Dynamo List MinimumItem

[endison8]

Hi everyone,

I was trying to get the lowest room surface by comparing their Z value of center point.

I tried to use "List.MinimumItemByKey" and "List.SortByKey", but both of them didn't succeed.

Finally, I used "filterbyboolmask" to do the job.

However, I am very confused why the other two methods failed("List.MinimumItemByKey" and "List.SortByKey")?

Can anyone tell me? Thank you very much.

[RDAOU]

@endison8 

They are not working for 2 main reasons:

1. You are using them outside their intended use 
2. They expect an input which is 1) a function and 2) a variable BUT you are feeding them with a double 

Apart from the above you are over complicating a simple graph. If you want to get rooms sorted based on lowest/highest, you can simply use the Top Offset Parameter of the room.

[endison8]

@RDAOU 

Hi, thank you for the quick reply.

I'm not sure I get it right but I wasn't getting the lowest/highest room though.

I was trying to get the "bottom Surface" of the room, that's why I want to sort or get the minimum z point value of all the room surface centers.

[RDAOU · Accepted solution]

@endison8 

Then use the following...you can extract/filter faces (Top face or bottom) >> perimeter curves >> start point >> Polygon.bypoints >> Polygon.Center >> Flatten >> Point.Z

• Then use the node List.SortbyKey ... to sort the Room List from lowest to highest

Works better in case the rooms are under a sloped or curved roof

[endison8]

This is GREAT!! Thank you very much!!