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Apr 13, 2019, 8:05:15 PM (6 years ago)
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roby
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  • trunk/client/modules/Elezioni/grafici/jpgraph_plotband.php

    r2 r265  
    11<?php
    22//=======================================================================
    3 // File:        JPGRAPH_PLOTBAND.PHP
    4 // Description: PHP4 Graph Plotting library. Extension module.
    5 // Created:     2004-02-18
    6 // Ver:         $Id: jpgraph_plotband.php 1091 2009-01-18 22:57:40Z ljp $
     3// File:        JPGRAPH_PLOTBAND.PHP
     4// Description: PHP4 Graph Plotting library. Extension module.
     5// Created:     2004-02-18
     6// Ver:         $Id: jpgraph_plotband.php 1106 2009-02-22 20:16:35Z ljp $
    77//
    8 // Copyright (c) Aditus Consulting. All rights reserved.
     8// Copyright (c) Asial Corporation. All rights reserved.
    99//========================================================================
    1010
    1111// Constants for types of static bands in plot area
    12 define("BAND_RDIAG",1); // Right diagonal lines
     12define("BAND_RDIAG",1); // Right diagonal lines
    1313define("BAND_LDIAG",2); // Left diagonal lines
    1414define("BAND_SOLID",3); // Solid one color
     
    2424    public $x,$y,$w,$h;
    2525    public $xe, $ye;
    26     function Rectangle($aX,$aY,$aWidth,$aHeight) {
    27         $this->x=$aX;
    28         $this->y=$aY;
    29         $this->w=$aWidth;
    30         $this->h=$aHeight;
    31         $this->xe=$aX+$aWidth-1;
    32         $this->ye=$aY+$aHeight-1;
     26    function __construct($aX,$aY,$aWidth,$aHeight) {
     27        $this->x=$aX;
     28        $this->y=$aY;
     29        $this->w=$aWidth;
     30        $this->h=$aHeight;
     31        $this->xe=$aX+$aWidth-1;
     32        $this->ye=$aY+$aHeight-1;
    3333    }
    3434}
     
    4646    protected $rect=null;
    4747    protected $doframe=true;
    48     protected $linespacing;     // Line spacing in pixels
     48    protected $linespacing; // Line spacing in pixels
    4949    protected $iBackgroundColor=-1;  // Default is no background fill
    50        
    51     function RectPattern($aColor,$aWeight=1) {
    52         $this->color = $aColor;
    53         $this->weight = $aWeight;               
     50
     51    function __construct($aColor,$aWeight=1) {
     52        $this->color = $aColor;
     53        $this->weight = $aWeight;
    5454    }
    5555
    5656    function SetBackground($aBackgroundColor) {
    57         $this->iBackgroundColor=$aBackgroundColor;
     57        $this->iBackgroundColor=$aBackgroundColor;
    5858    }
    5959
    6060    function SetPos($aRect) {
    61         $this->rect = $aRect;
    62     }
    63        
     61        $this->rect = $aRect;
     62    }
     63
    6464    function ShowFrame($aShow=true) {
    65         $this->doframe=$aShow;
     65        $this->doframe=$aShow;
    6666    }
    6767
    6868    function SetDensity($aDens) {
    69         if( $aDens < 1 || $aDens > 100 )
    70             JpGraphError::RaiseL(16001,$aDens);
    71 //(" Desity for pattern must be between 1 and 100. (You tried $aDens)");
    72         // 1% corresponds to linespacing=50
    73         // 100 % corresponds to linespacing 1
    74         $this->linespacing = floor(((100-$aDens)/100.0)*50)+1;
     69        if( $aDens < 1 || $aDens > 100 )
     70        JpGraphError::RaiseL(16001,$aDens);
     71        //(" Desity for pattern must be between 1 and 100. (You tried $aDens)");
     72        // 1% corresponds to linespacing=50
     73        // 100 % corresponds to linespacing 1
     74        $this->linespacing = floor(((100-$aDens)/100.0)*50)+1;
    7575
    7676    }
    7777
    7878    function Stroke($aImg) {
    79         if( $this->rect == null )
    80             JpGraphError::RaiseL(16002);
    81 //(" No positions specified for pattern.");
    82 
    83         if( !(is_numeric($this->iBackgroundColor) && $this->iBackgroundColor==-1) ) {
    84             $aImg->SetColor($this->iBackgroundColor);
    85             $aImg->FilledRectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
    86         }
    87 
    88         $aImg->SetColor($this->color);
    89         $aImg->SetLineWeight($this->weight);
    90 
    91         // Virtual function implemented by subclass
    92         $this->DoPattern($aImg);
    93 
    94         // Frame around the pattern area
    95         if( $this->doframe )
    96             $aImg->Rectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
     79        if( $this->rect == null )
     80        JpGraphError::RaiseL(16002);
     81        //(" No positions specified for pattern.");
     82
     83        if( !(is_numeric($this->iBackgroundColor) && $this->iBackgroundColor==-1) ) {
     84            $aImg->SetColor($this->iBackgroundColor);
