3D动态烟花--HTML

写代码无聊了，要为自己找一些有意思的事情去做嘛，顺便也可以在小白面前装一下下。这是一个3D烟花动态图，用H5写的。

使用方法：

在电脑上创建一个文本文档，将下面的代码复制上去，然后将文本扩展名改为html（例如：3D烟花.html) ，然后该文件就会变成网页的图标。点击运行就行了，IE浏览器可能无法运行，可能只会出来黑屏，不过我使用的win10系统的Microsoft Edge可以出来。如果不行，请使用火狐浏览器。

效果图如下：（此图片是静态的，程序运行出来是动态的)

代码如下：

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>烟花动画特效</title><style>
html,body{margin:0px;width:100%;height:100%;overflow:hidden;background:#000;
}#canvas{width:100%;height:100%;
}
</style></head>
<body><canvas id="canvas"></canvas><script>
function initVars(){pi=Math.PI;ctx=canvas.getContext("2d");canvas.width=canvas.clientWidth;canvas.height=canvas.clientHeight;cx=canvas.width/2;cy=canvas.height/2;playerZ=-25;playerX=playerY=playerVX=playerVY=playerVZ=pitch=yaw=pitchV=yawV=0;scale=600;seedTimer=0;seedInterval=5,seedLife=100;gravity=.02;seeds=new Array();sparkPics=new Array();s="https://cantelope.org/NYE/";for(i=1;i<=10;++i){sparkPic=new Image();sparkPic.src=s+"spark"+i+".png";sparkPics.push(sparkPic);}sparks=new Array();pow1=new Audio(s+"pow1.ogg");pow2=new Audio(s+"pow2.ogg");pow3=new Audio(s+"pow3.ogg");pow4=new Audio(s+"pow4.ogg");frames = 0;
}function rasterizePoint(x,y,z){var p,d;x-=playerX;y-=playerY;z-=playerZ;p=Math.atan2(x,z);d=Math.sqrt(x*x+z*z);x=Math.sin(p-yaw)*d;z=Math.cos(p-yaw)*d;p=Math.atan2(y,z);d=Math.sqrt(y*y+z*z);y=Math.sin(p-pitch)*d;z=Math.cos(p-pitch)*d;var rx1=-1000,ry1=1,rx2=1000,ry2=1,rx3=0,ry3=0,rx4=x,ry4=z,uc=(ry4-ry3)*(rx2-rx1)-(rx4-rx3)*(ry2-ry1);if(!uc) return {x:0,y:0,d:-1};var ua=((rx4-rx3)*(ry1-ry3)-(ry4-ry3)*(rx1-rx3))/uc;var ub=((rx2-rx1)*(ry1-ry3)-(ry2-ry1)*(rx1-rx3))/uc;if(!z)z=.000000001;if(ua>0&&ua<1&&ub>0&&ub<1){return {x:cx+(rx1+ua*(rx2-rx1))*scale,y:cy+y/z*scale,d:Math.sqrt(x*x+y*y+z*z)};}else{return {x:cx+(rx1+ua*(rx2-rx1))*scale,y:cy+y/z*scale,d:-1};}
}function spawnSeed(){seed=new Object();seed.x=-50+Math.random()*100;seed.y=25;seed.z=-50+Math.random()*100;seed.vx=.1-Math.random()*.2;seed.vy=-1.5;//*(1+Math.random()/2);seed.vz=.1-Math.random()*.2;seed.born=frames;seeds.push(seed);
}function splode(x,y,z){t=5+parseInt(Math.random()*150);sparkV=1+Math.random()*2.5;type=parseInt(Math.random()*3);switch(type){case 0:pic1=parseInt(Math.random()*10);break;case 1:pic1=parseInt(Math.random()*10);do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);break;case 2:pic1=parseInt(Math.random()*10);do{ pic2=parseInt(Math.random()*10); }while(pic2==pic1);do{ pic3=parseInt(Math.random()*10); }while(pic3==pic1 || pic3==pic2);break;}for(m=1;m<t;++m){spark=new Object();spark.x=x; spark.y=y; spark.z=z;p1=pi*2*Math.random();p2=pi*Math.random();v=sparkV*(1+Math.random()/6)spark.vx=Math.sin(p1)*Math.sin(p2)*v;spark.vz=Math.cos(p1)*Math.sin(p2)*v;spark.vy=Math.cos(p2)*v;switch(type){case 0: spark.img=sparkPics[pic1]; break;case 1:spark.img=sparkPics[parseInt(Math.random()*2)?pic1:pic2];break;case 2:switch(parseInt(Math.random()*3)){case 0: spark.img=sparkPics[pic1]; break;case 1: spark.img=sparkPics[pic2]; break;case 2: spark.img=sparkPics[pic3]; break;}break;}spark.radius=25+Math.random()*50;spark.alpha=1;spark.trail=new Array();sparks.push(spark);}switch(parseInt(Math.random()*4)){case 0:  pow=new Audio(s+"pow1.ogg"); break;case 1:  pow=new Audio(s+"pow2.ogg"); break;case 2:  pow=new Audio(s+"pow3.ogg"); break;case 3:  pow=new Audio(s+"pow4.ogg"); break;}d=Math.sqrt((x-playerX)*(x-playerX)+(y-playerY)*(y-playerY)+(z-playerZ)*(z-playerZ));pow.volume=1.5/(1+d/10);pow.play();
