321 lines
11 KiB
TypeScript
321 lines
11 KiB
TypeScript
module TS.SpaceTac {
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// A turn-based battle between fleets
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export class Battle {
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// Flag indicating if the battle is ended
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ended: boolean;
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// Battle outcome, if *ended* is true
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outcome: BattleOutcome;
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// Log of all battle events
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log: BattleLog;
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// List of fleets engaged in battle
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fleets: Fleet[];
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// List of ships, sorted by their initiative throw
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play_order: Ship[];
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// Current turn
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turn: number;
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// Current ship whose turn it is to play
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playing_ship_index: number | null;
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playing_ship: Ship | null;
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// List of deployed drones
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drones: Drone[] = [];
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// Size of the battle area
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width: number
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height: number
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// Timer to use for scheduled things
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timer = Timer.global;
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// Create a battle between two fleets
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constructor(fleet1 = new Fleet(), fleet2 = new Fleet(), width = 1780, height = 948) {
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this.log = new BattleLog();
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this.fleets = [fleet1, fleet2];
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this.play_order = [];
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this.playing_ship_index = null;
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this.playing_ship = null;
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this.ended = false;
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this.width = width;
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this.height = height;
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this.fleets.forEach((fleet: Fleet) => {
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fleet.setBattle(this);
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});
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}
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// Create a quick random battle, for testing purposes
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static newQuickRandom(start = true, level = 1, shipcount = 5): Battle {
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var player1 = Player.newQuickRandom("John", level, shipcount, true);
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var player2 = Player.newQuickRandom("Carl", level, shipcount, true);
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var result = new Battle(player1.fleet, player2.fleet);
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if (start) {
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result.start();
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}
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return result;
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}
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/**
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* Return an iterator over all ships engaged in the battle
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*/
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iships(): Iterator<Ship> {
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return ichainit(imap(iarray(this.fleets), fleet => iarray(fleet.ships)));
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}
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/**
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* Return an iterator over ships enemy of a player
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*/
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ienemies(player: Player, alive_only = false): Iterator<Ship> {
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return ifilter(this.iships(), ship => ship.getPlayer() != player && (ship.alive || !alive_only));
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}
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// Check if a player is able to play
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// This can be used by the UI to determine if player interaction is allowed
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canPlay(player: Player): boolean {
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if (this.ended) {
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return false;
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} else if (this.playing_ship && this.playing_ship.getPlayer() == player) {
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return this.playing_ship.isAbleToPlay(false);
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} else {
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return false;
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}
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}
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// Create play order, performing an initiative throw
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throwInitiative(gen: RandomGenerator = new RandomGenerator()): void {
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var play_order: Ship[] = [];
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// Throw each ship's initiative
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this.fleets.forEach(function (fleet: Fleet) {
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fleet.ships.forEach(function (ship: Ship) {
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ship.throwInitiative(gen);
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play_order.push(ship);
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});
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});
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// Sort by throw result
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play_order.sort(function (ship1: Ship, ship2: Ship) {
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return (ship2.play_priority - ship1.play_priority);
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});
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this.play_order = play_order;
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}
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// Defines the initial ship positions of all engaged fleets
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placeShips(): void {
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this.placeFleetShips(this.fleets[0], this.width * 0.05, this.height * 0.5, 0);
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this.placeFleetShips(this.fleets[1], this.width * 0.95, this.height * 0.5, Math.PI);
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}
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// Count the number of fleets still alive
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countAliveFleets(): number {
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var result = 0;
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this.fleets.forEach((fleet: Fleet) => {
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if (fleet.isAlive()) {
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result += 1;
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}
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});
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return result;
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}
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// Collect all ships within a given radius of a target
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collectShipsInCircle(center: Target, radius: number, alive_only = false): Ship[] {
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return imaterialize(ifilter(this.iships(), ship => (ship.alive || !alive_only) && Target.newFromShip(ship).getDistanceTo(center) <= radius));
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}
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/**
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* Ends a battle and sets the outcome
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*/
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endBattle(winner: Fleet | null, log = true) {
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this.ended = true;
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this.outcome = new BattleOutcome(winner);
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// Apply experience
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this.outcome.grantExperience(this.fleets);
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// Wear down equipment
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iforeach(this.iships(), ship => {
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ship.listEquipment().forEach(equipment => {
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equipment.addWear(this.turn);
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});
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});
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// Broadcast
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if (log && this.log) {
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this.log.add(new EndBattleEvent(this.outcome));
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}
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}
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// Checks end battle conditions, returns true if the battle ended
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checkEndBattle(log: boolean = true) {
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if (this.ended) {
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return true;
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}
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var alive_fleets = this.countAliveFleets();
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if (alive_fleets === 0) {
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// It's a draw
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this.endBattle(null, log);
