243 lines
9.5 KiB
TypeScript
243 lines
9.5 KiB
TypeScript
module TS.SpaceTac.UI {
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// Particle that is rotated to always face its ongoing direction
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class BulletParticle extends Phaser.Particle {
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update(): void {
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super.update();
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this.rotation = Math.atan2(this.body.velocity.y, this.body.velocity.x);
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}
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}
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/**
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* Visual effects renderer for weapons.
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*/
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export class WeaponEffect {
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// Link to game
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private ui: MainUI
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// Link to arena
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private arena: Arena
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private view: BattleView
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// Timer to use
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private timer: Timer
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// Display group in which to display the visual effects
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private layer: Phaser.Group
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// Firing ship
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private ship: Ship
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private source: IArenaLocation
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// Target (ship or space)
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private target: Target
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private destination: IArenaLocation
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// Weapon used
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private weapon: Equipment
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// Effect in use
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private effect: Function
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constructor(arena: Arena, ship: Ship, target: Target, weapon: Equipment) {
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this.ui = arena.game;
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this.arena = arena;
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this.view = arena.view;
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this.timer = arena.view.timer;
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this.layer = arena.layer_weapon_effects;
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this.ship = ship;
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this.target = target;
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this.weapon = weapon;
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this.effect = this.getEffectForWeapon(weapon.code);
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this.source = this.getCoords(Target.newFromShip(this.ship));
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this.destination = this.getCoords(this.target);
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}
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/**
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* Start the visual effect
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*
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* Returns the duration of the effect.
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*/
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start(): number {
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if (this.effect) {
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return this.effect();
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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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* Get the location of a target (as of current view, not as actual game state)
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*/
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getCoords(target: Target): IArenaLocation {
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if (target.ship) {
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let sprite = this.arena.findShipSprite(target.ship);
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if (sprite) {
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return sprite;
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} else {
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return target.ship.location;
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}
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} else {
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return target;
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}
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}
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/**
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* Get the function that will be called to start the visual effect
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*/
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getEffectForWeapon(weapon: string): Function {
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switch (weapon) {
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case "gatlinggun":
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return this.gunEffect.bind(this);
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default:
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return this.defaultEffect.bind(this);
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}
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}
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/**
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* Add a shield impact effect on a ship
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*/
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shieldImpactEffect(from: IArenaLocation, ship: IArenaLocation, delay: number, duration: number, particles = false) {
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let angle = Math.atan2(from.y - ship.y, from.x - ship.x);
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let effect = this.view.newImage("battle-effects-shield-impact", ship.x, ship.y);
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effect.alpha = 0;
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effect.rotation = angle;
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effect.anchor.set(0.5, 0.5);
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this.layer.add(effect);
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let tween1 = this.ui.add.tween(effect).to({ alpha: 1 }, 100).delay(delay);
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let tween2 = this.ui.add.tween(effect).to({ alpha: 0 }, 100).delay(duration);
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tween1.chain(tween2);
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tween2.onComplete.addOnce(() => effect.destroy());
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tween1.start();
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if (particles) {
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let image = this.view.getImageInfo("battle-effects-hot");
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let emitter = this.ui.add.emitter(ship.x + Math.cos(angle) * 35, ship.y + Math.sin(angle) * 35, 30);
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emitter.minParticleScale = 0.7;
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emitter.maxParticleScale = 1.2;
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emitter.gravity = 0;
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emitter.makeParticles(image.key, image.frame);
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emitter.setSize(10, 10);
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emitter.setRotation(0, 0);
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emitter.setXSpeed(-Math.cos(angle) * 20, -Math.cos(angle) * 80);
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emitter.setYSpeed(-Math.sin(angle) * 20, -Math.sin(angle) * 80);
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this.timer.schedule(delay, () => emitter.start(false, 200, 30, duration * 0.8 / 30));
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this.layer.add(emitter);
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this.timer.schedule(delay + duration + 5000, () => emitter.destroy());
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}
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}
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/**
