MStatus MeshParameterHandler::doSetValue( IECore::ConstParameterPtr parameter, MPlug &plug ) const
{
IECore::ConstObjectParameterPtr p = IECore::runTimeCast<const IECore::ObjectParameter>( parameter );
if( !p )
{
return MS::kFailure;
}
MFnMeshData fnData;
MObject data = fnData.create();
/// \todo Pull in userData from parameter to set up conversion parameters
ToMayaObjectConverterPtr converter = ToMayaObjectConverter::create( p->getValue(), MFn::kMeshData );
assert(converter);
bool conversionSuccess = converter->convert( data );
if ( !conversionSuccess )
{
return MS::kFailure;
}
/// \todo It seems like this can occassionally fail, usually with an empty mesh, but sometimes not. Try to establish exactly why.
plug.setValue( data );
return MS::kSuccess;
}
MStatus ObjectParameterHandler::doSetValue( IECore::ConstParameterPtr parameter, MPlug &plug ) const
{
IECore::ConstObjectParameterPtr p = IECore::runTimeCast<const IECore::ObjectParameter>( parameter );
if( !p )
{
return MS::kFailure;
}
// Keep trying all the available handlers until we find one that works.
/// \todo Investigate whether we can do a parameter->getValue() here and just get the handler which represents it
for (IECore::ObjectParameter::TypeIdSet::const_iterator it = p->validTypes().begin(); it != p->validTypes().end(); ++it)
{
ConstParameterHandlerPtr h = ParameterHandler::create( *it );
if (h)
{
if ( h->doSetValue( parameter, plug) )
{
return MS::kSuccess;
}
}
}
MStatus s;
MFnPluginData fnData;
MObject plugData = fnData.create( ObjectData::id );
assert( plugData != MObject::kNullObj );
s = fnData.setObject( plugData );
assert(s);
ObjectData* data = dynamic_cast<ObjectData *>( fnData.data(&s) );
assert(s);
assert(data);
data->setObject( p->getValue()->copy() );
return plug.setValue( plugData );
}
MStatus ObjectParameterHandler::doUpdate( IECore::ConstParameterPtr parameter, MPlug &plug ) const
{
IECore::ConstObjectParameterPtr p = IECore::runTimeCast<const IECore::ObjectParameter>( parameter );
if( !p )
{
return MS::kFailure;
}
MObject attribute = plug.attribute();
MFnGenericAttribute fnGAttr( attribute );
if( !fnGAttr.hasObj( attribute ) )
{
return MS::kFailure;
}
fnGAttr.addAccept( ObjectData::id );
// maya has an odd behaviour whereby a generic attribute with only one accepted datatype will
// transform itself into a typed attribute after file save and load. here we add an accept
// for a second dummy datatype to ensure that the attribute will still be a generic attribute
// when saved and loaded.
fnGAttr.addAccept( DummyDataId );
for (IECore::ObjectParameter::TypeIdSet::const_iterator it = p->validTypes().begin(); it != p->validTypes().end(); ++it)
{
ConstParameterHandlerPtr h = ParameterHandler::create( *it );
if (h)
{
if ( !h->doUpdate( parameter, plug ) )
{
return MS::kFailure;
}
}
}
return finishUpdating( parameter, plug );
}