}function doLogic(){if(seedTimer<frames){seedTimer=frames+seedInterval*Math.random()*10;spawnSeed();}for(i=0;i<seeds.length;++i){seeds[i].vy+=gravity;seeds[i].x+=seeds[i].vx;seeds[i].y+=seeds[i].vy;seeds[i].z+=seeds[i].vz;if(frames-seeds[i].born>seedLife){splode(seeds[i].x,seeds[i].y,seeds[i].z);seeds.splice(i,1);}}for(i=0;i<sparks.length;++i){if(sparks[i].alpha>0 && sparks[i].radius>5){sparks[i].alpha-=.01;sparks[i].radius/=1.02;sparks[i].vy+=gravity;point=new Object();point.x=sparks[i].x;point.y=sparks[i].y;point.z=sparks[i].z;if(sparks[i].trail.length){x=sparks[i].trail[sparks[i].trail.length-1].x;y=sparks[i].trail[sparks[i].trail.length-1].y;z=sparks[i].trail[sparks[i].trail.length-1].z;d=((point.x-x)*(point.x-x)+(point.y-y)*(point.y-y)+(point.z-z)*(point.z-z));if(d>9){sparks[i].trail.push(point);}}else{sparks[i].trail.push(point);}if(sparks[i].trail.length>5)sparks[i].trail.splice(0,1);              sparks[i].x+=sparks[i].vx;sparks[i].y+=sparks[i].vy;sparks[i].z+=sparks[i].vz;sparks[i].vx/=1.075;sparks[i].vy/=1.075;sparks[i].vz/=1.075;}else{sparks.splice(i,1);}}p=Math.atan2(playerX,playerZ);d=Math.sqrt(playerX*playerX+playerZ*playerZ);d+=Math.sin(frames/80)/1.25;t=Math.sin(frames/200)/40;playerX=Math.sin(p+t)*d;playerZ=Math.cos(p+t)*d;yaw=pi+p+t;
}function rgb(col){var r = parseInt((.5+Math.sin(col)*.5)*16);var g = parseInt((.5+Math.cos(col)*.5)*16);var b = parseInt((.5-Math.sin(col)*.5)*16);return "#"+r.toString(16)+g.toString(16)+b.toString(16);
}function draw(){ctx.clearRect(0,0,cx*2,cy*2);ctx.fillStyle="#ff8";for(i=-100;i<100;i+=3){for(j=-100;j<100;j+=4){x=i;z=j;y=25;point=rasterizePoint(x,y,z);if(point.d!=-1){size=250/(1+point.d);d = Math.sqrt(x * x + z * z);a = 0.75 - Math.pow(d / 100, 6) * 0.75;if(a>0){ctx.globalAlpha = a;ctx.fillRect(point.x-size/2,point.y-size/2,size,size);              }}}}ctx.globalAlpha=1;for(i=0;i<seeds.length;++i){point=rasterizePoint(seeds[i].x,seeds[i].y,seeds[i].z);if(point.d!=-1){size=200/(1+point.d);ctx.fillRect(point.x-size/2,point.y-size/2,size,size);}}point1=new Object();for(i=0;i<sparks.length;++i){point=rasterizePoint(sparks[i].x,sparks[i].y,sparks[i].z);if(point.d!=-1){size=sparks[i].radius*200/(1+point.d);if(sparks[i].alpha<0)sparks[i].alpha=0;if(sparks[i].trail.length){point1.x=point.x;point1.y=point.y;switch(sparks[i].img){case sparkPics[0]:ctx.strokeStyle="#f84";break;case sparkPics[1]:ctx.strokeStyle="#84f";break;case sparkPics[2]:ctx.strokeStyle="#8ff";break;case sparkPics[3]:ctx.strokeStyle="#fff";break;case sparkPics[4]:ctx.strokeStyle="#4f8";break;case sparkPics[5]:ctx.strokeStyle="#f44";break;case sparkPics[6]:ctx.strokeStyle="#f84";break;case sparkPics[7]:ctx.strokeStyle="#84f";break;case sparkPics[8]:ctx.strokeStyle="#fff";break;case sparkPics[9]:ctx.strokeStyle="#44f";break;}for(j=sparks[i].trail.length-1;j>=0;--j){point2=rasterizePoint(sparks[i].trail[j].x,sparks[i].trail[j].y,sparks[i].trail[j].z);if(point2.d!=-1){ctx.globalAlpha=j/sparks[i].trail.length*sparks[i].alpha/2;ctx.beginPath();ctx.moveTo(point1.x,point1.y);ctx.lineWidth=1+sparks[i].radius*10/(sparks[i].trail.length-j)/(1+point2.d);ctx.lineTo(point2.x,point2.y);ctx.stroke();point1.x=point2.x;point1.y=point2.y;}}}ctx.globalAlpha=sparks[i].alpha;ctx.drawImage(sparks[i].img,point.x-size/2,point.y-size/2,size,size);}}
}function frame(){if(frames>100000){seedTimer=0;frames=0;}frames++;draw();doLogic();requestAnimationFrame(frame);
}window.addEventListener("resize",()=>{canvas.width=canvas.clientWidth;canvas.height=canvas.clientHeight;cx=canvas.width/2;cy=canvas.height/2;
});initVars();
frame();
</script></body>
</html>

