[php] Aiuto disegno immagini

[TRAX3D]

Salve,
mi piacerebbe che qualche esperto mi aiutasse in questo dilemma
ho un file php che mi crea un immagine nell'esempio sotto un asterisco bianco ed uno rosso:

<?php
include 'config.php';
session_start();

//*****************************************************************************
//Asterisco Bianco
//*****************************************************************************
for ($i = 0; $i <='11'; $i++)
    {
    $TxtLayer = "LAYER1";
    $TmpX1 = '4';
    $TmpY1 = '4';
    $TmpX2 = $TmpX1 + ('5' * cos(pi()/6*$i));
    $TmpY2 = $TmpY1 + ('5' * sin(pi()/6*$i));
    $arryLinee[] = array($TmpX1, $TmpY1, $TmpX2, $TmpY2, $TxtLayer);      
    }
//*****************************************************************************
//Asterisco Rosso
//*****************************************************************************
for ($i = 0; $i <='11'; $i++)
    {
    $TxtLayer = "ASSE";
    $TmpX1 = '6';
    $TmpY1 = '6';
    $TmpX2 = $TmpX1 + ('5' * cos(pi()/6*$i));
    $TmpY2 = $TmpY1 + ('5' * sin(pi()/6*$i));
    //$arryLinee[] = array($TmpX1, $TmpY1, $TmpX2, $TmpY2, $TxtLayer);      
    $arryLinee[] = array($TmpX2, $TmpY2, $TmpX1, $TmpY1, $TxtLayer);      
    }
//ECHO "<BR>";

//*****************************************************************************
//Calcolo dimensione e scala disegno
//*****************************************************************************

$minX = 0;
$minY = 0;
$MasX = 0;
$MasY = 0;
for ($i = 0; $i <= count($arryLinee)-1; $i++)
   {
   //$arryLinee[] = array($TmpX1, $TmpY1, $TmpX2, $TmpY2, $TxtLayer);
   //Ricerca minimo
   if ($arryLinee[$i][0] < $minX) $minX = $arryLinee[$i][0];
   if ($arryLinee[$i][1] < $minY) $minY = $arryLinee[$i][1];
   if ($arryLinee[$i][2] < $minX) $minX = $arryLinee[$i][2];
   if ($arryLinee[$i][3] < $minY) $minY = $arryLinee[$i][3];
   //Ricerca massimo
   if ($arryLinee[$i][0] > $MasX) $MasX = $arryLinee[$i][0] * 1.25;
   if ($arryLinee[$i][1] > $MasY) $MasY = $arryLinee[$i][1] * 1.25;
   if ($arryLinee[$i][2] > $MasX) $MasX = $arryLinee[$i][2] * 1.25;
   if ($arryLinee[$i][3] > $MasY) $MasY = $arryLinee[$i][3] * 1.25;
   }

//Calcolo dimensione immagine e fattore di scala
if (($MasX - $minX) > ($MasY - $minY))
    {
    $DimMAX = $MasX - $minX;
    $DimImg = 100;
    $Scala = $DimImg / $DimMAX * 5.333;
    }
else{
    $DimMAX = ($MasY - $minY);
    $DimImg = 140;
    $Scala = $DimImg / $DimMAX * 3;
    }

//*****************************************************************************
//Rapporto 16:9
//*****************************************************************************
$DimX = 5.333 * $DimImg;
$DimY = 3 * $DimImg;


//*****************************************************************************
//Creo immagine
//*****************************************************************************
$img = @imagecreatetruecolor($DimX, $DimY)
       or die("Cannot Initialize new GD image stream");

//*****************************************************************************
//Predispongo i colori
//*****************************************************************************
$white =   imagecolorallocate($img, 255, 255, 255);
$red =     imagecolorallocate($img, 255,   0,   0);
$grey90 =  imagecolorallocate($img,  25,  25,  25);

imagefill($img,0,0,$grey90); //Coloro lo sfondo immagine

//*****************************************************************************
//Disegno le linee
//*****************************************************************************
for ($i = 0; $i <= count($arryLinee)-1; $i++)
   {
   switch ($arryLinee[$i][4]) 
      {
      case "ASSE":
         $TmpLayer = $red; break;
      case "LAYER1":
         $TmpLayer = $white; break;
      }
   //bool imageline       (resource image, int x1, int y1, int x2, int y2, int color)
   //bool imagedashedline (resource image, int x1, int y1, int x2, int y2, int color)
   imageline($img, ($arryLinee[$i][0]*$Scala), $DimY-($arryLinee[$i][1]*$Scala),
                ($arryLinee[$i][2]*$Scala), $DimY-($arryLinee[$i][3]*$Scala), $TmpLayer);
   }

//*****************************************************************************
// output image in the browser
//*****************************************************************************
header("Content-type: image/png");
imagepng($img);

//*****************************************************************************
// free memory
//*****************************************************************************
imagedestroy($img);

?>

Il risultato di questo script è questo


ora se uslo il comando bool imagedashedline (resource image, int x1, int y1, int x2, int y2, int color) per le linee di colore rosso come il codice allegato

//*****************************************************************************
//Disegno le linee
//*****************************************************************************
for ($i = 0; $i <= count($arryLinee)-1; $i++)
   {
   switch ($arryLinee[$i][4]) 
      {
      case "ASSE":
         $TmpLayer = $red; break;
      case "LAYER1":
         $TmpLayer = $white; break;
      }
   //bool imageline       (resource image, int x1, int y1, int x2, int y2, int color)
   //bool imagedashedline (resource image, int x1, int y1, int x2, int y2, int color)
   if ($TmpLayer == $red)
      {
      imagedashedline($img, ($arryLinee[$i][0]*$Scala), $DimY-($arryLinee[$i][1]*$Scala),
                      ($arryLinee[$i][2]*$Scala), $DimY-($arryLinee[$i][3]*$Scala), $TmpLayer);
      }
   else
      {
      imageline($img, ($arryLinee[$i][0]*$Scala), $DimY-($arryLinee[$i][1]*$Scala),
                ($arryLinee[$i][2]*$Scala), $DimY-($arryLinee[$i][3]*$Scala), $TmpLayer);
      }
   }

//***************************************************************************** 

mi da come risultato questo :


come vedete alcune righe rosse ci sono e sono tratteggiate altre invece mancano del tutto

Qualcuno mi può dare una mano

Primo commento nel manuale

It doesn't work for horizontal lines. Use imagesetstyle()

[TRAX3D]

si ok ma di orizzontale ci sono solo due linee quelle a +30 e -30° non le fa lo stesso....

[dreadnaut]

La funzione è deprecata, e buggata da anni, almeno nove! Non l'hanno mai aggiustata

Come suggerito da altri, usa imagesetstyle() (vedi anche i commenti).