     85            $aImg->FilledRectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
     86        }
     87
     88        $aImg->SetColor($this->color);
     89        $aImg->SetLineWeight($this->weight);
     90
     91        // Virtual function implemented by subclass
     92        $this->DoPattern($aImg);
     93
     94        // Frame around the pattern area
     95        if( $this->doframe )
     96        $aImg->Rectangle($this->rect->x,$this->rect->y,$this->rect->xe,$this->rect->ye);
    9797    }
    9898
     
    106106class RectPatternSolid extends RectPattern {
    107107
    108     function RectPatternSolid($aColor="black",$aWeight=1) {
    109         parent::RectPattern($aColor,$aWeight);
    110     }
    111 
    112     function DoPattern($aImg) {
    113         $aImg->SetColor($this->color);
    114         $aImg->FilledRectangle($this->rect->x,$this->rect->y,
    115                                $this->rect->xe,$this->rect->ye);
     108    function __construct($aColor="black",$aWeight=1) {
     109        parent::__construct($aColor,$aWeight);
     110    }
     111
     112    function DoPattern($aImg) {
     113        $aImg->SetColor($this->color);
     114        $aImg->FilledRectangle($this->rect->x,$this->rect->y,
     115        $this->rect->xe,$this->rect->ye);
    116116    }
    117117}
     
    122122//=====================================================================
    123123class RectPatternHor extends RectPattern {
    124                
    125     function RectPatternHor($aColor="black",$aWeight=1,$aLineSpacing=7) {
    126         parent::RectPattern($aColor,$aWeight);
    127         $this->linespacing = $aLineSpacing;
    128     }
    129                
    130     function DoPattern($aImg) {
    131         $x0 = $this->rect->x;           
    132         $x1 = $this->rect->xe;
    133         $y = $this->rect->y;
    134         while( $y < $this->rect->ye ) {
    135             $aImg->Line($x0,$y,$x1,$y);
    136             $y += $this->linespacing;
    137         }
     124
     125    function __construct($aColor="black",$aWeight=1,$aLineSpacing=7) {
     126        parent::__construct($aColor,$aWeight);
     127        $this->linespacing = $aLineSpacing;
     128    }
     129
     130    function DoPattern($aImg) {
     131        $x0 = $this->rect->x;
     132        $x1 = $this->rect->xe;
     133        $y = $this->rect->y;
     134        while( $y < $this->rect->ye ) {
     135            $aImg->Line($x0,$y,$x1,$y);
     136            $y += $this->linespacing;
     137        }
    138138    }
    139139}
     
    144144//=====================================================================
    145145class RectPatternVert extends RectPattern {
    146                
    147     function RectPatternVert($aColor="black",$aWeight=1,$aLineSpacing=7) {
    148         parent::RectPattern($aColor,$aWeight);
    149         $this->linespacing = $aLineSpacing;
     146
     147    function __construct($aColor="black",$aWeight=1,$aLineSpacing=7) {
     148        parent::__construct($aColor,$aWeight);
     149        $this->linespacing = $aLineSpacing;
    150150    }
    151151
     
    154154    //
    155155    function DoPattern($aImg) {
    156         $x = $this->rect->x;           
    157         $y0 = $this->rect->y;
    158         $y1 = $this->rect->ye;
    159         while( $x < $this->rect->xe ) {
    160             $aImg->Line($x,$y0,$x,$y1);
    161             $x += $this->linespacing;
    162         }
     156        $x = $this->rect->x;
     157        $y0 = $this->rect->y;
     158        $y1 = $this->rect->ye;
     159        while( $x < $this->rect->xe ) {
     160            $aImg->Line($x,$y0,$x,$y1);
     161            $x += $this->linespacing;
     162        }
    163163    }
    164164}
     
    170170//=====================================================================
    171171class RectPatternRDiag extends RectPattern {
    172                
    173     function RectPatternRDiag($aColor="black",$aWeight=1,$aLineSpacing=12) {
    174         parent::RectPattern($aColor,$aWeight);
    175         $this->linespacing = $aLineSpacing;
    176     }
    177 
    178     function DoPattern($aImg) {
    179         //  --------------------
    180         //  | /   /   /   /   /|
    181         //  |/   /   /   /   / |
    182         //  |   /   /   /   /  |
    183         //  --------------------
    184         $xe = $this->rect->xe;
    185         $ye = $this->rect->ye;
    186         $x0 = $this->rect->x + round($this->linespacing/2);
    187         $y0 = $this->rect->y;
    188         $x1 = $this->rect->x;
    189         $y1 = $this->rect->y + round($this->linespacing/2);
    190 
    191         while($x0<=$xe && $y1<=$ye) {
    192             $aImg->Line($x0,$y0,$x1,$y1);
    193             $x0 += $this->linespacing;
