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canvas简易绘图的实现（海绵宝宝篇）
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最近在研究canvas，简单的用canvas绘制了一下卡通人物--海绵宝宝。

图片如下：

canvas简易绘图的实现（海绵宝宝篇）

代码如下：

<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8" />
  <title>canvas海绵宝宝</title>
 </head>
 <body>
  <canvas id="canvas" width="1000" height="700" style="background: #01539f;"></canvas>
 </body>
 <script>
  var canvas = document.getElementById("canvas");
  var ctx = canvas.getContext("2d");
  with(ctx){
   //袖子
   //左
   beginPath();
   fillStyle="#fff";
   strokeStyle="#000";
   lineWidth=2;
   bezierCurveTo(142,253,112,263,112,303)
   quadraticCurveTo(120,308,150,303)
   fill();
   stroke();
   closePath();
   //右
   beginPath();
   fillStyle="#fff";
   strokeStyle="#000";
   lineWidth=2;
   bezierCurveTo(445,253,477,263,477,303)
   quadraticCurveTo(467,308,447,303)
   fill();
   stroke();
   closePath();
   //胳膊
   //左
   beginPath();
   fillStyle="#f5e261";
   strokeStyle="#000";
   lineWidth=2;
   moveTo(122,306);
   lineTo(110,406);
   lineTo(120,406);
   lineTo(132,306);
   fill();
   stroke();
   closePath();
   //右
   beginPath();
   fillStyle="#f5e261";
   strokeStyle="#000";
   moveTo(458,306);
   lineTo(470,406);
   lineTo(480,406);
   lineTo(468,306);
   fill();
   stroke();
   closePath();
   //手
   //左
   //衣服
   beginPath();
   fillStyle="#fff";
   strokeStyle="#000";
   lineWidth=5;
   shadowColor = "#000"; 
   shadowOffsetX = 0; 
   shadowOffsetY = 0; 
   shadowBlur = 0; 
   moveTo(145,385);
   lineTo(146,425);
   lineTo(442,425);
   lineTo(443,385);
   stroke();
   fill();
   closePath();
   //裤子
   beginPath();
   fillStyle="#ae6f28";
   strokeStyle="#000";
   moveTo(146,427);
   lineTo(147,470);
   lineTo(441,470);
   lineTo(442,427);
   stroke();
   fill();
   closePath();
   //裤子图案
   beginPath();
   fillStyle="#000";
   rect(156,438,60,15);
   rect(236,438,120,15);
   rect(373,438,60,15);
   fill();
   closePath();
   //裤腿
   beginPath();
   fillStyle="#ae6f28";
   strokeStyle="#000";
   lineWidth=2;
   moveTo(190,472);
   lineTo(190,490);
   lineTo(235,490);
   lineTo(235,472);
   moveTo(350,472);
   lineTo(350,490);
   lineTo(395,490);
   lineTo(395,472);
   fill();
   stroke();
   closePath();
   //腿
   beginPath();
   fillStyle="#fffe71";
   strokeStyle="#000";
   lineWidth=2;
   moveTo(208,491);
   lineTo(208,516);
   lineTo(218,516);
   lineTo(218,491);
   moveTo(368,491);
   lineTo(368,516);
   lineTo(378,516);
   lineTo(378,491);
   fill();
   stroke();
   closePath();
   //袜子
   beginPath();
   fillStyle="#fff";
   strokeStyle="#000";
   lineWidth=2;
   moveTo(208,517);
   lineTo(207,560);
   lineTo(218,560);
   lineTo(218,517);
   moveTo(368,517);
   lineTo(368,560);
   lineTo(379,560);
   lineTo(378,517);
   fill();
   stroke();
   closePath();
   //蓝杠
   beginPath();
   strokeStyle="#536d92";
   lineWidth=4;
   moveTo(208,523);
   lineTo(218,523);
   moveTo(368,523);
   lineTo(378,523);
   stroke();
   closePath();
   //红杠
   beginPath();
   strokeStyle="#da4751";
   lineWidth=4;
   moveTo(209,530);
   lineTo(218,530);
   moveTo(369,530);
   lineTo(378,530);
   stroke();
   closePath();
   
