<?php 
  
  
//公用函数   
  
//把角度转换为弧度 
  
function deg2Arc($degrees) { 
  
return($degrees * (pi()/180.0)); 
  
}   
  
//RGB 
  
function getRGB($color){ 
  
  $R=($color>>16) & 0xff; 
  
  $G=($color>>8) & 0xff; 
  
  $B=($color) & 0xff; 
  
  return (array($R,$G,$B)); 
  
}   
  
// 取得在椭圆心为(0
,0)的椭圆上 x,y点的值 
  
function pie_point($deg,$va,$vb){ 
  
 $x= cos(deg2Arc($deg)) * $va; 
  
 $y= sin(deg2Arc($deg)) * $vb; 
  
 return (array($x, $y)); 
  
}   
  
  
//3D饼图类   
  
class Pie3d{   
  
var $a; //椭圆长半轴 
  
var $b; //椭圆短半轴 
  
var $DataArray;  //每个扇形的数据 
  
var $ColorArray; //每个扇形的颜色 要求按照十六进制书写但前面不加0x 
  
//为边缘及阴影为黑色   
  
function Pie3d($pa=100,$pb=60,$sData="100,200,300,400,500", $sColor="ee00ff,dd0000,cccccc,ccff00,00ccff") 
  
{ 
  
    $this->a=$pa; 
  
    $this->b=$pb; 
  
    $this->DataArray=split(",",$sData); 
  
    $this->ColorArray=split(",",$sColor); 
  
}   
  
function setA($v){ 
  
    $this->a=$v; 
  
}   
  
function getA(){ 
  
    return $this->a; 
  
}   
  
function setB($v){ 
  
    $this->b=$v;  
  
}   
  
function getB(){ 
  
    return $this->b; 
  
}   
  
function setDataArray($v){ 
  
    $this->DataArray=split(",",$v); 
  
}   
  
function getDataArray($v){ 
  
    return $this->DataArray; 
  
}   
  
function setColorArray($v){ 
  
    $this->ColorArray=split(",",$v); 
  
}   
  
function getColorArray(){ 
  
    return  $this->ColorArray; 
  
}   
  
  
  
function  DrawPie(){ 
  
    $image=imagecreate($this->a*2+40,$this->b*2+40); 
  
    $PieCenterX=$this->a+10; 
  
    $PieCenterY=$this->b+10; 
  
    $DoubleA=$this->a*2; 
  
    $DoubleB=$this->b*2; 
  
    list($R,$G,$B)=getRGB(0); 
  
    $colorBorder=imagecolorallocate($image,$R,$G,$B); 
  
    $DataNumber=count($this->DataArray);   
     
  
    //$DataTotal 
  
    for($i=0;$i<$DataNumber;$i++)      $DataTotal+=$this->DataArray[$i]; //算出数据和   
     
  
    //填充背境 
  
    imagefill($image, 0, 0, imagecolorallocate($image, 0xFF, 0xFF, 0xFF));   
  
    /* 
  
    ** 画每一个扇形 
  
    */ 
  
    $Degrees = 0; 
  
    for($i = 0; $i < $DataNumber; $i++){ 
  
        $StartDegrees = round($Degrees); 
  
        $Degrees += (($this->DataArray[$i]/$DataTotal)*360); 
  
        $EndDegrees = round($Degrees); 
  
        $percent = number_format($this->DataArray[$i]/$DataTotal*100, 1);  
  
        list($R,$G,$B)=getRGB(hexdec($this->ColorArray[$i])); 
  
        $CurrentColor=imagecolorallocate($image,$R,$G,$B); 
  
        if ($R>60 and $R<256)            $R=$R-60; 
  
        if ($G>60 and $G<256)            $G=$G-60; 
  
        if ($B>60 and $B<256)            $B=$B-60; 
  
        $CurrentDarkColor=imagecolorallocate($image,$R,$G,$B); 
  
        //画扇形弧 
  
        imagearc($image,$PieCenterX,$PieCenterY,$DoubleA,$DoubleB,$StartDegrees,$EndDegrees,$CurrentColor); 
  
        //画直线 
  
        list($ArcX, $ArcY) = pie_point($StartDegrees , $this->a , $this->b); 
  
        imageline($image,$PieCenterX,$PieCenterY,floor($PieCenterX + $ArcX),floor($PieCenterY + $ArcY),$CurrentColor); 
  
        //画直线 
  
        list($ArcX, $ArcY) = pie_point($EndDegrees,$this->a , $this->b); 
  
        imageline($image,$PieCenterX,$PieCenterY,ceil($PieCenterX + $ArcX),ceil($PieCenterY + $ArcY),$CurrentColor); 
  
        //填充扇形 
  
        $MidPoint = round((($EndDegrees - $StartDegrees)/2) + $StartDegrees); 
  
        list($ArcX, $ArcY) = Pie_point($MidPoint, $this->a*3/4 , $this->b*3/4);   
         
  
        imagefilltoborder($image,floor($PieCenterX + $ArcX),floor($PieCenterY + $ArcY), $CurrentColor,$CurrentColor); 
  
        imagestring($image,2,floor($PieCenterX + $ArcX-5),floor($PieCenterY + $ArcY-5),$percent."%",$colorBorder);   
  
        //画阴影 
  
        if ($StartDegrees>=0 and $StartDegrees<=180){ 
  
           if($EndDegrees<=180){     
  
               for($k = 1; $k < 15; $k++) 
  
                imagearc($image,$PieCenterX, $PieCenterY+$k,$DoubleA, $DoubleB, $StartDegrees, $EndDegrees, $CurrentDarkColor); 
  
           }else{ 
  
               for($k = 1; $k < 15; $k++) 
  
                imagearc($image,$PieCenterX, $PieCenterY+$k,$DoubleA, $DoubleB, $StartDegrees, 180, $CurrentDarkColor); 
  
           }   
  
        } 
  
   }   
         
  
    /*到此脚本已经生了一幅图像了 
  
    **现在需要的是把它发到浏览器上
,重要的一点是要将标头发给浏览器,让它知道是一个GIF文件
。不然的话你只能看到一堆奇怪的乱码 
  
    */  
  
    //输出生成的图片     
  
    header("Content-type: image/gif"); 
  
    imagegif($image); 
  
    imagedestroy($image); 
  
}//End drawPie() 
  
}//End class   
  
  
//实现   
  
$objp = new Pie3d(); 
  
$objp->DrawPie(); 
  
?>    
  
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