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/**
* @file llcriticaldamp.cpp
* @brief Implementation of the critical damping functionality.
*
* $LicenseInfo:firstyear=2002&license=viewerlgpl$
* 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
* $/LicenseInfo$
*/
#include "linden_common.h"
#include "llcriticaldamp.h"
//-----------------------------------------------------------------------------
// static members
//-----------------------------------------------------------------------------
LLFrameTimer LLCriticalDamp::sInternalTimer;
F32 LLCriticalDamp::sTimeDelta;
F32 LLCriticalDamp::sInterpolants[kNumCachedInterpolants];
F32 LLCriticalDamp::sInterpolatedValues[kNumCachedInterpolants];
//-----------------------------------------------------------------------------
// LLCriticalDamp()
//-----------------------------------------------------------------------------
LLCriticalDamp::LLCriticalDamp()
{
sTimeDelta = 0.f;
// Init the core interpolant values (to which many, many enums map)
//
setInterpolantConstant(InterpDelta_0_025, 0.025f);
setInterpolantConstant(InterpDelta_0_05, 0.05f );
setInterpolantConstant(InterpDelta_0_06, 0.06f);
setInterpolantConstant(InterpDelta_0_10, 0.10f);
setInterpolantConstant(InterpDelta_0_15, 0.15f);
setInterpolantConstant(InterpDelta_0_20, 0.20f);
setInterpolantConstant(InterpDelta_0_25, 0.25f);
setInterpolantConstant(InterpDelta_0_30, 0.30f);
}
// static
//-----------------------------------------------------------------------------
// updateInterpolants()
//-----------------------------------------------------------------------------
void LLCriticalDamp::updateInterpolants()
{
sTimeDelta = sInternalTimer.getElapsedTimeAndResetF32();
U32 i;
for (i = 0; i < kNumCachedInterpolants; i++)
{
sInterpolatedValues[i] = llclamp(sTimeDelta / sInterpolants[ i], 0.0f, 1.0f);
}
}
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