Exporting Image from View (Zoomed to Bounding Box)

[Anonymous]

 Hello All,

             Is there any way to use Document.ExportImage() but only export an image that is zoomed to a bounding box around an object? I'm trying to export images from a DraftingView, but there seems to be no way to zoom the image to a bounding box around a single object on the DraftingView before generating the image. Any help would be greatly appreciated.

          Thank You,

                  James Kerfoot 

[jeremytammik]

Dear James,

Thank you for your query.

I see two possible approaches to achieve this:

• Use ExportImage; this requires you to set up the view appropriately, so it displays only the desired object
• Use a generic .NET library to make a screen snapshot of a partial Revit view; you could use the UIView class to determine the Windows screen coordinates, i.e., pixels, to capture.

I suggest you go for the former approach and take a look at some of the discussions in The Building Coder topic group on setting up a 3D view:

https://thebuildingcoder.typepad.com/blog/about-the-author.html#5.37

Several of them deal with exporting individual elements to specific file formats.

You could use a similar approach to isolate and zoom to an element in a given view before exporting that.

This post shows how to set up a section view to display a single element:

https://thebuildingcoder.typepad.com/blog/2012/06/create-section-view-parallel-to-wall.html

If you also isolate the element, it should give you just what you need.

I hope this helps.

Best regards,

Jeremy

[BenoitE&A]

Hi James,

Just falling on your post from another and fun !! I've been working on this the last month.

Yes you can use Document.ExportImage() to create images of a Cropped View. 

You can easily determine the CropRegion using yourObject.get_BoundingBox(yourView) and expand it if it does not please you.

Then you can apply this CropRegion to your view (view.CropBox = myBoundingBox).

And Export the view using ExportRange.CurrentView.

Benoit