60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
/**
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* @file llcriticaldamp.h
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* @brief A lightweight class that calculates critical damping constants once
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* per frame.
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*
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* $LicenseInfo:firstyear=2002&license=viewergpl$
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*
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* Copyright (c) 2002-2009, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at
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* http://secondlifegrid.net/programs/open_source/licensing/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#ifndef LL_LLCRITICALDAMP_H
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#define LL_LLCRITICALDAMP_H
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#include <map>
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#include "llframetimer.h"
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class LL_COMMON_API LLCriticalDamp
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{
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public:
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LLCriticalDamp();
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// MANIPULATORS
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static void updateInterpolants();
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// ACCESSORS
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static F32 getInterpolant(const F32 time_constant, BOOL use_cache = TRUE);
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protected:
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static LLFrameTimer sInternalTimer; // frame timer for calculating deltas
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static std::map<F32, F32> sInterpolants;
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static F32 sTimeDelta;
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};
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#endif // LL_LLCRITICALDAMP_H
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