Cube

Add-On Cube

Informations

Author:Luciano Salvino
License: FPDF

Description

You can create a cube and rotate it around the x, y, z axes using the following function:

Cube(float a, float b, float c, float scale, float alfax, float alfay, float alfaz)

where a, b and c are the cube dimensions; scale is the scaling factor; alfax, alfay and alfaz are the rotation angles.

Source

<?php

/***************************************************************************
 *                              cube.php
 *                            -------------------
 *   creado               : Viernes, 2 de Julio de 2004
 *   copyright            : (C) 2004 LUCIANO SALVINO
 *
 *   $Id: cube.php, v 1.3.1 02/07/2004 17:44:00 psotfx Exp $
 *
 ***************************************************************************/

require('fpdf.php');

class PDF_Cube extends FPDF
{

function Cube($a=10, $b=10, $c=10, $scale=1, $alfax=10, $alfay=10, $alfaz=10) {

    $x = ($this->w-$this->rMargin)/2-($a/2);
    $y = ($this->h-$this->tMargin)/2-($b/2);

    $cubo = array(
        array($x+$a, $y+$b, $c), 
        array($x+$a, $y+$b, -$c), 
        array($x-$a, $y+$b, -$c), 
        array($x-$a, $y+$b, $c), 
        array($x+$a, $y-$b, $c), 
        array($x+$a, $y-$b, -$c), 
        array($x-$a, $y-$b, -$c), 
        array($x-$a, $y-$b, $c)
    );

    $senx = sin($alfax*M_PI/180);
    $cosx = cos($alfax*M_PI/180);
    $seny = sin($alfay*M_PI/180);
    $cosy = cos($alfay*M_PI/180);
    $senz = sin($alfaz*M_PI/180);
    $cosz = cos($alfaz*M_PI/180);
    $a = $cosy*$cosz;
    $b = $cosy*$senz;
    $c = -$seny;
    $d = $senx*$seny*$cosz-$cosx*$senz;
    $e = $senx*$seny*$senz+$cosx*$cosz;
    $f = $senx*$cosy;
    $g = $cosx*$seny*$cosz+$senx*$senz;
    $h = $cosx*$seny*$senz-$senx*$cosz;
    $k = $cosx*$cosy;

    for ($i=0; $i<count($cubo); $i++) {
       $cubo[$i][0] = ($a*$cubo[$i][0]+$b*$cubo[$i][1]+$c*$cubo[$i][2])*$scale;
       $cubo[$i][1] = ($d*$cubo[$i][0]+$e*$cubo[$i][1]+$f*$cubo[$i][2])*$scale;
       $cubo[$i][2] = ($g*$cubo[$i][0]+$h*$cubo[$i][1]+$k*$cubo[$i][2])*$scale;
    }

    /*Tapa inferior*/
    $this->Line($cubo[0][0], $cubo[0][1], $cubo[1][0], $cubo[1][1]);
    $this->Line($cubo[1][0], $cubo[1][1], $cubo[2][0], $cubo[2][1]);
    $this->Line($cubo[2][0], $cubo[2][1], $cubo[3][0], $cubo[3][1]);
    $this->Line($cubo[3][0], $cubo[3][1], $cubo[0][0], $cubo[0][1]);

    /*Tapa superior*/
    $this->Line($cubo[4][0], $cubo[4][1], $cubo[5][0], $cubo[5][1]);
    $this->Line($cubo[5][0], $cubo[5][1], $cubo[6][0], $cubo[6][1]);
    $this->Line($cubo[6][0], $cubo[6][1], $cubo[7][0], $cubo[7][1]);
    $this->Line($cubo[7][0], $cubo[7][1], $cubo[4][0], $cubo[4][1]);

    /*Laterales*/
    $this->Line($cubo[0][0], $cubo[0][1], $cubo[4][0], $cubo[4][1]);
    $this->Line($cubo[1][0], $cubo[1][1], $cubo[5][0], $cubo[5][1]);
    $this->Line($cubo[2][0], $cubo[2][1], $cubo[6][0], $cubo[6][1]);
    $this->Line($cubo[3][0], $cubo[3][1], $cubo[7][0], $cubo[7][1]);

}

}
?>

Example

<?php
require('cube.php');

$a = 50;
$b = 50;
$c = 50;
$scale = .6;
$alfax = 20;
$alfay = 20;
$alfaz = 20;

$pdf = new PDF_Cube();
$pdf->AddPage();
$pdf->Cube($a, $b, $c, $scale, $alfax, $alfay, $alfaz);
$pdf->Output();
?>
View the result here.

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