    194             $y1 += $this->linespacing;
    195         }
    196 
    197         if( $xe-$x1 > $ye-$y0 ) {
    198             // Width larger than height
    199             $x1 = $this->rect->x + ($y1-$ye);
    200             $y1 = $ye;
    201             $y0 = $this->rect->y;
    202             while( $x0 <= $xe ) {
    203                 $aImg->Line($x0,$y0,$x1,$y1);
    204                 $x0 += $this->linespacing;
    205                 $x1 += $this->linespacing;
    206             }
    207            
    208             $y0=$this->rect->y + ($x0-$xe);
    209             $x0=$xe;
    210         }
    211         else {
    212             // Height larger than width
    213             $diff = $x0-$xe;
    214             $y0 = $diff+$this->rect->y;
    215             $x0 = $xe;
    216             $x1 = $this->rect->x;
    217             while( $y1 <= $ye ) {
    218                 $aImg->Line($x0,$y0,$x1,$y1);
    219                 $y1 += $this->linespacing;
    220                 $y0 += $this->linespacing;
    221             }
    222            
    223             $diff = $y1-$ye;
    224             $y1 = $ye;
    225             $x1 = $diff + $this->rect->x;
    226         }
    227 
    228         while( $y0 <= $ye ) {
    229             $aImg->Line($x0,$y0,$x1,$y1);
    230             $y0 += $this->linespacing;         
    231             $x1 += $this->linespacing;
    232         }
    233     }
    234 }
    235  
     172
     173    function __construct($aColor="black",$aWeight=1,$aLineSpacing=12) {
     174        parent::__construct($aColor,$aWeight);
     175        $this->linespacing = $aLineSpacing;
     176    }
     177
     178    function DoPattern($aImg) {
     179        //  --------------------
     180        //  | /   /   /   /   /|
     181        //  |/   /   /   /   / |
     182        //  |   /   /   /   /  |
     183        //  --------------------
     184        $xe = $this->rect->xe;
     185        $ye = $this->rect->ye;
     186        $x0 = $this->rect->x + round($this->linespacing/2);
     187        $y0 = $this->rect->y;
     188        $x1 = $this->rect->x;
     189        $y1 = $this->rect->y + round($this->linespacing/2);
     190
     191        while($x0<=$xe && $y1<=$ye) {
     192            $aImg->Line($x0,$y0,$x1,$y1);
     193            $x0 += $this->linespacing;
     194            $y1 += $this->linespacing;
     195        }
     196
     197        if( $xe-$x1 > $ye-$y0 ) {
     198            // Width larger than height
     199            $x1 = $this->rect->x + ($y1-$ye);
     200            $y1 = $ye;
     201            $y0 = $this->rect->y;
     202            while( $x0 <= $xe ) {
     203                $aImg->Line($x0,$y0,$x1,$y1);
     204                $x0 += $this->linespacing;
     205                $x1 += $this->linespacing;
     206            }
     207            
     208            $y0=$this->rect->y + ($x0-$xe);
     209            $x0=$xe;
     210        }
     211        else {
     212            // Height larger than width
     213            $diff = $x0-$xe;
     214            $y0 = $diff+$this->rect->y;
     215            $x0 = $xe;
     216            $x1 = $this->rect->x;
     217            while( $y1 <= $ye ) {
     218                $aImg->Line($x0,$y0,$x1,$y1);
     219                $y1 += $this->linespacing;
     220                $y0 += $this->linespacing;
     221            }
     222            
     223            $diff = $y1-$ye;
     224            $y1 = $ye;
     225            $x1 = $diff + $this->rect->x;
     226        }
     227
     228        while( $y0 <= $ye ) {
     229            $aImg->Line($x0,$y0,$x1,$y1);
     230            $y0 += $this->linespacing;
     231            $x1 += $this->linespacing;
     232        }
     233    }
     234}
     235
    236236//=====================================================================
    237237// Class RectPatternLDiag
     
    239239//=====================================================================
    240240class RectPatternLDiag extends RectPattern {
    241                
    242     function RectPatternLDiag($aColor="black",$aWeight=1,$aLineSpacing=12) {
    243         $this->linespacing = $aLineSpacing;
    244         parent::RectPattern($aColor,$aWeight);
    245     }
    246 
    247     function DoPattern($aImg) {
    248         //  --------------------
    249         //  |\   \   \   \   \ |
    250         //  | \   \   \   \   \|
    251         //  |  \   \   \   \   |
    252         //  |------------------|
    253         $xe = $this->rect->xe;
    254         $ye = $this->rect->ye;
    255         $x0 = $this->rect->x + round($this->linespacing/2);
    256         $y0 = $this->rect->ye;
    257         $x1 = $this->rect->x;
    258         $y1 = $this->rect->ye - round($this->linespacing/2);
    259 
    260         while($x0<=$xe && $y1>=$this->rect->y) {
