<?php
set_time_limit(0);

function randChar($nombre = 6)
{
	return substr(str_shuffle("ABCDEFGHIJKLMNPQRSTUVWXYZ0123456789"), 0, $nombre);
}

// Configuration
define('DISPLAY', true);
define('FILE_OUTPUT', 'Image.png');

define('DISPLAY_REPERE', false);

// Lettre
define('KEY_LENGHT', 4);
define('PATH_LETTRE', 'lettre/');

define('MIN_COLOR_LETTRE', 100);
define('MIN_COLOR_LETTRE_TOTAL_MINIMUM', 200);

define('ROTATION_VARIATION_MAX', 30);

define('ROTATION_VARIATION_MAX_X', 50);
define('ROTATION_VARIATION_MAX_Y', 50);
define('ROTATION_VARIATION_MAX_Z', 30);

define('MIN_TAILLE_LETTRE', 50);
define('MAX_TAILLE_LETTRE', 80);

define('MIN_DEPLACEMENT_VERTICAL', -2);
define('MAX_DEPLACEMENT_VERTICAL', 6);

// Fond
define('ACTIVE_FOND', false);

if(ACTIVE_FOND)
{
	define('LIGNE_NUMBER', 20);
	define('CUBE_NUMBER', mt_rand(1,5));
	define('SPHERE_NUMBER', mt_rand(1,5));
}
else
{
	define('LIGNE_NUMBER', 0);
	define('CUBE_NUMBER', 0);
	define('SPHERE_NUMBER', 0);
}

// Ligne
define('LIGNE_BORDER_Y', 200); // max & min
define('LIGNE_MIN_COLOR', 100);

// Cube
define('CUBE_SIZE_MIN', 5);
define('CUBE_SIZE_MAX', 20);
define('CUBE_MIN_COLOR', 100);
define('CUBE_ROTATION_MAX', 180);
define('CUBE_BORDER_X', 120);
define('CUBE_BORDER_Y', 50);
define('CUBE_Z', 10);

// Sphere
define('SPHERE_DETAIL', 5);
define('SPHERE_MIN_RADIUS', 1);
define('SPHERE_MAX_RADIUS', 10);
define('SPHERE_MIN_COLOR', 100);
define('SPHERE_BORDER_X', 120);
define('SPHERE_BORDER_Y', 50);
define('SPHERE_Z', 10);

$keyRendered = randChar(KEY_LENGHT);

// Librairie 3D
include('Image/3D.php');

// Création de l'image
$world = new Image_3D();
$world->setColor(new Image_3D_Color(10, 10, 10));

// Ligne de fond
function createLigne($y1, $y2, $color)
{
	global $world;
	
	$ligne = $world->createObject('Polygon', array(
	new Image_3D_Point(-400,$y1,0),
	new Image_3D_Point(400,$y2,0),
	new Image_3D_Point(400,$y2+1,0),
	new Image_3D_Point(-400,$y1+1,0),
	));
	$ligne->setColor($color); 
}

for($i = 0; $i < LIGNE_NUMBER; $i++)
{
	createLigne(mt_rand(-LIGNE_BORDER_Y,LIGNE_BORDER_Y), mt_rand(-LIGNE_BORDER_Y,LIGNE_BORDER_Y), new Image_3D_Color(mt_rand(LIGNE_MIN_COLOR,255), mt_rand(LIGNE_MIN_COLOR,255), mt_rand(LIGNE_MIN_COLOR,255)));
}
	
	
// Cube de Fond
for($i = 0; $i < CUBE_NUMBER; $i++)
{
	$size = mt_rand(CUBE_SIZE_MIN, CUBE_SIZE_MAX);
	$cube = $world->createObject('cube', array($size, $size, $size));
	$cube->setColor(new Image_3D_Color(mt_rand(CUBE_MIN_COLOR,255), mt_rand(CUBE_MIN_COLOR,255), mt_rand(CUBE_MIN_COLOR,255))); 
	$cube->transform($world->createMatrix('Rotation', array(mt_rand(0,CUBE_ROTATION_MAX), mt_rand(0,CUBE_ROTATION_MAX), mt_rand(0,CUBE_ROTATION_MAX))));
	$cube->transform($world->createMatrix('Move', array(mt_rand(-CUBE_BORDER_X,CUBE_BORDER_X), mt_rand(-CUBE_BORDER_Y,CUBE_BORDER_Y), CUBE_Z)));
}

