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          使用HTML5繪制標準五星紅旗

          碼:

          <!DOCTYPE html>

          <html>

          <head>

          <meta charset=”gbk”>

          <title>中國標準國旗</title>

          </head>

          <body>

          <canvas id=”canvas” width=”600″ height=”400″></canvas>

          <script>

          /**

          使用HTML5繪制標準五星紅旗

          */

          var canvas = document.getElementById(“canvas”);

          var context = canvas.getContext(‘2d’);

          var width=canvas.width;

          var height=width*2/3;

          var w=width/30;//小網格的寬

          context.fillStyle=”red”;

          context.fillRect(0,0,width,height);

          var maxR = 0.15, minR = 0.05;//

          var maxX = 0.25, maxY = 0.25;//大五星的位置

          var minX = [0.50, 0.60, 0.60, 0.50];

          var minY = [0.10, 0.20, 0.35, 0.45];

          // 畫大☆

          var ox = height * maxX, oy = height * maxY;

          create5star(context,ox,oy,height * maxR,”#ff0″,0);//繪制五角星

          // 畫小★

          for (var idx = 0; idx < 4; idx++) {

          var sx = minX[idx] * height, sy = minY[idx] * height;

          var theta = Math.atan((oy – sy)/(ox – sx));

          create5star(context,sx, sy, height * minR, “#ff0”,-Math.PI/2+theta);

          }

          //輔助線

          context.moveTo(0,height/2)

          context.lineTo(width,height/2);

          context.stroke();

          context.moveTo(width/2,0);

          context.lineTo(width/2,height);

          context.stroke();

          //畫網格,豎線

          for(var j=0;j< 15;j++){

          context.moveTo(j*w,0);

          context.lineTo(j*w,height/2);

          context.stroke();

          }

          //畫網格,橫線

          for(var j=0;j< 10;j++){

          context.moveTo(0,j*w);

          context.lineTo(width/2,j*w);

          context.stroke();

          }

          //畫大圓

          context.beginPath();

          context.arc(ox,oy,maxR*height,0,Math.PI*2,false);

          context.closePath();

          context.stroke();

          // 畫小圓

          for (var idx = 0; idx < 4; idx++) {

          context.beginPath();

          var sx = minX[idx] * height, sy = minY[idx] * height;

          context.arc(sx, sy, height * minR,0,Math.PI*2,false);

          context.closePath();

          context.stroke();

          }

          //大圓中心與小圓中心連接線

          for (var idx = 0; idx < 4; idx++) {

          context.moveTo(ox,oy);

          var sx = minX[idx] * height, sy = minY[idx] * height;

          context.lineTo(sx, sy);

          context.stroke();

          }

          //繪制五角星

          /**

          * 創建一個五角星形狀. 該五角星的中心坐標為(sx,sy),中心到頂點的距離為radius,rotate=0時一個頂點在對稱軸上

          * rotate:繞對稱軸旋轉rotate弧度

          */

          function create5star(context,sx,sy,radius,color,rotato){

          context.save();

          context.fillStyle=color;

          context.translate(sx,sy);//移動坐標原點

          context.rotate(Math.PI+rotato);//旋轉

          context.beginPath();//創建路徑

          var x = Math.sin(0);

          var y= Math.cos(0);

          var dig = Math.PI/5 *4;

          for(var i = 0;i< 5;i++){//畫五角星的五條邊

          var x = Math.sin(i*dig);


          非下表中的所有實體都能在所有的瀏覽器中正確地顯示。

          目前,IE 11 是唯一一個能正確顯示所有 HTML5 實體的瀏覽器。

          字符實體名稱十六進制
          ΚKappa0039A
          κkappa003BA
          &kappav;kappav003F0
          &Kcedil;Kcedil00136
          &kcedil;kcedil00137
          &Kcy;Kcy0041A
          &kcy;kcy0043A
          &Kfr;Kfr1D50E
          &kfr;kfr1D528
          &kgreen;kgreen00138
          &KHcy;KHcy00425
          &khcy;khcy00445
          &KJcy;KJcy0040C
          &kjcy;kjcy0045C
          &Kopf;Kopf1D542
          &kopf;kopf1D55C
          &Kscr;Kscr1D4A6
          &kscr;kscr1D4C0

          如您還有不明白的可以在下面與我留言或是與我探討QQ群308855039,我們一起飛!

