Subversion Repositories Sites.tela-botanica.org

<?php

/*=======================================================================

// File:	JPGRAPH_RADAR.PHP

// Description: Radar plot extension for JpGraph

// Created: 	2001-02-04

// Author:	Johan Persson (johanp@aditus.nu)

// Ver:		$Id: jpgraph_radar.php,v 1.1 2004/06/15 10:13:19 jpm Exp $

//

// License:	This code is released under QPL

// Copyright (C) 2001,2002 Johan Persson

//========================================================================

*/

class RadarLogTicks extends Ticks {

//---------------

// CONSTRUCTOR

    function RadarLogTicks() {

    }

//---------------

// PUBLIC METHODS

    // TODO: Add Argument grid

    function Stroke(&$aImg,&$grid,$aPos,$aAxisAngle,&$aScale,&$aMajPos,&$aMajLabel) {

	$start = $aScale->GetMinVal();

	$limit = $aScale->GetMaxVal();

	$nextMajor = 10*$start;

	$step = $nextMajor / 10.0;

	$count=1;

	$ticklen_maj=5;

	$dx_maj=round(sin($aAxisAngle)*$ticklen_maj);

	$dy_maj=round(cos($aAxisAngle)*$ticklen_maj);

	$ticklen_min=3;

	$dx_min=round(sin($aAxisAngle)*$ticklen_min);

	$dy_min=round(cos($aAxisAngle)*$ticklen_min);

	$aMajPos=array();

	$aMajLabel=array();

	if( $this->supress_first )

	    $aMajLabel[]="";

	else

	    $aMajLabel[]=$start;

	$yr=$aScale->RelTranslate($start);

	$xt=round($yr*cos($aAxisAngle))+$aScale->scale_abs[0];

	$yt=$aPos-round($yr*sin($aAxisAngle));

	$aMajPos[]=$xt+2*$dx_maj;

	$aMajPos[]=$yt-$aImg->GetFontheight()/2;

	$grid[]=$xt;

	$grid[]=$yt;

	$aImg->SetLineWeight($this->weight);

	for($y=$start; $y<=$limit; $y+=$step,++$count  ) {

	    $yr=$aScale->RelTranslate($y);

	    $xt=round($yr*cos($aAxisAngle))+$aScale->scale_abs[0];

	    $yt=$aPos-round($yr*sin($aAxisAngle));

	    if( $count % 10 == 0 ) {

		$grid[]=$xt;

		$grid[]=$yt;

		$aMajPos[]=$xt+2*$dx_maj;

		$aMajPos[]=$yt-$aImg->GetFontheight()/2;

		if( !$this->supress_tickmarks )	{

		    if( $this->majcolor!="" ) $aImg->PushColor($this->majcolor);

		    $aImg->Line($xt+$dx_maj,$yt+$dy_maj,$xt-$dx_maj,$yt-$dy_maj);

		    if( $this->majcolor!="" ) $aImg->PopColor();

		}

		$aMajLabel[]=$nextMajor;

		$nextMajor *= 10;

		$step *= 10;

		$count=1;

	    }

	    else

		if( !$this->supress_minor_tickmarks )	{

		    if( $this->mincolor!="" ) $aImg->PushColor($this->mincolor);

		    $aImg->Line($xt+$dx_min,$yt+$dy_min,$xt-$dx_min,$yt-$dy_min);

		    if( $this->mincolor!="" ) $aImg->PopColor();

		}

	}

    }

}

class RadarLinearTicks extends LinearTicks {

//---------------

// CONSTRUCTOR

    function RadarLinearTicks() {

	// Empty

    }

//---------------

// PUBLIC METHODS

    // TODO: Add argument grid

    function Stroke(&$aImg,&$grid,$aPos,$aAxisAngle,&$aScale,&$aMajPos,&$aMajLabel) {

	// Prepare to draw linear ticks

	$maj_step_abs = abs($aScale->scale_factor*$this->major_step);

	$min_step_abs = abs($aScale->scale_factor*$this->minor_step);

	$nbrmaj = floor(($aScale->world_abs_size)/$maj_step_abs);

	$nbrmin = floor(($aScale->world_abs_size)/$min_step_abs);

	$skip = round($nbrmin/$nbrmaj); // Don't draw minor ontop of major

	// Draw major ticks

	$ticklen2=$this->major_abs_size;

