2022跨年烟花——封宿后的去旧年
Posted 秋名山码民
tags:
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前言
首先，祝福各位彦祖们，2022快乐，如果没有对象，今年必定脱单！在封宿之余，我做了个跨年烟花来给自己过个年，和彦祖们分享一下，大家先来看一下效果图。
代码
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
<style>
body
margin: 0;
padding: 0;
overflow: hidden;
.city
width: 100%;
position: fixed;
bottom: 0px;
z-index: 100;
.city img
width: 100%;
</style>
<title>放烟花</title>
</head>
<body onselectstart="return false">
<canvas id='cas' style="background-color:rgba(0,5,24,1)">浏览器不支持canvas</canvas>
<div class="city"><img src="city.png" alt="" /></div>
<img src="moon.png" alt="" id="moon" style="visibility: hidden;" />
<div style="display:none">
<div class="shape">跨年快乐</div>
<div class="shape">我与旧事归于尽</div>
<div class="shape">我与旧事归于尽</div>
<div class="shape">来年依旧林花开</div>
<div class="shape"></div>来年依旧林花开</div>
</div>
<script>
var canvas = document.getElementById("cas");
var ocas = document.createElement("canvas");
var octx = ocas.getContext("2d");
var ctx = canvas.getContext("2d");
ocas.width = canvas.width = window.innerWidth;
ocas.height = canvas.height = window.innerHeight;
var bigbooms = [];
window.onload = function()
initAnimate()
function initAnimate()
drawBg();
lastTime = new Date();
animate();
var lastTime;
function animate()
ctx.save();
ctx.fillStyle = "rgba(0,5,24,0.1)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
ctx.restore();
var newTime = new Date();
if (newTime - lastTime > 500 + (window.innerHeight - 767) / 2)
var random = Math.random() * 100 > 2 ? true : false;
var x = getRandom(canvas.width / 5, canvas.width * 4 / 5);
var y = getRandom(50, 200);
if (random)
var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF",
x: x,
y: y
);
bigbooms.push(bigboom)
else
var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF",
x: canvas.width / 2,
y: 200
, document.querySelectorAll(".shape")[parseInt(getRandom(0, document.querySelectorAll(".shape").length))]);
bigbooms.push(bigboom)
lastTime = newTime;
console.log(bigbooms)
stars.foreach(function()
this.paint();
)
drawMoon();
bigbooms.foreach(function(index)
var that = this;
if (!this.dead)
this._move();
this._drawLight();
else
this.booms.foreach(function(index)
if (!this.dead)
this.moveTo(index);
else if (index === that.booms.length - 1)
bigbooms[bigbooms.indexOf(that)] = null;
)
);
raf(animate);
function drawMoon()
var moon = document.getElementById("moon");
var centerX = canvas.width - 200,
centerY = 100,
width = 80;
if (moon.complete)
ctx.drawImage(moon, centerX, centerY, width, width)
else
moon.onload = function()
ctx.drawImage(moon, centerX, centerY, width, width)
var index = 0;
for (var i = 0; i < 10; i++)
ctx.save();
ctx.beginPath();
ctx.arc(centerX + width / 2, centerY + width / 2, width / 2 + index, 0, 2 * Math.PI);
ctx.fillStyle = "rgba(240,219,120,0.005)";
index += 2;
ctx.fill();
ctx.restore();
Array.prototype.foreach = function(callback)
for (var i = 0; i < this.length; i++)
if (this[i] !== null) callback.apply(this[i], [i])
var raf = window.requestAnimationFrame || window.webkitRequestAnimationFrame || window.mozRequestAnimationFrame || window.oRequestAnimationFrame || window.msRequestAnimationFrame || function(callback)
window.setTimeout(callback, 1000 / 60);
;
canvas.onclick = function()
var x = event.clientX;
var y = event.clientY;
var bigboom = new Boom(getRandom(canvas.width / 3, canvas.width * 2 / 3), 2, "#FFF",
x: x,
y: y
);
bigbooms.push(bigboom)
// canvas.addEventLisener("touchstart" , function(event)
// var touch = event.targetTouches[0];
// var x = event.pageX;
// var y = event.pageY;
// var bigboom = new Boom(getRandom(canvas.width/3,canvas.width*2/3) ,2,"#FFF" , x:x , y:y);
// bigbooms.push(bigboom)
// )
var Boom = function(x, r, c, boomArea, shape)
this.booms = [];
this.x = x;
this.y = (canvas.height + r);
this.r = r;
this.c = c;
this.shape = shape || false;
this.boomArea = boomArea;
this.theta = 0;
this.dead = false;
this.ba = parseInt(getRandom(80, 200));
Boom.prototype =
_paint: function()
ctx.save();
ctx.beginPath();
ctx.arc(this.x, this.y, this.r, 0, 2 * Math.PI);
ctx.fillStyle = this.c;
ctx.fill();
ctx.restore();
,
_move: function()
var dx = this.boomArea.x - this.x,
dy = this.boomArea.y - this.y;
this.x = this.x + dx * 0.01;
this.y = this.y + dy * 0.01;
if (Math.abs(dx) <= this.ba && Math.abs(dy) <= this.ba)
if (this.shape)
this._shapBoom();
else this._boom();
this.dead = true;
else
this._paint();
,
_drawLight: function()
ctx.save();
ctx.fillStyle = "rgba(255,228,150,0.3)";
ctx.beginPath();
ctx.arc(this.x, this.y, this.r + 3 * Math.random() + 1, 0, 2 * Math.PI);
ctx.fill();
ctx.restore();
,
_boom: function()
var fragNum = getRandom(30, 200);
var style = getRandom(0, 10) >= 5 ? 1 : 2;
var color;
if (style === 1)
color =
a: parseInt(getRandom(128, 255)),
b: parseInt(getRandom(128, 255)),
c: parseInt(getRandom(128, 255))
var fanwei = parseInt(getRandom(300, 400));
for (var i = 0; i < fragNum; i++)
if (style === 2)
color =
a: parseInt(getRandom(128, 255)),
b: parseInt(getRandom(128, 255)),
c: parseInt(getRandom(128, 255))
var a = getRandom(-Math.PI, Math.PI);
var x = getRandom(0, fanwei) * Math.cos(a) + this.x;
var y = getRandom(0, fanwei) * Math.sin(a) + this.y;
var radius = getRandom(0, 2)
var frag = new Frag(this.x, this.y, radius, color, x, y);
this.booms.push(frag);
,
_shapBoom: function()
var that = this;
putValue(ocas, octx, this.shape, 5, function(dots)
var dx = canvas.width / 2 - that.x;
var dy = canvas.height / 2 - that.y;
for (var i = 0; i < dots.length; i++)
color =
a: dots[i].a,
b: dots[i].b,
c: dots[i].c
var x = dots[i].x;
var y = dots[i].y;
var radius = 1;
var frag = new Frag(that.x, that.y, radius, color, x - dx, y - dy);
that.booms.push(frag);
)
function putValue(canvas, context, ele, dr, callback)
context.clearRect2022跨年烟花代码|用Python送你一场跨年烟花秀