-
-
- define("ANGLE_STEP", 5); //定义画椭圆弧时的角度步长
-
- function draw_getdarkcolor($img,$clr) //求$clr对应的暗色
- {
- $rgb = imagecolorsforindex($img,$clr);
- return array($rgb["red"]/2,$rgb["green"]/2,$rgb["blue"]/2);
- }
-
- function draw_getexy($a, $b, $d) //求角度$d对应的椭圆上的点坐标
- {
- $d = deg2rad($d);
- return array(round($a*Cos($d)), round($b*Sin($d)));
- }
-
- function draw_arc($img,$ox,$oy,$a,$b,$sd,$ed,$clr) //椭圆弧函数
- {
- $n = ceil(($ed-$sd)/ANGLE_STEP);
- $d = $sd;
- list($x0,$y0) = draw_getexy($a,$b,$d);
- for($i=0; $i {
- $d = ($d+ANGLE_STEP)>$ed?$ed:($d+ANGLE_STEP);
- list($x, $y) = draw_getexy($a, $b, $d);
- imageline($img, $x0+$ox, $y0+$oy, $x+$ox, $y+$oy, $clr);
- $x0 = $x;
- $y0 = $y;
- }
- }
-
- function draw_sector($img, $ox, $oy, $a, $b, $sd, $ed, $clr) //画扇面
- {
- $n = ceil(($ed-$sd)/ANGLE_STEP);
- $d = $sd;
- list($x0,$y0) = draw_getexy($a, $b, $d);
- imageline($img, $x0+$ox, $y0+$oy, $ox, $oy, $clr);
- for($i=0; $i {
- $d = ($d+ANGLE_STEP)>$ed?$ed:($d+ANGLE_STEP);
- list($x, $y) = draw_getexy($a, $b, $d);
- imageline($img, $x0+$ox, $y0+$oy, $x+$ox, $y+$oy, $clr);
- $x0 = $x;
- $y0 = $y;
- }
- imageline($img, $x0+$ox, $y0+$oy, $ox, $oy, $clr);
- list($x, $y) = draw_getexy($a/2, $b/2, ($d+$sd)/2);
- imagefill($img, $x+$ox, $y+$oy, $clr);
- }
-
- function draw_sector3d($img, $ox, $oy, $a, $b, $v, $sd, $ed, $clr) //3d扇面
- {
- draw_sector($img, $ox, $oy, $a, $b, $sd, $ed, $clr);
- if($sd {
- list($R, $G, $B) = draw_getdarkcolor($img, $clr);
- $clr=imagecolorallocate($img, $R, $G, $B);
- if($ed>180) $ed = 180;
- list($sx, $sy) = draw_getexy($a,$b,$sd);
- $sx += $ox;
- $sy += $oy;
- list($ex, $ey) = draw_getexy($a, $b, $ed);
- $ex += $ox;
- $ey += $oy;
- imageline($img, $sx, $sy, $sx, $sy+$v, $clr);
- imageline($img, $ex, $ey, $ex, $ey+$v, $clr);
- draw_arc($img, $ox, $oy+$v, $a, $b, $sd, $ed, $clr);
- list($sx, $sy) = draw_getexy($a, $b, ($sd+$ed)/2);
- $sy += $oy+$v/2;
- $sx += $ox;
- imagefill($img, $sx, $sy, $clr);
- }
- }
-
- function draw_getindexcolor($img, $clr) //RBG转索引色
- {
- $R = ($clr>>16) & 0xff;
- $G = ($clr>>8)& 0xff;
- $B = ($clr) & 0xff;
- return imagecolorallocate($img, $R, $G, $B);
- }
-
- // 绘图主函数,并输出图片
- // $datLst 为数据数组, $datLst 为标签数组, $datLst 为颜色数组
- // 以上三个数组的维数应该相等
- function draw_img($datLst,$labLst,$clrLst,$a=250,$b=120,$v=20,$font=10)
- {
- $ox = 5+$a;
- $oy = 5+$b;
- $fw = imagefontwidth($font);
- $fh = imagefontheight($font);
-
- $n = count($datLst);//数据项个数
-
- $w = 10+$a*2;
- $h = 10+$b*2+$v+($fh+2)*$n;
-
- $img = imagecreate($w, $h);
-
- //转RGB为索引色
- for($i=0; $i $clrLst[$i] = draw_getindexcolor($img,$clrLst[$i]);
-
- $clrbk = imagecolorallocate($img, 0xff, 0xff, 0xff);
- $clrt = imagecolorallocate($img, 0x00, 0x00, 0x00);
-
- //填充背景色
- imagefill($img, 0, 0, $clrbk);
-
- //求和
- $tot = 0;
- for($i=0; $i $tot += $datLst[$i];
-
- $sd = 0;
- $ed = 0;
- $ly = 10+$b*2+$v;
- for($i=0; $i {
- $sd = $ed;
- $ed += $datLst[$i]/$tot*360;
-
- //画圆饼
- draw_sector3d($img, $ox, $oy, $a, $b, $v, $sd, $ed, $clrLst[$i]); //$sd,$ed,$clrLst[$i]);
-
- //画标签
- imagefilledrectangle($img, 5, $ly, 5+$fw, $ly+$fh, $clrLst[$i]);
- imagerectangle($img, 5, $ly, 5+$fw, $ly+$fh, $clrt);
- //imagestring($img, $font, 5+2*$fw, $ly, $labLst[$i].":".$datLst[$i]."(".(round(10000*($datLst[$i]/$tot))/100)."%)", $clrt);
-
- $str = iconv("GB2312", "UTF-8", $labLst[$i]);
- ImageTTFText($img, $font, 0, 5+2*$fw, $ly+13, $clrt, "./simsun.ttf", $str.":".$datLst[$i]."(".(round(10000*($datLst[$i]/$tot))/100)."%)");
- $ly += $fh+2;
- }
-
- //输出图形
- header("Content-type: image/png");
-
- //输出生成的图片
- $imgFileName = "temp/".time().".png";
- imagepng($img,$imgFileName);
- echo '';
- }
- ?>
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2、调用方法:
-
-
- require_once ("piefunction.php");
-
- $datLst = array(10,110,300); //数据
- $labLst = array("好评","中评","差评"); //标签
- $clrLst = array(0x99ff00, 0xff6666, 0x0099ff);
-
- draw_img($datLst,$labLst,$clrLst);
- ?>
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说明:
只要数据的个数与后面的标签,颜色个数一致就可以输出正确的饼状图效果了。
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