/** * @file llcriticaldamp.h * @brief A lightweight class that calculates critical damping constants once * per frame. * * $LicenseInfo:firstyear=2002&license=viewergpl$ * * Copyright (c) 2002-2009, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at * http://secondlifegrid.net/programs/open_source/licensing/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #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