10, iterations = 1, random = RandomGenerator.global): TacticalProducer {
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let engines = ifilter(getPlayableActions(ship), action => action instanceof MoveAction);
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return ichainit(imap(irange(iterations), iteration => {
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let moves = icombine(engines, TacticalAIHelpers.scanArena(battle, cells, random));
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return imap(moves, ([engine, target]) => new Maneuver(ship, engine, target));
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}));
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}
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/**
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* Produce blast weapon shots, with multiple targets.
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*/
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static produceInterestingBlastShots(ship: Ship, battle: Battle): TacticalProducer {
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// TODO Work with groups of 3, 4 ...
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let weapons = ifilter(ifilterclass(getPlayableActions(ship), TriggerAction), action => action.blast > 0);
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let enemies = battle.ienemies(ship, true);
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// TODO This produces duplicates (x, y) and (y, x)
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let couples = ifilter(icombine(enemies, enemies), ([e1, e2]) => e1 != e2);
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let candidates = ifilter(icombine(weapons, couples), ([weapon, [e1, e2]]) => Target.newFromShip(e1).getDistanceTo(Target.newFromShip(e2)) < weapon.blast * 2);
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let result = imap(candidates, ([weapon, [e1, e2]]) => new Maneuver(ship, weapon, Target.newFromLocation((e1.arena_x + e2.arena_x) / 2, (e1.arena_y + e2.arena_y) / 2)));
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return result;
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}
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/**
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* Produce random blast weapon shots, on a grid.
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*/
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static produceRandomBlastShots(ship: Ship, battle: Battle): TacticalProducer {
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let weapons = ifilter(getPlayableActions(ship), action => action instanceof TriggerAction && action.blast > 0);
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let candidates = ifilter(icombine(weapons, TacticalAIHelpers.scanArena(battle)), ([weapon, location]) => (<TriggerAction>weapon).getEffects(ship, location).length > 0);
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let result = imap(candidates, ([weapon, location]) => new Maneuver(ship, weapon, location));
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return result;
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}
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/**
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* Produce interesting then random blast shots
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*/
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static produceBlastShots(ship: Ship, battle: Battle): TacticalProducer {
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return ichain(TacticalAIHelpers.produceInterestingBlastShots(ship, battle), TacticalAIHelpers.produceRandomBlastShots(ship, battle));
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}
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/**
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* Produce toggle actions at random locations.
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*/
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static produceToggleActions(ship: Ship, battle: Battle): TacticalProducer {
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let toggles = ifilter(getPlayableActions(ship), action => action instanceof ToggleAction);
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let self_toggles = ifilter(toggles, toggle => contains([ActionTargettingMode.SELF_CONFIRM, ActionTargettingMode.SELF], toggle.getTargettingMode(ship)));
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let self_maneuvers = imap(self_toggles, toggle => new Maneuver(ship, toggle, Target.newFromShip(ship)));
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let distant_toggles = ifilter(toggles, toggle => contains([ActionTargettingMode.SPACE, ActionTargettingMode.SURROUNDINGS], toggle.getTargettingMode(ship)));
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let grid = TacticalAIHelpers.scanArena(battle);
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let distant_maneuvers = imap(icombine(grid, distant_toggles), ([location, toggle]) => new Maneuver(ship, toggle, location));
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return ichain(self_maneuvers, distant_maneuvers);
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}
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/**
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* Evaluate the number of turns necessary for the maneuver, between -1 and 1
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*/
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static evaluateTurnCost(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let powerusage = maneuver.simulation.total_move_ap + maneuver.simulation.total_fire_ap;
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if (powerusage == 0) {
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return -1;
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} else if (maneuver.simulation.total_fire_ap > ship.getAttribute("power_capacity")) {
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return -Infinity;
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} else if (powerusage > ship.getValue("power")) {
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return -1;
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} else {
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return (ship.getValue("power") - powerusage) / ship.getAttribute("power_capacity");
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}
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}
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/**
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* Evaluate doing nothing, between -1 and 1
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*/
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static evaluateIdling(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let power_capacity = ship.getAttribute("power_capacity") || 1;
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if (maneuver.action instanceof EndTurnAction) {
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return -ship.getValue("power") / power_capacity;
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} else if (maneuver.action instanceof TriggerAction) {
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return 0.5;
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} else if (maneuver.action instanceof ToggleAction) {
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return ship.actions.isToggled(maneuver.action) ? -0.2 : 0.5;
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} else if (maneuver.action instanceof MoveAction) {
