Go to most recent revision | Blame | Last modification | View Log | RSS feed
<?php/*=======================================================================// File: JPGRAPH_PIE3D.PHP// Description: 3D Pie plot extension for JpGraph// Created: 2001-03-24// Ver: $Id: jpgraph_pie3d.php 955 2007-11-17 11:41:42Z ljp $//// Copyright (c) Aditus Consulting. All rights reserved.//========================================================================*///===================================================// CLASS PiePlot3D// Description: Plots a 3D pie with a specified projection// angle between 20 and 70 degrees.//===================================================class PiePlot3D extends PiePlot {var $labelhintcolor="red",$showlabelhint=true;var $angle=50;var $edgecolor="", $edgeweight=1;var $iThickness=false;//---------------// CONSTRUCTORfunction PiePlot3d(&$data) {$this->radius = 0.5;$this->data = $data;$this->title = new Text("");$this->title->SetFont(FF_FONT1,FS_BOLD);$this->value = new DisplayValue();$this->value->Show();$this->value->SetFormat('%.0f%%');}//---------------// PUBLIC METHODS// Set label arraysfunction SetLegends($aLegend) {$this->legends = array_reverse(array_slice($aLegend,0,count($this->data)));}function SetSliceColors($aColors) {$this->setslicecolors = $aColors;}function Legend(&$aGraph) {parent::Legend($aGraph);$aGraph->legend->txtcol = array_reverse($aGraph->legend->txtcol);}function SetCSIMTargets($aTargets,$aAlts='',$aWinTargets='') {$this->csimtargets = $aTargets;$this->csimwintargets = $aWinTargets;$this->csimalts = $aAlts;}// Should the slices be separated by a line? If color is specified as "" no line// will be used to separate pie slices.function SetEdge($aColor='black',$aWeight=1) {$this->edgecolor = $aColor;$this->edgeweight = $aWeight;}// Dummy function to make Pie3D behave in a similair way to 2Dfunction ShowBorder($exterior=true,$interior=true) {JpGraphError::RaiseL(14001);//('Pie3D::ShowBorder() . Deprecated function. Use Pie3D::SetEdge() to control the edges around slices.');}// Specify projection angle for 3D in degrees// Must be between 20 and 70 degreesfunction SetAngle($a) {if( $a<5 || $a>90 )JpGraphError::RaiseL(14002);//("PiePlot3D::SetAngle() 3D Pie projection angle must be between 5 and 85 degrees.");else$this->angle = $a;}function AddSliceToCSIM($i,$xc,$yc,$height,$width,$thick,$sa,$ea) { //Slice number, ellipse centre (x,y), height, width, start angle, end angle$sa *= M_PI/180;$ea *= M_PI/180;//add coordinates of the centre to the map$coords = "$xc, $yc";//add coordinates of the first point on the arc to the map$xp = floor($width*cos($sa)/2+$xc);$yp = floor($yc-$height*sin($sa)/2);$coords.= ", $xp, $yp";//If on the front half, add the thickness offsetif ($sa >= M_PI && $sa <= 2*M_PI*1.01) {$yp = floor($yp+$thick);$coords.= ", $xp, $yp";}//add coordinates every 0.2 radians$a=$sa+0.2;while ($a<$ea) {$xp = floor($width*cos($a)/2+$xc);if ($a >= M_PI && $a <= 2*M_PI*1.01) {$yp = floor($yc-($height*sin($a)/2)+$thick);} else {$yp = floor($yc-$height*sin($a)/2);}$coords.= ", $xp, $yp";$a += 0.2;}//Add the last point on the arc$xp = floor($width*cos($ea)/2+$xc);$yp = floor($yc-$height*sin($ea)/2);if ($ea >= M_PI && $ea <= 2*M_PI*1.01) {$coords.