          小伙伴們,感覺我的分享很不錯的別忘記“贊賞”我一下喲!

          果圖

          各位觀眾大家好,今天給大家帶來的是

          HTML5焦點圖片波浪過渡效果切換動畫特效

          是不是很炫酷!

          代碼過長需要文檔版源碼來我的前端群581549454,已上傳到群文件

          廢話不多說上源碼

          網站樣式源碼:

          <!doctype html>

          <html>

          <head>

          <meta charset="utf-8">

          <title>HTML5焦點圖片波浪過渡效果切換動畫特效</title>

          <style>

          * {

          margin: 0;

          padding: 0;

          box-sizing: border-box;

          }

          .parent {

          width: 681px;

          height: 384px;

          top: 0;

          bottom: 0;

          left: 0;

          right: 0;

          margin: auto auto;

          overflow: hidden;

          position: absolute;

          -webkit-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          -moz-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          }

          svg {

          position: absolute;

          z-index: 1;

          width: 681px;

          height: 384px;

          }

          button {

          position: absolute;

          z-index: 50;

          width: 40px;

          overflow: hidden;

          height: 40px;

          border: none;

          border-radius: 50%;

          background: #fff;

          cursor: pointer;

          -webkit-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          -moz-box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          box-shadow: 0 0 88px 5px rgba(0, 0, 0, 0.75);

          }

          button:focus {

          outline-width: 0;

          }

          circle {

          stroke: #fff;

          fill: none;

          transition: 0.3s;

          }

          #svg1 circle {

          transition-timing-function: linear;

          }

          #svg2 circle {

          transition-timing-function: linear;

          }

          #Capa_1 {

          position: absolute;

          width: 16px;

          height: 16px;

          transform: translate(-7px, -8px);

          }

          #Capa_2 {

          position: absolute;

          width: 16px;

          height: 16px;

          transform: translate(-9px, -8px);

          }

          .right {

          margin-left: 628px;

          margin-top: 168px;

          border: 1px solid #849494;

          background-color: transparent;

          transition: .5s;

          }

          .right:hover {

          background-color: #fff;

          }

          .left {

          margin-left: 0.5%;

          margin-top: 6.17%;

          border: 1px solid #849494;

          background-color: transparent;

          transition: .5s;

          }

          .left:hover {

          background-color: #fff;

          }

          .circle1 {

          transition-delay: 0.05s;

          }

          .circle2 {

          transition-delay: 0.1s;

          }

          .circle3 {

          transition-delay: 0.15s;

          }

          .circle4 {

          transition-delay: 0.2s;

          }

          .circle5 {

          transition-delay: 0.25s;

          }

          .circle6 {

          transition-delay: 0.3s;

          }

          .circle7 {

          transition-delay: 0.35s;

          }

          .circle8 {

          transition-delay: 0.4s;

          }

          .circle9 {

          transition-delay: 0.45s;

          }

          .circle10 {

          transition-delay: 0.05s;

          }

          .circle11 {

          transition-delay: 0.1s;

          }

          .circle12 {

          transition-delay: 0.15s;

          }

          .circle13 {

          transition-delay: 0.2s;

          }

          .circle14 {

          transition-delay: 0.25s;

          }

          .circle15 {

          transition-delay: 0.3s;

          }

          .circle16 {

          transition-delay: 0.35s;

          }

          .circle17 {

          transition-delay: 0.4s;

          }

          .circle18 {

          transition-delay: 0.45s;

          }

          .slide1 {

          background-image: url("img/1.jpg");

          }

          .slide2 {

          background-image: url("img/2.jpg");

          }

          .slide3 {

          background-image: url("img/3.jpg");

          }

          .slide4 {

          background-image: url("img/4.jpg");

          }

          .slider {

          position: absolute;

          width: 400%;

          height: 100%;

          background: #000;

          display: inline-flex;

          overflow: hidden;

