软件系统开发定制Html炫酷代码例程

目录

1、代码雨

<!doctype html><html>	<head>		<meta charset="utf-8" />		<title>流星雨</title>		<meta name="keywords" content="关键词，关键字">		<meta name="description" content="描述信息">		<style>			body {				margin: 0;				overflow: hidden;			}		</style>	</head> 	<body> 		<!--			<canvas>画布 画板 软件系统开发定制画画的本子		-->		<canvas width=400 height=400 style="background:#000000;" id="canvas"></canvas> 		<!--			javascript			画笔		--> 		<script>								//获取画板			//doccument 当前文档			//getElement 软件系统开发定制获取一个标签			//ById 通过Id名称的方式			//var 声明一片空间			//var canvas 声明一片空间的名字叫做canvas			var canvas = document.getElementById("canvas");			//获取画板权限 上下文			var ctx = canvas.getContext("2d");			//让画板的大小等于屏幕的大小			/*				思路：					1.获取屏幕对象					2.获取屏幕的尺寸					3.屏幕的尺寸赋值给画板			*/			//获取屏幕对象			var s = window.screen;			//获取屏幕的宽度和高度			var w = s.width;			var h = s.height;			//设置画板的大小			canvas.width = w;			canvas.height = h; 			//设置文字大小 			var fontSize = 14;			//计算一行有多少个文字 取整数 向下取整			var clos = Math.floor(w/fontSize);			//思考每一个字的坐标			//创建数组把clos 个 0 （y坐标存储起来）			var drops = [];			var str = "qwertyuiopasdfghjklzxcvbnm";			//往数组里面添加 clos 个 0			for(var i = 0;i<clos;i++) {				drops.push(0);			} 			//绘制文字			function drawString() {				//给矩形设置填充色				ctx.fillStyle="rgba(0,0,0,0.05)"				//绘制一个矩形				ctx.fillRect(0,0,w,h); 				//添加文字样式				ctx.font = "600 "+fontSize+"px 微软雅黑";				//设置文字颜色				ctx.fillStyle = "#00ff00"; 				for(var i = 0;i<clos;i++) {					//x坐标					var x = i*fontSize;					//y坐标					var y = drops[i]*fontSize;					//设置绘制文字					ctx.fillText(str[Math.floor(Math.random()*str.length)],x,y);					if(y>h&&Math.random()>0.99){						drops[i] = 0;					}					drops[i]++;				}								}			//定义一个定时器，每隔30毫秒执行一次			setInterval(drawString,30);		</script>	</body></html>
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2、3D烟花

<!doctype html><html lang="en"> <head>  <meta charset="UTF-8">  <meta name="Generator" content="EditPlus®">  <meta name="Author" content="">  <meta name="Keywords" content="">  <meta name="Description" content="">  <title>Document</title>  <style>html,body{  margin:0px;  width:100%;  height:100%;  overflow:hidden;  background:#000;}#canvas{  width:100%;  height:100%;}  </style>  </head><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);  }  pow = new Audio(`${s}pow${~~(Math.random()*4)}.ogg`);   // 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>
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3、炫彩光圈

<!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" lang="en"><head><title>star</title><script type="text/javascript">window.onload = function () {C = Math.cos; // cache Math objectsS = Math.sin;U = 0;w = window;j = document;d = j.getElementById("c");c = d.getContext("2d");W = d.width = w.innerWidth;H = d.height = w.innerHeight;c.fillRect(0, 0, W, H); // resize <canvas> and draw black rect (default)c.globalCompositeOperation = "lighter";  // switch to additive color applicationc.lineWidth = 0.2;c.lineCap = "round";var bool = 0, t = 0; // thetad.onmousemove = function (e) {if(window.T) {if(D==9) { D=Math.random()*15; f(1); }clearTimeout(T);}X = e.pageX; // grab mouse pixel coordsY = e.pageY;a=0; // previous coord.xb=0; // previous coord.y A = X, // original coord.xB = Y; // original coord.yR=(e.pageX/W * 999>>0)/999;r=(e.pageY/H * 999>>0)/999;U=e.pageX/H * 360 >>0;D=9;g = 360 * Math.PI / 180;T = setInterval(f = function (e) { // start looping spectrumc.save();c.globalCompositeOperation = "source-over"; // switch to additive color applicationif(e!=1) {c.fillStyle = "rgba(0,0,0,0.02)";c.fillRect(0, 0, W, H); // resize <canvas> and draw black rect (default)}c.restore();i = 25; while(i --) {c.beginPath();if(D > 450 || bool) { // decrease diameterif(!bool) { // has hit maximumbool = 1;}if(D < 0.1) { // has hit minimumbool = 0;}t -= g; // decrease thetaD -= 0.1; // decrease size}if(!bool) {t += g; // increase thetaD += 0.1; // increase size}q = (R / r - 1) * t; // create hypotrochoid from current mouse position, and setup variables (see: http://en.wikipedia.org/wiki/Hypotrochoid)x = (R - r) * C(t) + D * C(q) + (A + (X - A) * (i / 25)) + (r - R); // center on xy coordsy = (R - r) * S(t) - D * S(q) + (B + (Y - B) * (i / 25));if (a) { // draw once two points are setc.moveTo(a, b);c.lineTo(x, y)}c.strokeStyle = "hsla(" + (U % 360) + ",100%,50%,0.75)"; // draw rainbow hypotrochoidc.stroke();a = x; // set previous coord.xb = y; // set previous coord.y}U -= 0.5; // increment hueA = X; // set original coord.xB = Y; // set original coord.y}, 16);}j.onkeydown = function(e) { a=b=0; R += 0.05 }d.onmousemove({pageX:300, pageY:290})}</script></head><body style="margin:0px;padding:0px;width:100%;height:100%;overflow:hidden;"><canvas id="c"></canvas></body></html>
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