<?php
/*=======================================================================
 // File:        JPGRAPH_WINDROSE.PHP
 // Description: Windrose extension for JpGraph
 // Created:     2003-09-17
 // Ver:         $Id: jpgraph_windrose.php 1928 2010-01-11 19:56:51Z ljp $
 //
 // Copyright (c) Asial Corporation. All rights reserved.
 //========================================================================
 */

require_once('jpgraph_glayout_vh.inc.php');

//------------------------------------------------------------------------
// Determine how many compass directions to show
//------------------------------------------------------------------------
define('WINDROSE_TYPE4', 1);
define('WINDROSE_TYPE8', 2);
define('WINDROSE_TYPE16', 3);
define('WINDROSE_TYPEFREE', 4);

//------------------------------------------------------------------------
// How should the labels for the circular grids be aligned
//------------------------------------------------------------------------
define('LBLALIGN_CENTER', 1);
define('LBLALIGN_TOP', 2);

//------------------------------------------------------------------------
// How should the labels around the plot be align
//------------------------------------------------------------------------
define('LBLPOSITION_CENTER', 1);
define('LBLPOSITION_EDGE', 2);

//------------------------------------------------------------------------
// Interpretation of ordinal values in the data
//------------------------------------------------------------------------
define('KEYENCODING_CLOCKWISE', 1);
define('KEYENCODING_ANTICLOCKWISE', 2);

// Internal debug flag
define('__DEBUG', false);


//===================================================
// CLASS WindrosePlotScale
//===================================================
class WindrosePlotScale
{
    private $iMax;
    private $iDelta=5;
    private $iNumCirc=3;
    public $iMaxNum=0;
    private $iLblFmt='%.0f%%';
    public $iFontFamily=FF_VERDANA;
    public $iFontStyle=FS_NORMAL;
    public $iFontSize=10;
    public $iZFontFamily=FF_ARIAL;
    public $iZFontStyle=FS_NORMAL;
    public $iZFontSize=10;
    public $iFontColor='black';
    public $iZFontColor='black';
    private $iFontFrameColor=false;
    private $iFontBkgColor=false;
    private $iLblZeroTxt=null;
    private $iLblAlign=LBLALIGN_CENTER;
    public $iAngle='auto';
    private $iManualScale = false;
    private $iHideLabels = false;

    public function __construct($aData)
    {
        $max=0;
        $totlegsum = 0;
        $maxnum=0;
        $this->iZeroSum=0;
        foreach ($aData as $idx => $legdata) {
            $legsum = array_sum($legdata);
            $maxnum = max($maxnum, count($legdata)-1);
            $max = max($legsum-$legdata[0], $max);
            $totlegsum += $legsum;
            $this->iZeroSum += $legdata[0] ;
        }
        if (round($totlegsum) > 100) {
            JpGraphError::RaiseL(22001, $legsum);
            //("Total percentage for all windrose legs in a windrose plot can not exceed  100% !\n(Current max is: ".$legsum.')');
        }
        $this->iMax = $max ;
        $this->iMaxNum = $maxnum;
        $this->iNumCirc = $this->GetNumCirc();
        $this->iMaxVal = $this->iNumCirc * $this->iDelta ;
    }

    // Return number of grid circles
    public function GetNumCirc()
    {
        // Never return less than 1 circles
        $num = ceil($this->iMax / $this->iDelta);
        return max(1, $num) ;
    }

    public function SetMaxValue($aMax)
    {
        $this->iMax = $aMax;
        $this->iNumCirc = $this->GetNumCirc();
        $this->iMaxVal = $this->iNumCirc * $this->iDelta ;
    }

    // Set step size for circular grid
    public function Set($aMax, $aDelta=null)
    {
        if ($aDelta==null) {
            $this->SetMaxValue($aMax);
            return;
        }
        $this->iDelta = $aDelta;
        $this->iNumCirc = ceil($aMax/$aDelta); //$this->GetNumCirc();
        $this->iMaxVal = $this->iNumCirc * $this->iDelta ;
        $this->iMax=$aMax;
        // Remember that user has specified interval so don't
        // do autoscaling
        $this->iManualScale = true;
    }

    public function AutoScale($aRadius, $aMinDist=30)
    {
        if ($this->iManualScale) {
            return;
        }

        // Make sure distance (in pixels) between two circles
        // is never less than $aMinDist pixels
        $tst = ceil($aRadius / $this->iNumCirc) ;

        while ($tst <= $aMinDist && $this->iDelta < 100) {
            $this->iDelta += 5;
            $tst = ceil($aRadius / $this->GetNumCirc()) ;
        }

        if ($this->iDelta >= 100) {
            JpGraphError::RaiseL(22002);//('Graph is too small to have a scale. Please make the graph larger.');
        }

        // If the distance is to large try with multiples of 2 instead
        if ($tst > $aMinDist * 3) {
            $this->iDelta = 2;
            $tst = ceil($aRadius / $this->iNumCirc) ;

            while ($tst <= $aMinDist && $this->iDelta < 100) {
                $this->iDelta += 2;
                $tst = ceil($aRadius / $this->GetNumCirc()) ;
            }

            if ($this->iDelta >= 100) {
                JpGraphError::RaiseL(22002); //('Graph is too small to have a scale. Please make the graph larger.');
            }
        }

        $this->iNumCirc = $this->GetNumCirc();
        $this->iMaxVal = $this->iNumCirc * $this->iDelta ;
    }

    // Return max of all leg values
    public function GetMax()
    {
        return $this->iMax;
    }

    public function Hide($aFlg=true)
    {
        $this->iHideLabels = $aFlg;
    }

    public function SetAngle($aAngle)
    {
        $this->iAngle = $aAngle ;
    }

    // Translate a Leg value to radius distance
    public function RelTranslate($aVal, $r, $ri)
    {
        $tv = round($aVal/$this->iMaxVal*($r-$ri));
        return $tv ;
    }

    public function SetLabelAlign($aAlign)
    {
        $this->iLblAlign = $aAlign ;
    }

    public function SetLabelFormat($aFmt)
    {
        $this->iLblFmt = $aFmt ;
    }

    public function SetLabelFillColor($aBkgColor, $aBorderColor=false)
    {
        $this->iFontBkgColor = $aBkgColor;
        if ($aBorderColor === false) {
            $this->iFontFrameColor = $aBkgColor;
        } else {
            $this->iFontFrameColor = $aBorderColor;
        }
    }

    public function SetFontColor($aColor)
    {
        $this->iFontColor = $aColor ;
        $this->iZFontColor = $aColor ;
    }

    public function SetFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iFontFamily = $aFontFamily ;
        $this->iFontStyle = $aFontStyle ;
        $this->iFontSize = $aFontSize ;
        $this->SetZFont($aFontFamily, $aFontStyle, $aFontSize);
    }

    public function SetZFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iZFontFamily = $aFontFamily ;
        $this->iZFontStyle = $aFontStyle ;
        $this->iZFontSize = $aFontSize ;
    }

    public function SetZeroLabel($aTxt)
    {
        $this->iLblZeroTxt = $aTxt ;
    }

    public function SetZFontColor($aColor)
    {
        $this->iZFontColor = $aColor ;
    }

    public function StrokeLabels($aImg, $xc, $yc, $ri, $rr)
    {
        if ($this->iHideLabels) {
            return;
        }