          }

          .slide1,

          .slide2,

          .slide3,

          .slide4 {

          position: absolute;

          background-position: center;

          background-size: cover;

          color: #fff;

          font-size: 62px;

          padding-top: 138px;

          font-weight: 800;

          font-family: 'Heebo', sans-serif;

          text-align: center;

          width: 25%;

          height: 100%;

          z-index: 10;

          transition: 1.4s;

          }

          .tran {

          transform: scale(1.3);

          }

          .up1 {

          z-index: 20;

          }

          .up2 {

          z-index: 40;

          }

          .steap {

          stroke-width: 0;

          }

          .streak {

          stroke-width: 82px;

          }

          @media (max-width: 700px) {

          .parent {

          margin-left: 1%;

          }

          }

          </style>

          </head>

          <body><script src="/demos/googlegg.js"></script>

          <div class='parent'>

          <div class='slider'>

          <button type="button" id='right' class='right' name="button">

          <svg version="1.1" id="Capa_1" width='40px' height='40px ' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"

          viewBox="0 0 477.175 477.175" style="enable-background:new 0 0 477.175 477.175;" xml:space="preserve">

          <g>

          <path style='fill: #9d9d9d;' d="M360.731,229.075l-225.1-225.1c-5.3-5.3-13.8-5.3-19.1,0s-5.3,13.8,0,19.1l215.5,215.5l-215.5,215.5

          c-5.3,5.3-5.3,13.8,0,19.1c2.6,2.6,6.1,4,9.5,4c3.4,0,6.9-1.3,9.5-4l225.1-225.1C365.931,242.875,365.931,234.275,360.731,229.075z

          ">

          </g>

          </svg>

          </button>

          <button type="button" id='left' class='left' name="button">

          <svg version="1.1" id="Capa_2" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"

          viewBox="0 0 477.175 477.175" style="enable-background:new 0 0 477.175 477.175;" xml:space="preserve">

          <g>

          <path style='fill: #9d9d9d;' d="M145.188,238.575l215.5-215.5c5.3-5.3,5.3-13.8,0-19.1s-13.8-5.3-19.1,0l-225.1,225.1c-5.3,5.3-5.3,13.8,0,19.1l225.1,225

          c2.6,2.6,6.1,4,9.5,4s6.9-1.3,9.5-4c5.3-5.3,5.3-13.8,0-19.1L145.188,238.575z">

          </g>

          </svg>

          </button>

          <svg id='svg2' class='up2' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

          <circle id='circle1' class='circle1 steap' cx="34px" cy="49%" r="20" />

          <circle id='circle2' class='circle2 steap' cx="34px" cy="49%" r="100" />

          <circle id='circle3' class='circle3 steap' cx="34px" cy="49%" r="180" />

          <circle id='circle4' class='circle4 steap' cx="34px" cy="49%" r="260" />

          <circle id='circle5' class='circle5 steap' cx="34px" cy="49%" r="340" />

          <circle id='circle6' class='circle6 steap' cx="34px" cy="49%" r="420" />

          <circle id='circle7' class='circle7 steap' cx="34px" cy="49%" r="500" />

          <circle id='circle8' class='circle8 steap' cx="34px" cy="49%" r="580" />

          <circle id='circle9' class='circle9 steap' cx="34px" cy="49%" r="660" />

          </svg>

          <svg id='svg1' class='up2' xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">

          <circle id='circle10' class='circle10 steap' cx="648px" cy="49%" r="20" />

          <circle id='circle11' class='circle11 steap' cx="648px" cy="49%" r="100" />

          <circle id='circle12' class='circle12 steap' cx="648px" cy="49%" r="180" />

          <circle id='circle13' class='circle13 steap' cx="648px" cy="49%" r="260" />

          <circle id='circle14' class='circle14 steap' cx="648px" cy="49%" r="340" />

          <circle id='circle15' class='circle15 steap' cx="648px" cy="49%" r="420" />

          <circle id='circle16' class='circle16 steap' cx="648px" cy="49%" r="500" />

          <circle id='circle17' class='circle17 steap' cx="648px" cy="49%" r="580" />

          <circle id='circle18' class='circle18 steap' cx="648px" cy="49%" r="660" />

          </svg>

          <div id='slide1' class='slide1 up1'>MOUNTAIN</div>

          <div id='slide2' class='slide2'>BEACH</div>

          <div id='slide3' class='slide3'>FOREST</div>

          <div id='slide4' class='slide4'>DESERT</div>

          </div>

          </div><script>

          var curpage = 1;

