Topic: ssget with Handles as filter

[Amsterdammed]

Hello everybody,

For my animation program I store some “scenes” in a dictionary. So I can record them later. (Since rendering takes time this will be at night). To make the whole thing president, (I mean I want to be able to record a scene I defined in an earlier acad session) I store the handles of the entities involved in the scene in a list in the dictionary.

But

Code: [Select]

   (ssget "X" (list (cons 5 x)))
 
returns nil.

Can’t I ssget on Handles? So do I have to run trough a wider ssget selection and than check every en for the right handle?

Tia,

Bernd

[Kerry]

Since you have the handles available,
the Lisp function HANDENT Returns an object (entity) name based on its handle.

[SMadsen]

If you're using Dictionaries, why not store the entity names? Then if you want to build a selection set, you'll just use SSADD.

[Jürg Menzi]

In addition to the other answers...
From help:
The ssget function recognizes all group codes except entity names (group –1), handles (group 5), and xdata codes (groups greater than 1000).

[Amsterdammed]

Right Juerg,

SMadsen, i thought entities names can change when i reopen the drawing.

Kerry, the handent function was i was overlooking, never worked with handles before. Thanks, i does the trick.

Thanks to all, Bernd

[SMadsen]

SMadsen, i thought entities names can change when i reopen the drawing.

True, entity names are memory adresses that are assigned when creating the drawing database. But the references within the drawing file remain valid at any time. Otherwise, they'd be useless and wouldn't exist.

For a job like yours, I'd create a Dictionary and populate it with XRecords for each scene and assign entities to a code between 350-359.

[Crank]

Code: [Select]

   (ssget "X" (list (cons 5 x)))
 
returns nil.

Can’t I ssget on Handles? So do I have to run trough a wider ssget selection and than check every en for the right handle?

Remove handle:

Code: [Select]

(defun remhandle (handle / )
   (ssdel (handent handle) (ssget "X"))
)

Get handle:

Code: [Select]

(defun gethandle (handle / )
   (ssadd (handent handle))
)