js绘图的问题

trest 2009-11-13 04:59:28

各位大虾有没有用JS绘图的好方法啊网上看了一下一种是用div设置style的方法来画线还有一种看不太明白
<object id=DirectDraw
classid="CLSID:369303C2-D7AC-11D0-89D5-00A0C90833E6"
style="positiion:absolute;top:0;left:0;width:320;height:200"
>
<param name="line0001" value="绘图指令1">
<param name="line0002" value="绘图指令2">
...
</object>
绘图指令分类：
(一)常见形状
1.矩形类 //rotation是以度为单位的旋转角度
Rect(x ,y, width, height, rotation) //矩形
Oval(x ,y, width, height, rotation) //椭圆
RoundRect(x ,y, width, height, arcWidth, arcHeight, rotation)
2.弧形类
Arc(x ,y, width, height, startAngle, arcAngle, rotation) //弧形
Pie(x ,y, width, height, startAngle, arcAngle, rotation) //饼图
3.多边形类
Polygon(nPoints, x1, y1, x2, y2, [x3, y3, ....], rotation) //闭合
Polyline(nPoints, x1, y1, x2, y2, [xn, yn, ....], rotation) //不闭合
(二)效果函数
1.线条效果
SetLineColor(r, g, b) //设置画线颜色
SetLineStyle(style) //style=(1:实线;2:虚线;0:隐藏)
2.填充效果
SetFillColor(r, g, b, backr, backg, backb)
SetFillStyle(style) //style=(1:实心;2:透明;3:-;4:|;5:\;6:/;7:+;8:x)
(三)文字输出函数
SetFont('字体',width,height,r,g,b) //设置字体
Text('要输出的文字内容', x,y,z) //输出文字

控制函数 //定义<object>后在<script></script>里使用。
引用格式：DirectDraw.FunctionName()
rotate(x-rotation, y-rotation, z-rotation) //旋转
scale(x-scale,y-scale,z-scale) //缩放
translate(x-coordinate,y-coordinate,z-coordinate) //平移
setIdentity() //复原
clear() //清除,清除后无法恢复！

这个不知道怎么用大家帮帮忙谢谢啦

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dh20156 2009-11-19

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也可以参考使用Canvas：



<canvas id="x" width="400" height="300" style="border:1px solid #eee;">hello,canvas!</canvas>

<script type="text/javascript" src="http://www.easyui.org.cn/easyui.js"></script>

<script type="text/javascript">

var dx = document.getElementById('x');

var client = navigator.userAgent+'\n'+navigator.appVersion+'\n\n';

var dimg = new Image();dimg.src = 'http://www.v-ec.com/ijc/jslab_logo.png';

var show = function(){

    if(!dx.getContext){alert(client+'不支持Canvas');return;}

    var dxC = dx.getContext('2d');

    dxC.fillStyle = '#00f';

    dxC.strokeStyle = '#f00';

    dxC.lineWidth = 2;



    easyUI.queue([

        function(){dxC.fillRect(0,0,400,300);},

        function(){dxC.clearRect(10,10,380,280);},

        function(){dxC.fillStyle='rgba(0,0,0,0.2)';dxC.fillRect(15, 15,  370, 30);},

        function(){dxC.strokeStyle='#AC904B';dxC.fillStyle='#EACA06';dxC.beginPath();dxC.moveTo(50,50);

            dxC.lineTo(80,100);dxC.lineTo(20,100);dxC.lineTo(50,50);dxC.fill();dxC.stroke();dxC.closePath();

        },

        function(){if(!dxC.fillText){alert(client+'不支持fillText');return;}dxC.fillStyle='#000';dxC.font = 'bold 30px Arial';dxC.fillText('!',46,90);},

        function(){dxC.strokeStyle='#2A66B2';dxC.fillStyle='#2D7FE2';dxC.beginPath();

            dxC.arc(120,75,25,0,Math.PI*2,true);dxC.fill();dxC.stroke();dxC.closePath();

        },

        function(){dxC.drawImage(dimg,50,150);}

    ],1000);

};



window.onload = show;

</script>