Function collapseRampParametersInternal

src/IECoreScene/ShaderNetworkAlgo.cpp:869–982

}

IECore::ConstCompoundDataPtr collapseRampParametersInternal( const IECore::ConstCompoundDataPtr &parametersData, const std::string &shaderName )
{

	auto [ positionsSuffix, floatValuesSuffix, colorValuesSuffix, basisSuffix, countSuffix ] = lookupRampParameterSuffixes( shaderName );

	const CompoundDataMap &parameters( parametersData->readable() );
	CompoundDataPtr newParametersData;
	CompoundDataMap *newParameters = nullptr;

	for( const auto &maybeBasis : parameters )
	{
		if( !boost::ends_with( maybeBasis.first.string(), *basisSuffix ) )
		{
			continue;
		}
		const StringData *basis = runTimeCast<const StringData>( maybeBasis.second.get() );
		if( !basis )
		{
			continue;
		}


		std::string prefix = maybeBasis.first.string().substr( 0, maybeBasis.first.string().size() - basisSuffix->size() );
		const IECore::InternedString positionsName = prefix + *positionsSuffix;
		const FloatVectorData *floatPositions = parametersData->member<const FloatVectorData>( positionsName );
		if( !floatPositions )
		{
			continue;
		}

		IECore::InternedString countName;
		const IntData *countData = nullptr;

		if( countSuffix )
		{
			countName = prefix + *countSuffix;
			countData = parametersData->member<const IntData>( countName );

			if( !countData )
			{
				IECore::msg(
					Msg::Error, "ShaderNetworkAlgo",
					"Using spline format that expects count parameter, but no int count parameter found matching \"" + countName.string() + "\""
				);
			}
			else
			{
				if( (int)floatPositions->readable().size() != countData->readable() )
				{
					IECore::msg(
						Msg::Error, "ShaderNetworkAlgo",
						"Spline count \"" + countName.string() + "\" does not match length of data: " + std::to_string( countData->readable() ) + " != " + std::to_string( floatPositions->readable().size() ) + "\""
					);
				}
			}
		}

		IECore::InternedString valuesName = prefix + *floatValuesSuffix;