// Sphere
for($i = 0; $i < SPHERE_NUMBER; $i++)
{
	$sphere = $world->createObject('Sphere', array('r' => mt_rand(SPHERE_MIN_RADIUS, SPHERE_MAX_RADIUS) , 'detail' => SPHERE_DETAIL));
	$sphere->setColor(new Image_3D_Color(mt_rand(SPHERE_MIN_COLOR,255), mt_rand(SPHERE_MIN_COLOR,255), mt_rand(SPHERE_MIN_COLOR,255))); 
	$sphere->transform($world->createMatrix('Move', array(mt_rand(-SPHERE_BORDER_X,CUBE_BORDER_X), mt_rand(-SPHERE_BORDER_Y,SPHERE_BORDER_Y), SPHERE_Z)));
}

// Lettre
for($i = 0; $i < KEY_LENGHT; $i++)
{
	$text = $world->createObject('3ds', PATH_LETTRE . $keyRendered{$i} .'.3ds');

	$color = array(mt_rand(MIN_COLOR_LETTRE, 255), mt_rand(MIN_COLOR_LETTRE, 255), mt_rand(MIN_COLOR_LETTRE, 255));
	
	if($color[0] < MIN_COLOR_LETTRE_TOTAL_MINIMUM && $color[1] < MIN_COLOR_LETTRE_TOTAL_MINIMUM && $color[2] < MIN_COLOR_LETTRE_TOTAL_MINIMUM)
		$color[mt_rand(0,2)] = mt_rand(MIN_COLOR_LETTRE_TOTAL_MINIMUM, 255);
	
	// Position de la lettre en x
	$x = $i - 1.5;
	
	// Calcul pour que, apres la rotation selon Z, la lettre soit a sa position initial dans son repere ( X=0, Y=0 )
	$angle_z = mt_rand(-ROTATION_VARIATION_MAX_Z, ROTATION_VARIATION_MAX_Z);
	$deplacement_y = round(sin(deg2rad((float)$angle_z))*$x, 1);
	
	$deplacement_x = round((1.0-cos(deg2rad((float)$angle_z)))*$x, 1);
	
	// Deplacement Horizontal
	$deplacement_y -= mt_rand(MIN_DEPLACEMENT_VERTICAL, MAX_DEPLACEMENT_VERTICAL)/10;	
	
	
	$text->transform($world->createMatrix('Move', array($x - $deplacement_x, $deplacement_y, 0)));
	
	
	// Transformation : on tourne la lettre aléatoirement
	$text->transform($world->createMatrix('Rotation', array(180, 0, 0)));
	$text->transform($world->createMatrix('Rotation', array(mt_rand(-ROTATION_VARIATION_MAX_X,ROTATION_VARIATION_MAX_X), mt_rand(-ROTATION_VARIATION_MAX_Y, ROTATION_VARIATION_MAX_Y), $angle_z)));
	
	// Taille aléatoire aussi
	$scale = mt_rand(MIN_TAILLE_LETTRE, MAX_TAILLE_LETTRE);
	$text->transform($world->createMatrix('Scale', array($scale, $scale, $scale)));
	
	// Dans une couleur aussi aléatoire
	$text->setColor(new Image_3D_Color($color[0], $color[1], $color[2])); 

	// Image /!\ Fait a la va vite..pas cherché à comprendre le fonctionnement /!\
	$light1 = $world->createLight('Light', array(200,200,200));
	$light1->setColor(new Image_3D_Color(255, 255, 255));
}

if(DISPLAY_REPERE) // Debugage : Affichage du repere
{
	// Y = rouge
	$cube = $world->createObject('cube', array(2, 500, 2));
	$cube->setColor(new Image_3D_Color(255, 0, 0)); 
	// X = bleu
	$cube = $world->createObject('cube', array(500, 2, 2));
	$cube->setColor(new Image_3D_Color(0, 0, 255)); 
	// Z = vert
	$cube = $world->createObject('cube', array(2, 2, 500));
	$cube->setColor(new Image_3D_Color(0, 255, 0)); 	
}

$world->setOption(Image_3D::IMAGE_3D_OPTION_BF_CULLING, true);
$world->setOption(Image_3D::IMAGE_3D_OPTION_FILLED, true);

// rendu
$world->createRenderer('perspectively');
$world->createDriver('GD');
$world->render(300, 100, FILE_OUTPUT);

// affichage
if(DISPLAY)
{
	header("Content-type: image/bmp");
	readfile(FILE_OUTPUT);
}

?>