= ", $xp, ".floor($yp+$thick);}$coords.= ", $xp, $yp";$alt='';if( !empty($this->csimtargets[$i]) ) {$this->csimareas .= "<area shape=\"poly\" coords=\"$coords\" href=\"".$this->csimtargets[$i]."\"";if( !empty($this->csimwintargets[$i]) ) {$this->csimareas .= " target=\"".$this->csimwintargets[$i]."\" ";}if( !empty($this->csimalts[$i]) ) {$tmp=sprintf($this->csimalts[$i],$this->data[$i]);$this->csimareas .= "alt=\"$tmp\" title=\"$tmp\" ";}$this->csimareas .= " />\n";}}function SetLabels($aLabels,$aLblPosAdj="auto") {$this->labels = $aLabels;$this->ilabelposadj=$aLblPosAdj;}// Distance from the pie to the labelsfunction SetLabelMargin($m) {$this->value->SetMargin($m);}// Show a thin line from the pie to the label for a specific slicefunction ShowLabelHint($f=true) {$this->showlabelhint=$f;}// Set color of hint line to label for each slicefunction SetLabelHintColor($c) {$this->labelhintcolor=$c;}function SetHeight($aHeight) {$this->iThickness = $aHeight;}// Normalize Angle between 0-360function NormAngle($a) {// Normalize anle to 0 to 2M_PI//if( $a > 0 ) {while($a > 360) $a -= 360;}else {while($a < 0) $a += 360;}if( $a < 0 )$a = 360 + $a;if( $a == 360 ) $a=0;return $a;}// Draw one 3D pie slice at position ($xc,$yc) with height $zfunction Pie3DSlice(&$img,$xc,$yc,$w,$h,$sa,$ea,$z,$fillcolor,$shadow=0.65) {// Due to the way the 3D Pie algorithm works we are// guaranteed that any slice we get into this method// belongs to either the left or right side of the// pie ellipse. Hence, no slice will cross 90 or 270// point.if( ($sa < 90 && $ea > 90) || ( ($sa > 90 && $sa < 270) && $ea > 270) ) {JpGraphError::RaiseL(14003);//('Internal assertion failed. Pie3D::Pie3DSlice');exit(1);}$p[] = array();// Setup pre-calculated values$rsa = $sa/180*M_PI; // to Rad$rea = $ea/180*M_PI; // to Rad$sinsa = sin($rsa);$cossa = cos($rsa);$sinea = sin($rea);$cosea = cos($rea);// p[] is the points for the overall slice and// pt[] is the points for the top pie// Angular step when approximating the arc with a polygon train.$step = 0.05;if( $sa >= 270 ) {if( $ea > 360 || ($ea > 0 && $ea <= 90) ) {if( $ea > 0 && $ea <= 90 ) {// Adjust angle to simplify conditions in loops$rea += 2*M_PI;}$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cossa,$z+$yc-$h*$sinsa);$pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);for( $a=$rsa; $a < 2*M_PI; $a += $step ) {$tca = cos($a);$tsa = sin($a);$p[] = $xc+$w*$tca;$p[] = $z+$yc-$h*$tsa;$pt[] = $xc+$w*$tca;$pt[] = $yc-$h*$tsa;}$pt[] = $xc+$w;$pt[] = $yc;$p[] = $xc+$w;$p[] = $z+$yc;$p[] = $xc+$w;$p[] = $yc;$p[] = $xc;$p[] = $yc;for( $a=2*M_PI+$step; $a < $rea; $a += $step ) {$pt[] = $xc + $w*cos($a);$pt[] = $yc - $h*sin($a);}$pt[] = $xc+$w*$cosea;$pt[] = $yc-$h*$sinea;$pt[] = $xc;$pt[] = $yc;}else {$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cossa,$z+$yc-$h*$sinsa);$pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);$rea = $rea == 0.0 ? 