topic Re: How to get duct shape? in Revit API Forum

How to get duct shape?

sr — Wed, 24 Feb 2016 07:16:42 GMT

有没有简单的办法直接获得风管的DuctShape?

我知道接口可以获得shape

Re: How to get duct shape?

Revitalizer — Wed, 24 Feb 2016 08:16:38 GMT

Hi,

I really, really want to help anybody, but don't expect everyone to understand your mother tongue.

http://forums.autodesk.com/t5/revit-api/problema-na-instalacao-do-revit-2015/m-p/6047166/highlight/true#M14438

Revitalizer

Re: How to get duct shape?

jeremytammik — Wed, 24 Feb 2016 09:28:32 GMT

Dear Sr,

Thank you for your query.

Unlike Revitalizer, I understand you perfectly, thanks to Google translate.

You say: "There is no simple way to directly get Duct Shape Duct? I know the user interface can be obtained shape."

You are asking how to determine the cross sectional shape of a duct element.

This used to be a pretty hard question, once upon a time, and several different approaches could be taken, e.g. geometrical analysis, as you can see from these discussions on The Building Coder:

Distinguishing MEP Element Shape -- http://thebuildingcoder.typepad.com/blog/2011/03/distinguishing-mep-element-shape.html
Improved MEP Element Shape -- http://thebuildingcoder.typepad.com/blog/2011/05/improved-mep-element-shape-and-mount-ararat.html

Another way to achieve this is to open the duct fitting family and query the DuctConnector element for its Shape property:

http://adndevblog.typepad.com/aec/2013/03/how-to-get-the-duct-section-shape-for-duct-type-object.html

Unfortunately, opening the family is quite a costly operation.

From Revit 2015 onwards, the simplest an most effective method to achieve what you need is to query the ElementType.FamilyName property:

http://thebuildingcoder.typepad.com/blog/2014/04/whats-new-in-the-revit-2015-api.html#4.05

In your case, that might look like this:

  /// <summary>
  /// Determine element shape from its 
  /// element type's family name property.
  /// </summary>
  static public string GetElementShape4(
    Element e )
  {
    string shape = "unknown";

    ElementId tid = e.GetTypeId();

    if( ElementId.InvalidElementId != tid )
    {
      Document doc = e.Document;

      ElementType etyp = doc.GetElement( tid )
        as ElementType;

      if( null != etyp )
      {
        shape = etyp.FamilyName;
      }
    }
    return shape;
  }

I added this code to The Building Coder samples release 2016.0.126.3, in the module CmdMepElementShape.cs, in lines 719-744:

https://github.com/jeremytammik/the_building_coder_samples

https://github.com/jeremytammik/the_building_coder_samples/releases/tag/2016.0.126.3

https://github.com/jeremytammik/the_building_coder_samples/blob/master/BuildingCoder/BuildingCoder/CmdMepElementShape.cs#L719-L744

I hope this helps.

Best regards,

Jeremy

Re: How to get duct shape?

Charles.Piro — Wed, 24 Feb 2016 09:47:40 GMT

Hi,

like Revitalizer, I'm not sure, of that you want. With the title of your post, I understand that you want find the shape of a duct.

The solution is with the connector.

public ConnectorProfilType GetShape (Duct _duct)
{
  ConnectorProfilType ductShape = null;

  foreach(Connector connect in _duct.ConnectorManager.Connectors)
  {
    if (connect.ConnectorType == ConnectorType.End)
    {
      ductShape = connect.Shape;
      break;
    }
  }

  return ductShape;
}

Re: How to get duct shape?

Revitalizer — Wed, 24 Feb 2016 09:40:15 GMT

Dear Charles,

sr is the author of the thread, not me.

And yes, that's the way to get the Shape, just using the connectors.

Revitalizer

Re: How to get duct shape?

jeremytammik — Wed, 24 Feb 2016 11:05:03 GMT

Thank you, Charles, for chiming in.

I published a summary of these suggestions here:

http://thebuildingcoder.typepad.com/blog/2016/02/ifc-import-levels-and-mep-element-shapes.html#3

Re: How to get duct shape?

Charles.Piro — Wed, 24 Feb 2016 12:59:29 GMT

You're welcome.

thank you too Jeremy.

Re: How to get duct shape?

matteoWNPXW — Wed, 21 Dec 2022 12:10:41 GMT

From Revit 2019 onwards there is also a `Shape` property on the `MEPCurveType`: https://www.revitapidocs.com/2022/06152f02-9c8c-7f53-8e0b-a0d2adac505a.htm

Re: How to get duct shape?

teocomi — Wed, 21 Dec 2022 12:11:48 GMT

From Revit 2019 onwards there is also a `Shape` property on the `MEPCurveType`: https://www.revitapidocs.com/2022/06152f02-9c8c-7f53-8e0b-a0d2adac505a.htm