89 lines
2.7 KiB
TypeScript
89 lines
2.7 KiB
TypeScript
module TK.SpaceTac {
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// Target for a capability
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// This could be a location in space, or a ship
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export class Target {
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// Coordinates of the target
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x: number
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y: number
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// If the target is a ship, this attribute will be set
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ship_id: RObjectId | null
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// Standard constructor
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constructor(x: number, y: number, ship: Ship | null = null) {
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this.x = x;
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this.y = y;
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this.ship_id = ship ? ship.id : null;
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}
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jasmineToString() {
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if (this.ship_id) {
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return `(${this.x},${this.y}) ship_id=${this.ship_id}}`;
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} else {
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return `(${this.x},${this.y})`;
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}
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}
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// Constructor to target a single ship
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static newFromShip(ship: Ship): Target {
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return new Target(ship.arena_x, ship.arena_y, ship);
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}
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// Constructor to target a location in space
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static newFromLocation(x: number, y: number): Target {
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return new Target(x, y, null);
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}
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/**
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* Snap to battle grid
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*/
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snap(grid: IArenaGrid): Target {
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if (this.ship_id) {
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return this;
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} else {
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let location = grid.snap(this);
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return Target.newFromLocation(location.x, location.y);
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}
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}
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// Get distance to another target
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getDistanceTo(other: { x: number, y: number }): number {
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var dx = other.x - this.x;
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var dy = other.y - this.y;
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return Math.sqrt(dx * dx + dy * dy);
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}
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// Get the normalized angle, in radians, to another target
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getAngleTo(other: { x: number, y: number }): number {
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var dx = other.x - this.x;
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var dy = other.y - this.y;
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return Math.atan2(dy, dx);
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}
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/**
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* Returns true if the target is a ship
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*
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* If a ship or ship id is passed, also check that it is the targetted one
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*/
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isShip(ship?: Ship | RObject): boolean {
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return this.ship_id !== null && (typeof ship == "undefined" || rid(ship) == this.ship_id);
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}
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/**
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* Get the targetted ship in a battle
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*/
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getShip(battle: Battle): Ship | null {
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if (this.isShip()) {
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return battle.getShip(this.ship_id);
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} else {
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return null;
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}
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}
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// Check if a target is in range from a specific point
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isInRange(x: number, y: number, radius: number): boolean {
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return arenaInRange(this, new ArenaLocation(x, y), radius);
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}
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}
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}
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