canvas一周1练

永利皇宫402 1
永利皇宫402

永利皇宫402,运转效果:

永利皇宫402 1

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<canvas id="drawing" width="800" height="600">A drawing of someing!</canvas>
    <script type="text/javascript">
        var drawing = document.getElementById('drawing');
        if(drawing.getContext) {
            //绘制奥运五环,画圆
            var context = drawing.getContext('2d');
            context.lineWidth = 7;
            context.strokeStyle = '#0180C3';
            context.beginPath();
            context.arc(70, 70, 40, 0, 2*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#000';
            context.beginPath();
            context.arc(160, 70, 40, 0, 2*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#BF0628';
            context.beginPath();
            context.arc(250, 70, 40, 0, 2*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#EBC41F';
            context.beginPath();
            context.arc(115, 110, 40, 0, 2*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#198E4A';
            context.beginPath();
            context.arc(205, 110, 40, 0, 2*Math.PI, false);
            context.stroke();
            //环环相扣,画弧(实现相关圆弧的覆盖)
            context.strokeStyle = '#0180C3';
            context.beginPath();
            context.arc(70, 70, 40, 1.9*Math.PI, 2.1*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#000';
            context.beginPath();
            context.arc(160, 70, 40, 1.9*Math.PI, 2.1*Math.PI, false);
            context.stroke();
            context.beginPath();
            context.arc(160, 70, 40, 0.5*Math.PI, 0.7*Math.PI, false);
            context.stroke();
            context.strokeStyle = '#BF0628';
            context.beginPath();
            context.arc(250, 70, 40, 0.5*Math.PI, 0.7*Math.PI, false);
            context.stroke();
        }

    </script>
</body>
</html>    

 

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