        // Setup some convinient vairables
        $a = $this->iAngle * M_PI/180.0;
        $n = $this->iNumCirc;
        $d = $this->iDelta;

        // Setup the font and font color
        $val = new Text();
        $val->SetFont($this->iFontFamily, $this->iFontStyle, $this->iFontSize);
        $val->SetColor($this->iFontColor);

        if ($this->iFontBkgColor !== false) {
            $val->SetBox($this->iFontBkgColor, $this->iFontFrameColor);
        }

        // Position the labels relative to the radiant circles
        if ($this->iLblAlign == LBLALIGN_TOP) {
            if ($a > 0 && $a <= M_PI/2) {
                $val->SetAlign('left', 'bottom');
            } elseif ($a > M_PI/2 && $a <= M_PI) {
                $val->SetAlign('right', 'bottom');
            }
        } elseif ($this->iLblAlign == LBLALIGN_CENTER) {
            $val->SetAlign('center', 'center');
        }

        // Stroke the labels close to each circle
        $v = $d ;
        $si = sin($a);
        $co = cos($a);
        for ($i=0; $i < $n; ++$i, $v += $d) {
            $r = $ri + ($i+1) * $rr;
            $x = $xc + $co * $r;
            $y = $yc - $si * $r;
            $val->Set(sprintf($this->iLblFmt, $v));
            $val->Stroke($aImg, $x, $y);
        }

        // Print the text in the zero circle
        if ($this->iLblZeroTxt === null) {
            $this->iLblZeroTxt = sprintf($this->iLblFmt, $this->iZeroSum);
        } else {
            $this->iLblZeroTxt = sprintf($this->iLblZeroTxt, $this->iZeroSum);
        }

        $val->Set($this->iLblZeroTxt);
        $val->SetAlign('center', 'center');
        $val->SetParagraphAlign('center');
        $val->SetColor($this->iZFontColor);
        $val->SetFont($this->iZFontFamily, $this->iZFontStyle, $this->iZFontSize);
        $val->Stroke($aImg, $xc, $yc);
    }
}

//===================================================
// CLASS LegendStyle
//===================================================
class LegendStyle
{
    public $iLength = 40;
    public $iMargin = 20 ;
    public $iBottomMargin=5;
    public $iCircleWeight=2;
    public $iCircleRadius = 18;
    public $iCircleColor='black';
    public $iTxtFontFamily=FF_VERDANA;
    public $iTxtFontStyle=FS_NORMAL;
    public $iTxtFontSize=8;
    public $iLblFontFamily=FF_VERDANA;
    public $iLblFontStyle=FS_NORMAL;
    public $iLblFontSize=8;
    public $iCircleFontFamily=FF_VERDANA;
    public $iCircleFontStyle=FS_NORMAL;
    public $iCircleFontSize=8;
    public $iLblFontColor='black';
    public $iTxtFontColor='black';
    public $iCircleFontColor='black';
    public $iShow=true;
    public $iFormatString='%.1f';
    public $iTxtMargin=6;
    public $iTxt='';
    public $iZCircleTxt='Calm';

    public function SetFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iLblFontFamily = $aFontFamily ;
        $this->iLblFontStyle = $aFontStyle ;
        $this->iLblFontSize = $aFontSize ;
        $this->iTxtFontFamily = $aFontFamily ;
        $this->iTxtFontStyle = $aFontStyle ;
        $this->iTxtFontSize = $aFontSize ;
        $this->iCircleFontFamily = $aFontFamily ;
        $this->iCircleFontStyle = $aFontStyle ;
        $this->iCircleFontSize = $aFontSize ;
    }

    public function SetLFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iLblFontFamily = $aFontFamily ;
        $this->iLblFontStyle = $aFontStyle ;
        $this->iLblFontSize = $aFontSize ;
    }

    public function SetTFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iTxtFontFamily = $aFontFamily ;
        $this->iTxtFontStyle = $aFontStyle ;
        $this->iTxtFontSize = $aFontSize ;
    }

    public function SetCFont($aFontFamily, $aFontStyle=FS_NORMAL, $aFontSize=10)
    {
        $this->iCircleFontFamily = $aFontFamily ;
        $this->iCircleFontStyle = $aFontStyle ;
        $this->iCircleFontSize = $aFontSize ;
    }


    public function SetFontColor($aColor)
    {
        $this->iTxtFontColor = $aColor ;
        $this->iLblFontColor = $aColor ;
        $this->iCircleFontColor = $aColor ;
    }

    public function SetTFontColor($aColor)
    {
        $this->iTxtFontColor = $aColor ;
    }

    public function SetLFontColor($aColor)
    {
        $this->iLblFontColor = $aColor ;
    }

    public function SetCFontColor($aColor)
    {
        $this->iCircleFontColor = $aColor ;
    }

    public function SetCircleWeight($aWeight)
    {
        $this->iCircleWeight = $aWeight;
    }

    public function SetCircleRadius($aRadius)
    {
        $this->iCircleRadius = $aRadius;
    }

    public function SetCircleColor($aColor)
    {
        $this->iCircleColor = $aColor ;
    }

    public function SetCircleText($aTxt)
    {
        $this->iZCircleTxt = $aTxt;
    }

    public function SetMargin($aMarg, $aBottomMargin=5)
    {
        $this->iMargin=$aMarg;
        $this->iBottomMargin=$aBottomMargin;
    }

    public function SetLength($aLength)
    {
        $this->iLength = $aLength ;
    }

    public function Show($aFlg=true)
    {
        $this->iShow = $aFlg;
    }

    public function Hide($aFlg=true)
    {
        $this->iShow = ! $aFlg;
    }

    public function SetFormat($aFmt)
    {
        $this->iFormatString=$aFmt;
    }

    public function SetText($aTxt)
    {
        $this->iTxt = $aTxt ;
    }
}

define('RANGE_OVERLAPPING', 0);
define('RANGE_DISCRETE', 1);

