assign material to directshape via paint

[Ning_Zhou]

seems it's not working.

I tried 2017 new ShapeImporter to create DirectShape element, works fine, but doesn't work when using Document.Paint, is it because I have to use it before or during creating DirectShape? if so then how to get Element Id, I mean e.Id of doc.Paint(e.Id, face, mat.Id) in which e is newly created DirectShape element.

besides, still no way to directly assign material to DirectShape element?

[Mustafa.Salaheldin]

Can you please provide a sample of your Revit project and the VS solution, so I may can help.

[Ning_Zhou]

thanks Mustafa for your reply.

I noticed that I cannot paint directshape element in the GUI so I assume it's not doable via API

http://forums.autodesk.com/t5/revit-api-forum/applying-material-to-solid/m-p/5836373/highlight/false...

per Jeremy's post, seems the only way is via TessellatedFace.MaterialId, it will add material at the time of creating directshape element, not afterward

[jeremytammik · Accepted solution]

Dear Ning,

Thank you for your query.

As far as I know, you can assign a category to a direct shape.

You can use that to control the material.

You can also assign sub-categories, over which you can have total control, afaik.

Does that possibly provide all you need?

I hope this helps.

Best regards,

Jeremy

[Ning_Zhou]

thanks Jeremy for your time looking into this issue and the workarounds you provided, works fine in most cases especially for VG Overrides per view even though it's not a real material.

just a thought, i assume ShapImporter is created from TessellatedFaces, if so then material option will be great just like

shapeImporter.InputFormat = ShapeImporterSourceFormat.SAT;

[jeremytammik]

Dear Ning,

Thank you for your update and appreciation.

I am very glad it helps.

Can you provide a minimal non-confidential sample demonstrating how you use it for me to share on the blog?

I do not quite understand the second part describing your wish. Can you clarify that, please?

Thank you!

Best regards,

Jeremy

[Ning_Zhou]

thanks Jeremy,

the following code is from RevitAPI.chm

ShapeImporter shapeImporter = new ShapeImporter();
shapeImporter.InputFormat = ShapeImporterSourceFormat.SAT;
IList<GeometryObject> shapes = shapeImporter.Convert(revitDoc, ofd.FileName);

if (shapes.Count != 0)
{
  using (Transaction tr = new Transaction(revitDoc, "Create a DirectShape"))
  {
   tr.Start();

  DirectShape dsImportedSat = DirectShape.CreateElement(revitDoc, new ElementId(BuiltInCategory.OST_Walls));
   dsImportedSat.SetShape(shapes);

  tr.Commit();
  }
}

my wish is something like below

shapeImporter.MaterialId = whatever;

is ShapeImporter class developed based on TessellatedShapeBuilder class?

the following code is also from RevitAPI.chm

TessellatedShapeBuilder builder = new TessellatedShapeBuilder();

// omitted

builder.AddFace(new TessellatedFace(loopVertices, materialId));

// omitted

hope it helps.

[jeremytammik]

Dear Ning,

There may be a good reason why the TessellatedFace provides that option and the ShapeImporter does not.

Please provide a detailed description of exactly what you wish to achieve and why, so I can ask the development team what approach they would suggest.

Thank you!

Cheers,

Jeremy

[Ning_Zhou]

thanks Jeremy, this issue is not that critical so i'll take your suggestion as solution

[BOb_Zhu]

How can I assign sub-categories for DirectShape?I know that,When creating a DirectShape,I only set a Top-Level categoy.

[jeremytammik]

Here, it says that the old version only supported top-level categories, before Revit 2017:

https://thebuildingcoder.typepad.com/blog/2016/04/whats-new-in-the-revit-2017-api.html#2.18

[BOb_Zhu]

Thanks Jeremy!

[BOb_Zhu]

DirectShape ds = DirectShape.CreateElement(doc, subCategory.Id);

 After being tested on revit2018, this is not yet possible，Can you point out the right way？

[jeremytammik]

The correct way is always to RTFM; in this case, the developer guide section on DirectShape:

http://help.autodesk.com/view/RVT/2020/ENU/?guid=Revit_API_Revit_API_Developers_Guide_Revit_Geometri...

I'm sorry to say it is still impossible, presumably intentionally:

A DirectShape object may be assigned a top-level Model category, such as the Wall category. Sub-categories cannot be assigned to DirectShape elements. The IsValidCategoryId() method can test a category id to make sure it is a top-level built-in category approved for use with DirectShape and the Category.CategoryType enumerated value will indicated if the category type is Model.

Best regards,

Jeremy

[zhongding_cui]

The "accepted solution" is very misleading. Please take it down and make the latest reply "intentionally impossible" as the "solution".