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* Add a hull impact effect on a ship
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*/
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hullImpactEffect(from: IArenaLocation, ship: IArenaLocation, delay: number, duration: number) {
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let angle = Math.atan2(from.y - ship.y, from.x - ship.x);
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let image = this.view.getImageInfo("battle-effects-hot");
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let emitter = this.ui.add.emitter(ship.x + Math.cos(angle) * 10, ship.y + Math.sin(angle) * 10, 30);
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emitter.minParticleScale = 1.0;
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emitter.maxParticleScale = 2.0;
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emitter.gravity = 0;
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emitter.makeParticles(image.key, image.frame);
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emitter.setSize(15, 15);
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emitter.setRotation(0, 0);
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emitter.setXSpeed(-Math.cos(angle) * 120, -Math.cos(angle) * 260);
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emitter.setYSpeed(-Math.sin(angle) * 120, -Math.sin(angle) * 260);
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this.timer.schedule(delay, () => emitter.start(false, 200, 30, duration * 0.8 / 30));
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this.layer.add(emitter);
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this.timer.schedule(delay + duration + 5000, () => emitter.destroy());
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}
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/**
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* Default firing effect
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*/
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defaultEffect(): number {
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this.ui.audio.playOnce("battle-weapon-missile-launch");
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let missile = this.view.newImage("battle-effects-default", this.source.x, this.source.y);
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missile.anchor.set(0.5, 0.5);
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missile.rotation = arenaAngle(this.source, this.destination);
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this.layer.add(missile);
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let blast_radius = this.weapon.action ? this.weapon.action.getBlastRadius(this.ship) : 0;
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let projectile_duration = arenaDistance(this.source, this.destination) * 1.5;
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let tween = this.ui.tweens.create(missile);
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tween.to({ x: this.destination.x, y: this.destination.y }, projectile_duration || 1);
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tween.onComplete.addOnce(() => {
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missile.destroy();
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if (blast_radius > 0) {
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this.ui.audio.playOnce("battle-weapon-missile-explosion");
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let blast = this.view.newImage("battle-effects-blast", this.destination.x, this.destination.y);
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let scaling = blast_radius * 2 / (blast.width * 0.9);
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blast.anchor.set(0.5, 0.5);
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blast.scale.set(0.001, 0.001);
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let tween1 = this.ui.tweens.create(blast.scale).to({ x: scaling, y: scaling }, 1500, Phaser.Easing.Quintic.Out);
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tween1.onComplete.addOnce(() => blast.destroy());
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tween1.start();
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let tween2 = this.ui.tweens.create(blast).to({ alpha: 0 }, 1450, Phaser.Easing.Quadratic.In);
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tween2.start();
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this.layer.add(blast);
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}
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});
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tween.start();
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if (blast_radius > 0 && this.weapon.action instanceof FireWeaponAction) {
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if (any(this.weapon.action.effects, effect => effect instanceof DamageEffect)) {
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let ships = this.arena.getShipsInCircle(new ArenaCircleArea(this.destination.x, this.destination.y, blast_radius));
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ships.forEach(sprite => {
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if (sprite.getValue("shield") > 0) {
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this.shieldImpactEffect(this.target, sprite, 1200, 800);
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} else {
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this.hullImpactEffect(this.target, sprite, 1200, 400);
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}
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});
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}
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}
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return projectile_duration + (blast_radius ? 1500 : 0);
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}
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/**
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* Submachine gun effect (quick chain of small bullets)
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*/
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gunEffect(): number {
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this.ui.audio.playOnce("battle-weapon-bullets");
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let sprite = this.target.ship ? this.arena.findShipSprite(this.target.ship) : null;
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let has_shield = sprite && sprite.getValue("shield") > 0;
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let angle = arenaAngle(this.source, this.target);
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let distance = arenaDistance(this.source, this.target);
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let image = this.view.getImageInfo("battle-effects-bullets");
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let emitter = this.ui.add.emitter(this.source.x + Math.cos(angle) * 35, this.source.y + Math.sin(angle) * 35, 10);
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let speed = 2000;
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emitter.particleClass = BulletParticle;
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emitter.gravity = 0;
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emitter.setSize(5, 5);
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emitter.setRotation(0, 0);
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emitter.setXSpeed(Math.cos(angle) * speed, Math.cos(angle) * speed);
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emitter.setYSpeed(Math.sin(angle) * speed, Math.sin(angle) * speed);
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emitter.makeParticles(image.key, image.frame);
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let guard = 50 + (has_shield ? 80 : 40);
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if (guard + 1 > distance) {
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guard = distance - 1;
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}
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emitter.start(false, 1000 * (distance - guard) / speed, 50, 10);
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this.layer.add(emitter);
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this.timer.schedule(5000, () => emitter.destroy());
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if (has_shield) {
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this.shieldImpactEffect(this.source, this.target, 100, 800, true);
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} else {
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this.hullImpactEffect(this.source, this.target, 100, 800);
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}
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return 1000;
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}
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}
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}
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