void Shader::parameterHash( const Gaffer::Plug *parameterPlug, NetworkBuilder &network, IECore::MurmurHash &h ) 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 ) ) )
{
h.append( network.shaderHash( n ) );
if( inputPlug != n->outPlug() )
{
// shader has multiple outputs - we need to make sure the particular
// output in question is taken into account by the hash.
h.append( inputPlug->relativeName( n->outPlug() ) );
}
return;
}
// fall through to hash plug value
}
const ValuePlug *vplug = IECore::runTimeCast<const ValuePlug>( parameterPlug );
if( vplug )
{
vplug->hash( h );
}
else
{
h.append( parameterPlug->typeId() );
}
}
