vla-getentity

[gcsjlewis]

I am trying to understand the vla-getentity command.  I understand it returns nil so i do not know exactly what its grabbing.  Is there a way to pass an already selected item through this?  I am trying to get the boundingbox of a viewport that i have in a selection set already.

[Kent1Cooper · Accepted solution]

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@gcsjlewis wrote:

....  I am trying to get the boundingbox of a viewport that i have in a selection set already.

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Since (vla-...) functions aren't included in AutoCAD's Customization Guide Help, I don't know exactly, either.  But you can do that without (vla-getEntity):

  (vla-getboundingbox (vlax-ename->vla-object EntityName) 'minpt 'maxpt)
  (setq
    LL (vlax-safearray->list minpt); Lower Left corner
    UR (vlax-safearray->list maxpt); Upper Right
  )

where EntityName can a variable that it's stored in, or can be from (ssname SelectionSetName IndexNumber) or (car (entsel....)).

[DannyNL]

vla-GetEntity is a method supported by the Utility object. You can compare it to entsel and it requires the user to select an object/point in the drawing.

See: http://help.autodesk.com/view/ACD/2018/ENU/?guid=GUID-69164FAA-F3C7-47A4-962C-5F4B2D5BC583

So to get the bounding box of an object that you already selected or is in a selection set, use the method Kent described.