如何在HTML5 Canvas中绘制云形状？

问题描述：

我正在使用HTML5 Canvas& javascript。但我不知道在HTML5Canvas中绘制CLOUD形状的计算。
我试图使用2点（即开始点和结束点）绘制CLOUD形状。
请提出一些想法？
感谢

I am working on drawing of different shapes using HTML5 Canvas & javascript. But i am not gettting the calculation for drawing CLOUD shape in HTML5Canvas. I am trying to draw CLOUD shape using 2 points (i.e. Start point & End point). kindly suggest some ideas? Thanks

答

链接： http://www.html5canvastutorials.com/advanced/html5-canvas -save-drawing-as-an-image /

<!DOCTYPE HTML>
<html>
  <head>
    <style>
      body {
        margin: 0px;
        padding: 0px;
      }
    </style>
  </head>
  <body>
    <canvas id="myCanvas" width="578" height="200" style="display:none;"></canvas>
    <img id="canvasImg" alt="Right click to save me!">
    <script>
      var canvas = document.getElementById('myCanvas');
      var context = canvas.getContext('2d');

      // draw cloud
      context.beginPath();
      context.moveTo(170, 80);
      context.bezierCurveTo(130, 100, 130, 150, 230, 150);
      context.bezierCurveTo(250, 180, 320, 180, 340, 150);
      context.bezierCurveTo(420, 150, 420, 120, 390, 100);
      context.bezierCurveTo(430, 40, 370, 30, 340, 50);
      context.bezierCurveTo(320, 5, 250, 20, 250, 50);
      context.bezierCurveTo(200, 5, 150, 20, 170, 80);
      context.closePath();
      context.lineWidth = 5;
      context.fillStyle = '#8ED6FF';
      context.fill();
      context.strokeStyle = '#0000ff';
      context.stroke();

      // save canvas image as data url (png format by default)
      var dataURL = canvas.toDataURL();

      // set canvasImg image src to dataURL
      // so it can be saved as an image
      document.getElementById('canvasImg').src = dataURL;

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

如何在HTML5 Canvas中绘制云形状？

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