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各种代码
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C20240265 LV 6 @ 2022-10-11 21:57:08
植物跟随鼠标生长动画
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>植物跟随鼠标生长动画</title>
<style>
body,
html {
position: absolute;
margin: 0;
padding: 0;
width: 100%;
height: 100%;
overflow: hidden;
background: #000;
user-select: none;
}
canvas {
position: absolute;
width: 100%;
height: 100%;
user-select: none;
touch-action: none;
content-zooming: none;
background: #000;
cursor: crosshair;
}
</style>
</head>
<body>
<canvas></canvas>
<script>
// LOVE MATRIX by nutsu, a study for drawing curl curve.
"use strict";
class Mat2 {
constructor() {
this.a = 1.0;
this.b = 0.0;
this.c = 0.0;
this.d = 1.0;
this.tx = 0.0;
this.ty = 0.0;
}
static create() {
return new Mat2();
}
multiply(b) {
const aa = this.a, ab = this.b, ac = this.c, ad = this.d;
this.a = aa * b.a + ac * b.b;
this.b = ab * b.a + ad * b.b;
this.c = aa * b.c + ac * b.d;
this.d = ab * b.c + ad * b.d;
this.tx += aa * b.tx + ac * b.ty;
this.ty += ab * b.tx + ad * b.ty;
return this;
}
rotate(rad) {
const aa = this.a, ab = this.b, ac = this.c, ad = this.d;
const s = Math.sin(rad);
const c = Math.cos(rad);
this.a = aa * c + ac * s;
this.b = ab * c + ad * s;
this.c = aa * -s + ac * c;
this.d = ab * -s + ad * c;
return this;
}
translate(x, y) {
this.tx += this.a * x + this.c * y;
this.ty += this.b * x + this.d * y;
return this;
}
scale(x, y) {
this.a *= x;
this.b *= x;
this.c *= y;
this.d *= y;
return this;
}
}
class WormObject {
constructor(x, y, vx, vy, len) {
this.vmt = Mat2.create().translate(x, y).rotate(Math.atan2(vy, vx));
const angle = (Math.random() * Math.PI / 2) - (Math.PI / 4);
this.tmt = Mat2.create().scale(0.92, 0.92).translate(len, 0).rotate(angle);
this.c1x = this.p1x = -0.5 * this.vmt.c + this.vmt.tx;
this.c1y = this.p1y = -0.5 * this.vmt.d + this.vmt.ty;
this.c2x = this.p2x = 0.5 * this.vmt.c + this.vmt.tx;
this.c2y = this.p2y = 0.5 * this.vmt.d + this.vmt.ty;
this.r = angle;
this.w = len * 0.4;
}
draw() {
if (Math.random() > 0.9) {
this.tmt.rotate(-this.r * 2);
this.r *= -1;
}
this.vmt.multiply(this.tmt);
const cc1x = -this.w * this.vmt.c + this.vmt.tx;
const cc1y = -this.w * this.vmt.d + this.vmt.ty;
const pp1x = (this.c1x + cc1x) / 2;
const pp1y = (this.c1y + cc1y) / 2;
const cc2x = this.w * this.vmt.c + this.vmt.tx;
const cc2y = this.w * this.vmt.d + this.vmt.ty;
const pp2x = (this.c2x + cc2x) / 2;
const pp2y = (this.c2y + cc2y) / 2;
ctx.beginPath();
ctx.shadowColor = "#000";
ctx.shadowBlur = this.w * 2;
ctx.shadowOffsetX = this.w * 0.5;
ctx.shadowOffsetY = this.w * 0.5;
ctx.strokeStyle = "#fff";
ctx.fillStyle = `hsl(${Math.round(this.w * 6 - (hue += 0.04))}, 80%, 60%)`;
ctx.moveTo(this.p1x, this.p1y);
ctx.quadraticCurveTo(this.c1x, this.c1y, pp1x, pp1y);
ctx.lineTo(pp2x, pp2y);
ctx.quadraticCurveTo(this.c2x, this.c2y, this.p2x, this.p2y);
ctx.closePath();
ctx.fill();
ctx.stroke();
