PHP对象编程实现3D饼图-大鹏天空™

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<?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();
?>

PHP对象编程实现3D饼图
作者：	发布时间：04-11-22	浏览次数：885	[大中小]

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