//===================================================
// CLASS WindrosePlot
//===================================================
class WindrosePlot
{
    private $iAntiAlias=true;
    private $iData=array();
    public $iX=0.5;
    public $iY=0.5;
    public $iSize=0.55;
    private $iGridColor1='gray';
    private $iGridColor2='darkgreen';
    private $iRadialColorArray=array();
    private $iRadialWeightArray=array();
    private $iRadialStyleArray=array();
    private $iRanges = array(1,2,3,5,6,10,13.5,99.0);
    private $iRangeStyle = RANGE_OVERLAPPING ;
    public $iCenterSize=60;
    private $iType = WINDROSE_TYPE16;
    public $iFontFamily=FF_VERDANA;
    public $iFontStyle=FS_NORMAL;
    public $iFontSize=10;
    public $iFontColor='darkgray';
    private $iRadialGridStyle='longdashed';
    private $iAllDirectionLabels =  array('E','ENE','NE','NNE','N','NNW','NW','WNW','W','WSW','SW','SSW','S','SSE','SE','ESE');
    private $iStandardDirections = array();
    private $iCircGridWeight=3;
    private $iRadialGridWeight=1;
    private $iLabelMargin=12;
    private $iLegweights = array(2,4,6,8,10,12,14,16,18,20);
    private $iLegColors = array('orange','black','blue','red','green','purple','navy','yellow','brown');
    private $iLabelFormatString='';
    private $iLabels=array();
    private $iLabelPositioning = LBLPOSITION_EDGE;
    private $iColor='white';
    private $iShowBox=false;
    private $iBoxColor='black';
    private $iBoxWeight=1;
    private $iBoxStyle='solid';
    private $iOrdinalEncoding=KEYENCODING_ANTICLOCKWISE;
    public $legend=null;

    public function __construct($aData)
    {
        $this->iData = $aData;
        $this->legend = new LegendStyle();

        // Setup the scale
        $this->scale = new WindrosePlotScale($this->iData);

        // default label for free type i agle and a degree sign
        $this->iLabelFormatString = '%.1f'.SymChar::Get('degree');

        $delta = 2*M_PI/16;
        for ($i=0, $a=0; $i < 16; ++$i, $a += $delta) {
            $this->iStandardDirections[$this->iAllDirectionLabels[$i]] = $a;
        }
    }

    // Dummy method to make window plots have the same signature as the
    // layout classes since windrose plots are "leaf" classes in the hierarchy
    public function LayoutSize()
    {
        return 1;
    }

    public function SetSize($aSize)
    {
        $this->iSize = $aSize;
    }

    public function SetDataKeyEncoding($aEncoding)
    {
        $this->iOrdinalEncoding = $aEncoding;
    }

    public function SetColor($aColor)
    {
        $this->iColor = $aColor;
    }

    public function SetRadialColors($aColors)
    {
        $this->iRadialColorArray = $aColors;
    }

    public function SetRadialWeights($aWeights)
    {
        $this->iRadialWeightArray = $aWeights;
    }

    public function SetRadialStyles($aStyles)
    {
        $this->iRadialStyleArray = $aStyles;
    }

    public function SetBox($aColor='black', $aWeight=1, $aStyle='solid', $aShow=true)
    {
        $this->iShowBox = $aShow ;
        $this->iBoxColor = $aColor ;
        $this->iBoxWeight = $aWeight ;
        $this->iBoxStyle = $aStyle;
    }

    public function SetLabels($aLabels)
    {
        $this->iLabels = $aLabels ;
    }

    public function SetLabelMargin($aMarg)
    {
        $this->iLabelMargin = $aMarg ;
    }

    public function SetLabelFormat($aLblFormat)
    {
        $this->iLabelFormatString = $aLblFormat ;
    }

    public function SetCompassLabels($aLabels)
    {
        if (count($aLabels) != 16) {
            JpgraphError::RaiseL(22004); //('Label specification for windrose directions must have 16 values (one for each compass direction).');
        }
        $this->iAllDirectionLabels = $aLabels ;

        $delta = 2*M_PI/16;
        for ($i=0, $a=0; $i < 16; ++$i, $a += $delta) {
            $this->iStandardDirections[$this->iAllDirectionLabels[$i]] = $a;
        }
    }

    public function SetCenterSize($aSize)
    {
        $this->iCenterSize = $aSize;
    }
    // Alias for SetCenterSize
    public function SetZCircleSize($aSize)
    {
        $this->iCenterSize = $aSize;
    }

    public function SetFont($aFFam, $aFStyle=FS_NORMAL, $aFSize=10)
    {
        $this->iFontFamily = $aFFam ;
        $this->iFontStyle = $aFStyle ;
        $this->iFontSize = $aFSize ;
    }

    public function SetFontColor($aColor)
    {
        $this->iFontColor=$aColor;
    }

    public function SetGridColor($aColor1, $aColor2)
    {
        $this->iGridColor1 = $aColor1;
        $this->iGridColor2 = $aColor2;
    }

    public function SetGridWeight($aGrid1=1, $aGrid2=2)
    {
        $this->iCircGridWeight = $aGrid1 ;
        $this->iRadialGridWeight = $aGrid2 ;
    }

    public function SetRadialGridStyle($aStyle)
    {
        $aStyle = strtolower($aStyle);
        if (!in_array($aStyle, array('solid','dotted','dashed','longdashed'))) {
            JpGraphError::RaiseL(22005); //("Line style for radial lines must be on of ('solid','dotted','dashed','longdashed') ");
        }
        $this->iRadialGridStyle=$aStyle;
    }

    public function SetRanges($aRanges)
    {
        $this->iRanges = $aRanges;
    }

    public function SetRangeStyle($aStyle)
    {
        $this->iRangeStyle = $aStyle;
    }

    public function SetRangeColors($aLegColors)
    {
        $this->iLegColors = $aLegColors;
    }

    public function SetRangeWeights($aWeights)
    {
        $n=count($aWeights);
        for ($i=0; $i< $n; ++$i) {
            $aWeights[$i] = floor($aWeights[$i]/2);
        }
        $this->iLegweights = $aWeights;
    }

    public function SetType($aType)
    {
        if ($aType < WINDROSE_TYPE4 || $aType > WINDROSE_TYPEFREE) {
            JpGraphError::RaiseL(22006); //('Illegal windrose type specified.');
        }
        $this->iType = $aType;
    }

    // Alias for SetPos()
    public function SetCenterPos($aX, $aY)
    {
        $this->iX = $aX;
        $this->iY = $aY;
    }
    
    public function SetPos($aX, $aY)
    {
        $this->iX = $aX;
        $this->iY = $aY;
    }

    public function SetAntiAlias($aFlag)
    {
        $this->iAntiAlias = $aFlag ;
        if (! $aFlag) {
            $this->iCircGridWeight = 1;
        }
    }

    public function _ThickCircle($aImg, $aXC, $aYC, $aRad, $aWeight=2, $aColor)
    {
        $aImg->SetColor($aColor);
        $aRad *= 2 ;
        $aImg->Ellipse($aXC, $aYC, $aRad, $aRad);
        if ($aWeight > 1) {
            $aImg->Ellipse($aXC, $aYC, $aRad+1, $aRad+1);
            $aImg->Ellipse($aXC, $aYC, $aRad+2, $aRad+2);
            if ($aWeight > 2) {
                $aImg->Ellipse($aXC, $aYC, $aRad+3, $aRad+3);
                $aImg->Ellipse($aXC, $aYC, $aRad+3, $aRad+4);
                $aImg->Ellipse($aXC, $aYC, $aRad+4, $aRad+3);
            }
        }
    }

    public function _StrokeWindLeg($aImg, $xc, $yc, $a, $ri, $r, $weight, $color)
    {