    261             $aImg->Line($x0,$y0,$x1,$y1);
    262             $x0 += $this->linespacing;
    263             $y1 -= $this->linespacing;
    264         }
    265         if( $xe-$x1 > $ye-$this->rect->y ) {
    266             // Width larger than height
    267             $x1 = $this->rect->x + ($this->rect->y-$y1);
    268             $y0=$ye; $y1=$this->rect->y;
    269             while( $x0 <= $xe ) {
    270                 $aImg->Line($x0,$y0,$x1,$y1);
    271                 $x0 += $this->linespacing;
    272                 $x1 += $this->linespacing;
    273             }
    274            
    275             $y0=$this->rect->ye - ($x0-$xe);
    276             $x0=$xe;
    277         }
    278         else {
    279             // Height larger than width
    280             $diff = $x0-$xe;
    281             $y0 = $ye-$diff;
    282             $x0 = $xe;
    283             while( $y1 >= $this->rect->y ) {
    284                 $aImg->Line($x0,$y0,$x1,$y1);
    285                 $y0 -= $this->linespacing;
    286                 $y1 -= $this->linespacing;
    287             }       
    288             $diff = $this->rect->y - $y1;
    289             $x1 = $this->rect->x + $diff;
    290             $y1 = $this->rect->y;
    291         }
    292         while( $y0 >= $this->rect->y ) {
    293             $aImg->Line($x0,$y0,$x1,$y1);
    294             $y0 -= $this->linespacing;
    295             $x1 += $this->linespacing;
    296         }
     241
     242    function __construct($aColor="black",$aWeight=1,$aLineSpacing=12) {
     243        $this->linespacing = $aLineSpacing;
     244        parent::__construct($aColor,$aWeight);
     245    }
     246
     247    function DoPattern($aImg) {
     248        //  --------------------
     249        //  |\   \   \   \   \ |
     250        //  | \   \   \   \   \|
     251        //  |  \   \   \   \   |
     252        //  |------------------|
     253        $xe = $this->rect->xe;
     254        $ye = $this->rect->ye;
     255        $x0 = $this->rect->x + round($this->linespacing/2);
     256        $y0 = $this->rect->ye;
     257        $x1 = $this->rect->x;
     258        $y1 = $this->rect->ye - round($this->linespacing/2);
     259
     260        while($x0<=$xe && $y1>=$this->rect->y) {
     261            $aImg->Line($x0,$y0,$x1,$y1);
     262            $x0 += $this->linespacing;
     263            $y1 -= $this->linespacing;
     264        }
     265        if( $xe-$x1 > $ye-$this->rect->y ) {
     266            // Width larger than height
     267            $x1 = $this->rect->x + ($this->rect->y-$y1);
     268            $y0=$ye; $y1=$this->rect->y;
     269            while( $x0 <= $xe ) {
     270                $aImg->Line($x0,$y0,$x1,$y1);
     271                $x0 += $this->linespacing;
     272                $x1 += $this->linespacing;
     273            }
     274            
     275            $y0=$this->rect->ye - ($x0-$xe);
     276            $x0=$xe;
     277        }
     278        else {
     279            // Height larger than width
     280            $diff = $x0-$xe;
     281            $y0 = $ye-$diff;
     282            $x0 = $xe;
     283            while( $y1 >= $this->rect->y ) {
     284                $aImg->Line($x0,$y0,$x1,$y1);
     285                $y0 -= $this->linespacing;
     286                $y1 -= $this->linespacing;
     287            }
     288            $diff = $this->rect->y - $y1;
     289            $x1 = $this->rect->x + $diff;
     290            $y1 = $this->rect->y;
     291        }
     292        while( $y0 >= $this->rect->y ) {
     293            $aImg->Line($x0,$y0,$x1,$y1);
     294            $y0 -= $this->linespacing;
     295            $x1 += $this->linespacing;
     296        }
    297297    }
    298298}
     
    308308    // converge.
    309309
    310     function RectPattern3DPlane($aColor="black",$aWeight=1) {
    311         parent::RectPattern($aColor,$aWeight);
    312         $this->SetDensity(10);  // Slightly larger default
     310    function __construct($aColor="black",$aWeight=1) {
     311        parent::__construct($aColor,$aWeight);
     312        $this->SetDensity(10);  // Slightly larger default
    313313    }
    314314
    315315    function SetHorizon($aHorizon) {
    316         $this->alpha=$aHorizon;
    317     }
    318        
    319     function DoPattern($aImg) {
    320         // "Fake" a nice 3D grid-effect.
    321         $x0 = $this->rect->x + $this->rect->w/2;
    322         $y0 = $this->rect->y;
    323         $x1 = $x0;
    324         $y1 = $this->rect->ye;
    325         $x0_right = $x0;
    326         $x1_right = $x1;
    327 
    328         // BTW "apa" means monkey in Swedish but is really a shortform for
    329         // "alpha+a" which was the labels I used on paper when I derived the
    330         // geometric to get the 3D perspective right.
