IECore::ObjectVectorPtr AppleseedLight::computeLight( const Gaffer::Context *context ) const
{
IECoreScene::ShaderPtr result = new IECoreScene::Shader( modelPlug()->getValue(), "as:light" );
for( InputValuePlugIterator it( parametersPlug() ); !it.done(); ++it )
{
result->parameters()[(*it)->getName()] = CompoundDataPlug::extractDataFromPlug( it->get() );
}
IECore::ObjectVectorPtr resultVector = new IECore::ObjectVector();
resultVector->members().push_back( result );
return resultVector;
}
IECore::InternedString handle( const Shader *shaderNode )
{
assert( shaderNode );
assert( shaderNode->enabledPlug()->getValue() );
CycleDetector cycleDetector( m_downstreamShaders, shaderNode );
HandleAndHash &handleAndHash = m_shaders[shaderNode];
if( !handleAndHash.handle.string().empty() )
{
return handleAndHash.handle;
}
std::string type = shaderNode->typePlug()->getValue();
if( shaderNode != m_output->node() && !boost::ends_with( type, "shader" ) )
{
// Some renderers (Arnold for one) allow surface shaders to be connected
// as inputs to other shaders, so we may need to change the shader type to
// convert it into a standard shader. We must take care to preserve any
// renderer specific prefix when doing this.
size_t i = type.find_first_of( ":" );
if( i != std::string::npos )
{
type = type.substr( 0, i + 1 ) + "shader";
}
else
{
type = "shader";
}
}
IECoreScene::ShaderPtr shader = new IECoreScene::Shader( shaderNode->namePlug()->getValue(), type );
const std::string nodeName = shaderNode->nodeNamePlug()->getValue();
shader->blindData()->writable()["gaffer:nodeName"] = new IECore::StringData( nodeName );
shader->blindData()->writable()["gaffer:nodeColor"] = new IECore::Color3fData( shaderNode->nodeColorPlug()->getValue() );
vector<IECoreScene::ShaderNetwork::Connection> inputConnections;
addParameterWalk( shaderNode->parametersPlug(), IECore::InternedString(), shader.get(), inputConnections );
handleAndHash.handle = m_network->addShader( nodeName, std::move( shader ) );
for( const auto &c : inputConnections )
{
m_network->addConnection( { c.source, { handleAndHash.handle, c.destination.name } } );
}
return handleAndHash.handle;
}
IECore::ObjectVectorPtr ArnoldLight::computeLight( const Gaffer::Context *context ) const
{
IECore::ObjectVectorPtr result = new IECore::ObjectVector;
IECoreScene::ShaderPtr lightShader = new IECoreScene::Shader( shaderNamePlug()->getValue(), "ai:light" );
for( InputPlugIterator it( parametersPlug() ); !it.done(); ++it )
{
if( const Shader *shader = (*it)->source<Plug>()->ancestor<Shader>() )
{
/// \todo We should generalise Shader::NetworkBuilder so we can
/// use it directly to do the whole of the light generation, instead
/// of dealing with input networks manually one by one here. Alternatively
/// we could take the approach that OSLLight takes, and use an internal
/// ArnoldShader to do all the shader loading and network generation.
/// This would avoid exposing any Shader internals, and would generalise
/// nicely to the other Light subclasses too.
IECore::ConstCompoundObjectPtr inputAttributes = shader->attributes();
const IECore::ObjectVector *inputNetwork = inputAttributes->member<const IECore::ObjectVector>( "ai:surface" );
if( !inputNetwork || inputNetwork->members().empty() )
{
continue;
}
// Add input network into our result.
result->members().insert( result->members().end(), inputNetwork->members().begin(), inputNetwork->members().end() );
// Update endpoint of network with a handle we can refer to it with.
result->members().back() = result->members().back()->copy();
IECoreScene::Shader *endpoint = static_cast<IECoreScene::Shader *>( result->members().back().get() );
endpoint->parameters()["__handle"] = new IECore::StringData( (*it)->getName() );
// Add a parameter value linking to the input network.
lightShader->parameters()[(*it)->getName()] = new IECore::StringData( "link:" + (*it)->getName().string() );
}
else if( ValuePlug *valuePlug = IECore::runTimeCast<ValuePlug>( it->get() ) )
{
lightShader->parameters()[valuePlug->getName()] = CompoundDataPlug::extractDataFromPlug( valuePlug );
}
}
result->members().push_back( lightShader );
return result;
}