<?php
/*=======================================================================
// File:	JPGRAPH_PIE3D.PHP
// Description: 3D Pie plot extension for JpGraph
// Created: 	2001-03-24
// Ver:		$Id: jpgraph_pie3d.php 956 2007-11-17 13:19:20Z 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
{
    private $labelhintcolor="red";
    private $showlabelhint=true;
    private $angle=50;
    private $edgecolor="";
    
    private $edgeweight=1;
    private $iThickness=false;
    
    //---------------
    // CONSTRUCTOR
    public function 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 arrays
    public function SetLegends($aLegend)
    {
        $this->legends = array_reverse(array_slice($aLegend, 0, count($this->data)));
    }

    public function SetSliceColors($aColors)
    {
        $this->setslicecolors = $aColors;
    }

    public function Legend($aGraph)
    {
        parent::Legend($aGraph);
        $aGraph->legend->txtcol = array_reverse($aGraph->legend->txtcol);
    }

    public 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.
    public function SetEdge($aColor='black', $aWeight=1)
    {
        $this->edgecolor = $aColor;
        $this->edgeweight = $aWeight;
    }

    // Dummy function to make Pie3D behave in a similair way to 2D
    public function 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 degrees
    public function 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;
        }
    }

    public function Add3DSliceToCSIM($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 offset
        if ($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";
        }
    }

    public function SetLabels($aLabels, $aLblPosAdj="auto")
    {
        $this->labels = $aLabels;
        $this->ilabelposadj=$aLblPosAdj;
    }

    
    // Distance from the pie to the labels
    public function SetLabelMargin($m)
    {
        $this->value->SetMargin($m);
    }
    
    // Show a thin line from the pie to the label for a specific slice
    public function ShowLabelHint($f=true)
    {
        $this->showlabelhint=$f;
    }
    
    // Set color of hint line to label for each slice
    public function SetLabelHintColor($c)
    {
        $this->labelhintcolor=$c;
    }

    public function SetHeight($aHeight)
    {
        $this->iThickness = $aHeight;
    }


    // Normalize Angle between 0-360
    public function 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 $z
    public function Pie3DSlice($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();
    }

    public 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
    public 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
            $this->value->ApplyFont($img);
            $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->Add3DSliceToCSIM(
                    $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();
    }

    public 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);
            }
        }
    }

    public function Stroke($img, $aaoption=0)
    {
        $n = count($this->data);

        // If user hasn't set the colors use the theme array
        if ($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 width
        if ($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 instead

        if ($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 position
        if ($aaoption != 1) {
            $this->title->SetPos($xc, $yc-$this->title->GetFontHeight($img)-$width/2-$this->title->margin, "center", "bottom");
            $this->title->Stroke($img);
        }
    }

    //---------------
    // PRIVATE METHODS

    // Position the labels of each slice
    public function 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.
        $this->value->ApplyFont($img);
        $h=$img->GetTextHeight($label);
        // For numeric values the format of the display value
        // must be taken into account
        if (is_numeric($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 */