81 lines
1.8 KiB
JavaScript
81 lines
1.8 KiB
JavaScript
'use strict';
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const Asteroid = require('./body/asteroid.js');
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const Grapple = require('./body/projectile/grapple.js');
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const Missile = require('./body/projectile/missile.js');
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const Laser = require('./body/turret/discharge/laser.js');
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class Spawner {
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constructor(world) {
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this.world = world;
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}
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spawnAsteroid(x, y, size) {
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let pos = {
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x: x,
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y: y
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};
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let asteroid = new Asteroid(this.world, pos, size);
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this.world.addAsteroid(asteroid);
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}
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spawnMissile(ship) {
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let r = ship.pos.r;
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let ox = Math.cos(r) * 0.7;
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let oy = Math.sin(r) * 0.7;
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let pos = {
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x: ship.center.x + ox,
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y: ship.center.y + oy,
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r: r,
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xvel: ship.vel.x,
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yvel: ship.vel.y
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};
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let missile = new Missile(this.world, pos, ship);
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this.world.addProjectile(missile);
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return missile;
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}
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spawnGrapple(fixture, x, y) {
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let fixturePos = fixture.body.getWorldPos(fixture.mount.pos);
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let fx = fixturePos.x;
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let fy = fixturePos.y;
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let dx = x - fx;
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let dy = y - fy;
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let a = Math.atan2(dy, dx);
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let pos = {
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x: fx + Math.cos(a) * 1,
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y: fy + Math.sin(a) * 1,
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r: a,
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xvel: fixture.body.vel.x,
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yvel: fixture.body.vel.y
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};
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let grapple = new Grapple(this.world, pos, fixture.body);
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this.world.addProjectile(grapple);
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return grapple;
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}
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spawnLaser(fixture) {
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let r = fixture.angle;
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let a = fixture.body.pos.r + fixture.angle;
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let fixturePos = fixture.mount.pos;
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let f = {
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x: fixturePos.x + Math.cos(r) * 0.3,
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y: fixturePos.y + Math.sin(r) * 0.3
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};
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let vx = Math.cos(a) * 0.5;
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let vy = Math.sin(a) * 0.5;
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let spawnPos = fixture.body.getWorldPos(f);
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let pos = {
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x: spawnPos.x,
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y: spawnPos.y,
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r: r,
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xvel: fixture.body.vel.x + vx,
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yvel: fixture.body.vel.y + vy
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};
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let laser = new Laser(fixture, pos);
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this.world.addDischarge(laser);
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return laser;
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}
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}
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module.exports = Spawner;
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