2*M_PI : $rea;for( $a=$rsa; $a < $rea; $a += $step ) {$tca = cos($a);$tsa = sin($a);$p[] = $xc+$w*$tca;$p[] = $z+$yc-$h*$tsa;$pt[] = $xc+$w*$tca;$pt[] = $yc-$h*$tsa;}$pt[] = $xc+$w*$cosea;$pt[] = $yc-$h*$sinea;$pt[] = $xc;$pt[] = $yc;$p[] = $xc+$w*$cosea;$p[] = $z+$yc-$h*$sinea;$p[] = $xc+$w*$cosea;$p[] = $yc-$h*$sinea;$p[] = $xc;$p[] = $yc;}}elseif( $sa >= 180 ) {$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cosea,$z+$yc-$h*$sinea);$pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);for( $a=$rea; $a>$rsa; $a -= $step ) {$tca = cos($a);$tsa = sin($a);$p[] = $xc+$w*$tca;$p[] = $z+$yc-$h*$tsa;$pt[] = $xc+$w*$tca;$pt[] = $yc-$h*$tsa;}$pt[] = $xc+$w*$cossa;$pt[] = $yc-$h*$sinsa;$pt[] = $xc;$pt[] = $yc;$p[] = $xc+$w*$cossa;$p[] = $z+$yc-$h*$sinsa;$p[] = $xc+$w*$cossa;$p[] = $yc-$h*$sinsa;$p[] = $xc;$p[] = $yc;}elseif( $sa >= 90 ) {if( $ea > 180 ) {$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cosea,$z+$yc-$h*$sinea);$pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);for( $a=$rea; $a > M_PI; $a -= $step ) {$tca = cos($a);$tsa = sin($a);$p[] = $xc+$w*$tca;$p[] = $z + $yc - $h*$tsa;$pt[] = $xc+$w*$tca;$pt[] = $yc-$h*$tsa;}$p[] = $xc-$w;$p[] = $z+$yc;$p[] = $xc-$w;$p[] = $yc;$p[] = $xc;$p[] = $yc;$pt[] = $xc-$w;$pt[] = $z+$yc;$pt[] = $xc-$w;$pt[] = $yc;for( $a=M_PI-$step; $a > $rsa; $a -= $step ) {$pt[] = $xc + $w*cos($a);$pt[] = $yc - $h*sin($a);}$pt[] = $xc+$w*$cossa;$pt[] = $yc-$h*$sinsa;$pt[] = $xc;$pt[] = $yc;}else { // $sa >= 90 && $ea <= 180$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cosea,$z+$yc-$h*$sinea,$xc+$w*$cosea,$yc-$h*$sinea,$xc,$yc);$pt = array($xc,$yc,$xc+$w*$cosea,$yc-$h*$sinea);for( $a=$rea; $a>$rsa; $a -= $step ) {$pt[] = $xc + $w*cos($a);$pt[] = $yc - $h*sin($a);}$pt[] = $xc+$w*$cossa;$pt[] = $yc-$h*$sinsa;$pt[] = $xc;$pt[] = $yc;}}else { // sa > 0 && ea < 90$p = array($xc,$yc,$xc,$yc+$z,$xc+$w*$cossa,$z+$yc-$h*$sinsa,$xc+$w*$cossa,$yc-$h*$sinsa,$xc,$yc);$pt = array($xc,$yc,$xc+$w*$cossa,$yc-$h*$sinsa);for( $a=$rsa; $a < $rea; $a += $step ) {$pt[] = $xc + $w*cos($a);$pt[] = $yc - $h*sin($a);}$pt[] = $xc+$w*$cosea;$pt[] = $yc-$h*$sinea;$pt[] = $xc;$pt[] = $yc;}$img->PushColor($fillcolor.":".$shadow);$img->FilledPolygon($p);$img->PopColor();$img->PushColor($fillcolor);$img->FilledPolygon($pt);$img->PopColor();}function SetStartAngle($aStart) {if( $aStart < 0 || $aStart > 360 ) {JpGraphError::RaiseL(14004);//('Slice start angle must be between 0 and 360 degrees.');}$this->startangle = $aStart;}// Draw a 3D Piefunction Pie3D($aaoption,&$img,$data,$colors,$xc,$yc,$d,$angle,$z,$shadow=0.65,$startangle=0,$edgecolor="",$edgeweight=1) {//---------------------------------------------------------------------------// As usual the algorithm get more complicated than I originally// envisioned. I believe that this is as simple as it is possible// to do it with the features I want. It's a good exercise to start// thinking on how to do this to convince your self that all this// is really needed for the general case.//// The algorithm two draw 3D pies without "real 3D" is done in// two steps.// First imagine the pie cut in half through a thought line between// 12'a clock and 6'a clock. It now easy to imagine that we can plot// the individual slices for each half by starting with the topmost// pie slice and continue down to 6'a clock.//// In the algortithm this is done in three principal steps// Step 1. Do the knife cut to ensure by splitting slices that extends// over the cut line. This is done by splitting the original slices into// upto 3 subslices.