    331         // $apa is the height of the bounding rectangle plus the distance to the
    332         // artifical horizon (alpha)
    333         $apa = $this->rect->h + $this->alpha;
    334 
    335         // Three cases and three loops
    336         // 1) The endpoint of the line ends on the bottom line
    337         // 2) The endpoint ends on the side
    338         // 3) Horizontal lines
    339 
    340         // Endpoint falls on bottom line
    341         $middle=$this->rect->x + $this->rect->w/2;
    342         $dist=$this->linespacing;
    343         $factor=$this->alpha /($apa);
    344         while($x1>$this->rect->x) {
    345             $aImg->Line($x0,$y0,$x1,$y1);
    346             $aImg->Line($x0_right,$y0,$x1_right,$y1);
    347             $x1 = $middle - $dist;
    348             $x0 = $middle - $dist * $factor;
    349             $x1_right = $middle + $dist;
    350             $x0_right =  $middle + $dist * $factor;
    351             $dist += $this->linespacing;
    352         }
    353 
    354         // Endpoint falls on sides
    355         $dist -= $this->linespacing;
    356         $d=$this->rect->w/2;
    357         $c = $apa - $d*$apa/$dist;
    358         while( $x0>$this->rect->x ) {
    359             $aImg->Line($x0,$y0,$this->rect->x,$this->rect->ye-$c);
    360             $aImg->Line($x0_right,$y0,$this->rect->xe,$this->rect->ye-$c);
    361             $dist += $this->linespacing;                       
    362             $x0 = $middle - $dist * $factor;
    363             $x1 = $middle - $dist;
    364             $x0_right =  $middle + $dist * $factor;                     
    365             $c = $apa - $d*$apa/$dist;
    366         }               
    367                
    368         // Horizontal lines
    369         // They need some serious consideration since they are a function
    370         // of perspective depth (alpha) and density (linespacing)
    371         $x0=$this->rect->x;
    372         $x1=$this->rect->xe;
    373         $y=$this->rect->ye;
    374                
    375         // The first line is drawn directly. Makes the loop below slightly
    376         // more readable.
    377         $aImg->Line($x0,$y,$x1,$y);
    378         $hls = $this->linespacing;
    379                
    380         // A correction factor for vertical "brick" line spacing to account for
    381         // a) the difference in number of pixels hor vs vert
    382         // b) visual apperance to make the first layer of "bricks" look more
    383         // square.
    384         $vls = $this->linespacing*0.6;
    385                
    386         $ds = $hls*($apa-$vls)/$apa;
    387         // Get the slope for the "perspective line" going from bottom right
    388         // corner to top left corner of the "first" brick.
    389                
    390         // Uncomment the following lines if you want to get a visual understanding
    391         // of what this helpline does. BTW this mimics the way you would get the
    392         // perspective right when drawing on paper.
    393         /*
    394           $x0 = $middle;
    395           $y0 = $this->rect->ye;
    396           $len=floor(($this->rect->ye-$this->rect->y)/$vls);
    397           $x1 = $middle+round($len*$ds);
    398           $y1 = $this->rect->ye-$len*$vls;
    399           $aImg->PushColor("red");
    400           $aImg->Line($x0,$y0,$x1,$y1);
    401           $aImg->PopColor();
    402         */
    403                
    404         $y -= $vls;             
    405         $k=($this->rect->ye-($this->rect->ye-$vls))/($middle-($middle-$ds));
    406         $dist = $hls;
    407         while( $y>$this->rect->y ) {
    408             $aImg->Line($this->rect->x,$y,$this->rect->xe,$y);
    409             $adj = $k*$dist/(1+$dist*$k/$apa);
    410             if( $adj < 2 ) $adj=1;
    411             $y = $this->rect->ye - round($adj);
    412             $dist += $hls;
    413         }
     316        $this->alpha=$aHorizon;
     317    }
     318
     319    function DoPattern($aImg) {
     320        // "Fake" a nice 3D grid-effect.
     321        $x0 = $this->rect->x + $this->rect->w/2;
     322        $y0 = $this->rect->y;
     323        $x1 = $x0;
     324        $y1 = $this->rect->ye;
     325        $x0_right = $x0;
     326        $x1_right = $x1;
     327
     328        // BTW "apa" means monkey in Swedish but is really a shortform for
     329        // "alpha+a" which was the labels I used on paper when I derived the
     330        // geometric to get the 3D perspective right.
     331        // $apa is the height of the bounding rectangle plus the distance to the
     332        // artifical horizon (alpha)
     333        $apa = $this->rect->h + $this->alpha;
     334
     335        // Three cases and three loops
     336        // 1) The endpoint of the line ends on the bottom line
     337        // 2) The endpoint ends on the side
     338        // 3) Horizontal lines
     339
     340        // Endpoint falls on bottom line
     341        $middle=$this->rect->x + $this->rect->w/2;
     342        $dist=$this->linespacing;
     343        $factor=$this->alpha /($apa);
     344        while($x1>$this->rect->x) {
     345            $aImg->Line($x0,$y0,$x1,$y1);
     346            $aImg->Line($x0_right,$y0,$x1_right,$y1);
     347            $x1 = $middle - $dist;
     348            $x0 = $middle - $dist * $factor;
     349            $x1_right = $middle + $dist;
     350            $x0_right =  $middle + $dist * $factor;
     351            $dist += $this->linespacing;
     352        }
     353
     354        // Endpoint falls on sides
     355        $dist -= $this->linespacing;
     356        $d=$this->rect->w/2;
     357        $c = $apa - $d*$apa/$dist;
     358        while( $x0>$this->rect->x ) {
     359            $aImg->Line($x0,$y0,$this->rect->x,$this->rect->ye-$c);
     360            $aImg->Line($x0_right,$y0,$this->rect->xe,$this->rect->ye-$c);
     361            $dist += $this->linespacing;
     362            $x0 = $middle - $dist * $factor;
     363            $x1 = $middle - $dist;
     364            $x0_right =  $middle + $dist * $factor;
     365            $c = $apa - $d*$apa/$dist;
     366        }
     367
     368        // Horizontal lines
     369        // They need some serious consideration since they are a function
     370        // of perspective depth (alpha) and density (linespacing)
     371        $x0=$this->rect->x;
     372        $x1=$this->rect->xe;
     373        $y=$this->rect->ye;
     374
     375        // The first line is drawn directly. Makes the loop below slightly
     376        // more readable.
