topic Re: Finding Geometry Objects? (newbie question) in Revit API Forum

Finding Geometry Objects? (newbie question)

Anonymous — Tue, 08 Sep 2015 10:26:41 GMT

Hi,

Sorry If this has been asked and it might seem like a dumb question but I have very minimal/no experience with GeometryObjects in revit and most of my work has been based on filtering Elements.

I want to know if it is possible to Find geometry objects in the without prompting the user to select one?

can I use pickobject to select all or individual curves or lines to get all references programmaticaly?

Cheers

Re: Finding Geometry Objects? (newbie question)

jeremytammik — Tue, 08 Sep 2015 19:08:29 GMT

Dear Mendo,

Good question.

The Revit database contains elements.

They are mainly defined parametrically.

This generates their geometry.

You can query an element for its geometry.

The geometry objects are therefore more or less a read-only view of the elements and their parameters.

Yes, you can retrieve geometry without prompting the user, e.g. traversing all elements or a subset via a filtered element collector and querying each for its geometry.

My most recent foray into this area was published today:

http://thebuildingcoder.typepad.com/blog/2015/09/directshape-from-face-and-sketch-plane-reuse.html

The Building Coder has discussed hundreds of other examples of geometry retrieval and analysis:

http://thebuildingcoder.typepad.com/blog/geometry

Some of the more interesting discussions are listed in various topic groups:

http://thebuildingcoder.typepad.com/blog/about-the-author.html#5

One related area is exporting element geometry in various ways.

The easiest way to do so nowadays is to use a custom exporter:

http://thebuildingcoder.typepad.com/blog/about-the-author.html#5.1

That hooks directly into the graphics pipeline and eliminates the need to query each individual element for its geometry.

Cheers,

Jeremy