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显示饼图的问题

http://www.iyit.net 日期：2006-10-6 15:37:11 来源：iyit.net收集点击：

【参加讨论】
显示饼图正常，只是将vote2和vote3不能分开，两种颜色混淆了，只显示vote2的颜色，vote3黄色显示为vote2的橙色，大家帮忙看看

查看饼图url:
http://localhost/poll/voteimg.php?vote1=1&vote2=1&vote3=1&vote4=1&vote5=1
通过get方法传递值

代码：
<?php
$vote1 = $_get['vote1'];
$vote2 = $_get['vote2'];
$vote3 = $_get['vote3'];
$vote4 = $_get['vote4'];
$vote5 = $_get['vote5'];
$votez = $vote1+$vote2+$vote3+$vote4+$vote5;
if($vote1>0){
$vote1a = $vote1/$votez*360;
}
else{
$vote1a = 0;
}
if($vote2>0){
$vote2a = $vote2/$votez*360;
}
else{
$vote2a = 0;
}
if($vote3>0){
$vote3a = $vote3/$votez*360;
}
else{
$vote3a = 0;
}
if($vote4>0){
$vote4a = $vote4/$votez*360;
}
else{
$vote4a = 0;
}
if($vote5>0){
$vote5a = $vote5/$votez*360;
}
else{
$vote5a = 0;
}
$img_output=imagecreate(188,170);
$color0a = imagecolorallocate($img_output,255,255,255); //白色
$color0b = imagecolorallocate($img_output,0,0,0); //黑色
$color1a = imagecolorallocate($img_output,255,0,0); //红色a
$color1b = imagecolorallocate($img_output,200,0,0); //红色b
$color2a = imagecolorallocate($img_output,255,128,64); //橙色a
$color2b = imagecolorallocate($img_output,198,64,0); //橙色b
$color3a = imagecolorallocate($img_output,255,255,0); //黄色a
$color3b = imagecolorallocate($img_output,200,200,0); //黄色b
$color4a = imagecolorallocate($img_output,133,248,18); //绿色a
$color4b = imagecolorallocate($img_output,0,200,0); //绿色b
$color5a = imagecolorallocate($img_output,0,0,255); //蓝色a
$color5b = imagecolorallocate($img_output,0,0,200); //蓝色b
imagecolortransparent($img_output,$color0a);
$picture_x = 93;
$picture_y = 80;
$picture_w = 180;
$picture_h = 140;
for($temp_a=$picture_y+11;$temp_a>$picture_y;$temp_a--){
if($vote5>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$temp_a,$temp_b,$temp_b*5/8,0,$vote5a,$color5b);
}
}
if($vote4>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$temp_a,$temp_b,$temp_b*5/8,$vote5a,$vote5a+$vote4a,$color4b);
}
}
if($vote3>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$temp_a,$temp_b,$temp_b*5/8,$vote5a+$vote4a,$vote5a+$vote4a+$vote3a,$color3b);
}
}
if($vote2>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$temp_a,$temp_b,$temp_b*5/8,$vote5a+$vote4a+vote3a,$vote5a+$vote4a+$vote3a+$vote2a,$color2b);
}
}
if($vote1>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$temp_a,$temp_b,$temp_b*5/8,$vote5a+$vote4a+$vote3a+$vote2a,360,$color1b);
}
}
}
if($vote5>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$picture_y,$temp_b,$temp_b*5/8,0,$vote5a,$color5a);
}
}
if($vote4>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$picture_y,$temp_b,$temp_b*5/8,$vote5a,$vote5a+$vote4a,$color4a);
}
}
if($vote3>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$picture_y,$temp_b,$temp_b*5/8,$vote5a+$vote4a,$vote5a+$vote4a+$vote3a,$color3a);
}
}
if($vote2>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$picture_y,$temp_b,$temp_b*5/8,$vote5a+$vote4a+vote3a,$vote5a+$vote4a+$vote3a+$vote2a,$color2a);
}
}
if($vote1>0){
for($temp_b=$picture_w;$temp_b>0;$temp_b--){
imagearc($img_output,$picture_x,$picture_y,$temp_b,$temp_b*5/8,$vote5a+$vote4a+$vote3a+$vote2a,360,$color1a);
}
}
header("content-type: image/png");
imagepng($img_output);
imagedestroy($img_output);
?>
---------------------------------------------------------------
你的算法太烦琐了
饼图是由多个扇形组成的。
画扇形是这样的：
1、画一弧
2、求出该弧在圆周上的两个端点的坐标