	$dx=round(sin($aAxisAngle)*$ticklen2);

	$dy=round(cos($aAxisAngle)*$ticklen2);

	$label=$aScale->scale[0]+$this->major_step;

	$aImg->SetLineWeight($this->weight);

	for($i=1; $i<=$nbrmaj; ++$i) {

	    $xt=round($i*$maj_step_abs*cos($aAxisAngle))+$aScale->scale_abs[0];

	    $yt=$aPos-round($i*$maj_step_abs*sin($aAxisAngle));

	    $aMajLabel[]=$label;

	    $label += $this->major_step;

	    $grid[]=$xt;

	    $grid[]=$yt;

	    $aMajPos[($i-1)*2]=$xt+2*$dx;

	    $aMajPos[($i-1)*2+1]=$yt-$aImg->GetFontheight()/2;

	    if( !$this->supress_tickmarks ) {

		if( $this->majcolor!="" ) $aImg->PushColor($this->majcolor);

		$aImg->Line($xt+$dx,$yt+$dy,$xt-$dx,$yt-$dy);

		if( $this->majcolor!="" ) $aImg->PopColor();

	    }

	}

	// Draw minor ticks

	$ticklen2=$this->minor_abs_size;

	$dx=round(sin($aAxisAngle)*$ticklen2);

	$dy=round(cos($aAxisAngle)*$ticklen2);

	if( !$this->supress_tickmarks && !$this->supress_minor_tickmarks)	{

	    if( $this->mincolor!="" ) $aImg->PushColor($this->mincolor);

	    for($i=1; $i<=$nbrmin; ++$i) {

		if( ($i % $skip) == 0 ) continue;

		$xt=round($i*$min_step_abs*cos($aAxisAngle))+$aScale->scale_abs[0];

		$yt=$aPos-round($i*$min_step_abs*sin($aAxisAngle));

		$aImg->Line($xt+$dx,$yt+$dy,$xt-$dx,$yt-$dy);

	    }

	    if( $this->mincolor!="" ) $aImg->PopColor();

	}

    }

}

//===================================================

// CLASS RadarAxis

// Description: Implements axis for the spider graph

//===================================================

class RadarAxis extends Axis {

    var $title_color="navy";

    var $title=null;

//---------------

// CONSTRUCTOR

    function RadarAxis(&$img,&$aScale,$color=array(0,0,0)) {

	parent::Axis($img,$aScale,$color);

	$this->len=$img->plotheight;

	$this->title = new Text();

	$this->title->SetFont(FF_FONT1,FS_BOLD);

	$this->color = array(0,0,0);

    }

//---------------

// PUBLIC METHODS

    function SetTickLabels($l) {

	$this->ticks_label = $l;

    }

    // Stroke the axis

    // $pos 			= Vertical position of axis

    // $aAxisAngle = Axis angle

    // $grid			= Returns an array with positions used to draw the grid

    //	$lf			= Label flag, TRUE if the axis should have labels

    function Stroke($pos,$aAxisAngle,&$grid,$title,$lf) {

	$this->img->SetColor($this->color);

	// Determine end points for the axis

	$x=round($this->scale->world_abs_size*cos($aAxisAngle)+$this->scale->scale_abs[0]);

	$y=round($pos-$this->scale->world_abs_size*sin($aAxisAngle));

	// Draw axis

	$this->img->SetColor($this->color);

	$this->img->SetLineWeight($this->weight);

	if( !$this->hide )

	    $this->img->Line($this->scale->scale_abs[0],$pos,$x,$y);

	$this->scale->ticks->Stroke($this->img,$grid,$pos,$aAxisAngle,$this->scale,$majpos,$majlabel);

	// Draw labels

	if( $lf && !$this->hide ) {

	    $this->img->SetFont($this->font_family,$this->font_style,$this->font_size);

	    $this->img->SetTextAlign("left","top");

	    $this->img->SetColor($this->color);

	    // majpos contsins (x,y) coordinates for labels

	    for($i=0; $i<count($majpos)/2; ++$i) {

		if( $this->ticks_label != null )

		    $this->img->StrokeText($majpos[$i*2],$majpos[$i*2+1],$this->ticks_label[$i]);

		else

		    $this->img->StrokeText($majpos[$i*2],$majpos[$i*2+1],$majlabel[$i]);

