打开全栈工匠技能包-1小时轻松掌握SSR
两小时精通jq+bs插件开发
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webpack的loader到底是什么样的？两小时带你写一个自己loader
开源分享：docs.qq.com/doc/DSmRnRG…
style.css
body{
margin: 0;
padding: 0;
overflow: hidden;
background: #2d9b95;
background: -moz-radial-gradient(center, ellipse cover, #2d9b95 0%, #0e1329 100%);
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,#2d9b95), color-stop(100%,#0e1329));
background: -webkit-radial-gradient(center, ellipse cover, #2d9b95 0%,#0e1329 100%);
background: -o-radial-gradient(center, ellipse cover, #2d9b95 0%,#0e1329 100%);
background: -ms-radial-gradient(center, ellipse cover, #2d9b95 0%,#0e1329 100%);
background: radial-gradient(ellipse at center, #2d9b95 0%,#0e1329 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#2d9b95', endColorstr='#0e1329',GradientType=1 );
}
index.js
window.requestAnimFrame = (function(){
return window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function( callback ){
window.setTimeout(callback, 1000 / 60);
};
})();
var canvas = document.getElementsByTagName("canvas")[0];
var ctx = canvas.getContext("2d");
var w = $(document).width();
var h = $(document).height();
canvas.width = w;
canvas.height = h;
var mols = [];
function init(){
for(var i=0;i<18;i++){
var mol = new generate_mol("C8H10N4O2");
mols.push(mol);
var mol = new generate_mol("C6H6O");
mols.push(mol);
var mol = new generate_mol("C6H6");
mols.push(mol);
}
}
function draw(){
canvas.width = canvas.width;
for(var i=0;i<mols.length;i++){
var m = mols[i];
m.x += m.vx;
if(m.x >= w-100 || m.x <= 0){
m.vx = -m.vx;
}
m.y += m.vy;
if(m.y >= h-100 || m.y <= 0){
m.vy = -m.vy;
}
m.r += 0.005;
m.draw();
}
}
function generate_mol(mol){
this.x = Math.random()*w;
this.y = Math.random()*h;
this.vx = Math.random()*-2;
this.vy = Math.random()*2;
this.vr = 0.1;
this.r = Math.random()*Math.PI;
this.draw = function(){
if(mol == "C6H6O"){
//Phenol
ctx.save();
ctx.translate(this.x+20,this.y+80);
ctx.rotate(this.r);
ctx.translate(-this.x+20,-this.y-80);
ctx.beginPath();
ctx.moveTo(this.x,this.y + 5);
ctx.lineTo(this.x,this.y + 30);
ctx.lineTo(this.x - 26,this.y + 45);
ctx.lineTo(this.x - 26,this.y + 75);
ctx.lineTo(this.x,this.y + 90);
ctx.lineTo(this.x + 26,this.y + 75);
ctx.lineTo(this.x + 26,this.y + 45);
ctx.lineTo(this.x,this.y + 30);
ctx.moveTo(this.x - 20,this.y + 47);
ctx.lineTo(this.x - 20,this.y + 73);
ctx.moveTo(this.x,this.y + 83);
ctx.lineTo(this.x + 22,this.y + 70);
ctx.moveTo(this.x,this.y + 36);
ctx.lineTo(this.x + 22,this.y + 49);
ctx.strokeStyle = "rgba(255,255,255,0.2)";
ctx.lineWidth = 3;
ctx.stroke();
ctx.fillStyle = "rgba(255,255,255,0.2)";
ctx.font = "15px Arial";
ctx.fillText("OH", this.x - 5, this.y);
ctx.closePath();
ctx.restore();
}
else if(mol == "C8H10N4O2"){
//Caffeine
ctx.save();
ctx.translate(this.x+20,this.y+80);
ctx.rotate(this.r);
ctx.translate(-this.x+20,-this.y-80);
ctx.beginPath();
ctx.moveTo(this.x,this.y + 5);
ctx.lineTo(this.x,this.y + 22);
ctx.moveTo(this.x-9,this.y + 35);
ctx.lineTo(this.x - 26,this.y + 45);
ctx.lineTo(this.x - 26,this.y + 75);
ctx.lineTo(this.x,this.y + 90);
ctx.lineTo(this.x + 18,this.y + 80);
ctx.moveTo(this.x + 26,this.y + 68);
ctx.lineTo(this.x + 26,this.y + 45);
ctx.lineTo(this.x + 9,this.y + 35);
ctx.moveTo(this.x - 20,this.y + 47);
ctx.lineTo(this.x - 20,this.y + 73);
ctx.moveTo(this.x + 23,this.y + 42);
ctx.lineTo(this.x + 36,this.y + 32);
ctx.moveTo(this.x + 26,this.y + 46);
ctx.lineTo(this.x + 39,this.y + 36);
ctx.moveTo(this.x + 34,this.y + 81);
ctx.lineTo(this.x + 48,this.y + 90);
ctx.moveTo(this.x - 2,this.y + 88);
ctx.lineTo(this.x - 2,this.y + 110);
ctx.moveTo(this.x + 3,this.y + 88);
ctx.lineTo(this.x + 3,this.y + 110);
ctx.moveTo(this.x - 26,this.y + 45);
ctx.lineTo(this.x - 46,this.y + 38);
ctx.moveTo(this.x - 60,this.y + 44);
ctx.lineTo(this.x - 74,this.y + 58);
ctx.lineTo(this.x - 61,this.y + 77);
ctx.moveTo(this.x - 58,this.y + 49);
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