PHP对象编程实现3D饼图

【 tulaoshi.com - PHP 】

  <?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){
  $R=($color16) & 0xff;
  $G=($color8) & 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,$B);
        if ($R60 and $R<256)            $R=$R-60;
        if ($G60 and $G<256)            $G=$G-60;
    &nb