<body><div id="canvas-warp"> <canvas id="canvas" style="display: block; margin: 200px auto;"> 你的浏览器居然不支持Canvas! </canvas></div><script> window.onload = function () { var canvas = document.getElementById("canvas"); canvas.width = 400; canvas.height = 400; //获取上下文 var context = canvas.getContext("2d"); //用于画有填充色圆的函数 参数分别为圆心坐标 ，半径，起始与终止位置，线颜色，填充颜色 function drawCircle(x2, y2, r2, a2, b2, lineColor, FillColor) { context.beginPath(); context.arc(x2, y2, r2, a2, b2 * Math.PI); context.strokeStyle = lineColor; context.fillStyle = FillColor; context.fill(); //确认填充 context.stroke(); }; //用于画圆弧函数 默认线条为黑色 无填充 参数分别为：圆心x坐标，圆心y坐标，半径，开始位置，终止位置 function drawsArc(x, y, r, l1, l2) { context.beginPath(); context.arc(x, y, r, l1 * Math.PI, l2 * Math.PI); context.strokeStyle = "black"; context.stroke(); }; //用于画眼睛的函数 function darwEyes(x1, y1, a1, b1) { //参数分别为椭圆圆心位置 长轴 短轴 context.strokeStyle = "#754924" ParamEllipse(context, x1, y1, a1, b1); //椭圆 function ParamEllipse(context, x, y, a, b) { //使每次循环所绘制的路径（弧线）接近1像素 var step = (a > b) ? 1 / a : 1 / b; context.beginPath(); context.moveTo(x + a, y); //从椭圆的左端点开始绘制 for (var i = 0; i < 2 * Math.PI; i += step) { //参数为i，表示度数（弧度） context.lineTo(x + a * Math.cos(i), y + b * Math.sin(i)); } context.closePath(); context.fillStyle = "#754924"; context.fill(); context.stroke(); }; }; //脸 drawCircle(200, 200, 200, 0, 2, "#EEE685", "#FCF200"); //左眼 context.strokeStyle = "#754924" darwEyes(116, 130, 18, 25); drawCircle(110, 127, 12, 0, 2, "#754924", "#F5F5F5"); //右眼 darwEyes(296, 130, 18, 25); drawCircle(290, 127, 12, 0, 2, "#754924", "#F5F5F5"); //左眉毛 drawsArc(100, 100, 50, 1.3, 1.7); //右眉毛 drawsArc(300, 100, 50, 1.3, 1.7); //嘴巴 drawsArc(200, 120, 180, 0.3, 0.7); }</script></body> 
