canvas实现可调参数的dna序列旋转动画效果代码-html代码-BFW代码库

canvas实现可调参数的dna序列旋转动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现可调参数的dna序列旋转动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en" >

<head>

  <meta charset="UTF-8">
  

  
  
  
<style>
html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
}
canvas {
  max-width: 100%;
}
</style>



</head>

<body >
  <canvas id="myCanvas"></canvas>

<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/dat.gui-min.js"></script>
      <script  >
// Environment Variables
let updateFPS = 30;
let showMouse = true;
let count = 0;
let bgColor = "black";

// Controls
const controls = {
  frequency: 0.02,
  amplitude: 30,
  noise: 30 };

const gui = new dat.GUI();
gui.add(controls, "frequency", 0, 1).step(0.01);
gui.add(controls, "amplitude", 0, 30).step(0.01);
gui.add(controls, "noise", 0, 150).step(0.01);

//------ Vector 2D -------
class Vec2 {
  constructor(x, y) {
    this.x = x || 0;
    this.y = y || 0;
  }
  set(x, y) {
    this.x = x;
    this.y = y;
  }
  move(x, y) {
    this.x += x;
    this.y += y;
  }
  add(value) {
    return new Vec2(this.x + value.x, this.y + value.y);
  }
  sub(value) {
    return new Vec2(this.x - value.x, this.y - value.y);
  }
  mul(number) {
    return new Vec2(this.x * number, this.y * number);
  }
  get length() {
    return Math.sqrt(this.x * this.x + this.y * this.y);
  }
  set length(newValue) {
    let temp = this.unit.mul(newValue);
    this.set(temp.x, temp.y);
  }
  clone() {
    return new Vec2(this.x, this.y);
  }
  toString() {
    return `(${this.x}, ${this.y})`;
  }
  equal(compareElement) {
    return this.x == compareElement.x && this.y == compareElement.y;
  }
  get angle() {
    return Math.atan2(this.y, this.x);
  }
  get unit() {
    return this.mul(1 / this.length);
  }}


//--- Canvas Selector ----
const canvas = document.querySelector("#myCanvas");
const ctx = canvas.getContext("2d");

ctx.circle = function (value, radius) {
  this.arc(value.x, value.y, radius, 0, Math.PI * 2);
};
ctx.line = function (value1, value2) {
  this.moveTo(value1.x, value1.y);
  this.lineTo(value2.x, value2.y);
};

// Set Canvas
initCanvas();
function initCanvas() {
  ww = canvas.width = window.innerWidth;
  wh = canvas.height = window.innerHeight;
}

// Set Logic
function init() {}

// Update Game Logic
function update() {}

// Update Frame
function draw() {
  count++;
  // Clear Background
  ctx.fillStyle = bgColor;
  ctx.fillRect(0, 0, ww, wh);
  //------ Draw Here --------
  ctx.beginPath();
  for (let i = 0; i < ww; i++) {
    let deg = i * controls.frequency + count / 24;
    let noise = .........完整代码请登录后点击上方下载按钮下载查看