        // If less than 1 px long then we assume this has been caused by rounding problems
        // and should not be stroked
        if ($r < 1) {
            return;
        }

        $xt = $xc + cos($a)*$ri;
        $yt = $yc - sin($a)*$ri;
        $xxt = $xc + cos($a)*($ri+$r);
        $yyt = $yc - sin($a)*($ri+$r);

        $x1 = $xt - $weight*sin($a);
        $y1 = $yt - $weight*cos($a);
        $x2 = $xxt - $weight*sin($a);
        $y2 = $yyt - $weight*cos($a);

        $x3 = $xxt + $weight*sin($a);
        $y3 = $yyt + $weight*cos($a);
        $x4 = $xt + $weight*sin($a);
        $y4 = $yt + $weight*cos($a);

        $pts = array($x1,$y1,$x2,$y2,$x3,$y3,$x4,$y4);
        $aImg->SetColor($color);
        $aImg->FilledPolygon($pts);
    }

    public function _StrokeLegend($aImg, $x, $y, $scaling=1, $aReturnWidth=false)
    {
        if (! $this->legend->iShow) {
            return 0;
        }

        $nlc = count($this->iLegColors);
        $nlw = count($this->iLegweights);

        // Setup font for ranges
        $value = new Text();
        $value->SetAlign('center', 'bottom');
        $value->SetFont(
            $this->legend->iLblFontFamily,
            $this->legend->iLblFontStyle,
            $this->legend->iLblFontSize*$scaling
        );
        $value->SetColor($this->legend->iLblFontColor);

        // Remember x-center
        $xcenter = $x ;

        // Construct format string
        $fmt = $this->legend->iFormatString.'-'.$this->legend->iFormatString;

        // Make sure that the length of each range is enough to cover the
        // size of the labels
        $tst = sprintf($fmt, $this->iRanges[0], $this->iRanges[1]);
        $value->Set($tst);
        $w = $value->GetWidth($aImg);
        $l = round(max($this->legend->iLength * $scaling, $w*1.5));

        $r = $this->legend->iCircleRadius * $scaling ;
        $len = 2*$r + $this->scale->iMaxNum * $l;

        // We are called just to find out the width
        if ($aReturnWidth) {
            return $len;
        }

        $x -= round($len/2);
        $x += $r;

        // 4 pixels extra vertical margin since the circle sometimes is +/- 1 pixel of the
        // theorethical radius due to imperfection in the GD library
        //$y -= round(max($r,$scaling*$this->iLegweights[($this->scale->iMaxNum-1) % $nlw])+4*$scaling);
        $y -= ($this->legend->iCircleRadius + 2)*$scaling+$this->legend->iBottomMargin*$scaling;

        // Adjust for bottom text
        if ($this->legend->iTxt != '') {
            // Setup font for text
            $value->Set($this->legend->iTxt);
            $y -= /*$this->legend->iTxtMargin + */ $value->GetHeight($aImg);
        }

        // Stroke 0-circle
        $this->_ThickCircle(
            $aImg,
            $x,
            $y,
            $r,
            $this->legend->iCircleWeight,
            $this->legend->iCircleColor
        );

        // Remember the center of the circe
        $xc=$x;
        $yc=$y;

        $value->SetAlign('center', 'bottom');
        $x += $r+1;

        // Stroke all used ranges
        $txty = $y -
        round($this->iLegweights[($this->scale->iMaxNum-1)%$nlw]*$scaling) - 4*$scaling;
        if ($this->scale->iMaxNum >= count($this->iRanges)) {
            JpGraphError::RaiseL(22007); //('To few values for the range legend.');
        }
        $i=0;
        $idx=0;
        while ($i < $this->scale->iMaxNum) {
            $y1 = $y - round($this->iLegweights[$i % $nlw]*$scaling);
            $y2 = $y + round($this->iLegweights[$i % $nlw]*$scaling);
            $x2 = $x + $l ;
            $aImg->SetColor($this->iLegColors[$i % $nlc]);
            $aImg->FilledRectangle($x, $y1, $x2, $y2);
            if ($this->iRangeStyle == RANGE_OVERLAPPING) {
                $lbl = sprintf($fmt, $this->iRanges[$idx], $this->iRanges[$idx+1]);
            } else {
                $lbl = sprintf($fmt, $this->iRanges[$idx], $this->iRanges[$idx+1]);
                ++$idx;
            }
            $value->Set($lbl);
            $value->Stroke($aImg, $x+$l/2, $txty);
            $x = $x2;
            ++$i;
            ++$idx;
        }

        // Setup circle font
        $value->SetFont(
            $this->legend->iCircleFontFamily,
            $this->legend->iCircleFontStyle,
            $this->legend->iCircleFontSize*$scaling
        );
        $value->SetColor($this->legend->iCircleFontColor);

        // Stroke 0-circle text
        $value->Set($this->legend->iZCircleTxt);
        $value->SetAlign('center', 'center');
        $value->ParagraphAlign('center');
        $value->Stroke($aImg, $xc, $yc);

        // Setup circle font
        $value->SetFont(
            $this->legend->iTxtFontFamily,
            $this->legend->iTxtFontStyle,
            $this->legend->iTxtFontSize*$scaling
        );
        $value->SetColor($this->legend->iTxtFontColor);

        // Draw the text under the legend
        $value->Set($this->legend->iTxt);
        $value->SetAlign('center', 'top');
        $value->SetParagraphAlign('center');
        $value->Stroke($aImg, $xcenter, $y2+$this->legend->iTxtMargin*$scaling);
    }

    public function SetAutoScaleAngle($aIsRegRose=true)
    {

        // If the user already has manually set an angle don't
        // trye to find a position
        if (is_numeric($this->scale->iAngle)) {
            return;
        }

        if ($aIsRegRose) {

            // Create a complete data for all directions
            // and translate string directions to ordinal values.
            // This will much simplify the logic below
            for ($i=0; $i < 16; ++$i) {
                $dtxt = $this->iAllDirectionLabels[$i];
                if (!empty($this->iData[$dtxt])) {
                    $data[$i] = $this->iData[$dtxt];
                } elseif (!empty($this->iData[strtolower($dtxt)])) {
                    $data[$i] = $this->iData[strtolower($dtxt)];
                } elseif (!empty($this->iData[$i])) {
                    $data[$i] = $this->iData[$i];
                } else {
                    $data[$i] = array();
                }
            }

            // Find the leg which has the lowest weighted sum of number of data around it
            $c0 = array_sum($data[0]);
            $c1 = array_sum($data[1]);
            $found = 1;
            $min = $c0+$c1*100; // Initialize to a high value
            for ($i=1; $i < 15; ++$i) {
                $c2 = array_sum($data[$i+1]);