	    }

	}

	$this->_StrokeAxisTitle($pos,$aAxisAngle,$title);

    }

//---------------

// PRIVATE METHODS

    function _StrokeAxisTitle($pos,$aAxisAngle,$title) {

	$this->title->Set($title);

	$marg=6+$this->title->margin;

	$xt=round(($this->scale->world_abs_size+$marg)*cos($aAxisAngle)+$this->scale->scale_abs[0]);

	$yt=round($pos-($this->scale->world_abs_size+$marg)*sin($aAxisAngle));

	// 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.

	$h=$this->img->GetFontHeight();

	$w=$this->img->GetTextWidth($title);

	while( $aAxisAngle > 2*M_PI ) $aAxisAngle -= 2*M_PI;

	if( $aAxisAngle>=7*M_PI/4 || $aAxisAngle <= M_PI/4 ) $dx=0;

	if( $aAxisAngle>=M_PI/4 && $aAxisAngle <= 3*M_PI/4 ) $dx=($aAxisAngle-M_PI/4)*2/M_PI;

	if( $aAxisAngle>=3*M_PI/4 && $aAxisAngle <= 5*M_PI/4 ) $dx=1;

	if( $aAxisAngle>=5*M_PI/4 && $aAxisAngle <= 7*M_PI/4 ) $dx=(1-($aAxisAngle-M_PI*5/4)*2/M_PI);

	if( $aAxisAngle>=7*M_PI/4 ) $dy=(($aAxisAngle-M_PI)-3*M_PI/4)*2/M_PI;

	if( $aAxisAngle<=M_PI/4 ) $dy=(1-$aAxisAngle*2/M_PI);

	if( $aAxisAngle>=M_PI/4 && $aAxisAngle <= 3*M_PI/4 ) $dy=1;

	if( $aAxisAngle>=3*M_PI/4 && $aAxisAngle <= 5*M_PI/4 ) $dy=(1-($aAxisAngle-3*M_PI/4)*2/M_PI);

	if( $aAxisAngle>=5*M_PI/4 && $aAxisAngle <= 7*M_PI/4 ) $dy=0;

	if( !$this->hide )

		$this->title->Stroke($this->img,$xt-$dx*$w,$yt-$dy*$h,$title);

    }

} // Class

//===================================================

// CLASS RadarGrid

// Description: Draws grid for the spider graph

//===================================================

class RadarGrid extends Grid {

//------------

// CONSTRUCTOR

    function RadarGrid() {

    }

//----------------

// PRIVATE METHODS

    function Stroke(&$img,&$grid) {

	if( !$this->show ) return;

	$nbrticks = count($grid[0])/2;

	$nbrpnts = count($grid);

	$img->SetColor($this->grid_color);

	$img->SetLineWeight($this->weight);

	for($i=0; $i<$nbrticks; ++$i) {

	    for($j=0; $j<$nbrpnts; ++$j) {

		$pnts[$j*2]=$grid[$j][$i*2];

		$pnts[$j*2+1]=$grid[$j][$i*2+1];

	    }

	    for($k=0; $k<$nbrpnts; ++$k ){

		$l=($k+1)%$nbrpnts;

		if( $this->type == "solid" )

		    $img->Line($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1]);

		elseif( $this->type == "dotted" )

		    $img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],1,6);

		elseif( $this->type == "dashed" )

		    $img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],2,4);

		elseif( $this->type == "longdashed" )

		    $img->DashedLine($pnts[$k*2],$pnts[$k*2+1],$pnts[$l*2],$pnts[$l*2+1],8,6);

	    }

	    $pnts=array();

	}

    }

} // Class

//===================================================

// CLASS RadarPlot

// Description: Plot a spiderplot

//===================================================

class RadarPlot {

    var $data=array();

    var $fill=false, $fill_color=array(200,170,180);

    var $color=array(0,0,0);

    var $legend="";

    var $weight=1;

//---------------

// CONSTRUCTOR

    function RadarPlot($data) {

	$this->data = $data;

    }

//---------------

// PUBLIC METHODS

    function Min() {

	return Min($this->data);

    }

    function Max() {

	return Max($this->data);

