void MixSmoothSkinningWeightsOp::modify( Object * object, const CompoundObject * operands )
{
SmoothSkinningData *skinningData = static_cast<SmoothSkinningData *>( object );
assert( skinningData );
SmoothSkinningData *origMixingData = runTimeCast<SmoothSkinningData>( m_skinningDataParameter->getValidatedValue() );
if ( !origMixingData )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix is not valid" );
}
assert( origMixingData );
// make sure the number of influences matches
if ( origMixingData->influenceNames()->readable().size() != skinningData->influenceNames()->readable().size() )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix and input have different numbers of influences" );
}
std::vector<float> &mixingWeights = m_mixingWeightsParameter->getTypedValue();
// make sure there is one mixing weight per influence
if ( mixingWeights.size() != skinningData->influenceNames()->readable().size() )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: There must be exactly one mixing weight per influence" );
}
// decompress both sets of skinning data
DecompressSmoothSkinningDataOp decompressionOp;
decompressionOp.inputParameter()->setValidatedValue( skinningData );
decompressionOp.copyParameter()->setTypedValue( false );
decompressionOp.operate();
decompressionOp.inputParameter()->setValidatedValue( origMixingData );
decompressionOp.copyParameter()->setTypedValue( true );
decompressionOp.operate();
const SmoothSkinningData *mixingData = runTimeCast<const SmoothSkinningData>( decompressionOp.resultParameter()->getValidatedValue() );
if ( !mixingData )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix did not decompress correctly" );
}
// make sure everything matches except the weights
if ( *(mixingData->pointIndexOffsets()) != *(skinningData->pointIndexOffsets()) )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix and input have different pointIndexOffsets when decompressed" );
}
if ( *(mixingData->pointInfluenceCounts()) != *(skinningData->pointInfluenceCounts()) )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix and input have different pointInfluenceCounts when decompressed" );
}
if ( *(mixingData->pointInfluenceIndices()) != *(skinningData->pointInfluenceIndices()) )
{
throw IECore::Exception( "MixSmoothSkinningWeightsOp: skinningDataToMix and input have different pointInfluenceIndices when decompressed" );
}
const std::vector<int> &inputIndexOffsets = skinningData->pointIndexOffsets()->readable();
const std::vector<int> &inputInfluenceCounts = skinningData->pointInfluenceCounts()->readable();
const std::vector<int> &inputInfluenceIndices = skinningData->pointInfluenceIndices()->readable();
std::vector<float> &inputInfluenceWeights = skinningData->pointInfluenceWeights()->writable();
const std::vector<float> &mixingInfluenceWeights = mixingData->pointInfluenceWeights()->readable();
LinearInterpolator<float> lerp;
// mix the weights
for ( unsigned i=0; i < inputIndexOffsets.size(); i++ )
{
for ( int j=0; j < inputInfluenceCounts[i]; j++ )
{
int current = inputIndexOffsets[i] + j;
lerp( mixingInfluenceWeights[current], inputInfluenceWeights[current], mixingWeights[ inputInfluenceIndices[current] ], inputInfluenceWeights[current] );
}
}
// re-compress the input data
CompressSmoothSkinningDataOp compressionOp;
compressionOp.inputParameter()->setValidatedValue( skinningData );
compressionOp.copyParameter()->setTypedValue( false );
compressionOp.operate();
}