                // Weight the leg we will use more to give preference
                // to a short middle leg even if the 3 way sum is similair
                $w = $c0 + 3*$c1 + $c2 ;
                if ($w < $min) {
                    $min = $w;
                    $found = $i;
                }
                $c0 = $c1;
                $c1 = $c2;
            }
            $this->scale->iAngle = $found*22.5;
        } else {
            $n = count($this->iData);
            foreach ($this->iData as $dir => $leg) {
                if (!is_numeric($dir)) {
                    $pos = array_search(strtoupper($dir), $this->iAllDirectionLabels);
                    if ($pos !== false) {
                        $dir = $pos*22.5;
                    }
                }
                $data[round($dir)] = $leg;
            }

            // Get all the angles for the data and sort it
            $keys = array_keys($data);
            sort($keys, SORT_NUMERIC);

            $n = count($data);
            $found = false;
            $max = 0 ;
            for ($i=0; $i < 15; ++$i) {
                $try_a = round(22.5*$i);

                if ($try_a > $keys[$n-1]) {
                    break;
                }

                if (in_array($try_a, $keys)) {
                    continue;
                }

                // Find the angle just lower than this
                $j=0;
                while ($j < $n && $keys[$j] <= $try_a) {
                    ++$j;
                }
                if ($j == 0) {
                    $kj = 0;
                    $keys[$n-1];
                    $d1 = 0;
                    abs($kj-$try_a);
                } else {
                    --$j;
                    $kj = $keys[$j];
                    $d1 = abs($kj-$try_a);
                }

                // Find the angle just larger than this
                $l=$n-1;
                while ($l >= 0 && $keys[$l] >= $try_a) {
                    --$l;
                }
                if ($l == $n-1) {
                    $kl = $keys[0];
                    $d2 = abs($kl-$try_a);
                } else {
                    ++$l;
                    $kl = $keys[$l];
                    $d2 = abs($kl-$try_a);
                }

                // Weight the distance so that legs with large spread
                // gets a better weight
                $w = $d1 + $d2;
                if ($i == 0) {
                    $w = round(1.4 * $w);
                }
                $diff = abs($d1 - $d2);
                $w *= (360-$diff);
                if ($w > $max) {
                    $found = $i;
                    $max = $w;
                }
            }

            $a = $found*22.5;

            // Some heuristics to have some preferred positions
            if ($keys[$n-1] < 25) {
                $a = 45;
            } elseif ($keys[0] > 60) {
                $a = 45;
            } elseif ($keys[0] > 25 && $keys[$n-1] < 340) {
                $a = 0;
            } elseif ($keys[$n-1] < 75) {
                $a = 90;
            } elseif ($keys[$n-1] < 120) {
                $a = 135;
            } elseif ($keys[$n-1] < 160) {
                $a = 180;
            }

            $this->scale->iAngle = $a ;
        }
    }

    public function NormAngle($a)
    {
        while ($a > 360) {
            $a -= 360;
        }
        return $a;
    }

    public function SetLabelPosition($aPos)
    {
        $this->iLabelPositioning  = $aPos ;
    }

    public function _StrokeFreeRose($dblImg, $value, $scaling, $xc, $yc, $r, $ri)
    {

        // Plot radial grid lines and remember the end position
        // and the angle for later use when plotting the labels
        if ($this->iType != WINDROSE_TYPEFREE) {
            JpGraphError::RaiseL(22008); //('Internal error: Trying to plot free Windrose even though type is not a free windorose');
        }

        // Check if we should auto-position the angle for the
        // labels. Basically we try to find a firection with smallest
        // (or none) data.
        $this->SetAutoScaleAngle(false);

        $nlc = count($this->iLegColors);
        $nlw = count($this->iLegweights);

        // Stroke grid lines for directions and remember the
        // position for the labels
        $txtpos=array();
        $num = count($this->iData);

        $keys = array_keys($this->iData);

        foreach ($this->iData as $dir => $legdata) {
            if (in_array($dir, $this->iAllDirectionLabels, true) === true) {
                $a = $this->iStandardDirections[strtoupper($dir)];
                if (in_array($a*180/M_PI, $keys)) {
                    JpGraphError::RaiseL(22009, round($a*180/M_PI));
                    //('You have specified the same direction twice, once with an angle and once with a compass direction ('.$a*180/M_PI.' degrees.)');
                }
            } elseif (is_numeric($dir)) {
                $this->NormAngle($dir);

                if ($this->iOrdinalEncoding == KEYENCODING_CLOCKWISE) {
                    $dir = 360-$dir;
                }

                $a = $dir * M_PI/180;
            } else {
                JpGraphError::RaiseL(22010);//('Direction must either be a numeric value or one of the 16 compass directions');
            }

            $xxc = round($xc + cos($a)*$ri);
            $yyc = round($yc - sin($a)*$ri);
            $x = round($xc + cos($a)*$r);
            $y = round($yc - sin($a)*$r);
            if (empty($this->iRadialColorArray[$dir])) {
                $dblImg->SetColor($this->iGridColor2);
            } else {
                $dblImg->SetColor($this->iRadialColorArray[$dir]);
            }
            if (empty($this->iRadialWeightArray[$dir])) {
                $dblImg->SetLineWeight($this->iRadialGridWeight);
            } else {
                $dblImg->SetLineWeight($this->iRadialWeightArray[$dir]);
            }
            if (empty($this->iRadialStyleArray[$dir])) {
                $dblImg->SetLineStyle($this->iRadialGridStyle);
            } else {
                $dblImg->SetLineStyle($this->iRadialStyleArray[$dir]);
            }
            $dblImg->StyleLine($xxc, $yyc, $x, $y);
            $txtpos[] = array($x,$y,$a);
        }
        $dblImg->SetLineWeight(1);

        // Setup labels
        $lr = $scaling * $this->iLabelMargin;

        if ($this->iLabelPositioning == LBLPOSITION_EDGE) {
            $value->SetAlign('left', 'top');
        } else {
            $value->SetAlign('center', 'center');
            $value->SetMargin(0);
        }

        for ($i=0; $i < $num; ++$i) {
            list($x, $y, $a) = $txtpos[$i];

            // Determine the label

            $da = $a*180/M_PI;
            if ($this->iOrdinalEncoding == KEYENCODING_CLOCKWISE) {
                $da = 360 - $da;
            }

            //$da = 360-$da;
            
            if (!empty($this->iLabels[$keys[$i]])) {
                $lbl = $this->iLabels[$keys[$i]];
            } else {
                $lbl = sprintf($this->iLabelFormatString, $da);
            }

            if ($this->iLabelPositioning == LBLPOSITION_CENTER) {
                $dx = $dy = 0;
            } else {
                // LBLPOSIITON_EDGE
                if ($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) {
                    $dy=(0.5+$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;
                }
            }

            $value->Set($lbl);
            $th = $value->GetHeight($dblImg);
            $tw = $value->GetWidth($dblImg);
            $xt=round($lr*cos($a)+$x) - $dx*$tw;
            $yt=round($y-$lr*sin($a)) - $dy*$th;