   //领带
   beginPath();
   strokeStyle="#000";
   lineWidth=5;
   fillStyle="#ef4641";
   moveTo(270,385);
   lineTo(320,385);
   lineTo(298,413);
   lineTo(292,413);
   lineTo(270,385);
   moveTo(292,415);
   lineTo(280,446);
   lineTo(295,462);
   lineTo(310,446);
   lineTo(298,415);
   stroke();
   fill();
   closePath();
   //领子
   beginPath();
   strokeStyle="#000";
   fillStyle="#fff";
   moveTo(280,393);
   lineTo(265,410);
   lineTo(218,385);
   moveTo(310,393);
   lineTo(325,410);
   lineTo(362,385);
   stroke();
   fill();
   closePath();
   //脸
   beginPath();
   strokeStyle="#818620";
   fillStyle="#f5e262";
   lineWidth=5;
   bezierCurveTo(140,50,150,60,160,50);
   quadraticCurveTo(170,40,180,50);
   quadraticCurveTo(190,60,200,50);
   quadraticCurveTo(210,40,220,50);
   quadraticCurveTo(230,60,240,50);
   quadraticCurveTo(250,40,260,50);
   quadraticCurveTo(270,60,280,50);
   quadraticCurveTo(290,40,300,50);
   quadraticCurveTo(310,60,320,50);
   quadraticCurveTo(330,40,340,50);
   quadraticCurveTo(350,60,360,50);
   quadraticCurveTo(370,40,380,50);
   quadraticCurveTo(390,60,400,50);
   quadraticCurveTo(410,40,420,50);
   quadraticCurveTo(430,60,440,50);
   quadraticCurveTo(450,40,460,50);
   quadraticCurveTo(465,60,460,70);
   quadraticCurveTo(450,80,460,90);
   quadraticCurveTo(468,100,458,110);
   quadraticCurveTo(446,120,456,130);
   quadraticCurveTo(466,140,456,150);
   quadraticCurveTo(444,160,454,170);
   quadraticCurveTo(464,180,454,190);
   quadraticCurveTo(442,200,452,210);
   quadraticCurveTo(462,220,452,230);
   quadraticCurveTo(440,240,450,250);
   quadraticCurveTo(460,260,450,270);
   quadraticCurveTo(438,280,448,290);
   quadraticCurveTo(458,300,448,310);
   quadraticCurveTo(436,320,446,330);
   quadraticCurveTo(456,340,446,350);
   quadraticCurveTo(434,360,444,370);
   quadraticCurveTo(454,380,444,390);
   quadraticCurveTo(435,405,424,390);
   quadraticCurveTo(415,380,405,390);
   quadraticCurveTo(395,400,385,390);
   quadraticCurveTo(375,380,365,390);
   quadraticCurveTo(355,400,345,390);
   quadraticCurveTo(335,380,325,390);
   quadraticCurveTo(315,400,305,390);
   quadraticCurveTo(295,380,285,390);
   quadraticCurveTo(275,400,265,390);
   quadraticCurveTo(255,380,245,390);
   quadraticCurveTo(235,400,225,390);
   quadraticCurveTo(215,380,205,390);
   quadraticCurveTo(195,400,185,390);
   quadraticCurveTo(175,380,165,390);
   quadraticCurveTo(155,400,145,390);
   quadraticCurveTo(135,380,145,370);
   quadraticCurveTo(153,360,143,350);
   quadraticCurveTo(133,340,143,330);
   quadraticCurveTo(151,320,141,310);
   quadraticCurveTo(131,300,141,290);
   quadraticCurveTo(149,280,139,270);
   quadraticCurveTo(129,260,139,250);
   quadraticCurveTo(147,240,137,230);
   quadraticCurveTo(127,220,137,210);
   quadraticCurveTo(145,200,135,190);