// Step 2. Find the top slice for each half// Step 3. Draw the slices from top to bottom//// The thing that slightly complicates this scheme with all the// angle comparisons below is that we can have an arbitrary start// angle so we must take into account the different equivalence classes.// For the same reason we must walk through the angle array in a// modulo fashion.//// Limitations of algorithm:// * A small exploded slice which crosses the 270 degree point// will get slightly nagged close to the center due to the fact that// we print the slices in Z-order and that the slice left part// get printed first and might get slightly nagged by a larger// slice on the right side just before the right part of the small// slice. Not a major problem though.//---------------------------------------------------------------------------// Determine the height of the ellippse which gives an// indication of the inclination angle$h = ($angle/90.0)*$d;$sum = 0;for($i=0; $i<count($data); ++$i ) {$sum += $data[$i];}// Special optimizationif( $sum==0 ) return;if( $this->labeltype == 2 ) {$this->adjusted_data = $this->AdjPercentage($data);}// Setup the start$accsum = 0;$a = $startangle;$a = $this->NormAngle($a);//// Step 1 . Split all slices that crosses 90 or 270//$idx=0;$adjexplode=array();$numcolors = count($colors);for($i=0; $i<count($data); ++$i, ++$idx ) {$da = $data[$i]/$sum * 360;if( empty($this->explode_radius[$i]) )$this->explode_radius[$i]=0;$expscale=1;if( $aaoption == 1 )$expscale=2;$la = $a + $da/2;$explode = array( $xc + $this->explode_radius[$i]*cos($la*M_PI/180)*$expscale,$yc - $this->explode_radius[$i]*sin($la*M_PI/180) * ($h/$d) *$expscale );$adjexplode[$idx] = $explode;$labeldata[$i] = array($la,$explode[0],$explode[1]);$originalangles[$i] = array($a,$a+$da);$ne = $this->NormAngle($a+$da);if( $da <= 180 ) {// If the slice size is <= 90 it can at maximum cut across// one boundary (either 90 or 270) where it needs to be split$split=-1; // no splitif( ($da<=90 && ($a <= 90 && $ne > 90)) ||(($da <= 180 && $da >90) && (($a < 90 || $a >= 270) && $ne > 90)) ) {$split = 90;}elseif( ($da<=90 && ($a <= 270 && $ne > 270)) ||(($da<=180 && $da>90) && ($a >= 90 && $a < 270 && ($a+$da) > 270 )) ) {$split = 270;}if( $split > 0 ) { // split in two$angles[$idx] = array($a,$split);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;$angles[++$idx] = array($split,$ne);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;}else { // no split$angles[$idx] = array($a,$ne);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;}}else {// da>180// Slice may, depending on position, cross one or two// bonudariesif( $a < 90 )$split = 90;elseif( $a <= 270 )$split = 270;else$split = 90;$angles[$idx] = array($a,$split);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;//if( $a+$da > 360-$split ) {// For slices larger than 270 degrees we might cross// another boundary as well. This means that we must// split the slice further. The comparison gets a little// bit complicated since we must take into accound that// a pie might have a startangle >0 and hence a slice might// wrap around the 0 angle.