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} else if (alive_fleets === 1) {
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// We have a winner
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var winner: Fleet | null = null;
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this.fleets.forEach((fleet: Fleet) => {
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if (fleet.isAlive()) {
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winner = fleet;
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}
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});
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this.endBattle(winner, log);
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}
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return this.ended;
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}
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// End the current ship turn, passing control to the next one in play order
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// If at the end of the play order, next turn will start automatically
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// Member 'play_order' must be defined before calling this function
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advanceToNextShip(log: boolean = true): void {
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var previous_ship = this.playing_ship;
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if (this.checkEndBattle(log)) {
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return;
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}
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if (this.playing_ship && this.playing_ship.playing) {
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this.playing_ship.endTurn();
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}
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if (this.play_order.length === 0) {
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this.playing_ship_index = null;
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this.playing_ship = null;
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} else {
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if (this.playing_ship_index == null) {
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this.playing_ship_index = 0;
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} else {
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this.playing_ship_index = (this.playing_ship_index + 1) % this.play_order.length;
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}
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this.playing_ship = this.play_order[this.playing_ship_index];
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}
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if (this.playing_ship) {
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if (this.playing_ship_index == 0) {
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this.turn += 1;
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}
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this.playing_ship.startTurn();
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}
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if (log && previous_ship && this.playing_ship) {
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this.log.add(new ShipChangeEvent(previous_ship, this.playing_ship));
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}
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}
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/**
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* Make an AI play the current ship
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*/
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playAI(ai: AbstractAI | null = null) {
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if (this.playing_ship) {
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if (!ai) {
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// TODO Use an AI adapted to the fleet
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ai = new TacticalAI(this.playing_ship, this.timer);
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}
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ai.play();
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}
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}
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// Start the battle
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// This will call all necessary initialization steps (initiative, placement...)
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// This will not add any event to the battle log
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start(): void {
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this.ended = false;
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this.turn = 0;
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this.placeShips();
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this.throwInitiative();
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iforeach(this.iships(), ship => ship.startBattle());
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this.advanceToNextShip();
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}
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// Force an injection of events in the battle log to simulate the initial state
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// For instance, this may be called after 'start', to use the log subscription system
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// to initialize a battle UI
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// Attributes 'play_order' and 'playing_ship' should be defined before calling this
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injectInitialEvents(): void {
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var log = this.log;
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// Simulate initial ship placement
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this.play_order.forEach(ship => {
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let event = new MoveEvent(ship, ship.arena_x, ship.arena_y);
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event.initial = true;
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log.add(event);
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});
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// Indicate emergency stasis
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this.play_order.forEach(ship => {
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if (!ship.alive) {
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let event = new DeathEvent(ship);
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event.initial = true;
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log.add(event);
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}
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});
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// Simulate drones deployment
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this.drones.forEach(drone => {
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let event = new DroneDeployedEvent(drone);
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event.initial = true;
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log.add(event);
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});
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// Simulate game turn
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if (this.playing_ship) {
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let event = new ShipChangeEvent(this.playing_ship, this.playing_ship);
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event.initial = true;
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log.add(event);
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}
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}
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// Defines the initial ship positions for one fleet
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// x and y are the center of the fleet placement
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// facing_angle is the forward angle in radians
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private placeFleetShips(fleet: Fleet, x: number, y: number, facing_angle: number): void {
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var side_angle = facing_angle + Math.PI * 0.5;
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var spacing = this.height * 0.2;
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var total_length = spacing * (fleet.ships.length - 1);
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var dx = Math.cos(side_angle);
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var dy = Math.sin(side_angle);
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x -= dx * total_length * 0.5;
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y -= dy * total_length * 0.5;
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for (var i = 0; i < fleet.ships.length; i++) {
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fleet.ships[i].setArenaPosition(x + i * dx * spacing, y + i * dy * spacing);
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fleet.ships[i].setArenaFacingAngle(facing_angle);
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}
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}
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/**
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* Add a drone to the battle
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*/
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addDrone(drone: Drone, log = true) {
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if (add(this.drones, drone)) {
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if (log) {
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this.log.add(new DroneDeployedEvent(drone));
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}
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drone.onDeploy(this.play_order);
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}
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}
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/**
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* Remove a drone from the battle
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*/
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removeDrone(drone: Drone, log = true) {
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if (remove(this.drones, drone)) {
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if (log) {
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this.log.add(new DroneDestroyedEvent(drone));
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}
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}
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}
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}
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}
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