    }

    function SetLegend($legend) {

	$this->legend=$legend;

    }

    function SetLineWeight($w) {

	$this->weight=$w;

    }

	function SetFillColor($aColor) {

		$this->fill_color = $aColor;

		$this->fill = true;

	}

    function SetFill($f=true) {

	$this->fill = $f;

    }

    function SetColor($aColor,$aFillColor=false) {

	$this->color = $aColor;

	if( $aFillColor ) {

	    $this->SetFillColor($aFillColor);

	    $this->fill = true;

	}

    }

    function GetCSIMareas() {

	JpGraphError::Raise("Client side image maps not supported for RadarPlots.");

    }

    function Stroke(&$img, $pos, &$scale, $startangle) {

	$nbrpnts = count($this->data);

	$astep=2*M_PI/$nbrpnts;

	$a=$startangle;

	// Rotate each point to the correct axis-angle

	// TODO: Update for LogScale

	for($i=0; $i<$nbrpnts; ++$i) {

	    //$c=$this->data[$i];

	    $cs=$scale->RelTranslate($this->data[$i]);

	    $x=round($cs*cos($a)+$scale->scale_abs[0]);

	    $y=round($pos-$cs*sin($a));

	    /*

	      $c=log10($c);

	      $x=round(($c-$scale->scale[0])*$scale->scale_factor*cos($a)+$scale->scale_abs[0]);

	      $y=round($pos-($c-$scale->scale[0])*$scale->scale_factor*sin($a));

	    */

	    $pnts[$i*2]=$x;

	    $pnts[$i*2+1]=$y;

	    $a += $astep;

	}

	if( $this->fill ) {

	    $img->SetColor($this->fill_color);

	    $img->FilledPolygon($pnts);

	}

	$img->SetLineWeight($this->weight);

	$img->SetColor($this->color);

	$pnts[]=$pnts[0];

	$pnts[]=$pnts[1];

	$img->Polygon($pnts);

    }

//---------------

// PRIVATE METHODS

    function GetCount() {

	return count($this->data);

    }

    function Legend(&$graph) {

	if( $this->legend=="" ) return;

	if( $this->fill )

	    $graph->legend->Add($this->legend,$this->fill_color);

	else

	    $graph->legend->Add($this->legend,$this->color);

    }

} // Class

//===================================================

// CLASS RadarGraph

// Description: Main container for a spider graph

//===================================================

class RadarGraph extends Graph {

    var $posx;

    var $posy;

    var $len;

    var $plots=null, $axis_title=null;

    var $grid,$axis=null;

//---------------

// CONSTRUCTOR

    function RadarGraph($width=300,$height=200,$cachedName="",$timeout=0,$inline=1) {

	$this->Graph($width,$height,$cachedName,$timeout,$inline);

	$this->posx=$width/2;

	$this->posy=$height/2;

	$this->len=min($width,$height)*0.35;

	$this->SetColor(array(255,255,255));

	$this->SetTickDensity(TICKD_NORMAL);

	$this->SetScale("lin");

    }

//---------------

// PUBLIC METHODS

    function SupressTickMarks($f=true) {

    	if( ERR_DEPRECATED )

    		JpGraphError::Raise('RadarGraph::SupressTickMarks() is deprecated. Use HideTickMarks() instead.');

		$this->axis->scale->ticks->SupressTickMarks($f);

    }

    function HideTickMarks($aFlag=true) {

		$this->axis->scale->ticks->SupressTickMarks($aFlag);

    }

    function ShowMinorTickmarks($aFlag=true) {

    	$this->yscale->ticks->SupressMinorTickMarks(!$aFlag);

    }

    function SetScale($axtype,$ymin=1,$ymax=1) {

	if( $axtype != "lin" && $axtype != "log" ) {

	    JpGraphError::Raise("Illegal scale for spiderplot ($axtype). Must be \"lin\" or \"log\"");

	}

	if( $axtype=="lin" ) {

	    $this->yscale = & new LinearScale($ymin,$ymax);

	    $this->yscale->ticks = & new RadarLinearTicks();

	    $this->yscale->ticks->SupressMinorTickMarks();

	}

	elseif( $axtype=="log" ) {

	    $this->yscale = & new LogScale($ymin,$ymax);

	    $this->yscale->ticks = & new RadarLogTicks();

