3 // SuperTux - Pulsing Light
4 // Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 #ifndef __PULSING_LIGHT_HPP__
21 #define __PULSING_LIGHT_HPP__
24 #include "game_object.hpp"
25 #include "lisp/lisp.hpp"
26 #include "math/vector.hpp"
27 #include "video/color.hpp"
32 * Light source that changes alpha value to give the impression of a pulsating light
34 class PulsingLight : public Light
37 PulsingLight(const Vector& center, float cycle_len = 5.0, float min_alpha = 0.0, float max_alpha = 1.0, const Color& color = Color(1.0, 1.0, 1.0, 1.0));
38 virtual ~PulsingLight();
40 void update(float elapsed_time);
41 void draw(DrawingContext& context);
44 float min_alpha; /**< minimum alpha */
45 float max_alpha; /**< maximum alpha */
46 float cycle_len; /**< length in seconds of one cycle */
48 float t; /**< local time in seconds */