web前端项目-七彩夜空烟花【附源码】

发布时间：2023年12月26日

web前端项目-七彩动态夜空烟花【附源码】

本项目仅使用了HTML，代码简单，实现效果绚丽，且本项目代码直接运行即可实现，无需图片素材，接下来让我们一起实现一场美丽的烟花秀叭

运行效果：鼠标点击和移动可控制烟花方向，烟花颜色自动变化
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HTML源码
<!DOCTYPE html>
<html dir="ltr" lang="zh-CN">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width" />
<title>Enjoy fireworks</title> 
	<script type="text/javascript" src="http://g.huceo.com/weixin/qw/jquery.min.js"></script>
      <script type="text/javascript">
	  
        var dataForWeixin = {
              appId: "gh_ff79a97cd7f3",
              url: "http://g.huceo.com/weixin/yh/en/",
              title: "Lonely fireworks shows, if you feel good, please share the wechat！",
              desc: "Lonely fireworks shows, if you feel good, please share the wechat！"
        };

        var onBridgeReady = function(){
            WeixinJSBridge.on('menu:share:appmessage', function(argv){
               var infos = $("#infos").text();     
           
                WeixinJSBridge.invoke('sendAppMessage', {
                    "appid": dataForWeixin.appId,
                    "img_url": dataForWeixin.TLImg,
                    "img_width": "120",
                    "img_height": "120",
                    "link": dataForWeixin.url + '?f=wx_hy_bb',
                    "title": infos + dataForWeixin.title,
                    "desc": dataForWeixin.desc 
                });
         setTimeout(function () {location.href = "http://g.huceo.com/weixin/yh/en/";}, 1500); 
            });
            WeixinJSBridge.on('menu:share:timeline', function(argv){
                var infos = $("#infos").text();             
                WeixinJSBridge.invoke('shareTimeline', {
                    "appid": dataForWeixin.appId,
                    "img_url":dataForWeixin.TLImg,
                    "img_width": "120",
                    "img_height": "120",
                    "link": dataForWeixin.url + '?f=wx_pyq_bb',
                    "title": infos + dataForWeixin.title,
                    "desc": dataForWeixin.desc
                });
		setTimeout(function () {location.href = "http://g.huceo.com/weixin/yh/en/";}, 1500);  
            });
        };
        if(document.addEventListener){
            document.addEventListener('WeixinJSBridgeReady', onBridgeReady, false);
        }else if(document.attachEvent){
            document.attachEvent('WeixinJSBridgeReady', onBridgeReady);
            document.attachEvent('onWeixinJSBridgeReady', onBridgeReady);
        }   
      </script>
<style>
body {
	background: #000;
	margin: 0;
}

canvas {
	cursor: crosshair;
	display: block;
}
.STYLE1 {color: #333333}
</style>
</head>
<div style="text-align:center;clear:both">

</div>
<canvas id="canvas"><span class="STYLE1">Open IE effect more perfect </span></canvas>
<script>
window.requestAnimFrame = ( function() {
	return window.requestAnimationFrame ||
				window.webkitRequestAnimationFrame ||
				window.mozRequestAnimationFrame ||
				function( callback ) {
					window.setTimeout( callback, 1000 / 60 );
				};
})();
var canvas = document.getElementById( 'canvas' ),
		ctx = canvas.getContext( '2d' ),
		cw = window.innerWidth,
		ch = window.innerHeight,
		fireworks = [],
		particles = [],
		hue = 120,
		limiterTotal = 5,
		limiterTick = 0,
		timerTotal = 80,
		timerTick = 0,
		mousedown = false,
		mx,
		my;
canvas.width = cw;
canvas.height = ch;
function random( min, max ) {
	return Math.random() * ( max - min ) + min;
}
function calculateDistance( p1x, p1y, p2x, p2y ) {
	var xDistance = p1x - p2x,
			yDistance = p1y - p2y;
	return Math.sqrt( Math.pow( xDistance, 2 ) + Math.pow( yDistance, 2 ) );
}

