TypeScript seedrandom类代码示例

  protected multinomialInternal(
      probabilities: Array1D, numSamples: number, seed: number): Array1D {
    const probVals = probabilities.getValues();

    // The cdf won't include the last event. It will be implicit if not other
    // event happened.
    const cdf = new Float32Array(probabilities.size - 1);
    cdf[0] = probVals[0];
    for (let event = 1; event < cdf.length; ++event) {
      cdf[event] = cdf[event - 1] + probVals[event];
    }

    const random = seedrandom(seed.toString());
    const res = new Float32Array(numSamples);

    for (let i = 0; i < numSamples; ++i) {
      const r = random();

      // Assume last event happened by default.
      res[i] = cdf.length;

      for (let event = 0; event < cdf.length; event++) {
        if (r < cdf[event]) {
          res[i] = event;
          break;
        }
      }
    }

    return Array1D.new(res);
  }

const _ = (seed: string) => {
	// Init randomizer
	const random = seedrandom(seed);

	const r = Math.floor(random() * 255);
	const g = Math.floor(random() * 255);
	const b = Math.floor(random() * 255);

	return new Color(r, g, b);
};

    constructor(options: ILevelGeneratorOptions) {
        if (options.seed) {
            seedrandom(options.seed, { global: true});
        }

        this.width = options.width || 25;
        this.height = options.height || 25;
        this.roomAttempts = options.roomAttempts || 50;
        this.maxSize = options.maxSize || 8;
        this.minSize = options.minSize || 5;
        this.windyness = options.windyness || 100;
        this.wallWidth = options.wallWidth || 1;
        this.mazeWidth = options.mazeWidth || 2;
        this.minDoors = options.minDoors || 1;
        this.maxDoors = options.maxDoors || 4;
        this.animate = options.animate || false;
        this.animationDelay = options.animationDelay || 10;
    }

import * as seedrandom from 'seedrandom';

// ------------------------------------------------------------
// Preparatory Steps
// ------------------------------------------------------------

let randomNumberGenerator: () => number;

// ------------------------------------------------------------
// randomUniform
// ------------------------------------------------------------

let prngUniform: d3Random.RandomUniform;

prngUniform = d3Random.randomUniform;
prngUniform = d3Random.randomUniform.source(seedrandom("Schroedinger's flea."));

randomNumberGenerator = prngUniform();
randomNumberGenerator = prngUniform(0.2);
randomNumberGenerator = prngUniform(0.2, 5);

// ------------------------------------------------------------
// randomNormal
// ------------------------------------------------------------

let prngNormal: d3Random.RandomNormal;

prngNormal = d3Random.randomNormal;
prngNormal = d3Random.randomNormal.source(seedrandom("Schroedinger's flea."));

randomNumberGenerator = prngNormal();