66 lines
2.2 KiB
JavaScript
66 lines
2.2 KiB
JavaScript
const PRNG = require('./prng');
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const Planet = require('./planet');
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const utils = require('./utils');
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const data = require('./data.json');
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function Star(name, seed, position) {
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var pseudoRandom = new PRNG(seed),
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spectralClass = pseudoRandom.pick(["black hole", "O", "B", "A", "F", "G", "K", "M"], [.5, 0.0001, 0.2, 1, 3, 8, 12, 20]),
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spectralIndex = pseudoRandom.range(0, 9),
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stellarTemplate = data.starTypes[spectralClass];
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this.name = name;
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this.seed = seed;
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this.position = position;
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if (spectralClass != 'black hole')
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this.spectralType = spectralClass + spectralIndex;
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else
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this.spectralType = spectralClass;
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this.luminosity = stellarTemplate.luminosity * (4 / (spectralIndex + 2)) * 50;
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this.radius = Math.sqrt(this.luminosity);
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this.numberOfPlanets = pseudoRandom.range(stellarTemplate.planets[0], stellarTemplate.planets[1]);
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this.numberOfStations = pseudoRandom.range(0, this.numberOfPlanets / 20);
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this.planetSeed = pseudoRandom.range(0, 1000000);
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this.color = stellarTemplate.color;
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this.planets = this.generatePlanets();
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return this;
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}
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Star.prototype.generatePlanets = function () {
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var planets = [],
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pseudoRandom = new PRNG(this.planetSeed),
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radius_min = 0.4 * pseudoRandom.realRange(0.5, 2),
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radius_max = 50 * pseudoRandom.realRange(0.5, 2),
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total_weight = (Math.pow(this.numberOfPlanets, 2) + this.numberOfPlanets) * 0.5,
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r = radius_min
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for (var i = 0; i < this.numberOfPlanets; i++) {
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r += i / total_weight * pseudoRandom.realRange(0.5, 1) * (radius_max - radius_min);
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planets.push(new Planet(utils.kappatalize(this.name) + "-" + utils.romanNumeral(i + 1), pseudoRandom.range(0, 1000000), r, this.luminosity / Math.pow(r, 2)));
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}
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this.divideStations(planets, this.seed);
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return planets;
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}
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Star.prototype.divideStations = function (planets, seed) {
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var stations = this.numberOfStations || 0;
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var i = planets.length - 1;
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var pseudoRandom = new PRNG(seed);
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for (i = 0; i < stations; i++) {
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var arr = []
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for (planet of planets) {
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arr.push(100 / planets.length);
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}
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var planet = pseudoRandom.pick(planets, arr);
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planet.station = planet.generateStation(pseudoRandom);
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planet.station.seed = planet.seed;
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}
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}
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module.exports = Star;
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