// Three cases:// a) Slice starts before 90 and hence gets a split=90, but// we must also check if we need to split at 270// b) Slice starts after 90 but before 270 and slices// crosses 90 (after a wrap around of 0)// c) If start is > 270 (hence the firstr split is at 90)// and the slice is so large that it goes all the way// around 270.if( ($a < 90 && ($a+$da > 270)) ||($a > 90 && $a<=270 && ($a+$da>360+90) ) ||($a > 270 && $this->NormAngle($a+$da)>270) ) {$angles[++$idx] = array($split,360-$split);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;$angles[++$idx] = array(360-$split,$ne);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;}else {// Just a simple split to the previous decided// angle.$angles[++$idx] = array($split,$ne);$adjcolors[$idx] = $colors[$i % $numcolors];$adjexplode[$idx] = $explode;}}$a += $da;$a = $this->NormAngle($a);}// Total number of slices$n = count($angles);for($i=0; $i<$n; ++$i) {list($dbgs,$dbge) = $angles[$i];}//// Step 2. Find start index (first pie that starts in upper left quadrant)//$minval = $angles[0][0];$min = 0;for( $i=0; $i<$n; ++$i ) {if( $angles[$i][0] < $minval ) {$minval = $angles[$i][0];$min = $i;}}$j = $min;$cnt = 0;while( $angles[$j][1] <= 90 ) {$j++;if( $j>=$n) {$j=0;}if( $cnt > $n ) {JpGraphError::RaiseL(14005);//("Pie3D Internal error (#1). Trying to wrap twice when looking for start index");}++$cnt;}$start = $j;//// Step 3. Print slices in z-order//$cnt = 0;// First stroke all the slices between 90 and 270 (left half circle)// counterclockwisewhile( $angles[$j][0] < 270 && $aaoption !== 2 ) {list($x,$y) = $adjexplode[$j];$this->Pie3DSlice($img,$x,$y,$d,$h,$angles[$j][0],$angles[$j][1],$z,$adjcolors[$j],$shadow);$last = array($x,$y,$j);$j++;if( $j >= $n ) $j=0;if( $cnt > $n ) {JpGraphError::RaiseL(14006);//("Pie3D Internal Error: Z-Sorting algorithm for 3D Pies is not working properly (2). Trying to wrap twice while stroking.");}++$cnt;}$slice_left = $n-$cnt;$j=$start-1;if($j<0) $j=$n-1;$cnt = 0;// The stroke all slices from 90 to -90 (right half circle)// clockwisewhile( $cnt < $slice_left && $aaoption !== 2 ) {list($x,$y) = $adjexplode[$j];$this->Pie3DSlice($img,$x,$y,$d,$h,$angles[$j][0],$angles[$j][1],$z,$adjcolors[$j],$shadow);$j--;if( $cnt > $n ) {JpGraphError::RaiseL(14006);//("Pie3D Internal Error: Z-Sorting algorithm for 3D Pies is not working properly (2). Trying to wrap twice while stroking.");}if($j<0) $j=$n-1;$cnt++;}// Now do a special thing. Stroke the last slice on the left// halfcircle one more time. This is needed in the case where// the slice close to 270 have been exploded. In that case the// part of the slice close to the center of the pie might be// slightly nagged.if( $aaoption !== 2 )$this->Pie3DSlice($img,$last[0],$last[1],$d,$h,$angles[$last[2]][0],$angles[$last[2]][1],$z,$adjcolors[$last[2]],$shadow);if( $aaoption !