Setting the LOD value on ExportContext

[ebarMLN7G]

I can set the LOD level on Face instances:

// Summary:
// Returns a triangular mesh approximation to the face.
//
// Parameters:
// levelOfDetail:
// The level of detail. Its range is from 0 to 1. 0 is the lowest level of detail
// and 1 is the highest.
//
// Exceptions:
// T:Autodesk.Revit.Exceptions.ArgumentOutOfRangeException:
// Thrown when level of detail is less than 0 or greater than 1.
public Mesh Triangulate(double levelOfDetail);

But that will not give me any UV mapping information. For that I need to use ExportContext, and that way I will receive PolymeshTopology instances which are already tessellated and it doesn't seem like there is a way to set the LOD level for them.

How can I set the LOD level, get tessellated geometry, and also get UV mapping information?

[jeremytammik]

Dear Ehsan,

Thank you for your query.

Good question.

I fear that this functionality may not currently be in there. In that case, you will need to raise a wish for this in the Revit Idea Station and ensure it gets lots of votes.

However, I am checking with the development team for you to see if there is any other way.

Thank you for your patience.

Best regards,

Jeremy

[ebarMLN7G]

Thanks Jeremy for following up on this. I will keep my fingers crossed! Certainly a critical need for us.

[jeremytammik]

Dear Ehsan,

Thank you for your patience and appreciation.

I am sorry to say that the development team cannot provide any immediate solution:

There were several discussions regarding overly complex customer workflows, such as exporting multiple times to only get a single element worth from each pass. I think that other teams ran into something similar. The issue of being able to control LOD better came up before. UVs are a slightly different matter, since old polymesh code is usually the obstacle.

It seems like there is some not insignificant work for this one.

Please file a wish list item on the Revit Ideas Station for now, if there is not one there already, and ensure that it gets many votes.

Thank you.

I guess the workaround would involve something like what they hint at above, exporting in multiple passes to obtain different bits and pieces in different LODs.

Best regards,

Jeremy