Why the line is not so clear?

Question

1.00/5 (1 vote)

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why the line is not so clear.i want to draw fine line.(Line drawn by javascript code is not clear.)

ASP.NET

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!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 runat="server">
    <title></title>
    <script type="text/javascript">
        window.onload = function () {
           // get the canvas DOM element by its ID
var canvas = document.getElementById("c");

var context = canvas.getContext("2d");

context.lineWidth =2;

context.strokeStyle = "blue";

context.moveTo(0,0);

context.lineTo(400,200);

context.stroke();
        };
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <canvas style=" border:2px solid red; width:500px; height:500px;" id="c"></canvas>
    </div>
    </form>
</body>
</html>

********************************************************
one more problem:

HTML

<!DOCTYPE html>
<html>
<body>



<script type="text/javascript">

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.moveTo(10,10);
ctx.lineTo(150,50);
ctx.lineTo(10,50);
ctx.stroke();

</script>

</body>
</html>

this code is working properly, but when the width and heigth are change to 500, it's not working why.ot working why.

Posted 14-Aug-12 5:13am

footballpardeep

Updated 14-Aug-12 9:06am

Christian Amado

v5

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Christian Amado · Answer 1 · 2012-08-14T05:16:00

Solution 1

HTML

<canvas style=" border:thin solid red; width:500px; height:500px;" id="c"></canvas>

Hope you find it useful.

Posted 14-Aug-12 5:16am

Christian Amado

Comments

Yvan Rodrigues 14-Aug-12 12:28pm

And if it's still not clear, your browser may be anti-aliasing the image.

Christian Amado 14-Aug-12 13:09pm

The question is fuzzy, anyway.

Sergey Alexandrovich Kryukov 14-Aug-12 16:03pm

Or just not clear. :-)
--SA

Christian Amado 14-Aug-12 16:05pm

So many clearance around here! May be opacity: 0% ;)

footballpardeep 14-Aug-12 14:21pm

i m not talking about border line, the line drawn on the canvas by javascript code is not clear.

Christian Amado 14-Aug-12 14:22pm

So, your question is unclear.

Christian Amado 14-Aug-12 14:38pm

Man, use the Improve question button. Thanks.