== 1 ) {// Now print possible labels and add csim$img->SetFont($this->value->ff,$this->value->fs);$margin = $img->GetFontHeight()/2 + $this->value->margin ;for($i=0; $i < count($data); ++$i ) {$la = $labeldata[$i][0];$x = $labeldata[$i][1] + cos($la*M_PI/180)*($d+$margin)*$this->ilabelposadj;$y = $labeldata[$i][2] - sin($la*M_PI/180)*($h+$margin)*$this->ilabelposadj;if( $this->ilabelposadj >= 1.0 ) {if( $la > 180 && $la < 360 ) $y += $z;}if( $this->labeltype == 0 ) {if( $sum > 0 )$l = 100*$data[$i]/$sum;else$l = 0;}elseif( $this->labeltype == 1 ) {$l = $data[$i];}else {$l = $this->adjusted_data[$i];}if( isset($this->labels[$i]) && is_string($this->labels[$i]) )$l=sprintf($this->labels[$i],$l);$this->StrokeLabels($l,$img,$labeldata[$i][0]*M_PI/180,$x,$y,$z);$this->AddSliceToCSIM($i,$labeldata[$i][1],$labeldata[$i][2],$h*2,$d*2,$z,$originalangles[$i][0],$originalangles[$i][1]);}}//// Finally add potential lines in pie//if( $edgecolor=="" || $aaoption !== 0 ) return;$accsum = 0;$a = $startangle;$a = $this->NormAngle($a);$a *= M_PI/180.0;$idx=0;$img->PushColor($edgecolor);$img->SetLineWeight($edgeweight);$fulledge = true;for($i=0; $i < count($data) && $fulledge; ++$i ) {if( empty($this->explode_radius[$i]) )$this->explode_radius[$i]=0;if( $this->explode_radius[$i] > 0 ) {$fulledge = false;}}for($i=0; $i < count($data); ++$i, ++$idx ) {$da = $data[$i]/$sum * 2*M_PI;$this->StrokeFullSliceFrame($img,$xc,$yc,$a,$a+$da,$d,$h,$z,$edgecolor,$this->explode_radius[$i],$fulledge);$a += $da;}$img->PopColor();}function StrokeFullSliceFrame(&$img,$xc,$yc,$sa,$ea,$w,$h,$z,$edgecolor,$exploderadius,$fulledge) {$step = 0.02;if( $exploderadius > 0 ) {$la = ($sa+$ea)/2;$xc += $exploderadius*cos($la);$yc -= $exploderadius*sin($la) * ($h/$w) ;}$p = array($xc,$yc,$xc+$w*cos($sa),$yc-$h*sin($sa));for($a=$sa; $a < $ea; $a += $step ) {$p[] = $xc + $w*cos($a);$p[] = $yc - $h*sin($a);}$p[] = $xc+$w*cos($ea);$p[] = $yc-$h*sin($ea);$p[] = $xc;$p[] = $yc;$img->SetColor($edgecolor);$img->Polygon($p);// Unfortunately we can't really draw the full edge around the whole of// of the slice if any of the slices are exploded. The reason is that// this algorithm is to simply. There are cases where the edges will// "overwrite" other slices when they have been exploded.// Doing the full, proper 3D hidden lines stiff is actually quite// tricky. So for exploded pies we only draw the top edge. Not perfect// but the "real" solution is much more complicated.if( $fulledge && !( $sa > 0 && $sa < M_PI && $ea < M_PI) ) {if($sa < M_PI && $ea > M_PI)$sa = M_PI;if($sa < 2*M_PI && (($ea >= 2*M_PI) || ($ea > 0 && $ea < $sa ) ) )$ea = 2*M_PI;if( $sa >= M_PI && $ea <= 2*M_PI ) {$p = array($xc + $w*cos($sa),$yc - $h*sin($sa),$xc + $w*cos($sa),$z + $yc - $h*sin($sa));for($a=$sa+$step; $a < $ea; $a += $step ) {$p[] = $xc + $w*cos($a);$p[] = $z + $yc - $h*sin($a);}$p[] = $xc + $w*cos($ea);$p[] = $z + $yc - $h*sin($ea);$p[] = $xc + $w*cos($ea);$p[] = $yc - $h*sin($ea);$img->SetColor($edgecolor);$img->Polygon($p);}}}function Stroke(&$img,$aaoption=0) {$n = count($this->data);// If user hasn't set the colors use the theme arrayif( $this->setslicecolors==null ) {$colors = array_keys($img->rgb->rgb_table);sort($colors);$idx_a=$this->themearr[$this->theme];$ca = array();$m = count($idx_a);for($i=0; $i < $m; ++$i)$ca[$i] = $colors[$idx_a[$i]];$ca = array_reverse(array_slice($ca,0,$n));}else {$ca = $this->setslicecolors;}if( $this->posx <= 1 && $this->posx > 0 )$xc = round($this->posx*$img->width);else$xc = $this->posx ;if( $this->posy <= 1 && $this->posy > 0 )$yc = round($this->posy*$img->height);else$yc = $this->posy ;if( $this->radius <= 1 ) {$width = floor($this->radius*min($img->width,$img->height));// Make sure that the pie doesn't overflow the image border// The 0.9 factor is simply an extra margin to leave some space// between the pie an the border of the image.