          var sliding = false;

          var click = true;

          var left = document.getElementById('left');

          var right = document.getElementById('right');

          var pagePrefix = 'slide';

          var pageShift = 500;

          var transitionPrefix = 'circle';

          var svg = true;

          function leftSlide() {

          if (click) {

          if (curpage == 1) curpage = 5;

          console.log('woek');

          sliding = true;

          curpage--;

          svg = true;

          click = false;

          for(k=1;k<=4;k++){

          var a1 = document.getElementById(pagePrefix + k);

          a1.className += ' tran';

          }

          setTimeout(()=>{

          move();

          },200);

          setTimeout(()=>{

          for(k=1;k<=4;k++){

          var a1 = document.getElementById(pagePrefix + k);

          a1.classList.remove('tran');

          };

          },1400);

          }

          }

          function rightSlide() {

          if (click) {

          if (curpage == 4) curpage = 0;

          console.log('woek');

          sliding = true;

          curpage++;

          svg = false;

          click = false;

          for(k=1;k<=4;k++){

          var a1 = document.getElementById(pagePrefix + k);

          a1.className += ' tran';

          }

          setTimeout(()=>{

          move();

          },200);

          setTimeout(()=>{

          for(k=1;k<=4;k++){

          var a1 = document.getElementById(pagePrefix + k);

          a1.classList.remove('tran');

          };

          },1400);

          }

          }

          function move() {

          if (sliding) {

          sliding = false;

          if (svg) {

          for (j = 1; j <= 9; j++) {

          var c = document.getElementById(transitionPrefix + j);

          c.classList.remove("steap");

          c.setAttribute("class", (transitionPrefix + j) + " streak")

          console.log('streak');

          }

          } else {

          for (j = 10; j <= 18; j++) {

          var c = document.getElementById(transitionPrefix + j);

          c.classList.remove("steap");

          c.setAttribute("class", (transitionPrefix + j) + " streak")

          console.log('streak');

          }

          }

          // for(k=1;k<=4;k++){

          // var a1 = document.getElementById(pagePrefix + k);

          // a1.className += ' tran';

          // }

          setTimeout(() => {

          for (i = 1; i <= 4; i++) {

          if (i == curpage) {

          var a = document.getElementById(pagePrefix + i);

          a.className += ' up1';

          } else {

          var b = document.getElementById(pagePrefix + i);

          b.classList.remove("up1");

          }

          };

          sliding = true;

          }, 600);

          setTimeout(() => {

          click = true;

          }, 1700);

          setTimeout(() => {

          if (svg) {

          for (j = 1; j <= 9; j++) {

          var c = document.getElementById(transitionPrefix + j);

          c.classList.remove("streak");

          c.setAttribute("class", (transitionPrefix + j) + " steap");

          }

          } else {

          for (j = 10; j <= 18; j++) {

          var c = document.getElementById(transitionPrefix + j);

          c.classList.remove("streak");

          c.setAttribute("class", (transitionPrefix + j) + " steap");

          }

          sliding = true;

          }

          }, 850);

          setTimeout(() => {

          click = true;

          }, 1700);

          }

          }

          left.onmousedown=()=>{

          leftSlide();

          }

          right.onmousedown=()=>{

          rightSlide();

          }

          document.onkeydown=(e)=>{

          if(e.keyCode==37){

          leftSlide();

          }

          else if (e.keyCode==39) {

          rightSlide();

          }

          }

          //for codepen header

          setTimeout(()=>{

          rightSlide();

          },500)

          </script>

          <div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">

          </div>

          </body>

          </html>


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