73 lines
2.6 KiB
C++
73 lines
2.6 KiB
C++
/**
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* @file llcriticaldamp.cpp
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* @brief Implementation of the critical damping functionality.
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*
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* $LicenseInfo:firstyear=2002&license=viewerlgpl$
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* Second Life Viewer Source Code
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* Copyright (C) 2010, Linden Research, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License only.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llcriticaldamp.h"
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//-----------------------------------------------------------------------------
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// static members
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//-----------------------------------------------------------------------------
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LLFrameTimer LLCriticalDamp::sInternalTimer;
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F32 LLCriticalDamp::sTimeDelta;
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F32 LLCriticalDamp::sInterpolants[kNumCachedInterpolants];
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F32 LLCriticalDamp::sInterpolatedValues[kNumCachedInterpolants];
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//-----------------------------------------------------------------------------
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// LLCriticalDamp()
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//-----------------------------------------------------------------------------
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LLCriticalDamp::LLCriticalDamp()
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{
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sTimeDelta = 0.f;
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// Init the core interpolant values (to which many, many enums map)
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//
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setInterpolantConstant(InterpDelta_0_025, 0.025f);
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setInterpolantConstant(InterpDelta_0_05, 0.05f );
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setInterpolantConstant(InterpDelta_0_06, 0.06f);
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setInterpolantConstant(InterpDelta_0_10, 0.10f);
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setInterpolantConstant(InterpDelta_0_15, 0.15f);
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setInterpolantConstant(InterpDelta_0_20, 0.20f);
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setInterpolantConstant(InterpDelta_0_25, 0.25f);
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setInterpolantConstant(InterpDelta_0_30, 0.30f);
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}
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// static
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//-----------------------------------------------------------------------------
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// updateInterpolants()
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//-----------------------------------------------------------------------------
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void LLCriticalDamp::updateInterpolants()
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{
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sTimeDelta = sInternalTimer.getElapsedTimeAndResetF32();
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U32 i;
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for (i = 0; i < kNumCachedInterpolants; i++)
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{
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sInterpolatedValues[i] = llclamp(sTimeDelta / sInterpolants[ i], 0.0f, 1.0f);
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}
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}
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