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return -(ship.getValue("power") - maneuver.getPowerUsage()) / power_capacity;
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} else {
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return 0;
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}
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}
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/**
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* Evaluate the effect on health for a group of ships
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*/
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static evaluateHealthEffect(maneuver: Maneuver, ships: Ship[]): number {
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if (ships.length) {
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let diffs = ships.map(ship => getProportionalHealth(maneuver, ship));
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let deaths = sum(diffs.map(i => i == -1 ? 1 : 0));
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return ((sum(diffs) * 0.5) - (deaths * 0.5)) / ships.length;
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} else {
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return 0;
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}
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}
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/**
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* Evaluate the effect on health to the enemy, between -1 and 1
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*/
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static evaluateEnemyHealth(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let enemies = imaterialize(battle.ienemies(ship, true));
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return -TacticalAIHelpers.evaluateHealthEffect(maneuver, enemies);
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}
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/**
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* Evaluate the effect on health to allied ships, between -1 and 1
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*/
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static evaluateAllyHealth(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let allies = imaterialize(battle.iallies(ship, true));
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return TacticalAIHelpers.evaluateHealthEffect(maneuver, allies);
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}
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/**
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* Evaluate the clustering of ships, between -1 and 1
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*/
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static evaluateClustering(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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// TODO Take into account blast radius of in-play weapons
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let move_location = maneuver.getFinalLocation();
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let distances = imaterialize(imap(ifilter(battle.iships(), iship => iship != ship), iship => Target.newFromShip(iship).getDistanceTo(move_location)));
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if (distances.length == 0) {
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return 0;
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} else {
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let factor = max([battle.width, battle.height]) * 0.01;
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let result = -clamp(sum(distances.map(distance => factor / distance)), 0, 1);
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return result;
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}
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}
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/**
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* Evaluate the global positioning of a ship on the arena, between -1 and 1
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*/
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static evaluatePosition(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let pos = maneuver.getFinalLocation();
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let distance = min([pos.x, pos.y, battle.width - pos.x, battle.height - pos.y]);
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let factor = min([battle.width / 2, battle.height / 2]);
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return -1 + 2 * distance / factor;
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}
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/**
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* Evaluate the cost of overheating an equipment
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*/
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static evaluateOverheat(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let cooldown = ship.actions.getCooldown(maneuver.action);
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if (cooldown.willOverheat()) {
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return -Math.min(1, 0.4 * cooldown.cooling);
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} else {
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return 0;
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}
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}
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/**
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* Evaluate the gain or loss of active effects
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*/
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static evaluateActiveEffects(ship: Ship, battle: Battle, maneuver: Maneuver): number {
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let result = 0;
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maneuver.effects.forEach(effect => {
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if (effect instanceof ShipEffectAddedDiff || effect instanceof ShipEffectRemovedDiff) {
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let target = battle.getShip(effect.ship_id);
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let enemy = target && !target.isPlayedBy(ship.getPlayer());
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let beneficial = effect.effect.isBeneficial();
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if (effect instanceof ShipEffectRemovedDiff) {
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beneficial = !beneficial;
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}
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// TODO Evaluate the "power" of the effect
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if ((beneficial && !enemy) || (!beneficial && enemy)) {
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result += 1;
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} else {
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result -= 1;
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}
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}
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});
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return clamp(result / battle.ships.count(), -1, 1);
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}
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}
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} |