this.c1x = cc1x;
this.c1y = cc1y;
this.p1x = pp1x;
this.p1y = pp1y;
this.c2x = cc2x;
this.c2y = cc2y;
this.p2x = pp2x;
this.p2y = pp2y;
}
}
const canvas = {
init() {
this.elem = document.querySelector("canvas");
this.resize();
window.addEventListener("resize", () => this.resize(), false);
return this.elem.getContext("2d");
},
resize() {
this.width = this.elem.width = this.elem.offsetWidth;
this.height = this.elem.height = this.elem.offsetHeight;
}
};
const pointer = {
frame: 0,
grow(x, y) {
const vx = x - this.px;
const vy = y - this.py;
const len = Math.min(Math.sqrt(vx * vx + vy * vy), 150);
if (len < 10) return;
vms.push(new WormObject(x, y, vx, vy, len));
this.px = x;
this.py = y;
},
move(e, touch) {
e.preventDefault();
const pointer = touch ? e.targetTouches[0] : e;
this.x = pointer.clientX;
this.y = pointer.clientY;
this.grow(this.x, this.y);
this.frame++;
if (!(this.frame % 2)) {
ctx.fillStyle = "rgba(0, 8, 16, 0.02)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
}
},
init(canvas) {
canvas.elem.addEventListener("mousemove", e => this.move(e, false), false);
canvas.elem.addEventListener("touchmove", e => this.move(e, true), false);
}
};
const ctx = canvas.init();
ctx.fillStyle = "#000";
ctx.fillRect(0, 0, canvas.width, canvas.height);
pointer.init(canvas);
const vms = [];
let hue = 180;
const run = () => {
requestAnimationFrame(run);
for (let i = 0; i < vms.length; i++) {
const o = vms[i];
const x = o.vmt.a * o.vmt.a + o.vmt.b * o.vmt.b;
if (x * o.w < 0.01) {
vms.splice(i, 1);
i--;
} else o.draw();
}
};
for (let a = 0; a < 2 * Math.PI; a += Math.random() > 0.9 ? 0.5 : 0.1) {
setTimeout(() => {
pointer.grow(
canvas.width * 0.5 + Math.cos(a) * canvas.width * 0.25,
canvas.height * 0.5 + Math.sin(a) * canvas.height * 0.25
);
}, a * 200);
}
run();
</script>
<div style="text-align:center;">
</div>
</body>
</html>
罗盘时钟
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>罗盘时钟</title>
<style>
*{
margin:0;
padding:0
}
html,body{
width:100%;
height:100%;
background-color:#000;
overflow:hidden
}
#clock{
position:relative;
width:100%;
height:100%;
background:#000
}
.label{
display:inline-block;
color:#4d4d4d;
text-align:center;
padding:0 5px;
font-size:19px;
transition:left 1s,top 1s;
transform-origin:0% 0%
}
</style>
</head>
<body>
<div id="clock"></div>
<script>
var monthText=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"];
var dayText=["零一号","零二号","零三号","零四号","零五号","零六号","零七号","零八号","零九号","十号","十一号","十二号","十三号","十四号","十五号","十六号","十七号","十八号","十九号","二十号","二十一号","二十二号","二十三号","二十四号","二十五号","二十六号","二十七号","二十八号","二十九号","三十号","三十一号"];
var weekText=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var hourText=["零点","零一点","零两点","零三点","零四点","零五点","零六点","零七点","零八点","零九点","零十点","十一点","十二点","十三点","十四点","十五点","十六点","十七点","十八点","十九点","二十点","二十一点","二十二点","二十三点"];