            $value->Stroke($dblImg, $xt, $yt);
        }

        if (__DEBUG) {
            $dblImg->SetColor('red');
            $dblImg->Circle($xc, $yc, $lr+$r);
        }

        // Stroke all the legs
        reset($this->iData);
        $i=0;
        foreach ($this->iData as $dir => $legdata) {
            $legdata = array_slice($legdata, 1);
            $nn = count($legdata);

            $a = $txtpos[$i][2];
            $rri = $ri/$scaling;
            for ($j=0; $j < $nn; ++$j) {
                // We want the non scaled original radius
                $legr = $this->scale->RelTranslate($legdata[$j], $r/$scaling, $ri/$scaling) ;
                $this->_StrokeWindLeg(
                    $dblImg,
                    $xc,
                    $yc,
                    $a,
                    $rri *$scaling,
                    $legr *$scaling,
                    $this->iLegweights[$j % $nlw] * $scaling,
                    $this->iLegColors[$j % $nlc]
                );
                $rri += $legr;
            }
            ++$i;
        }
    }

    // Translate potential string specified compass labels to their
    // corresponding index.
    public function FixupIndexes($aDataArray, $num)
    {
        $ret = array();
        $keys = array_keys($aDataArray);
        foreach ($aDataArray as $idx => $data) {
            if (is_string($idx)) {
                $idx = strtoupper($idx);
                $res = array_search($idx, $this->iAllDirectionLabels);
                if ($res === false) {
                    JpGraphError::RaiseL(22011, $idx); //('Windrose index must be numeric or direction label. You have specified index='.$idx);
                }
                $idx = $res;
                if ($idx % (16 / $num) !== 0) {
                    JpGraphError::RaiseL(22012); //('Windrose radial axis specification contains a direction which is not enabled.');
                }
                $idx /= (16/$num) ;

                if (in_array($idx, $keys, 1)) {
                    JpgraphError::RaiseL(22013, $idx); //('You have specified the look&feel for the same compass direction twice, once with text and once with index (Index='.$idx.')');
                }
            }
            if ($idx < 0 || $idx > 15) {
                JpgraphError::RaiseL(22014); //('Index for copmass direction must be between 0 and 15.');
            }
            $ret[$idx] = $data;
        }
        return $ret;
    }

    public function _StrokeRegularRose($dblImg, $value, $scaling, $xc, $yc, $r, $ri)
    {
        // _StrokeRegularRose($dblImg,$xc,$yc,$r,$ri)
        // Plot radial grid lines and remember the end position
        // and the angle for later use when plotting the labels
        switch ($this->iType) {
            case WINDROSE_TYPE4:
                $num = 4; break;
            case WINDROSE_TYPE8:
                $num = 8; break;
            case WINDROSE_TYPE16:
                $num = 16; break;
            default:
                JpGraphError::RaiseL(22015);//('You have specified an undefined Windrose plot type.');
        }

        // Check if we should auto-position the angle for the
        // labels. Basically we try to find a firection with smallest
        // (or none) data.
        $this->SetAutoScaleAngle(true);

        $nlc = count($this->iLegColors);
        $nlw = count($this->iLegweights);

        $this->iRadialColorArray = $this->FixupIndexes($this->iRadialColorArray, $num);
        $this->iRadialWeightArray = $this->FixupIndexes($this->iRadialWeightArray, $num);
        $this->iRadialStyleArray = $this->FixupIndexes($this->iRadialStyleArray, $num);

        $txtpos=array();
        $a = 2*M_PI/$num;
        $dblImg->SetColor($this->iGridColor2);
        $dblImg->SetLineStyle($this->iRadialGridStyle);
        $dblImg->SetLineWeight($this->iRadialGridWeight);

        // Translate any name specified directions to the index
        // so we can easily use it in the loop below
        for ($i=0; $i < $num; ++$i) {
            $xxc = round($xc + cos($a*$i)*$ri);
            $yyc = round($yc - sin($a*$i)*$ri);
            $x = round($xc + cos($a*$i)*$r);
            $y = round($yc - sin($a*$i)*$r);
            if (empty($this->iRadialColorArray[$i])) {
                $dblImg->SetColor($this->iGridColor2);
            } else {
                $dblImg->SetColor($this->iRadialColorArray[$i]);
            }
            if (empty($this->iRadialWeightArray[$i])) {
                $dblImg->SetLineWeight($this->iRadialGridWeight);
            } else {
                $dblImg->SetLineWeight($this->iRadialWeightArray[$i]);
            }
            if (empty($this->iRadialStyleArray[$i])) {
                $dblImg->SetLineStyle($this->iRadialGridStyle);
            } else {
                $dblImg->SetLineStyle($this->iRadialStyleArray[$i]);
            }

            $dblImg->StyleLine($xxc, $yyc, $x, $y);
            $txtpos[] = array($x,$y,$a*$i);
        }
        $dblImg->SetLineWeight(1);

        $lr = $scaling * $this->iLabelMargin;
        if ($this->iLabelPositioning == LBLPOSITION_CENTER) {
            $value->SetAlign('center', 'center');
        } else {
            $value->SetAlign('left', 'top');
            $value->SetMargin(0);
            $lr /= 2 ;
        }

        for ($i=0; $i < $num; ++$i) {
            list($x, $y, $a) = $txtpos[$i];

            // Set the position of the label
            if ($this->iLabelPositioning == LBLPOSITION_CENTER) {
                $dx = $dy = 0;
            } else {
                // LBLPOSIITON_EDGE
                if ($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) {
                    $dy=(0.5+$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;
                }
            }

            $value->Set($this->iAllDirectionLabels[$i*(16/$num)]);
            $th = $value->GetHeight($dblImg);
            $tw = $value->GetWidth($dblImg);
            $xt=round($lr*cos($a)+$x) - $dx*$tw;
            $yt=round($y-$lr*sin($a)) - $dy*$th;

            $value->Stroke($dblImg, $xt, $yt);
        }

        if (__DEBUG) {
            $dblImg->SetColor("red");
            $dblImg->Circle($xc, $yc, $lr+$r);
        }