3、分别从圆心到弧的端点画线
4、视需要充填该区域
---------------------------------------------------------------
可以参考这个：http://unix.1816.net/bbs/read.php?fid=1&tid=12&fpage=2
<?php
class biscuitpicture3d//类名称
{
var $image;
var $width;
var $height;
var $x;
var $y;
var $z;
var $font;
var $percents;
var $darkcolors;
var $lightcolors;
function biscuitpicture3d( $width, $height, $width3d, $height3d, $startx, $starty, $startz ){
$this->image = imagecreate( $width, $height );
$white = imagecolorallocate( $this->image, 0xff, 0xff, 0xff );
$this->width = $width3d;
$this->height = $height3d;
$this->x = $startx;
$this->y = $starty;
$this->z = $startz;
$this->font = '/var/www/simsun.ttc'
}
function drawpic(){
$i = 0;
while( isset($this->percents[$i]) ){
$this->percents[$i] = 360 * $this->percents[$i] / 100;
$i++;
}
for ( $i = $this->y; $i > $this->y - $this->z; $i-- ){
$j = 0;
while( isset($this->percents[$j+1]) ){
if ( $j == 0 ){
imagefilledarc( $this->image, $this->x, $i, $this->width, $this->height, 0, $this->percents[$j], $this->darkcolors[$j], img_arc_pie );
}
else{
$startpos = 0;
for( $temp = 0; $temp < $j; $temp++ ){
$startpos = $startpos + $this->percents[$temp];
}
imagefilledarc( $this->image, $this->x, $i, $this->width, $this->height, $startpos, $this->percents[$j]+$startpos, $this->darkcolors[$j], img_arc_pie );
}
$j++;
}
imagefilledarc( $this->image, $this->x, $i, $this->width, $this->height, 360-$this->percents[$j], 360, $this->darkcolors[$j], img_arc_pie );
}
$j = 0;
while( isset($this->percents[$j+1]) ){
if ( $j == 0 ){
imagefilledarc( $this->image, $this->x, $this->y-$this->z, $this->width, $this->height, 0, $this->percents[$j], $this->lightcolors[$j], img_arc_pie );
}
else{
$startpos = 0;
for( $temp = 0; $temp < $j; $temp++ ){
$startpos = $startpos + $this->percents[$temp];
}
imagefilledarc( $this->image, $this->x, $this->y-$this->z, $this->width, $this->height, $startpos, $this->percents[$j]+$startpos, $this->lightcolors[$j], img_arc_pie );
}
$j++;
}
imagefilledarc( $this->image, $this->x, $this->y-$this->z, $this->width, $this->height, 360-$this->percents[$j], 360, $this->lightcolors[$j], img_arc_pie );
}
function showpic(){
header('content-type: image/png');
imagepng( $this->image );
imagedestroy( $this->image );
}
function additem( $percent, $r1, $g1, $b1, $r2, $g2, $b2 ){
$this->percents[] = $percent;
$this->darkcolors[] = imagecolorallocate( $this->image, $r1, $g1, $b1 );
$this->lightcolors[] = imagecolorallocate( $this->image, $r2, $g2, $b2 );
}
function writechinese( $str, $fontsize, $startx, $starty, $r, $g, $b ){
$str = iconv( "gb2312", "utf-8", $str );
$color = imagecolorallocate( $this->image, $r, $g, $b );
imagettftext( $this->image, $fontsize, 0, $startx, $starty, $color, $this->font, $str );}
}
$picwidth = 400;
$picheight = 400;
$width3d = 300;
$height3d = 100;
$x = $picwidth / 2;
$y = $picheight / 2;
$z = 40;
$b = new biscuitpicture3d( $picwidth, $picheight, $width3d, $height3d, $x, $y, $z );
$b->additem( 10, 0x90, 0x00, 0x00, 0xff, 0x00, 0x00 );
$b->additem( 15, 0xe1, 0xe1, 0x00, 0xff, 0xff, 0x00 );
$b->additem( 20, 0x00, 0x00, 0x50, 0x00, 0x00, 0x80 );
$b->additem( 25, 0x90, 0x90, 0x90, 0xc0, 0xc0, 0xc0 );
$b->additem( 30, 16, 185, 35, 16, 208, 35 );
$b->drawpic();
$b->writechinese( '3d饼状图', 22, 150, 350, 0, 0, 0 );
$b->showpic();
?>

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