1// SuperTux - Pulsing Light
2// Copyright (C) 2006 Christoph Sommer <christoph.sommer@2006.expires.deltadevelopment.de>
3//
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.
8//
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.
13//
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/>.
16
17#ifndef HEADER_SUPERTUX_OBJECT_PULSING_LIGHT_HPP
18#define HEADER_SUPERTUX_OBJECT_PULSING_LIGHT_HPP
19
20#include "object/light.hpp"
21
22/**
23 * Light source that changes alpha value to give the impression of a pulsating light
24 */
25class PulsingLight final : public Light
26{
27public:
28 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));
29 virtual ~PulsingLight();
30
31 virtual void update(float dt_sec) override;
32 virtual void draw(DrawingContext& context) override;
33
34protected:
35 float min_alpha; /**< minimum alpha */
36 float max_alpha; /**< maximum alpha */
37 float cycle_len; /**< length in seconds of one cycle */
38
39 float t; /**< local time in seconds */
40};
41
42#endif
43
44/* EOF */
45