        // Stroke all the legs
        reset($this->iData);
        $keys = array_keys($this->iData);
        foreach ($this->iData as $idx => $legdata) {
            $legdata = array_slice($legdata, 1);
            $nn = count($legdata);
            if (is_string($idx)) {
                $idx = strtoupper($idx);
                $idx = array_search($idx, $this->iAllDirectionLabels);
                if ($idx === false) {
                    JpGraphError::RaiseL(22016);//('Windrose leg index must be numeric or direction label.');
                }
                if ($idx % (16 / $num) !== 0) {
                    JpGraphError::RaiseL(22017);//('Windrose data contains a direction which is not enabled. Please adjust what labels are displayed.');
                }
                $idx /= (16/$num) ;

                if (in_array($idx, $keys, 1)) {
                    JpgraphError::RaiseL(22018, $idx);//('You have specified data for the same compass direction twice, once with text and once with index (Index='.$idx.')');
                }
            }
            if ($idx < 0 || $idx > 15) {
                JpgraphError::RaiseL(22019);//('Index for direction must be between 0 and 15. You can\'t specify angles for a Regular Windplot, only index and compass directions.');
            }
            $a = $idx * (360 / $num) ;
            $a *= M_PI/180.0;
            $rri = $ri/$scaling;
            for ($j=0; $j < $nn; ++$j) {
                // We want the non scaled original radius
                $legr = $this->scale->RelTranslate($legdata[$j], $r/$scaling, $ri/$scaling) ;
                $this->_StrokeWindLeg(
                    $dblImg,
                    $xc,
                    $yc,
                    $a,
                    $rri *$scaling,
                    $legr *$scaling,
                    $this->iLegweights[$j % $nlw] * $scaling,
                    $this->iLegColors[$j % $nlc]
                );
                $rri += $legr;
            }
        }
    }


    public function getWidth($aImg)
    {
        $scaling = 1;//$this->iAntiAlias ? 2 : 1 ;
        if ($this->iSize > 0 && $this->iSize < 1) {
            $this->iSize *= min($aImg->width, $aImg->height);
        }


        $value = new Text();
        $value->SetFont($this->iFontFamily, $this->iFontStyle, $this->iFontSize*$scaling);
        $value->SetColor($this->iFontColor);
        // Setup extra size around the graph needed so that the labels
        // doesn't get cut. For this we need to find the largest label.
        // The code below gives a possible a little to large margin. The
        // really, really proper way would be to account for what angle
        // the label are at
        $n = count($this->iLabels);
        if ($n > 0) {
            $maxh=0;
            $maxw=0;
            foreach ($this->iLabels as $key => $lbl) {
                $value->Set($lbl);
                $maxw = max($maxw, $value->GetWidth($aImg));
            }
        } else {
            $value->Set('888.888'); // Dummy value to get width/height
            $maxw = $value->GetWidth($aImg);
        }
        // Add an extra margin of 50% the font size
        $maxw += round($this->iFontSize*$scaling * 0.4) ;

        $valxmarg = 1.5*$maxw+2*$this->iLabelMargin*$scaling;
        $w = round($this->iSize*$scaling + $valxmarg);

        // Make sure that the width of the legend fits
        $legendwidth = $this->_StrokeLegend($aImg, 0, 0, $scaling, true)+10*$scaling;
        $w = max($w, $legendwidth);

        return $w;
    }

    public function getHeight($aImg)
    {
        $scaling = 1;//$this->iAntiAlias ? 2 : 1 ;
        if ($this->iSize > 0 && $this->iSize < 1) {
            $this->iSize *= min($aImg->width, $aImg->height);
        }

        $value = new Text();
        $value->SetFont($this->iFontFamily, $this->iFontStyle, $this->iFontSize*$scaling);
        $value->SetColor($this->iFontColor);
        // Setup extra size around the graph needed so that the labels
        // doesn't get cut. For this we need to find the largest label.
        // The code below gives a possible a little to large margin. The
        // really, really proper way would be to account for what angle
        // the label are at
        $n = count($this->iLabels);
        if ($n > 0) {
            $maxh=0;
            $maxw=0;
            foreach ($this->iLabels as $key => $lbl) {
                $value->Set($lbl);
                $maxh = max($maxh, $value->GetHeight($aImg));
            }
        } else {
            $value->Set('180.8'); // Dummy value to get width/height
            $maxh = $value->GetHeight($aImg);
        }
        // Add an extra margin of 50% the font size
        //$maxh += round($this->iFontSize*$scaling * 0.5) ;
        $valymarg = 2*$maxh+2*$this->iLabelMargin*$scaling;

        $legendheight = round($this->legend->iShow ? 1 : 0);
        $legendheight *= max($this->legend->iCircleRadius*2, $this->legend->iTxtFontSize*2)+
                         $this->legend->iMargin + $this->legend->iBottomMargin + 2;
        $legendheight *= $scaling;
        $h = round($this->iSize*$scaling + $valymarg) + $legendheight ;

        return $h;
    }

    public function Stroke($aGraph)
    {
        $aImg = $aGraph->img;

        if ($this->iX > 0 && $this->iX < 1) {
            $this->iX = round($aImg->width * $this->iX) ;
        }

        if ($this->iY > 0 && $this->iY < 1) {
            $this->iY = round($aImg->height * $this->iY) ;
        }

        if ($this->iSize > 0 && $this->iSize < 1) {
            $this->iSize *= min($aImg->width, $aImg->height);
        }

        if ($this->iCenterSize > 0 && $this->iCenterSize < 1) {
            $this->iCenterSize *= $this->iSize;
        }

        $this->scale->AutoScale(($this->iSize - $this->iCenterSize)/2, round(2.5*$this->scale->iFontSize));

        $scaling = $this->iAntiAlias ? 2 : 1 ;

        $value = new Text();
        $value->SetFont($this->iFontFamily, $this->iFontStyle, $this->iFontSize*$scaling);
        $value->SetColor($this->iFontColor);

        $legendheight = round($this->legend->iShow ? 1 : 0);
        $legendheight *= max($this->legend->iCircleRadius*2, $this->legend->iTxtFontSize*2)+
        $this->legend->iMargin + $this->legend->iBottomMargin + 2;
        $legendheight *= $scaling;

        $w = $scaling*$this->getWidth($aImg);
        $h = $scaling*$this->getHeight($aImg);

        // Copy back the double buffered image to the proper canvas
        $ww = $w / $scaling ;
        $hh = $h / $scaling ;

        // Create the double buffer
        if ($this->iAntiAlias) {
            $dblImg = new RotImage($w, $h);
            // Set the background color
            $dblImg->SetColor($this->iColor);
            $dblImg->FilledRectangle(0, 0, $w, $h);
        } else {
            $dblImg = $aImg ;
            // Make sure the ix and it coordinates correpond to the new top left center
            $dblImg->SetTranslation($this->iX-$w/2, $this->iY-$h/2);
        }

        if (__DEBUG) {
            $dblImg->SetColor('red');
            $dblImg->Rectangle(0, 0, $w-1, $h-1);
        }

        $dblImg->SetColor('black');

        if ($this->iShowBox) {
            $dblImg->SetColor($this->iBoxColor);
            $old = $dblImg->SetLineWeight($this->iBoxWeight);
            $dblImg->SetLineStyle($this->iBoxStyle);
            $dblImg->Rectangle(0, 0, $w-1, $h-1);
            $dblImg->SetLineWeight($old);
        }

        $xc = round($w/2);
        $yc = round(($h-$legendheight)/2);

        if (__DEBUG) {
            $dblImg->SetColor('red');
            $old = $dblImg->SetLineWeight(2);
            $dblImg->Line($xc-5, $yc-5, $xc+5, $yc+5);
            $dblImg->Line($xc+5, $yc-5, $xc-5, $yc+5);
            $dblImg->SetLineWeight($old);
        }

