Skip to content
Find file
Fetching contributors…
Cannot retrieve contributors at this time
92 lines (75 sloc) 2.78 KB
<?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.
*/
class Camera {
protected $position;
protected $direction;
protected $angle;
protected $up;
protected $right;
public function __construct() {
$this->position = new Vector(0, 0, 0);
// Assume that up is always somewhere in the <0, 1, 0> <direction> plane
$this->up = new Vector(0, 1, 0);
$this->angle = 30 / 180 * M_PI;
}
public function getDirection() {
return $this->direction;
}
public function getAngle() {
return $this->angle;
}
public function getRight() {
return $this->right;
}
public function getUp() {
return $this->up;
}
public function setPosition(Vector $v) {
$this->position = $v;
return $this;
}
public function getPosition() {
return $this->position;
}
public function setLookAt(Vector $v) {
// Compute direction (<look at> - <position>)
$this->direction = clone $v;
$this->direction->V_sub($this->position);
my_assert(!$this->direction->isNull(), 'look at == position');
// Normalize
$this->direction->normalize();
// Compute <right>
$this->right = clone $this->up;
$this->right->V_cross($this->direction);
// Compute the real <up>
$this->up = clone $this->direction;
$this->up->V_cross($this->right);
return $this;
}
}
Something went wrong with that request. Please try again.