   quadraticCurveTo(125,180,135,170);
   quadraticCurveTo(143,160,133,150);
   quadraticCurveTo(123,140,133,130);
   quadraticCurveTo(141,120,131,110);
   quadraticCurveTo(121,100,131,90);
   quadraticCurveTo(139,80,129,70);
   quadraticCurveTo(119,60,129,50);
   quadraticCurveTo(137,45,140,50);
   stroke();
   fill();
   closePath();
   //眼睛
   beginPath();
   strokeStyle="#000";
   fillStyle="#fff";
   arc(249,180,45,0,Math.PI*2,true);
   arc(341,180,45,0,Math.PI*2,true);
   stroke();
   fill();
   closePath();
   //眼仁
   beginPath();
   strokeStyle="#000";
   fillStyle="#50d1f1";
   arc(255,180,18,0,Math.PI*2,true);
   stroke();
   fill();
   closePath();
   beginPath();
   strokeStyle="#000";
   fillStyle="#50d1f1";
   arc(335,180,18,0,Math.PI*2,true);
   stroke();
   fill();
   closePath();
   //眼球
   beginPath();
   strokeStyle="#000";
   fillStyle="#000";
   arc(255,180,10,0,Math.PI*2,true);
   stroke();
   fill();
   closePath();
   beginPath();
   strokeStyle="#000";
   fillStyle="#000";
   arc(335,180,10,0,Math.PI*2,true);
   stroke();
   fill();
   closePath();
   //眼睫毛
   beginPath();
   lineWidth=6;
   strokeStyle="#000";
   moveTo(210,122);
   lineTo(223,142);
   moveTo(247,112);
   lineTo(247,133);
   moveTo(283,117);
   lineTo(270,140);
   moveTo(307,120);
   lineTo(320,140);
   moveTo(344,112);
   lineTo(344,133);
   moveTo(380,120);
   lineTo(365,140);
   stroke();
   closePath();
   //嘴角
   beginPath();
   fillStyle="#fdd06b"
   lineWidth=3;
   strokeStyle="#ca5939";
   moveTo(190,230);
   bezierCurveTo(160,175,265,190,230,230);
   stroke();
   fill();
   closePath();
   beginPath();
   fillStyle="#fdd06b"
   lineWidth=3;
   strokeStyle="#ca5939";
   moveTo(350,230);
   bezierCurveTo(325,175,435,190,395,230);
   stroke();
   fill();
   closePath();
   //牙
   beginPath();
   strokeStyle="#000";
   lineWidth=2;
   fillStyle="#fff";
   moveTo(275,272);
   lineTo(275,292);
   lineTo(295,292);
   lineTo(295,272);
   moveTo(300,272);
   lineTo(300,292);
   lineTo(320,292);
   lineTo(320,271);
   //rect(297,252,20,20);
   fill();
   stroke();
   closePath();
   //嘴
   beginPath();
   strokeStyle="#000";
   lineWidth=3;
   bezierCurveTo(210,220,290,340,380,220);
   stroke();
   closePath();
   beginPath();
   strokeStyle="#000";
   lineWidth=2;
   bezierCurveTo(205,225,205,215,220,220);
   stroke();
   closePath();
   beginPath();
   strokeStyle="#000";
   lineWidth=2;
   bezierCurveTo(370,220,380,215,385,225);
   stroke();
   closePath();
   //鼻子
   beginPath();
   strokeStyle="#000";
   lineWidth=3;
   fillStyle="#f5e262";
   moveTo(290,215);
   bezierCurveTo(265,170,340,185,300,225);
   stroke();
   fill();
   closePath();
   //下巴
   beginPath();
   strokeStyle="#cb662e";
   lineWidth=2;
   bezierCurveTo(250,305,270,330,290,310);
   quadraticCurveTo(300,305,310,310);