        $this->iSize *= $scaling;

        // Inner circle size
        $ri = $this->iCenterSize/2 ;

        // Full circle radius
        $r = round($this->iSize/2);

        // Get number of grid circles
        $n = $this->scale->GetNumCirc();

        // Plot circle grids
        $ri *= $scaling ;
        $rr = round(($r-$ri)/$n);
        for ($i = 1; $i <= $n; ++$i) {
            $this->_ThickCircle(
                $dblImg,
                $xc,
                $yc,
                $rr*$i+$ri,
                $this->iCircGridWeight,
                $this->iGridColor1
            );
        }

        $num = 0 ;

        if ($this->iType == WINDROSE_TYPEFREE) {
            $this->_StrokeFreeRose($dblImg, $value, $scaling, $xc, $yc, $r, $ri);
        } else {
            // Check if we need to re-code the interpretation of the ordinal
            // number in the data. Internally ordinal value 0 is East and then
            // counted anti-clockwise. The user might choose an encoding
            // that have 0 being the first axis to the right of the "N" axis and then
            // counted clock-wise
            if ($this->iOrdinalEncoding == KEYENCODING_CLOCKWISE) {
                if ($this->iType == WINDROSE_TYPE16) {
                    $const1 = 19;
                    $const2 = 16;
                } elseif ($this->iType == WINDROSE_TYPE8) {
                    $const1 = 9;
                    $const2 = 8;
                } else {
                    $const1 = 4;
                    $const2 = 4;
                }
                $tmp = array();
                $n=count($this->iData);
                foreach ($this->iData as $key => $val) {
                    if (is_numeric($key)) {
                        $key = ($const1 - $key) % $const2 ;
                    }
                    $tmp[$key] = $val;
                }
                $this->iData = $tmp;
            }
            $this->_StrokeRegularRose($dblImg, $value, $scaling, $xc, $yc, $r, $ri);
        }

        // Stroke the labels
        $this->scale->iFontSize *= $scaling;
        $this->scale->iZFontSize *= $scaling;
        $this->scale->StrokeLabels($dblImg, $xc, $yc, $ri, $rr);

        // Stroke the inner circle again since the legs
        // might have written over it
        $this->_ThickCircle($dblImg, $xc, $yc, $ri, $this->iCircGridWeight, $this->iGridColor1);

        if ($ww > $aImg->width) {
            JpgraphError::RaiseL(22020);
            //('Windrose plot is too large to fit the specified Graph size. Please use WindrosePlot::SetSize() to make the plot smaller or increase the size of the Graph in the initial WindroseGraph() call.');
        }

        $x = $xc;
        $y = $h;
        $this->_StrokeLegend($dblImg, $x, $y, $scaling);

        if ($this->iAntiAlias) {
            $aImg->Copy($dblImg->img, $this->iX-$ww/2, $this->iY-$hh/2, 0, 0, $ww, $hh, $w, $h);
        }

        // We need to restore the translation matrix
        $aImg->SetTranslation(0, 0);
    }
}

//============================================================
// CLASS WindroseGraph
//============================================================
class WindroseGraph extends Graph
{
    private $posx;
    private $posy;
    public $plots=array();

    public function __construct($width=300, $height=200, $cachedName="", $timeout=0, $inline=1)
    {
        parent::__construct($width, $height, $cachedName, $timeout, $inline);
        $this->posx=$width/2;
        $this->posy=$height/2;
        $this->SetColor('white');
        $this->title->SetFont(FF_VERDANA, FS_NORMAL, 12);
        $this->title->SetMargin(8);
        $this->subtitle->SetFont(FF_VERDANA, FS_NORMAL, 10);
        $this->subtitle->SetMargin(0);
        $this->subsubtitle->SetFont(FF_VERDANA, FS_NORMAL, 8);
        $this->subsubtitle->SetMargin(0);
    }

    public function StrokeTexts()
    {
        if ($this->texts != null) {
            $n = count($this->texts);
            for ($i=0; $i < $n; ++$i) {
                $this->texts[$i]->Stroke($this->img);
            }
        }
    }

    public function StrokeIcons()
    {
        if ($this->iIcons != null) {
            $n = count($this->iIcons);
            for ($i=0; $i < $n; ++$i) {
                // Since Windrose graphs doesn't have any linear scale the position of
                // each icon has to be given as absolute coordinates
                $this->iIcons[$i]->_Stroke($this->img);
            }
        }
    }

    //---------------
    // PUBLIC METHODS
    public function Add($aObj)
    {
        if (is_array($aObj) && count($aObj) > 0) {
            $cl = $aObj[0];
        } else {
            $cl = $aObj;
        }
        if ($cl instanceof Text) {
            $this->AddText($aObj);
        } elseif ($cl instanceof IconPlot) {
            $this->AddIcon($aObj);
        } elseif (($cl instanceof WindrosePlot) || ($cl instanceof LayoutRect) || ($cl instanceof LayoutHor)) {
            $this->plots[] = $aObj;
        } else {
            JpgraphError::RaiseL(22021);
        }
    }

    public function AddText($aTxt, $aToY2=false)
    {
        parent::AddText($aTxt);
    }

    public function SetColor($c)
    {
        $this->SetMarginColor($c);
    }

    // Method description
    public function Stroke($aStrokeFileName="")
    {

        // If the filename is the predefined value = '_csim_special_'
        // we assume that the call to stroke only needs to do enough
        // to correctly generate the CSIM maps.
        // We use this variable to skip things we don't strictly need
        // to do to generate the image map to improve performance
        // as best we can. Therefore you will see a lot of tests !$_csim in the
        // code below.
        $_csim = ($aStrokeFileName===_CSIM_SPECIALFILE);

        // We need to know if we have stroked the plot in the
        // GetCSIMareas. Otherwise the CSIM hasn't been generated
        // and in the case of GetCSIM called before stroke to generate
        // CSIM without storing an image to disk GetCSIM must call Stroke.
        $this->iHasStroked = true;

        if ($this->background_image != "" || $this->background_cflag != "") {
            $this->StrokeFrameBackground();
        } else {
            $this->StrokeFrame();
        }

        // n holds number of plots
        $n = count($this->plots);
        for ($i=0; $i < $n ; ++$i) {
            $this->plots[$i]->Stroke($this);
        }

        $this->footer->Stroke($this->img);
        $this->StrokeIcons();
        $this->StrokeTexts();
        $this->StrokeTitles();

        // If the filename is given as the special "__handle"
        // then the image handler is returned and the image is NOT
        // streamed back
        if ($aStrokeFileName == _IMG_HANDLER) {
            return $this->img->img;
        } else {
            // Finally stream the generated picture
            $this->cache->PutAndStream(
                $this->img,
                $this->cache_name,
                $this->inline,
                $aStrokeFileName
            );
        }
    }
} // Class