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00001 00002 // 00003 // Thor C++ Library 00004 // Copyright (c) 2011-2015 Jan Haller 00005 // 00006 // This software is provided 'as-is', without any express or implied 00007 // warranty. In no event will the authors be held liable for any damages 00008 // arising from the use of this software. 00009 // 00010 // Permission is granted to anyone to use this software for any purpose, 00011 // including commercial applications, and to alter it and redistribute it 00012 // freely, subject to the following restrictions: 00013 // 00014 // 1. The origin of this software must not be misrepresented; you must not 00015 // claim that you wrote the original software. If you use this software 00016 // in a product, an acknowledgment in the product documentation would be 00017 // appreciated but is not required. 00018 // 00019 // 2. Altered source versions must be plainly marked as such, and must not be 00020 // misrepresented as being the original software. 00021 // 00022 // 3. This notice may not be removed or altered from any source distribution. 00023 // 00025 00028 00029 #ifndef THOR_FADEANIMATION_HPP 00030 #define THOR_FADEANIMATION_HPP 00031 00032 #include <Thor/Config.hpp> 00033 #include <Thor/Graphics/UniformAccess.hpp> 00034 00035 00036 namespace thor 00037 { 00038 00041 00044 class THOR_API FadeAnimation 00045 { 00046 // --------------------------------------------------------------------------------------------------------------------------- 00047 // Public member functions 00048 public: 00054 FadeAnimation(float inRatio, float outRatio); 00055 00060 template <class Animated> 00061 void operator() (Animated& animated, float progress) const; 00062 00063 00064 // --------------------------------------------------------------------------------------------------------------------------- 00065 // Private variables 00066 private: 00067 float mInRatio; 00068 float mOutRatio; 00069 }; 00070 00072 00073 // --------------------------------------------------------------------------------------------------------------------------- 00074 00075 00076 template <class Animated> 00077 void FadeAnimation::operator() (Animated& target, float progress) const 00078 { 00079 if (progress < mInRatio) 00080 setAlpha(target, static_cast<sf::Uint8>(256 * progress / mInRatio)); 00081 else if (progress > 1.f - mOutRatio) 00082 setAlpha(target, static_cast<sf::Uint8>(256 * (1.f-progress) / mOutRatio)); 00083 } 00084 00085 } // namespace thor 00086 00087 #endif // THOR_FADEANIMATION_HPP