- <?php
- //公用函數
- //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 chart{
- var $a; //橢圓長半軸
- var $b; //橢圓短半軸
- var $DataArray; //每個扇形的數據
- var $ColorArray; //每個扇形的顏色 要求按照十六進制書寫但前面不加0x
- //為邊緣及陰影為黑色
- function chart($pa=100,$pb=60,$sData="100,200,300,400,500,300", $sColor="ee00ff,dd0000,cccccc,ccff00,00ccff,ccff00")
- {
- $this->a=$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[$i]; //算出數據和
- //填充背境
- imagefill($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, $CurrentDarkColor);
- }
- }
- }
- /*到此腳本已經生了一幅圖像了
- **現在需要的是把它發到瀏覽器上,重要的一點是要將標頭發給瀏覽器,讓它知道是一個GIF文件。不然的話你只能看到一堆奇怪的亂碼
- */
- //輸出生成的圖片
- header("Content-type: image/gif");
- imagegif($image);
- imagedestroy($image);
- }//End drawPie()
- }//End class
- //開源代碼Vevb.com
- //實現
- $objp = new chart();
- $objp->DrawPie();
- ?>
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