canvas简易绘图的实现（海绵宝宝篇）

源码坊 · 发表于 2021-5-4 07:41:25

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：

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>

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