Assign Parameter Value Based on Another Value

AMS_Aaron · October 25, 2018, 3:27am

Pretty new to Dynamo graphs, and I’ve learned a lot from reading other posts. But I can’t find any to help me out in this situation. I may just be searching for the wrong terms.

Background: Need to assign colors to Fabrication CADmep parts in Revit that will export to Navisworks. You can assign a materials project parameter to Fabrication Pipework & Ductwork. This is separate from the Fabrication database stored material data, which you can’t change in Revit. You can’t bring those into Revit (unless I’ve missed something) and assign a color, either. With the created project parameter, you can select from Revit Materials, and give the specific Fabrication Service their own color.

As you can see in the graph, I can get this to run without error, but it assigns the same value to all the Fabrication Parts.

I’m missing a step that will assign the correct Material Element ID to the correct Fabrication part based on Fabrication Service Abbreviation.

I hope those with more knowledge can give me a hand in getting this to run correctly.

Thanks in advance

Fabrication MEP Colors.dyn (27.8 KB)

Rajkumar_Nallusamy · October 25, 2018, 8:18am

Hi @AMS_Aaron, You can use Conditional and Looping staments such as If() and for() to achieve the same.

m.rijsmus · October 25, 2018, 8:29am

In the IN list you have 3 Materials left after the filtering.
You can assign only one material to every Fabrication Part, unless you have more than one Material parameter.
When you assign 3 Materials to every Fabrication Part only the last one (or firstone ) will stick.

First decide which material you need in which Fab-part and filter accordingly.

AMS_Aaron · October 25, 2018, 12:11pm

Thanks for the response @Rajkumar_Nallusamy, I’ll have to study up more on those statements. Very new to this, so this may take a while.

@m.rijsmus, thanks for replying. I understand that I can only assign the one material per part. I was hoping to assign that specific material to the part by service abbreviation without having to go through the filtering process of each service.

m.rijsmus · October 25, 2018, 2:06pm

Try using GroupByKey on the service abbreviation.

http://dictionary.dynamobim.com/#/Core/List/Action/GroupByKey

AMS_Aaron · October 29, 2018, 4:13pm

Sorry for the late reply. But this node was what I was needing to get the proper values to populate.

Thanks all for the help.

pipefitter72 · March 19, 2019, 5:30pm

This very handy, any chance I can get a look at the final?

AMS_Aaron · March 19, 2019, 5:43pm

Fabrication MEP Pipe Colors by Active View.dyn (59.7 KB)

Here you go. I’ve noticed that after some Revit updates, the Categories box will change. You’ll have to double check that before running this script.

pipefitter72 · March 19, 2019, 5:58pm

Thanks, we are just switching over from Fabrication to Revit. I really appreciate it.

Regards,

S. Kane Hobbs

Piping Designer

Direct: 404-624-8746

www.mckenneys.com

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AMS_Aaron · March 19, 2019, 6:20pm

One thing to note. You’ll have to add a Material Parameter to the MEP Fabrication parts so you can assign this parameter value. You will not be able to change the material of the MEP part due to it being controlled by the database.

We named it differently than Material, so we know it’s new, and not the one Revit has built-in.

pipefitter72 · March 19, 2019, 6:39pm

Thanks, I am adding “new material” as a project parameter.