html5 canvas路径绘制2

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>基本文件配置</title>
<script src="js/modernizr.js"></script>
</head>
 
<body>
<p>lineCap定义上下文中线的端点：</p>
 
<p>butt端点是垂直于线段边缘的平直边缘</p>
 
<p>round端点是在线段边缘处以线宽为直径的半圆</p>
 
<p>square：端点是在选段边缘处以线宽为长，以一般线宽为宽的矩形</p>
 
<p>lineJoin定义了两条线相交产生的拐角</p>
 
<p>miter 在连接外边缘盐城详解</p>
 
<p>bevel。连接处是一个对角线斜角</p>
 
<p>round。连接处是一个圆</p>
 
<script type="text/javascript">
window.addEventListener('load',eventWindowLoaded,false);
function eventWindowLoaded(){
    canvasApp();
}
function canvasSupport(){
    return Modernizr.canvas;
}
function canvasApp(){
    if(!canvasSupport()){
        return;
    }else{
        var theCanvas = document.getElementById('canvas')
        var context = theCanvas.getContext("2d")
 
    }
    drawScreen();
    function drawScreen(){
         
        //圆形端点，斜角连接
         context.strokeStyle="pink";
         context.lineWidth=10;
         context.lineJoin='bevel';
         context.lineCap='round';
         context.beginPath();
         context.moveTo(0,0);
         context.lineTo(25,0);
         context.lineTo(25,25);
         context.stroke();
         context.closePath();
          
          
         //round圆形端点，斜角链接
         context.beginPath();
         context.moveTo(10,50);
         context.lineTo(35,50);
         context.lineTo(35,75);
         context.stroke();
         context.closePath();
          
          
         //butt平直的端点，round圆形的链接
         context.lineJoin='round';
         context.lineCap='butt';
         context.beginPath();
         context.beginPath();
         context.moveTo(10,100);
         context.lineTo(35,100);
         context.lineTo(35,125);
         context.stroke();
         context.closePath();
   }
}
 
 
</script>
<canvas id="canvas" width="500" height="500">
你的浏览器无法使用canvas
如有疑问加QQ：1035417613;小白童鞋；你的支持是我最大的快乐！！
</canvas>
</body>
</html>

 

 

 效果如下

 

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>基本文件配置</title>
<script src="js/modernizr.js"></script>
</head>
 
<body>
 
 
<script type="text/javascript">
window.addEventListener('load',eventWindowLoaded,false);
function eventWindowLoaded(){
    canvasApp();
}
function canvasSupport(){
    return Modernizr.canvas;
}
function canvasApp(){
    if(!canvasSupport()){
        return;
    }else{
        var theCanvas = document.getElementById('canvas')
        var context = theCanvas.getContext("2d")
 
    }
    drawScreen();
    function drawScreen(){
         
        //圆形端点，斜角连接
         context.strokeStyle="pink";
         context.lineWidth=10;
         context.lineJoin='bevel';
         context.lineCap='round';
         context.beginPath();
         context.moveTo(50,20);
         context.lineTo(35,100);
         context.lineTo(55,150);
         context.stroke();
         context.closePath();
          
          
         context.beginPath();
         context.moveTo(25,65);
         context.lineTo(80,65);
         context.stroke();
         context.closePath();
         
         
         context.beginPath();
         context.moveTo(75,40);
         context.lineTo(60,100);
         context.lineTo(30,150);
         context.stroke();
         context.closePath();
          
         context.beginPath();
         context.moveTo(120,20);
         context.lineTo(120,150);
         context.stroke();
         context.closePath();
          
          
          
         context.beginPath();
         context.moveTo(100,55);
         context.lineTo(120,70);
         context.stroke();
         context.closePath();
          
         context.beginPath();
         context.moveTo(100,105);
         context.lineTo(120,80);
         context.stroke();
         context.closePath();
          
          
         context.beginPath();
         context.moveTo(140,20);
         context.lineTo(140,150);
         context.lineTo(180,150);
         context.lineTo(180,120);
         context.stroke();
         context.closePath();
          
         context.beginPath();
         context.moveTo(140,70);
         context.lineTo(160,55);
         context.stroke();
         context.closePath();
          
         context.beginPath();
         context.moveTo(140,85);
         context.lineTo(160,105);
         context.stroke();
         context.closePath();
   }
}
 
 
</script>
<canvas id="canvas" width="500" height="500">
你的浏览器无法使用canvas
如有疑问加QQ：1035417613;小白童鞋；你的支持是我最大的快乐！！
</canvas>
</body>
</html>

 效果吐槽一下这字画的竟然和我写的一样丑T_T无语了

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