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<?php
/**
* Copyright 2011, Alok Menghrajani. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of the author.
*/
abstract class Object {
protected $name;
protected $position;
protected $color;
public function __construct($name) {
$this->name = $name;
$this->position = new Vector(0, 0, 0);
$this->color = Color::$white;
}
public function getName() {
return $this->name;
}
public function setPosition(Vector $v) {
$this->position = $v;
return $this;
}
public function getPosition() {
return $this->position;
}
public function setColor(Color $c) {
$this->color = $c;
return $this;
}
public function getColor() {
return $this->color;
}
/**
* Calculates intersection between the Ray $r and this object.
*
* Returns null if the ray does not intersect the object. If it
* does, we return an array(
* 'd' => distance from ray's origin,
* 'p' => point of intersection (if $compute_point is true),
* 'n' => normal vector (if $compute_normal is true)
* )
*/
abstract function intersect(Ray $r, $compute_point, $compute_normal);
}