var minuteText=["零一分","零二分","零三分","零四分","零五分","零六分","零七分","零八分","零九分","零十分","十一分","十二分","十三分","十四分","十五分","十六分","十七分","十八分","十九分","二十分","二十一分","二十二分","二十三分","二十四分","二十五分","二十六分","二十七分","二十八分","二十九分","三十分","三十一分","三十二分","三十三分","三十四分","三十五分","三十六分","三十七分","三十八分","三十九分","四十分","四十一分","四十二分","四十三分","四十四分","四十五分","四十六分","四十七分","四十八分","四十九分","五十分","五十一分","五十二分","五十三分","五十四分","五十五分","五十六分","五十七分","五十八分","五十九分","六十分"];
var secondsText=["零一秒","零二秒","零三秒","零四秒","零五秒","零六秒","零七秒","零八秒","零九秒","零十秒","十一秒","十二秒","十三秒","十四秒","十五秒","十六秒","十七秒","十八秒","十九秒","二十秒","二十一秒","二十二秒","二十三秒","二十四秒","二十五秒","二十六秒","二十七秒","二十八秒","二十九秒","三十秒","三十一秒","三十二秒","三十三秒","三十四秒","三十五秒","三十六秒","三十七秒","三十八秒","三十九秒","四十秒","四十一秒","四十二秒","四十三秒","四十四秒","四十五秒","四十六秒","四十七秒","四十八秒","四十九秒","五十秒","五十一秒","五十二秒","五十三秒","五十四秒","五十五秒","五十六秒","五十七秒","五十八秒","五十九秒","六十秒"];
var clock;var monthList=[];
var dayList=[];
var weekList=[];
var hourList=[];
var minuteList=[];
var secondsList=[];
var isCircle=false;
var textSet=[[monthText,monthList],
[dayText,dayList],
[weekText,weekList],
[hourText,hourList],
[minuteText,minuteList],
[secondsText,secondsList]];
window.onload=function()
{
init();
setInterval(function()
{runTime();
},100);
changePosition();
setTimeout(function()
{changeCircle();
},2000);
}
function init()
{clock=document.getElementById('clock');
for(var i=0;
i<textSet.length;i++)
{for(var j=0;j<textSet[i][0].length;j++)
{var temp=createLabel(textSet[i][0][j]);
clock.appendChild(temp);textSet[i][1].push(temp);
}
}
}
function createLabel(text)
{
var div=document.createElement('div');
div.classList.add('label');
div.innerText=text;return div;
}
function runTime()
{
var now=new Date();
var month=now.getMonth();
var day=now.getDate();
var week=now.getDay();
var hour=now.getHours();
var minute=now.getMinutes()-1;
var seconds=now.getSeconds()-1;
initStyle();
var nowValue=[month,day-1,week,hour,minute,seconds];
for(var i=0;
i<nowValue.length;
i++)
{var num=nowValue[i];
textSet[i][1][num].style.color='#fff';
}
if(isCircle)
{var widthMid=document.body.clientWidth/2;
var heightMid=document.body.clientHeight/2;
for(var i=0;
i<textSet.length;
i++){for(var j=0;
j<textSet[i][0].length;
j++){var r=(i+1)*35+50*i;
var deg=360/textSet[i][1].length*(j-nowValue[i]);
var x=r*Math.sin(deg*Math.PI/180)+widthMid;
var y=heightMid-r*Math.cos(deg*Math.PI/180);
var temp=textSet[i][1][j];
temp.style.transform='rotate('+(-90+deg)+'deg)';
temp.style.left=x+'px';
temp.style.top=y+'px';
}
}
}
}
function initStyle()
{var label=document.getElementsByClassName('label');
for(var i=0;
i<label.length;i++)
{label[i].style.color='#4d4d4d';
}
}
function changePosition()
{
for(let i=0;i<textSet.length;
i++)
{
for(let j=0;
j<textSet[i][1].length;
j++){
let tempX=textSet[i][1][j].offsetLeft+"px";
let tempY=textSet[i][1][j].offsetTop+"px";
setTimeout(function(){
textSet[i][1][j].style.position="absolute";
textSet[i][1][j].style.left=tempX;textSet[i][1][j].style.top=tempY;
},50);
}
}
}
function changeCircle()
{
isCircle=true;
clock.style.transform="rotate(90deg)";
}
</script>
</body>
</html>