3D动态烟花--HTML相关推荐

动态爱心和3D旋转烟花代码
动态爱心 (可直接复制到txt记事本中,保存后把文件后缀.txt改为.html点击即可通过浏览器打开) <!doctype html> <html> <head> ...
跨年烟花（用HTML制作动态烟花）
跨年烟花(用HTML制作动态烟花) 先看效果图 html代码 <!doctype html> <html> <head> <meta charset=&quo ...
首发：徐亦达团队新论文推荐(ECCV2020)：端到端多人多视角3d动态匹配网络
徐亦达团队在ECCV2020上发表了一篇机器学习论文 End-to-end Dynamic Matching Network for Multi-view Multi-person 3d Pose E ...
炫酷插件_PS如何做炫酷动图？推荐5款黑科技PS插件（3D动态|分散粒子｜烟雾特效..）帮你轻松实现...
动态的图片越来越受到人们的欢迎,但普通小白上手却不太简单,今天给大家分享几款黑科技PS插件,神秘浓雾气特效GIF动作插件,分散粒子插件动作,图片变故障特效psd图层样式,图片变3D动态--tikuwa ...
CSS 3D动态立体图形
CSS 3D动态立方体 1. HTML <body><div class="box"><div class="test"> ...
520表白html实现3D动态相册，换成女朋友照片
介绍: 还有几天就是5月20号了赶紧做好给你女朋友给你喜欢的人表白3D动态相册,换成女朋友照片,顺畅丝滑,单身狗的吃狗粮吧,哈哈哈哈前端小伙伴也可以学习学习地址: http://zijiepan2 ...
最新520表白HTML源码+实现3D动态相册
正文: 最新520表白HTML源码+实现3D动态相册,还有几天就是5月20号了,赶紧做好给你女朋友,又或者用来给你喜欢的人表白啥的. 源码属于3D动态相册,是动态的哈,但是由于文章不能上传GIF图片, ...
用R语言，制作动态烟花
用R语言,制作动态烟花
c语言动态烟花小程序代码,如何用c语言编写动态烟花
用c语言编写动态烟花的方法:首先绘制菜单界面显示文字:然后设置烟花有上升阶段和爆炸阶段,定义烟花和烟花弹结构体:最后初始化数据,加载资源贴图,随机发射数目随机. 用c语言编写动态烟花的方法: 效果展示 ...

3D动态烟花--HTML

3D动态烟花--HTML相关推荐

最新文章

热门文章