/** * @file llcriticaldamp.h * @brief A lightweight class that calculates critical damping constants once * per frame. * * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #ifndef LL_LLCRITICALDAMP_H #define LL_LLCRITICALDAMP_H #include <map> #include "llframetimer.h" class LL_COMMON_API LLCriticalDamp { public: LLCriticalDamp(); // MANIPULATORS static void updateInterpolants(); // ACCESSORS static F32 getInterpolant(const F32 time_constant, BOOL use_cache = TRUE); protected: static LLFrameTimer sInternalTimer; // frame timer for calculating deltas static std::map<F32, F32> sInterpolants; static F32 sTimeDelta; }; #endif // LL_LLCRITICALDAMP_H