   quadraticCurveTo(330,330,350,305);
   shadowColor = "#cb662e"; 
   shadowOffsetX = 0; 
   shadowOffsetY = -3; 
   shadowBlur = 10; 
   stroke();
   closePath();
   //雀斑
   beginPath();
   fillStyle="#bf7627";
   arc(197,205,2,0,Math.PI*2,true);
   fill();
   closePath();
   beginPath();
   fillStyle="#bf7627";
   arc(210,214,2,0,Math.PI*2,true);
   fill();
   closePath();
   beginPath();
   fillStyle="#bf7627";
   arc(218,207,2,0,Math.PI*2,true);
   fill();
   closePath();
   beginPath();
   fillStyle="#bf7627";
   arc(367,205,2,0,Math.PI*2,true);
   fill();
   closePath();
   beginPath();
   fillStyle="#bf7627";
   arc(390,206,2,0,Math.PI*2,true);
   fill();
   closePath();
   beginPath();
   fillStyle="#bf7627";
   arc(380,213,2,0,Math.PI*2,true);
   fill();
   closePath();
   //皮鞋
   //左
   beginPath();
   strokeStyle="#000";
   fillStyle="#000";
   lineWidth=4;
   shadowColor = "#000"; 
   shadowOffsetX = 0; 
   shadowOffsetY = 0; 
   shadowBlur = 0; 
   arc(180,577,11,0,Math.PI*2,true);
   bezierCurveTo(185,560,197,575,207,560);
   moveTo(207,560);
   lineTo(217,560);
   quadraticCurveTo(227,570,217,585);
   quadraticCurveTo(197,580,180,585);
   quadraticCurveTo(207,561,185,570);
   rect(207,585,10,4)
   stroke();
   fill();
   //ctx.rotate( m * Math.PI / 180)
   closePath();
   //右
   beginPath();
   strokeStyle="#000";
   fillStyle="#000";
   lineWidth=4;
   shadowColor = "#000"; 
   shadowOffsetX = 0; 
   shadowOffsetY = 0; 
   shadowBlur = 0; 
   arc(405,577,11,0,Math.PI*2,true);
   bezierCurveTo(400,560,388,575,378,560);
   moveTo(378,560);
   lineTo(368,560);
   quadraticCurveTo(358,570,368,585);
   quadraticCurveTo(388,580,405,585);
   quadraticCurveTo(422,561,400,570);
   rect(368,585,10,4)
   stroke();
   fill();
   //ctx.rotate( m * Math.PI / 180)
   closePath();
   //白点
   beginPath();
   strokeStyle="#f5e262";
   fillStyle="#c4b127";
   fill();
   EvenCompEllipse(ctx, 160, 100, 10, 15);
   EvenCompEllipse(ctx, 150, 150, 5, 7);
   EvenCompEllipse(ctx, 200, 320, 7, 10)
   EvenCompEllipse(ctx, 225, 350, 11, 16)
   EvenCompEllipse(ctx, 425, 120, 11, 16)
   EvenCompEllipse(ctx, 410, 320, 9, 12)
   EvenCompEllipse(ctx, 380, 340, 6, 9)
   closePath();
  }
  function EvenCompEllipse(ctx, x, y, a, b)
  {
     ctx.save();
     //选择a、b中的较大者作为arc方法的半径参数
     var r = (a > b) ? a : b; 
     var ratioX = a / r; //横轴缩放比率
     var ratioY = b / r; //纵轴缩放比率
     ctx.scale(ratioX, ratioY); //进行缩放（均匀压缩）
     ctx.beginPath();
     //从椭圆的左端点开始逆时针绘制
     ctx.moveTo((x + a) / ratioX, y / ratioY);
     ctx.arc(x / ratioX, y / ratioY, r, 0, 2 * Math.PI);
     ctx.closePath();
     ctx.stroke();
     ctx.fill();
     ctx.restore();
  };
   
 </script>
</html>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。

标签：
canvas,绘图,海绵宝宝
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