	}

	$this->axis = & new RadarAxis($this->img,$this->yscale);

	$this->grid = & new RadarGrid();

    }

    function SetSize($aSize) {

	if( $aSize<0.1 || $aSize>1 )

	    JpGraphError::Raise("Radar Plot size must be between 0.1 and 1. (Your value=$s)");

	$this->len=min($this->img->width,$this->img->height)*$aSize/2;

    }

    function SetPlotSize($aSize) {

	$this->SetSize($aSize);

    }

    function SetTickDensity($densy=TICKD_NORMAL) {

	$this->ytick_factor=25;

	switch( $densy ) {

	    case TICKD_DENSE:

		$this->ytick_factor=12;

	    break;

	    case TICKD_NORMAL:

		$this->ytick_factor=25;

	    break;

	    case TICKD_SPARSE:

		$this->ytick_factor=40;

	    break;

	    case TICKD_VERYSPARSE:

		$this->ytick_factor=70;

	    break;

	    default:

		JpGraphError::Raise("RadarPlot Unsupported Tick density: $densy");

	}

    }

    function SetPos($px,$py=0.5) {

	$this->SetCenter($px,$py);

    }

    function SetCenter($px,$py=0.5) {

	assert($px > 0 && $py > 0 );

	$this->posx=$this->img->width*$px;

	$this->posy=$this->img->height*$py;

    }

    function SetColor($c) {

	$this->SetMarginColor($c);

    }

    function SetTitles($title) {

	$this->axis_title = $title;

    }

    function Add(&$splot) {

	$this->plots[]=$splot;

    }

    function GetPlotsYMinMax() {

	$min=$this->plots[0]->Min();

	$max=$this->plots[0]->Max();

	foreach( $this->plots as $p ) {

	    $max=max($max,$p->Max());

	    $min=min($min,$p->Min());

	}

	if( $min < 0 )

	    JpGraphError::Raise("Minimum data $min (Radar plots only makes sence to use when all data points > 0)");

	return array($min,$max);

    }

    // Stroke the Radar graph

    function Stroke($aStrokeFileName="") {

	// Set Y-scale

	if( !$this->yscale->IsSpecified() && count($this->plots)>0 ) {

	    list($min,$max) = $this->GetPlotsYMinMax();

	    $this->yscale->AutoScale($this->img,0,$max,$this->len/$this->ytick_factor);

	}

	// Set start position end length of scale (in absolute pixels)

	$this->yscale->SetConstants($this->posx,$this->len);

	// We need as many axis as there are data points

	$nbrpnts=$this->plots[0]->GetCount();

	// If we have no titles just number the axis 1,2,3,...

	if( $this->axis_title==null ) {

	    for($i=0; $i<$nbrpnts; ++$i )

		$this->axis_title[$i] = $i+1;

	}

	elseif(count($this->axis_title)<$nbrpnts)

	    JpGraphError::Raise("Number of titles does not match number of points in plot.");

	for($i=0; $i<count($this->plots); ++$i )

	    if( $nbrpnts != $this->plots[$i]->GetCount() )

		JpGraphError::Raise("Each spider plot must have the same number of data points.");

	if( $this->background_image != "" ) {

	    $this->StrokeFrameBackground();

	}

	else {

	    $this->StrokeFrame();

	}

	$astep=2*M_PI/$nbrpnts;

	// Prepare legends

	for($i=0; $i<count($this->plots); ++$i)

	    $this->plots[$i]->Legend($this);

	$this->legend->Stroke($this->img);

	$this->footer->Stroke($this->img);

	// Plot points

	$a=M_PI/2;

	for($i=0; $i<count($this->plots); ++$i )

	    $this->plots[$i]->Stroke($this->img, $this->posy, $this->yscale, $a);

	// Draw axis and grid

	for( $i=0,$a=M_PI/2; $i<$nbrpnts; ++$i, $a+=$astep ) {

	    $this->axis->Stroke($this->posy,$a,$grid[$i],$this->axis_title[$i],$i==0);

	}

	$this->grid->Stroke($this->img,$grid);

	$this->StrokeTitles();

	// Stroke texts

	if( $this->texts != null )

	    foreach( $this->texts as $t)

		$t->Stroke($this->img);

	// 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

/* EOF */

?>