<?php class GraphicsEnvironment { public $width; public $height; public $gdo; public $colors = array(); public function __construct( $width, $height ) { $this->width = $width; $this->height = $height; $this->gdo = imagecreatetruecolor( $width, $height ); $this->addColor( "white", 255, 255, 255 ); imagefilledrectangle( $this->gdo, 0, 0, $width, $height, $this->getColor( "white" ) ); } public function width() { return $this->width; } public function height() { return $this->height; } public function addColor( $name, $r, $g, $b ) { $this->colors[ $name ] = imagecolorallocate( $this->gdo, $r, $g, $b ); } public function getGraphicObject() { return $this->gdo; } public function getColor( $name ) { return $this->colors[ $name ]; } public function saveAsPng( $filename ) { imagepng( $this->gdo, $filename ); } } abstract class GraphicsObject { abstract public function render( $ge ); abstract public function z(); } abstract class BoxObject extends GraphicsObject { protected $color; protected $sx; protected $sy; protected $ex; protected $ey; protected $z; public function __construct( $z, $color, $sx, $sy, $ex, $ey ) { $this->z = $z; $this->color = $color; $this->sx = $sx; $this->sy = $sy; $this->ex = $ex; $this->ey = $ey; } public function z() { return $this->z; } } class Line extends BoxObject { public function render( $ge ) { imageline( $ge->getGraphicObject(), $this->sx, $this->sy, $this->ex, $this->ey, $ge->getColor( $this->color ) ); } } class Rectangle extends BoxObject { public function render( $ge ) { imagefilledrectangle( $ge->getGraphicObject(), $this->sx, $this->sy, $this->ex, $this->ey, $ge->getColor( $this->color ) ); } } class Oval extends BoxObject { public function render( $ge ) { $w = $this->ex - $this->sx; $h = $this->ey - $this->sy; imagefilledellipse( $ge->getGraphicObject(), $this->sx + ( $w / 2 ), $this->sy + ( $h / 2 ), $w, $h, $ge->getColor( $this->color ) ); } } ?>