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<?php |
/*======================================================================= |
// File: JPGRAPH_SCATTER.PHP |
// Description: Scatter (and impuls) plot extension for JpGraph |
// Created: 2001-02-11 |
// Author: Johan Persson (johanp@aditus.nu) |
// Ver: $Id: jpgraph_scatter.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 FieldArrow |
// Description: Draw an arrow at (x,y) with angle a |
//=================================================== |
class FieldArrow { |
var $iSize=10; // Length in pixels for arrow |
var $iArrowSize = 2; |
var $iColor='black'; |
var $isizespec = array( |
array(2,1),array(3,2),array(4,3),array(6,4),array(7,4),array(8,5),array(10,6),array(12,7),array(16,8),array(20,10)); |
function FieldArrow() { |
} |
|
function SetSize($aSize,$aArrowSize=2) { |
$this->iSize = $aSize; |
$this->iArrowSize = $aArrowSize; |
} |
|
function SetColor($aColor) { |
$this->iColor = $aColor; |
} |
|
function Stroke($aImg,$x,$y,$a) { |
$old_origin = $aImg->SetCenter($x,$y); |
$old_a = $aImg->SetAngle(-$a); |
|
$dx = round($this->iSize/2); |
$c = array($x-$dx,$y,$x+$dx,$y); |
$x += $dx; |
|
list($dx,$dy) = $this->isizespec[$this->iArrowSize]; |
$ca = array($x,$y,$x-$dx,$y-$dy,$x-$dx,$y+$dy,$x,$y); |
|
$aImg->SetColor($this->iColor); |
$aImg->Polygon($c); |
$aImg->FilledPolygon($ca); |
|
$aImg->SetCenter($old_origin[0],$old_origin[1]); |
$aImg->SetAngle($old_a); |
} |
} |
|
//=================================================== |
// CLASS FieldPlot |
// Description: Render a field plot |
//=================================================== |
class FieldPlot extends Plot { |
var $iAngles; |
var $iCallback=''; |
function FieldPlot($datay,$datax,$angles) { |
if( (count($datax) != count($datay)) ) |
JpGraphError::Raise("Fieldplots must have equal number of X and Y points."); |
if( (count($datax) != count($angles)) ) |
JpGraphError::Raise("Fieldplots must have an angle specified for each X and Y points."); |
|
$this->iAngles = $angles; |
|
$this->Plot($datay,$datax); |
$this->value->SetAlign('center','center'); |
$this->value->SetMargin(15); |
|
$this->arrow = new FieldArrow(); |
} |
|
function SetCallback($aFunc) { |
$this->iCallback = $aFunc; |
} |
|
function Stroke(&$img,&$xscale,&$yscale) { |
|
// Remeber base color and size |
$bc = $this->arrow->iColor; |
$bs = $this->arrow->iSize; |
$bas = $this->arrow->iArrowSize; |
|
for( $i=0; $i<$this->numpoints; ++$i ) { |
// Skip null values |
if( $this->coords[0][$i]==="" ) |
continue; |
|
$f = $this->iCallback; |
if( $f != "" ) { |
list($cc,$cs,$cas) = $f($this->coords[1][$i],$this->coords[0][$i], |
$this->iAngles[$i]); |
// Fall back on global data if the callback isn't set |
if( $cc == "" ) $cc = $bc; |
if( $cs == "" ) $cs = $bs; |
if( $cas == "" ) $cas = $bas; |
//echo "f=$f, cc=$cc, cs=$cs, cas=$cas<br>"; |
$this->arrow->SetColor($cc); |
$this->arrow->SetSize($cs,$cas); |
} |
|
$xt = $xscale->Translate($this->coords[1][$i]); |
$yt = $yscale->Translate($this->coords[0][$i]); |
|
$this->arrow->Stroke($img,$xt,$yt,$this->iAngles[$i]); |
$this->value->Stroke($img,$this->coords[0][$i],$xt,$yt); |
} |
} |
|
// Framework function |
function Legend(&$aGraph) { |
if( $this->legend != "" ) { |
$aGraph->legend->Add($this->legend,$this->mark->fill_color,$this->mark,0, |
$this->legendcsimtarget,$this->legendcsimalt); |
} |
} |
} |
|
//=================================================== |
// CLASS ScatterPlot |
// Description: Render X and Y plots |
//=================================================== |
class ScatterPlot extends Plot { |
var $impuls = false; |
var $linkpoints = false, $linkpointweight=1, $linkpointcolor="black"; |
//--------------- |
// CONSTRUCTOR |
function ScatterPlot($datay,$datax=false) { |
if( (count($datax) != count($datay)) && is_array($datax)) |
JpGraphError::Raise("Scatterplot must have equal number of X and Y points."); |
$this->Plot($datay,$datax); |
$this->mark = new PlotMark(); |
$this->mark->SetType(MARK_SQUARE); |
$this->mark->SetColor($this->color); |
$this->value->SetAlign('center','center'); |
$this->value->SetMargin(0); |
} |
|
//--------------- |
// PUBLIC METHODS |
function SetImpuls($f=true) { |
$this->impuls = $f; |
} |
|
// Combine the scatter plot points with a line |
function SetLinkPoints($aFlag=true,$aColor="black",$aWeight=1) { |
$this->linkpoints=$aFlag; |
$this->linkpointcolor=$aColor; |
$this->linkpointweight=$aWeight; |
} |
|
function Stroke(&$img,&$xscale,&$yscale) { |
|
$ymin=$yscale->scale_abs[0]; |
if( $yscale->scale[0] < 0 ) |
$yzero=$yscale->Translate(0); |
else |
$yzero=$yscale->scale_abs[0]; |
|
$this->csimareas = ''; |
for( $i=0; $i<$this->numpoints; ++$i ) { |
|
// Skip null values |
if( $this->coords[0][$i]==="" ) |
continue; |
|
if( isset($this->coords[1]) ) |
$xt = $xscale->Translate($this->coords[1][$i]); |
else |
$xt = $xscale->Translate($i); |
$yt = $yscale->Translate($this->coords[0][$i]); |
|
|
if( $this->linkpoints && isset($yt_old) ) { |
$img->SetColor($this->linkpointcolor); |
$img->SetLineWeight($this->linkpointweight); |
$img->Line($xt_old,$yt_old,$xt,$yt); |
} |
|
if( $this->impuls ) { |
$img->SetColor($this->color); |
$img->SetLineWeight($this->weight); |
$img->Line($xt,$yzero,$xt,$yt); |
} |
|
if( !empty($this->csimtargets[$i]) ) { |
$this->mark->SetCSIMTarget($this->csimtargets[$i]); |
$this->mark->SetCSIMAlt($this->csimalts[$i]); |
} |
|
if( isset($this->coords[1]) ) { |
$this->mark->SetCSIMAltVal($this->coords[0][$i],$this->coords[1][$i]); |
} |
else { |
$this->mark->SetCSIMAltVal($this->coords[0][$i],$i); |
} |
|
$this->mark->Stroke($img,$xt,$yt); |
|
$this->csimareas .= $this->mark->GetCSIMAreas(); |
$this->value->Stroke($img,$this->coords[0][$i],$xt,$yt); |
|
$xt_old = $xt; |
$yt_old = $yt; |
} |
} |
|
// Framework function |
function Legend(&$aGraph) { |
if( $this->legend != "" ) { |
$aGraph->legend->Add($this->legend,$this->mark->fill_color,$this->mark,0, |
$this->legendcsimtarget,$this->legendcsimalt); |
} |
} |
} // Class |
/* EOF */ |
?> |