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/**
* @file llwlanimator.cpp
* @brief Implementation for the LLWLAnimator class.
*
* $LicenseInfo:firstyear=2007&license=viewerlgpl$
* 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 "llviewerprecompiledheaders.h"
#include "llwlanimator.h"
#include "llsky.h"
#include "pipeline.h"
#include "llwlparammanager.h"
LLWLAnimator::LLWLAnimator() : mStartTime(0), mDayRate(1), mDayTime(0),
mIsRunning(FALSE), mUseLindenTime(false)
{
mDayTime = 0;
}
void LLWLAnimator::update(LLWLParamSet& curParams)
{
F64 curTime;
curTime = getDayTime();
// don't do anything if empty
if(mTimeTrack.size() == 0) {
return;
}
// start it off
mFirstIt = mTimeTrack.begin();
mSecondIt = mTimeTrack.begin();
mSecondIt++;
// grab the two tween iterators
while(mSecondIt != mTimeTrack.end() && curTime > mSecondIt->first) {
mFirstIt++;
mSecondIt++;
}
// scroll it around when you get to the end
if(mSecondIt == mTimeTrack.end() || mFirstIt->first > curTime) {
mSecondIt = mTimeTrack.begin();
mFirstIt = mTimeTrack.end();
mFirstIt--;
}
F32 weight = 0;
if(mFirstIt->first < mSecondIt->first) {
// get the delta time and the proper weight
weight = F32 (curTime - mFirstIt->first) /
(mSecondIt->first - mFirstIt->first);
// handle the ends
} else if(mFirstIt->first > mSecondIt->first) {
// right edge of time line
if(curTime >= mFirstIt->first) {
weight = F32 (curTime - mFirstIt->first) /
((1 + mSecondIt->first) - mFirstIt->first);
// left edge of time line
} else {
weight = F32 ((1 + curTime) - mFirstIt->first) /
((1 + mSecondIt->first) - mFirstIt->first);
}
// handle same as whatever the last one is
} else {
weight = 1;
}
// do the interpolation and set the parameters
curParams.mix(LLWLParamManager::instance()->mParamList[mFirstIt->second],
LLWLParamManager::instance()->mParamList[mSecondIt->second], weight);
}
F64 LLWLAnimator::getDayTime()
{
if(!mIsRunning) {
return mDayTime;
}
if(mUseLindenTime) {
F32 phase = gSky.getSunPhase() / F_PI;
// we're not solving the non-linear equation that determines sun phase
// we're just linearly interpolating between the major points
if (phase <= 5.0 / 4.0) {
mDayTime = (1.0 / 3.0) * phase + (1.0 / 3.0);
} else {
mDayTime = phase - (1.0 / 2.0);
}
if(mDayTime > 1) {
mDayTime--;
}
return mDayTime;
}
// get the time;
mDayTime = (LLTimer::getElapsedSeconds() - mStartTime) / mDayRate;
// clamp it
if(mDayTime < 0) {
mDayTime = 0;
}
while(mDayTime > 1) {
mDayTime--;
}
return (F32)mDayTime;
}
void LLWLAnimator::setDayTime(F64 dayTime)
{
//retroactively set start time;
mStartTime = LLTimer::getElapsedSeconds() - dayTime * mDayRate;
mDayTime = dayTime;
// clamp it
if(mDayTime < 0) {
mDayTime = 0;
} else if(mDayTime > 1) {
mDayTime = 1;
}
}
void LLWLAnimator::setTrack(std::map<F32, std::string>& curTrack,
F32 dayRate, F64 dayTime, bool run)
{
mTimeTrack = curTrack;
mDayRate = dayRate;
setDayTime(dayTime);
mIsRunning = run;
}
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