$width = min($width,min($xc*0.9,($yc*90/$this->angle-$width/4)*0.9));}else {$width = $this->radius * ($aaoption === 1 ? 2 : 1 ) ;}// Add a sanity check for widthif( $width < 1 ) {JpGraphError::RaiseL(14007);//("Width for 3D Pie is 0. Specify a size > 0");}// Establish a thickness. By default the thickness is a fifth of the// pie slice width (=pie radius) but since the perspective depends// on the inclination angle we use some heuristics to make the edge// slightly thicker the less the angle.// Has user specified an absolute thickness? In that case use// that insteadif( $this->iThickness ) {$thick = $this->iThickness;$thick *= ($aaoption === 1 ? 2 : 1 );}else$thick = $width/12;$a = $this->angle;if( $a <= 30 ) $thick *= 1.6;elseif( $a <= 40 ) $thick *= 1.4;elseif( $a <= 50 ) $thick *= 1.2;elseif( $a <= 60 ) $thick *= 1.0;elseif( $a <= 70 ) $thick *= 0.8;elseif( $a <= 80 ) $thick *= 0.7;else $thick *= 0.6;$thick = floor($thick);if( $this->explode_all )for($i=0; $i < $n; ++$i)$this->explode_radius[$i]=$this->explode_r;$this->Pie3D($aaoption,$img,$this->data, $ca, $xc, $yc, $width, $this->angle,$thick, 0.65, $this->startangle, $this->edgecolor, $this->edgeweight);// Adjust title positionif( $aaoption != 1 ) {$this->title->Pos($xc,$yc-$this->title->GetFontHeight($img)-$width/2-$this->title->margin, "center","bottom");$this->title->Stroke($img);}}//---------------// PRIVATE METHODS// Position the labels of each slicefunction StrokeLabels($label,&$img,$a,$xp,$yp,$z) {$this->value->halign="left";$this->value->valign="top";// Position the axis title.// dx, dy is the offset from the top left corner of the bounding box that sorrounds the text// that intersects with the extension of the corresponding axis. The code looks a little// bit messy but this is really the only way of having a reasonable position of the// axis titles.$img->SetFont($this->value->ff,$this->value->fs,$this->value->fsize);$h=$img->GetTextHeight($label);// For numeric values the format of the display value// must be taken into accountif( is_numeric($label) ) {if( $label >= 0 )$w=$img->GetTextWidth(sprintf($this->value->format,$label));else$w=$img->GetTextWidth(sprintf($this->value->negformat,$label));}else$w=$img->GetTextWidth($label);while( $a > 2*M_PI ) $a -= 2*M_PI;if( $a>=7*M_PI/4 || $a <= M_PI/4 ) $dx=0;if( $a>=M_PI/4 && $a <= 3*M_PI/4 ) $dx=($a-M_PI/4)*2/M_PI;if( $a>=3*M_PI/4 && $a <= 5*M_PI/4 ) $dx=1;if( $a>=5*M_PI/4 && $a <= 7*M_PI/4 ) $dx=(1-($a-M_PI*5/4)*2/M_PI);if( $a>=7*M_PI/4 ) $dy=(($a-M_PI)-3*M_PI/4)*2/M_PI;if( $a<=M_PI/4 ) $dy=(1-$a*2/M_PI);if( $a>=M_PI/4 && $a <= 3*M_PI/4 ) $dy=1;if( $a>=3*M_PI/4 && $a <= 5*M_PI/4 ) $dy=(1-($a-3*M_PI/4)*2/M_PI);if( $a>=5*M_PI/4 && $a <= 7*M_PI/4 ) $dy=0;$x = round($xp-$dx*$w);$y = round($yp-$dy*$h);// Mark anchor point for debugging/*$img->SetColor('red');$img->Line($xp-10,$yp,$xp+10,$yp);$img->Line($xp,$yp-10,$xp,$yp+10);*/$oldmargin = $this->value->margin;$this->value->margin=0;$this->value->Stroke($img,$label,$x,$y);$this->value->margin=$oldmargin;}} // Class/* EOF */?>