$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 Pie
    function 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 optimization
	if( $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
		$split=-1; // no split
		if( ($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
		// bonudaries

		if( $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)
	// counterclockwise
	    
	while( $angles[$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)
	// clockwise
	while( $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);
		$y = $labeldata[$i][2] - sin($la*M_PI/180)*($h+$margin);
		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 ) re