     377        $aImg->Line($x0,$y,$x1,$y);
     378        $hls = $this->linespacing;
     379
     380        // A correction factor for vertical "brick" line spacing to account for
     381        // a) the difference in number of pixels hor vs vert
     382        // b) visual apperance to make the first layer of "bricks" look more
     383        // square.
     384        $vls = $this->linespacing*0.6;
     385
     386        $ds = $hls*($apa-$vls)/$apa;
     387        // Get the slope for the "perspective line" going from bottom right
     388        // corner to top left corner of the "first" brick.
     389
     390        // Uncomment the following lines if you want to get a visual understanding
     391        // of what this helpline does. BTW this mimics the way you would get the
     392        // perspective right when drawing on paper.
     393        /*
     394        $x0 = $middle;
     395        $y0 = $this->rect->ye;
     396        $len=floor(($this->rect->ye-$this->rect->y)/$vls);
     397        $x1 = $middle+round($len*$ds);
     398        $y1 = $this->rect->ye-$len*$vls;
     399        $aImg->PushColor("red");
     400        $aImg->Line($x0,$y0,$x1,$y1);
     401        $aImg->PopColor();
     402        */
     403
     404        $y -= $vls;
     405        $k=($this->rect->ye-($this->rect->ye-$vls))/($middle-($middle-$ds));
     406        $dist = $hls;
     407        while( $y>$this->rect->y ) {
     408            $aImg->Line($this->rect->x,$y,$this->rect->xe,$y);
     409            $adj = $k*$dist/(1+$dist*$k/$apa);
     410            if( $adj < 2 ) $adj=1;
     411            $y = $this->rect->ye - round($adj);
     412            $dist += $hls;
     413        }
    414414    }
    415415}
     
    422422    private $vert=null;
    423423    private $hor=null;
    424     function RectPatternCross($aColor="black",$aWeight=1) {
    425         parent::RectPattern($aColor,$aWeight);
    426         $this->vert = new RectPatternVert($aColor,$aWeight);
    427         $this->hor  = new RectPatternHor($aColor,$aWeight);
     424    function __construct($aColor="black",$aWeight=1) {
     425        parent::__construct($aColor,$aWeight);
     426        $this->vert = new RectPatternVert($aColor,$aWeight);
     427        $this->hor  = new RectPatternHor($aColor,$aWeight);
    428428    }
    429429
    430430    function SetOrder($aDepth) {
    431         $this->vert->SetOrder($aDepth);
    432         $this->hor->SetOrder($aDepth);
     431        $this->vert->SetOrder($aDepth);
     432        $this->hor->SetOrder($aDepth);
    433433    }
    434434
    435435    function SetPos($aRect) {
    436         parent::SetPos($aRect);
    437         $this->vert->SetPos($aRect);
    438         $this->hor->SetPos($aRect);
     436        parent::SetPos($aRect);
     437        $this->vert->SetPos($aRect);
     438        $this->hor->SetPos($aRect);
    439439    }
    440440
    441441    function SetDensity($aDens) {
    442         $this->vert->SetDensity($aDens);
    443         $this->hor->SetDensity($aDens);
    444     }
    445 
    446     function DoPattern($aImg) {
    447         $this->vert->DoPattern($aImg);
    448         $this->hor->DoPattern($aImg);
     442        $this->vert->SetDensity($aDens);
     443        $this->hor->SetDensity($aDens);
     444    }
     445
     446    function DoPattern($aImg) {
     447        $this->vert->DoPattern($aImg);
     448        $this->hor->DoPattern($aImg);
    449449    }
    450450}
     
    458458    private $left=null;
    459459    private $right=null;
    460     function RectPatternDiagCross($aColor="black",$aWeight=1) {
    461         parent::RectPattern($aColor,$aWeight);
    462         $this->right = new RectPatternRDiag($aColor,$aWeight);
    463         $this->left  = new RectPatternLDiag($aColor,$aWeight);
     460    function __construct($aColor="black",$aWeight=1) {
     461        parent::__construct($aColor,$aWeight);
     462        $this->right = new RectPatternRDiag($aColor,$aWeight);
     463        $this->left  = new RectPatternLDiag($aColor,$aWeight);
    464464    }
    465465
    466466    function SetOrder($aDepth) {
    467         $this->left->SetOrder($aDepth);
    468         $this->right->SetOrder($aDepth);
     467        $this->left->SetOrder($aDepth);
     468        $this->right->SetOrder($aDepth);
    469469    }
    470470
    471471    function SetPos($aRect) {
    472         parent::SetPos($aRect);
    473         $this->left->SetPos($aRect);
    474         $this->right->SetPos($aRect);
     472        parent::SetPos($aRect);
     473        $this->left->SetPos($aRect);
     474        $this->right->SetPos($aRect);
    475475    }
    476476
    477477    function SetDensity($aDens) {
    478         $this->left->SetDensity($aDens);
    479         $this->right->SetDensity($aDens);
    480     }
    481 
    482     function DoPattern($aImg) {
    483         $this->left->DoPattern($aImg);
    484         $this->right->DoPattern($aImg);
     478        $this->left->SetDensity($aDens);
     479        $this->right->SetDensity($aDens);
     480    }
     481
     482    function DoPattern($aImg) {
     483        $this->left->DoPattern($aImg);
