Method removeUnusedShaders

src/IECoreScene/ShaderNetworkAlgo.cpp:117–134

} // namespace

void ShaderNetworkAlgo::removeUnusedShaders( ShaderNetwork *network )
{
	std::unordered_set<InternedString> visited;
	visitInputs( network, network->getOutput().shader, visited );

	auto shaders = network->shaders();
	for( auto it = shaders.begin(); it != shaders.end(); )
	{
		if( visited.find( it->first ) == visited.end() )
		{
			it = network->removeShader( it );
		}
		else
		{
			++it;
		}
	}
}

//////////////////////////////////////////////////////////////////////////
// Component connection adapters