1 // SuperTux - Pulsing Light
2 // Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
17 #ifndef HEADER_SUPERTUX_OBJECT_PULSING_LIGHT_HPP
18 #define HEADER_SUPERTUX_OBJECT_PULSING_LIGHT_HPP
20 #include "object/light.hpp"
25 * Light source that changes alpha value to give the impression of a pulsating light
27 class PulsingLight : public Light
30 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));
31 virtual ~PulsingLight();
33 void update(float elapsed_time);
34 void draw(DrawingContext& context);
37 float min_alpha; /**< minimum alpha */
38 float max_alpha; /**< maximum alpha */
39 float cycle_len; /**< length in seconds of one cycle */
41 float t; /**< local time in seconds */