move($x, $y);
}
public function move($x, $y){
$this->x = $x;
$this->y = $y;
}
public abstract function generateDrawCode();
public function scale($factor){
$this->x = $this->x * $factor;
$this->y = $this->y * $factor;
}
}
class Circle extends DrawingObject {
protected $radius;
public function __construct($x, $y, $radius){
parent::__construct($x, $y);
$this->radius = $radius;
}
public function generateDrawCode(){
echo 'ctx.beginPath();';
echo 'ctx.arc('.$this->x.', '.$this->y.', '.$this->radius.', 0, Math.PI*2, true);';
echo 'ctx.closePath();';
echo 'ctx.stroke();';
}
public function scale($factor){
parent::scale($factor);
$this->radius = $this->radius * $factor;
}
}
class Rectangle extends DrawingObject {
protected $width;
protected $height;
public function __construct($x, $y, $width, $height){
parent::__construct($x, $y);
$this->width = $width;
$this->height = $height;
}
public function generateDrawCode(){
echo 'ctx.strokeRect('.$this->x.', '.$this->y.', '.$this->width.', '.$this->height.');';
}
public function scale($factor){
parent::scale($factor);
$this->width = $this->width * $factor;
$this->height = $this->height * $factor;
}
}
class Container extends DrawingObject {
protected $objects = array();
public function __construct($x, $y){
parent::__construct($x, $y);
}
public function add($object){
$this->objects[] = $object;
}
public function generateDrawCode(){
foreach ($this->objects as $object) {
$x = $object->x;
$y = $object->y;
$object->move($this->x + $x, $this->y + $y);
$object->generateDrawCode();
$object->move($x, $y);
}
}
public function scale($factor){
parent::scale($factor);
foreach ($this->objects as $object) {
$object->scale($factor);
}
}
}
$sun=new Circle(10,4,2);
$train=new Container(1,0);
$cabin=new Rectangle(0,6,3,3);
$body=new Rectangle(0,9,7,3);
$chimney=new Rectangle(5,7,1,2);
$wheel1=new Circle(2,12,1);
$wheel2=new Circle(5,12,1);
$train->add($cabin);
$train->add($body);
$train->add($chimney);
$train->add($wheel1);
$train->add($wheel2);
$drawingBoard = new Container(0, 0);
$drawingBoard->add($sun);
$drawingBoard->add($train);
?>
Canvas