PHP物件程式設計實現3D餅圖 (轉)

PHP物件程式設計實現3D餅圖 (轉)[@more@]作者：student


//公用

//把角度轉換為弧度
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));
}

// 取得在橢圓心為（0，0）的橢圓上 x,y點的值
function pie_point($deg,$va,$vb){
$x= cos(deg2Arc($deg)) * $va;
$y= sin(deg2Arc($deg)) * $vb;
return (array($x, $y));
}


//3D餅圖類

class Pie3d{

var $a; //橢圓長半軸
var $b; //橢圓短半軸
var $DataArray; //每個扇形的資料
var $ColorArray; //每個扇形的顏色 要求按照十六進位制書寫但前面不加0x
//為邊緣及陰影為黑色

function Pie3d($pa=100,$pb=60,$sData="100,200,300,400,500", $lor="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;$iDataArray[$i]; //算出資料和

//填充背境
imagefill($image, 0, 0, imagecolorallocate($image, 0xFF, 0xFF, 0xFF));

/*
** 畫每一個扇形
*/
$Degrees = 0;
for($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,$B);
//畫扇形弧
imagearc($image,$PieCenterX,$PieCenterY,$DoubleA,$DoubleB,$StartDegrees,$EndDegrees,$CurrentColor);
//畫直線
list($ArcX, $ArcY) = pie_point($StartDegrees , $this->a , $this->b);
imageline($image,$PieCenterX,$PieCenterY,floor($PieCenterX + $ArcX),floor($PieCenterY + $ArcY),$CurrentColor);
//畫直線
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);

//畫陰影
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);
}

}
}

/*到此指令碼已經生了一幅影像了
**現在需要的是把它發到上，重要的一點是要將標頭髮給瀏覽器，讓它知道是一個GIF。不然的話你只能看到一堆奇怪的亂碼
*/
//輸出生成的圖片
header("Content-type: image/gif");
imagegif($image);
imagedestroy($image);
}//End drawPie()
}//End class


//實現

$objp = new Pie3d();
$objp->DrawPie();
?>