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Diffstat (limited to 'indra/llcommon/llcriticaldamp.h')
| -rwxr-xr-x[-rw-r--r--] | indra/llcommon/llcriticaldamp.h | 68 |
1 files changed, 41 insertions, 27 deletions
diff --git a/indra/llcommon/llcriticaldamp.h b/indra/llcommon/llcriticaldamp.h index 1ea5914b5b..1fb6a1af29 100644..100755 --- a/indra/llcommon/llcriticaldamp.h +++ b/indra/llcommon/llcriticaldamp.h @@ -3,57 +3,71 @@ * @brief A lightweight class that calculates critical damping constants once * per frame. * - * $LicenseInfo:firstyear=2002&license=viewergpl$ - * - * Copyright (c) 2002-2009, Linden Research, Inc. - * + * $LicenseInfo:firstyear=2002&license=viewerlgpl$ * 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 + * 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. * - * 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 + * 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. * - * 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. + * 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 * - * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO - * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, - * COMPLETENESS OR PERFORMANCE. + * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #ifndef LL_LLCRITICALDAMP_H #define LL_LLCRITICALDAMP_H -#include <map> +#include <vector> #include "llframetimer.h" +#include "llunits.h" -class LL_COMMON_API LLCriticalDamp +class LL_COMMON_API LLSmoothInterpolation { public: - LLCriticalDamp(); + LLSmoothInterpolation(); // MANIPULATORS static void updateInterpolants(); // ACCESSORS - static F32 getInterpolant(const F32 time_constant, BOOL use_cache = TRUE); + static F32 getInterpolant(F32SecondsImplicit time_constant, bool use_cache = true); -protected: + template<typename T> + static T lerp(T a, T b, F32SecondsImplicit time_constant, bool use_cache = true) + { + F32 interpolant = getInterpolant(time_constant, use_cache); + return ((a * (1.f - interpolant)) + + (b * interpolant)); + } + +protected: + static F32 calcInterpolant(F32 time_constant); + + struct CompareTimeConstants; static LLFrameTimer sInternalTimer; // frame timer for calculating deltas - static std::map<F32, F32> sInterpolants; + struct Interpolant + { + F32 mTimeScale; + F32 mInterpolant; + }; + typedef std::vector<Interpolant> interpolant_vec_t; + static interpolant_vec_t sInterpolants; static F32 sTimeDelta; }; +typedef LLSmoothInterpolation LLCriticalDamp; + #endif // LL_LLCRITICALDAMP_H |