Add start of ship rendering

js/world/body.mjs

@@ -0,0 +1,26 @@
+import {GRAVITATIONAL_CONSTANT as G} from '../consts.mjs';
+
+export default class Body {
+	constructor(x, y, mass) {
+		this.x = x;
+		this.y = y;
+		this.r = 0;
+		this.xvel = 0;
+		this.yvel = 0;
+		this.rvel = 0;
+		this.mass = mass;
+	}
+	
+	tickGravity(bodies) {
+		bodies.forEach(b => {
+			let force = b.mass / this.mass / (distanceTo(b) ** 2) * G;
+			let angle = Math.atan2(b.y - this.y, b.x - this.x);
+			this.xvel += Math.cos(angle) * force;
+			this.yvel += Math.sin(angle) * force;
+		});
+	}
+
+	distanceTo(body) {
+		return Math.sqrt(((body.x - this.x) ** 2) + ((body.y - this.y) ** 2));
+	}
+}

js/world/celestial.mjs

@@ -0,0 +1,10 @@
+import Body from './body.mjs';
+
+export default class Celestial extends Body {
+	constructor(x, y, radius, {
+		density = 1,
+		mass = (radius ** 2) * density
+	}) {
+		super(x, y, mass);
+	}
+}

js/world/index.mjs

@@ -1,3 +1,26 @@
 import * as sector from './sector.mjs';
+import * as spawn from './spawn.mjs';
 
 export {getSectorFromWorld, getContainedSectors} from './sector.mjs';
+
+export const entities = new Set();
+export const celestials = new Set();
+export const ships = new Set();
+
+export let playerShip = null;
+
+export function setPlayerShip(ship) {
+	playerShip = ship;
+}
+
+export function init() {
+	entities.clear();
+	celestials.clear();
+	spawn.player();
+}
+
+export function tick() {
+	celestials.forEach(c => c.tick());
+	entities.forEach(e => e.tick());
+	ships.forEach(s => s.tick());
+}

js/world/module.mjs

@@ -0,0 +1,15 @@
+export default class Module {
+	constructor(x, y, {
+		name = 'Unnamed Module',
+		type = 'block',
+		mass = 1,
+		...properties
+	}) {
+		this.x = x;
+		this.y = y;
+		this.name = name;
+		this.type = type;
+		this.mass = mass;
+
+	}
+}

js/world/ship.mjs

@@ -0,0 +1,35 @@
+import Module from './module.mjs';
+import Body from './body.mjs';
+
+export default class Ship extends Body {
+	constructor(x, y) {
+		super(x, y, 0);
+
+		this.com = [0, 0];
+		this.modules = new Set();
+	}
+
+	tick() {
+
+	}
+
+	addModule(x, y, properties, options) {
+		let module = new Module(x, y, {...properties, ...options});
+		this.modules.add(module);
+		this.refreshShape();
+	}
+
+	deleteModule(module) {
+		this.modules.delete(module);
+		this.refreshShape();
+	}
+
+	refreshShape() {
+		let points = [];
+		this.modules.forEach(m => points.push([m.x, m.y, m.mass]));
+		this.mass = points.reduce((a, [,,b]) => a + b, 0);
+		this.com = points.reduce(([ax, ay], b) =>
+			[ax + b.x * b.mass, ay + b.y * b.mass], [0, 0])
+			.map(x => x / this.mass);
+	}
+}

js/world/spawn.mjs

@@ -0,0 +1,13 @@
+import Ship from './ship.mjs';
+import Module from './module.mjs';
+import {modules} from '../data.mjs';
+import * as world from './index.mjs';
+
+export function player() {
+	let ship = new Ship(0, 0);
+	ship.addModule(0, 0, modules.capsule.small);
+	ship.addModule(0, 1, modules.fuel.small, { filled: true });
+	ship.addModule(0, 2, modules.thruster.light);
+	world.ships.add(ship);
+	world.setPlayerShip(ship);
+}