     484        $this->right->DoPattern($aImg);
    485485    }
    486486
     
    489489//=====================================================================
    490490// Class RectPatternFactory
    491 // Factory class for rectangular pattern 
     491// Factory class for rectangular pattern
    492492//=====================================================================
    493493class RectPatternFactory {
    494     function RectPatternFactory() {
    495         // Empty
     494    function __construct() {
     495        // Empty
    496496    }
    497497    function Create($aPattern,$aColor,$aWeight=1) {
    498         switch($aPattern) {
    499             case BAND_RDIAG:
    500                 $obj =  new RectPatternRDiag($aColor,$aWeight);
    501                 break;
    502             case BAND_LDIAG:
    503                 $obj =  new RectPatternLDiag($aColor,$aWeight);
    504                 break;
    505             case BAND_SOLID:
    506                 $obj =  new RectPatternSolid($aColor,$aWeight);
    507                 break;
    508             case BAND_VLINE:
    509                 $obj =  new RectPatternVert($aColor,$aWeight);
    510                 break;
    511             case BAND_HLINE:
    512                 $obj =  new RectPatternHor($aColor,$aWeight);
    513                 break;
    514             case BAND_3DPLANE:
    515                 $obj =  new RectPattern3DPlane($aColor,$aWeight);
    516                 break;
    517             case BAND_HVCROSS:
    518                 $obj =  new RectPatternCross($aColor,$aWeight);
    519                 break;
    520             case BAND_DIAGCROSS:
    521                 $obj =  new RectPatternDiagCross($aColor,$aWeight);
    522                 break;
    523             default:
    524                 JpGraphError::RaiseL(16003,$aPattern);
    525 //(" Unknown pattern specification ($aPattern)");
    526         }
    527         return $obj;
     498        switch($aPattern) {
     499            case BAND_RDIAG:
     500                $obj =  new RectPatternRDiag($aColor,$aWeight);
     501                break;
     502            case BAND_LDIAG:
     503                $obj =  new RectPatternLDiag($aColor,$aWeight);
     504                break;
     505            case BAND_SOLID:
     506                $obj =  new RectPatternSolid($aColor,$aWeight);
     507                break;
     508            case BAND_VLINE:
     509                $obj =  new RectPatternVert($aColor,$aWeight);
     510                break;
     511            case BAND_HLINE:
     512                $obj =  new RectPatternHor($aColor,$aWeight);
     513                break;
     514            case BAND_3DPLANE:
     515                $obj =  new RectPattern3DPlane($aColor,$aWeight);
     516                break;
     517            case BAND_HVCROSS:
     518                $obj =  new RectPatternCross($aColor,$aWeight);
     519                break;
     520            case BAND_DIAGCROSS:
     521                $obj =  new RectPatternDiagCross($aColor,$aWeight);
     522                break;
     523            default:
     524                JpGraphError::RaiseL(16003,$aPattern);
     525                //(" Unknown pattern specification ($aPattern)");
     526        }
     527        return $obj;
    528528    }
    529529}
     
    541541    private $dir, $min, $max;
    542542
    543     function PlotBand($aDir,$aPattern,$aMin,$aMax,$aColor="black",$aWeight=1,$aDepth=DEPTH_BACK) {
    544         $f =  new RectPatternFactory();
    545         $this->prect = $f->Create($aPattern,$aColor,$aWeight);
    546         if( is_numeric($aMin) && is_numeric($aMax) && ($aMin > $aMax) )
    547             JpGraphError::RaiseL(16004);
    548 //('Min value for plotband is larger than specified max value. Please correct.');
    549         $this->dir = $aDir;
    550         $this->min = $aMin;
    551         $this->max = $aMax;
    552         $this->depth=$aDepth;
    553     }
    554        
     543    function __construct($aDir,$aPattern,$aMin,$aMax,$aColor="black",$aWeight=1,$aDepth=DEPTH_BACK) {
     544        $f =  new RectPatternFactory();
     545        $this->prect = $f->Create($aPattern,$aColor,$aWeight);
     546        if( is_numeric($aMin) && is_numeric($aMax) && ($aMin > $aMax) )
     547        JpGraphError::RaiseL(16004);
     548        //('Min value for plotband is larger than specified max value. Please correct.');
     549        $this->dir = $aDir;
     550        $this->min = $aMin;
     551        $this->max = $aMax;
     552        $this->depth=$aDepth;
     553    }
     554
    555555    // Set position. aRect contains absolute image coordinates
    556556    function SetPos($aRect) {
    557         assert( $this->prect != null ) ;
    558         $this->prect->SetPos($aRect);
    559     }
    560        
     557        assert( $this->prect != null ) ;
     558        $this->prect->SetPos($aRect);
     559    }
     560
    561561    function ShowFrame($aFlag=true) {
    562         $this->prect->ShowFrame($aFlag);
     562        $this->prect->ShowFrame($aFlag);
    563563    }
    564564
