hevi1991

import React, { useReducer } from "react";
import ReactDOM from "react-dom";

const initialState = {
  items: [],
  total: 0
};

const actions = {
  ADD_ITEM: "ADD_ITEM",

hevi1991

import React, { createContext, useContext, useState } from "react";
import ReactDOM from "react-dom";

// 创建一个Context对象
const ExampleContext = createContext();

// 创建一个自定义的Provider组件
function ExampleProvider({ children }) {
  // 使用useState Hook创建一个状态
  const [value, setValue] = useState("Initial Value");

hevi1991

// https://www.zhihu.com/question/650059927

function highestComboTest(target = 12) {

  let combo = 0;
  let comboArr = [];
  let testCount = 10000;

  for (let i = 0; i < testCount; i++) {
    if (Math.random() >= 0.5) {

hevi1991

export function singleton(clazz) {
  let instance;

  return new Proxy(clazz, {
    construct(target, args) {
      if (instance) {
        return instance;
      } else {
        instance = new target(...args);
        return instance;

hevi1991

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);
	return mix(rand(fl), rand(fl + 1.0), fc);
}

hevi1991

//	Classic Perlin 3D Noise 
//	by Stefan Gustavson
//
vec4 permute(vec4 x){return mod(((x*34.0)+1.0)*x, 289.0);}
vec4 taylorInvSqrt(vec4 r){return 1.79284291400159 - 0.85373472095314 * r;}
vec3 fade(vec3 t) {return t*t*t*(t*(t*6.0-15.0)+10.0);}

float cnoise(vec3 P){
  vec3 Pi0 = floor(P); // Integer part for indexing
  vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1