canvas-5Bezier-QuadraticCurveTo.html

时间：2015-11-20 19:16:49 收藏：0 阅读：233

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
    <canvas id="canvas" style="margin:0 auto;border:1px #ddd solid">
        The current browser does not support Canvas, can replace the browser a try!
    </canvas>

    <script>

        window.onload = function(){
            var canvas = document.getElementById(‘canvas‘);

            canvas.width = 1024;
            canvas.height = 768;

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

                context.lineWidth = 5;

                //案例 ：2arcTo里面注释
    

            }else{
                alert(‘当前游览器不支持Canvas，请更换游览器后再试！‘);
            }
        }

    </script>
</body>
<script>
    /*贝塞尔二次曲线

        
        起始点（x0,y0）
        控制点（x1,y1）
        终止点（x2,y2）
        context.moveTo(x0,y0);
        context.quadraticCurveTo(x1,y1,x2,y2);
        
    */
</script>
</html>

原文：http://www.cnblogs.com/cynthia-wuqian/p/4981646.html