    565565    // Set z-order. In front of pplot or in the back
    566566    function SetOrder($aDepth) {
    567         $this->depth=$aDepth;
    568     }
    569        
     567        $this->depth=$aDepth;
     568    }
     569
    570570    function SetDensity($aDens) {
    571         $this->prect->SetDensity($aDens);
    572     }
    573        
     571        $this->prect->SetDensity($aDens);
     572    }
     573
    574574    function GetDir() {
    575         return $this->dir;
    576     }
    577        
     575        return $this->dir;
     576    }
     577
    578578    function GetMin() {
    579         return $this->min;
    580     }
    581        
     579        return $this->min;
     580    }
     581
    582582    function GetMax() {
    583         return $this->max;
     583        return $this->max;
    584584    }
    585585
    586586    function PreStrokeAdjust($aGraph) {
    587         // Nothing to do
    588     }
    589        
     587        // Nothing to do
     588    }
     589
    590590    // Display band
    591591    function Stroke($aImg,$aXScale,$aYScale) {
    592         assert( $this->prect != null ) ;
    593         if( $this->dir == HORIZONTAL ) {
    594             if( $this->min === 'min' ) $this->min = $aYScale->GetMinVal();
    595             if( $this->max === 'max' ) $this->max = $aYScale->GetMaxVal();
     592        assert( $this->prect != null ) ;
     593        if( $this->dir == HORIZONTAL ) {
     594            if( $this->min === 'min' ) $this->min = $aYScale->GetMinVal();
     595            if( $this->max === 'max' ) $this->max = $aYScale->GetMaxVal();
    596596
    597597            // Only draw the bar if it actually appears in the range
    598598            if ($this->min < $aYScale->GetMaxVal() && $this->max > $aYScale->GetMinVal()) {
    599            
    600             // Trucate to limit of axis
    601             $this->min = max($this->min, $aYScale->GetMinVal());
    602             $this->max = min($this->max, $aYScale->GetMaxVal());
    603 
    604             $x=$aXScale->scale_abs[0];
    605             $y=$aYScale->Translate($this->max);
    606             $width=$aXScale->scale_abs[1]-$aXScale->scale_abs[0]+1;
    607             $height=abs($y-$aYScale->Translate($this->min))+1;
    608             $this->prect->SetPos(new Rectangle($x,$y,$width,$height));
    609             $this->prect->Stroke($aImg);
     599                
     600                // Trucate to limit of axis
     601                $this->min = max($this->min, $aYScale->GetMinVal());
     602                $this->max = min($this->max, $aYScale->GetMaxVal());
     603
     604                $x=$aXScale->scale_abs[0];
     605                $y=$aYScale->Translate($this->max);
     606                $width=$aXScale->scale_abs[1]-$aXScale->scale_abs[0]+1;
     607                $height=abs($y-$aYScale->Translate($this->min))+1;
     608                $this->prect->SetPos(new Rectangle($x,$y,$width,$height));
     609                $this->prect->Stroke($aImg);
    610610            }
    611         }
    612         else {  // VERTICAL
    613             if( $this->min === 'min' ) $this->min = $aXScale->GetMinVal();
    614             if( $this->max === 'max' ) $this->max = $aXScale->GetMaxVal();
    615            
     611        }
     612        else { // VERTICAL
     613            if( $this->min === 'min' ) $this->min = $aXScale->GetMinVal();
     614            if( $this->max === 'max' ) $this->max = $aXScale->GetMaxVal();
     615
    616616            // Only draw the bar if it actually appears in the range
    617             if ($this->min < $aXScale->GetMaxVal() && $this->max > $aXScale->GetMinVal()) {
    618            
    619             // Trucate to limit of axis
    620             $this->min = max($this->min, $aXScale->GetMinVal());
    621             $this->max = min($this->max, $aXScale->GetMaxVal());
    622 
    623             $y=$aYScale->scale_abs[1];
    624             $x=$aXScale->Translate($this->min);
    625             $height=abs($aYScale->scale_abs[1]-$aYScale->scale_abs[0]);
    626             $width=abs($x-$aXScale->Translate($this->max));
    627             $this->prect->SetPos(new Rectangle($x,$y,$width,$height));
    628             $this->prect->Stroke($aImg);
     617            if ($this->min < $aXScale->GetMaxVal() && $this->max > $aXScale->GetMinVal()) {
     618                
     619                // Trucate to limit of axis
     620                $this->min = max($this->min, $aXScale->GetMinVal());
     621                $this->max = min($this->max, $aXScale->GetMaxVal());
     622
     623                $y=$aYScale->scale_abs[1];
     624                $x=$aXScale->Translate($this->min);
     625                $height=abs($aYScale->scale_abs[1]-$aYScale->scale_abs[0]);
     626                $width=abs($x-$aXScale->Translate($this->max));
     627                $this->prect->SetPos(new Rectangle($x,$y,$width,$height));
     628                $this->prect->Stroke($aImg);
    629629            }
    630         }
     630        }
    631631    }
    632632}
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