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//-*****************************************************************************
//
// Copyright (c) 2009-2011,
// Sony Pictures Imageworks Inc. and
// Industrial Light & Magic, a division of Lucasfilm Entertainment Company Ltd.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Sony Pictures Imageworks, nor
// Industrial Light & Magic, nor the names of their contributors may be used
// to endorse or promote products derived from this software without specific
// prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//-*****************************************************************************
#include "SampleUtil.h"
#include <ri.h>
//-*****************************************************************************
void WriteMotionBegin( ProcArgs &args, const SampleTimeSet &sampleTimes )
{
std::vector<RtFloat> outputTimes;
outputTimes.reserve( sampleTimes.size() );
// We are going to refit sample times from the alembic from the desired
// sample shutter range to the requested motion block.
chrono_t shutterOpenTime = ( args.frame + args.shutterOpen ) / args.fps;
chrono_t shutterCloseTime = ( args.frame + args.shutterClose ) / args.fps;
chrono_t shutterLen = shutterCloseTime - shutterOpenTime;
chrono_t motionBlockLen = args.motionEnd - args.motionBegin;
// why is this static?
static const chrono_t epsilon = 1.0 / 10000.0;
bool remap = args.userMotionBlockDefined();
if ( remap && fabs(motionBlockLen) < epsilon ) {
std::cerr << "Warning: motionstart and motionend are the same value, not remapping" << std::endl;
remap = false;
}
if ( remap && motionBlockLen < 0 ) {
std::cerr << "Warning: motionend starts before motionstart, not remapping" << std::endl;
remap = false;
}
chrono_t frameTime = args.frame / args.fps;
for ( SampleTimeSet::const_iterator iter = sampleTimes.begin();
iter != sampleTimes.end() ; ++iter )
{
RtFloat value;
if ( remap )
// standard (open) fit(x,a0,a1,b0,b1) return (x-a0)*(b1-b0)/(a1-a0) + b0
value = ((*iter)-shutterOpenTime)*motionBlockLen/shutterLen + args.motionBegin;
else
value = ( (*iter) - frameTime ) * args.fps;
if ( fabs( value ) < epsilon )
{
value = 0.0f;
}
outputTimes.push_back( value );
}
RiMotionBeginV( outputTimes.size(), &outputTimes[0] );
}
//-*****************************************************************************
void WriteConcatTransform( const M44d &m )
{
RtMatrix rtm;
for ( int row = 0; row < 4; ++row )
{
for ( int col = 0; col < 4; ++col )
{
rtm[row][col] = (RtFloat)( m[row][col] );
}
}
RiConcatTransform( rtm );
}
//-*****************************************************************************
void GetRelevantSampleTimes( ProcArgs &args, TimeSamplingPtr timeSampling,
size_t numSamples, SampleTimeSet &output )
{
if ( numSamples < 2 )
{
output.insert( 0.0 );
return;
}
chrono_t frameTime = args.frame / args.fps;
chrono_t shutterOpenTime = ( args.frame + args.shutterOpen ) / args.fps;
chrono_t shutterCloseTime = ( args.frame + args.shutterClose ) / args.fps;
std::pair<index_t, chrono_t> shutterOpenFloor =
timeSampling->getFloorIndex( shutterOpenTime, numSamples );
std::pair<index_t, chrono_t> shutterCloseCeil =
timeSampling->getCeilIndex( shutterCloseTime, numSamples );
//TODO, what's a reasonable episilon?
static const chrono_t epsilon = 1.0 / 10000.0;
//check to see if our second sample is really the
//floor that we want due to floating point slop
//first make sure that we have at least two samples to work with
if ( shutterOpenFloor.first < shutterCloseCeil.first )
{
//if our open sample is less than open time,
//look at the next index time
if ( shutterOpenFloor.second < shutterOpenTime )
{
chrono_t nextSampleTime =
timeSampling->getSampleTime( shutterOpenFloor.first + 1 );
if ( fabs( nextSampleTime - shutterOpenTime ) < epsilon )
{
shutterOpenFloor.first += 1;
shutterOpenFloor.second = nextSampleTime;
}
}
}
for ( index_t i = shutterOpenFloor.first; i < shutterCloseCeil.first; ++i )
{
output.insert( timeSampling->getSampleTime( i ) );
}
//no samples above? put frame time in there and get out
if ( output.size() == 0 )
{
output.insert( frameTime );
return;
}
chrono_t lastSample = *(output.rbegin() );
//determine whether we need the extra sample at the end
if ( ( fabs( lastSample - shutterCloseTime ) > epsilon )
&& lastSample < shutterCloseTime )
{
output.insert( shutterCloseCeil.second );
}
}
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