1<?php
2
3/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
4
5/**
6 * 3d Library
7 *
8 * PHP versions 5
9 *
10 * LICENSE:
11 * This library is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU Lesser General Public
13 * License as published by the Free Software Foundation; either
14 * version 2.1 of the License, or (at your option) any later version.
15 *
16 * This library is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19 * Lesser General Public License for more details.
20 *
21 * You should have received a copy of the GNU Lesser General Public
22 * License along with this library; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
24 *
25 * @category  Image
26 * @package   Image_3D
27 * @author    Kore Nordmann <3d@kore-nordmann.de>
28 * @copyright 1997-2005 Kore Nordmann
29 * @license   http://www.gnu.org/licenses/lgpl.txt lgpl 2.1
30 * @version   CVS: $Id$
31 * @link      http://pear.php.net/package/PackageName
32 * @since     File available since Release 0.1.0
33 */
34
35
36/**
37 * Image_3D_Light
38 *
39 * @category  Image
40 * @package   Image_3D
41 * @author    Kore Nordmann <3d@kore-nordmann.de>
42 * @copyright 1997-2005 Kore Nordmann
43 * @license   http://www.gnu.org/licenses/lgpl.txt lgpl 2.1
44 * @version   Release: @package_version@
45 * @link      http://pear.php.net/package/PackageName
46 * @since     Class available since Release 0.1.0
47 */
48class Image_3D_Light extends Image_3D_Coordinate implements Image_3D_Interface_Paintable
49{
50
51    protected $_color;
52
53    public function __construct($x, $y, $z)
54    {
55        parent::__construct($x, $y, $z);
56        $this->_color = null;
57        $this->_position = null;
58    }
59
60    public function getPolygonCount()
61    {
62        return 0;
63    }
64
65    public function setColor(Image_3D_Color $color)
66    {
67        $this->_color = $color;
68    }
69
70    public function getRawColor()
71    {
72        return $this->_color;
73    }
74
75    public function setOption($option, $value)
76    {
77        $this->_option[$option] = $value;
78    }
79
80    public function getColor(Image_3D_Interface_Enlightenable $polygon)
81    {
82        $color = clone ($polygon->getColor());
83
84        // Create vector from polygons point to light source
85        $light = new Image_3D_Vector($this->_x, $this->_y, $this->_z);
86        $light->sub($polygon->getPosition());
87
88        // Create vector from polygons point to camera
89//        $camera = new Image_3D_Vector(0, 0, -100);
90//        $camera->sub($polygon->getPosition());
91
92        // Compare with polygones normale vector
93        $normale = $polygon->getNormale();
94        $angle = $normale->getAngle($light);
95
96        // Use angle as light intensity
97        $color->addLight($this->_color, $angle);
98        return $color;
99    }
100}
101
102?>
103