Canvas draws circles and ellipses

Context context's arc method is to draw a circle or ellipse. The x and y parameters of the arc method are the center coordinates of the circle, radius is the radius, startAngle and endAngle are the starting angle and ending angle of the sector (expressed in radians), anticlockwise Indicates whether the drawing should be drawn counterclockwise (true) or clockwise (false).

The code is as follows:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>huatu</title>
<body>
<canvas id="demoCanvas" width="500" height="600"></canvas>
<script type="text/javascript">
    //通过id获得当前的Canvas对象
 var canvasDom = document.getElementById("demoCanvas");
    //通过Canvas Dom对象获取Context的对象
 var context = canvasDom.getContext("2d");
    context.beginPath();//开始绘制路径
    //绘制以 （60,60）为圆心，50为半径长度，从0度到360度（PI是180度），最后一个参数代表顺时针旋转。
 context.arc(60, 60, 50, 0, Math.PI * 2, true);
    context.lineWidth = 2.0;//线的宽度
 context.strokeStyle = "#000";//线的样式
 context.stroke();//绘制空心的，当然如果使用fill那就是填充了。
</script>
</body>
</html>

Continuing Learning

new file

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>huatu</title> <body> <canvas id="demoCanvas" width="500" height="600"></canvas> <script type="text/javascript"> //通过id获得当前的Canvas对象 var canvasDom = document.getElementById("demoCanvas"); //通过Canvas Dom对象获取Context的对象 var context = canvasDom.getContext("2d"); context.beginPath();//开始绘制路径 //绘制以（60,60）为圆心，50为半径长度，从0度到360度（PI是180度），最后一个参数代表顺时针旋转。 context.arc(60, 60, 50, 0, Math.PI * 2, true); context.lineWidth = 2.0;//线的宽度 context.strokeStyle = "#000";//线的样式 context.stroke();//绘制空心的，当然如果使用fill那就是填充了。 </script> </body> </html>

submit Reset Code

Automatic operation

Canvas draws circles and ellipses

ElementaryImperial CMS enterprise imitation website tutorial

ElementaryNewbies with zero foundation in WordPress build personal blogs and corporate websites

ElementaryUltimate CMS zero-based website building instruction video

ElementaryFront-end project-Shangyou [HTML/CSS/JS technology comprehensive practice]

IntermediateVue3.0 from 0 to build a universal backend management system project practice

ElementaryZero-based front-end course [Vue advanced learning and practical application]

ElementaryWEB front-end tutorial [HTML5+CSS3+JS]

ElementaryQuick introduction to apipost

IntermediateVue3+TypeScript practical tutorial-enterprise-level project practice

ElementaryLet's briefly talk about starting a business in PHP

IntermediateVUE e-commerce project (front-end & back-end dual project actual combat)

ElementaryApipost practical application [api, interface, automated testing, mock]