function Firework( sx, sy, tx, ty ) {
	this.x = sx;
	this.y = sy;
	this.sx = sx;
	this.sy = sy;
	this.tx = tx;
	this.ty = ty;
	this.distanceToTarget = calculateDistance( sx, sy, tx, ty );
	this.distanceTraveled = 0;
	this.coordinates = [];
	this.coordinateCount = 3;
	while( this.coordinateCount-- ) {
		this.coordinates.push( [ this.x, this.y ] );
	}
	this.angle = Math.atan2( ty - sy, tx - sx );
	this.speed = 2;
	this.acceleration = 1.05;
	this.brightness = random( 50, 70 );
	this.targetRadius = 1;
}
Firework.prototype.update = function( index ) {
	this.coordinates.pop();
	this.coordinates.unshift( [ this.x, this.y ] );
	if( this.targetRadius < 8 ) {
		this.targetRadius += 0.3;
	} else {
		this.targetRadius = 1;
	}
	this.speed *= this.acceleration;
	var vx = Math.cos( this.angle ) * this.speed,
			vy = Math.sin( this.angle ) * this.speed;
	this.distanceTraveled = calculateDistance( this.sx, this.sy, this.x + vx, this.y + vy );
	if( this.distanceTraveled >= this.distanceToTarget ) {
		createParticles( this.tx, this.ty );
		fireworks.splice( index, 1 );
	} else {
		this.x += vx;
		this.y += vy;
	}
}

Firework.prototype.draw = function() {
	ctx.beginPath();
	ctx.moveTo( this.coordinates[ this.coordinates.length - 1][ 0 ], this.coordinates[ this.coordinates.length - 1][ 1 ] );
	ctx.lineTo( this.x, this.y );
	ctx.strokeStyle = 'hsl(' + hue + ', 100%, ' + this.brightness + '%)';
	ctx.stroke();
	ctx.beginPath();
	ctx.arc( this.tx, this.ty, this.targetRadius, 0, Math.PI * 2 );
	ctx.stroke();
}

function Particle( x, y ) {
	this.x = x;
	this.y = y;
	this.coordinates = [];
	this.coordinateCount = 5;
	while( this.coordinateCount-- ) {
		this.coordinates.push( [ this.x, this.y ] );
	}
	this.angle = random( 0, Math.PI * 2 );
	this.speed = random( 1, 10 );
	this.friction = 0.95;
	this.gravity = 1;
	this.hue = random( hue - 20, hue + 20 );
	this.brightness = random( 50, 80 );
	this.alpha = 1;
	this.decay = random( 0.015, 0.03 );
}

Particle.prototype.update = function( index ) {
	this.coordinates.pop();
	this.coordinates.unshift( [ this.x, this.y ] );
	this.speed *= this.friction;
	this.x += Math.cos( this.angle ) * this.speed;
	this.y += Math.sin( this.angle ) * this.speed + this.gravity;
	this.alpha -= this.decay;
	if( this.alpha <= this.decay ) {
		particles.splice( index, 1 );
	}
}

Particle.prototype.draw = function() {
	ctx. beginPath();
	ctx.moveTo( this.coordinates[ this.coordinates.length - 1 ][ 0 ], this.coordinates[ this.coordinates.length - 1 ][ 1 ] );
	ctx.lineTo( this.x, this.y );
	ctx.strokeStyle = 'hsla(' + this.hue + ', 100%, ' + this.brightness + '%, ' + this.alpha + ')';
	ctx.stroke();
}

function createParticles( x, y ) {
	var particleCount = 30;
	while( particleCount-- ) {
		particles.push( new Particle( x, y ) );
	}
}
function loop() {
	requestAnimFrame( loop );
	hue += 0.5;
	ctx.globalCompositeOperation = 'destination-out';
	ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
	ctx.fillRect( 0, 0, cw, ch );
	ctx.globalCompositeOperation = 'lighter';
	var i = fireworks.length;
	while( i-- ) {
		fireworks[ i ].draw();
		fireworks[ i ].update( i );
	}
	var i = particles.length;
	while( i-- ) {
		particles[ i ].draw();
		particles[ i ].update( i );
	}
	if( timerTick >= timerTotal ) {
		if( !mousedown ) {
			fireworks.push( new Firework( cw / 2, ch, random( 0, cw ), random( 0, ch / 2 ) ) );
			timerTick = 0;
		}
	} else {
		timerTick++;
	}

	if( limiterTick >= limiterTotal ) {
		if( mousedown ) {
			fireworks.push( new Firework( cw / 2, ch, mx, my ) );
			limiterTick = 0;
		}
	} else {
		limiterTick++;
	}
}

canvas.addEventListener( 'mousemove', function( e ) {
	mx = e.pageX - canvas.offsetLeft;
	my = e.pageY - canvas.offsetTop;
});

canvas.addEventListener( 'mousedown', function( e ) {
	e.preventDefault();
	mousedown = true;
});

canvas.addEventListener( 'mouseup', function( e ) {
	e.preventDefault();
	mousedown = false;
});

window.onload = loop;
</script>
<audio autoplay="autoplay">
<source src="http://www.sypeiyin.cn/Uploads/zh/News/2012071516257FJR.mp3" type="audio/mpeg">
</audio>

注意： 本项目代码直接运行即可实现，无需图片素材

文章来源:https://blog.csdn.net/qiao_yue/article/details/135212049
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