IECore::DataPtr Shader::parameterValue( const Gaffer::Plug *parameterPlug, NetworkBuilder &network ) const
{
const Plug *inputPlug = parameterPlug->source<Plug>();
if( inputPlug != parameterPlug )
{
const Shader *n = IECore::runTimeCast<const Shader>( inputPlug->node() );
if( n && ( inputPlug == n->outPlug() || n->outPlug()->isAncestorOf( inputPlug ) ) )
{
const std::string &shaderHandle = network.shaderHandle( n );
if( !shaderHandle.size() )
{
return NULL;
}
std::string result = "link:" + shaderHandle;
if( n->outPlug()->isAncestorOf( inputPlug ) )
{
result += "." + inputPlug->relativeName( n->outPlug() );
}
return new IECore::StringData( result );
}
// fall through to use plug value
}
if( const Gaffer::ValuePlug *valuePlug = IECore::runTimeCast<const Gaffer::ValuePlug>( parameterPlug ) )
{
return Gaffer::CompoundDataPlug::extractDataFromPlug( valuePlug );
}
return NULL;
}
IECore::DataPtr RenderManShader::parameterValue( const Gaffer::Plug *parameterPlug, NetworkBuilder &network ) const
{
if( parameterPlug->typeId() == Plug::staticTypeId() )
{
// coshader parameter
const Plug *inputPlug = parameterPlug->source<Plug>();
if( inputPlug && inputPlug != parameterPlug )
{
const RenderManShader *inputShader = inputPlug->parent<RenderManShader>();
if( inputShader )
{
const std::string &handle = network.shaderHandle( inputShader );
if( handle.size() )
{
return new StringData( handle );
}
}
}
}
else if( parameterPlug->isInstanceOf( ArrayPlug::staticTypeId() ) )
{
// coshader array parameter
StringVectorDataPtr value = new StringVectorData();
for( InputPlugIterator cIt( parameterPlug ); cIt != cIt.end(); ++cIt )
{
const Plug *inputPlug = (*cIt)->source<Plug>();
const RenderManShader *inputShader = inputPlug && inputPlug != *cIt ? inputPlug->parent<RenderManShader>() : 0;
if( inputShader )
{
value->writable().push_back( network.shaderHandle( inputShader ) );
}
else
{
value->writable().push_back( "" );
}
}
return value;
}
return Shader::parameterValue( parameterPlug, network );
}
IECore::DataPtr ArnoldShader::parameterValue( const Gaffer::Plug *plug, NetworkBuilder &network ) const
{
const Plug *inputPlug = plug->getInput<Plug>();
if( inputPlug )
{
const ArnoldShader *n = IECore::runTimeCast<const ArnoldShader>( inputPlug->node() );
if( n && inputPlug == n->outPlug() )
{
const std::string &shaderHandle = network.shaderHandle( n );
if( shaderHandle.size() )
{
return new IECore::StringData( "link:" + shaderHandle );
}
return 0;
}
}
return Shader::parameterValue( plug, network );
}