Re: Multiple reference to an object in a Database !!

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Marcus Barnes (marcus++at++multigen.com)
Thu, 10 Oct 1996 09:56:21 -0700

On Oct 9, 1:26pm, ram munjulur wrote:
> Subject: Multiple reference to an object in a Database !!
> Hi guys :
>
> If we have a forest full of trees in the database, and all trees
> being the same *.flt (tree.flt) file, is there a LOADER that doesn't
> load each tree.flt, instead creates instances from the first
> tree.flt that was loaded ??

The OpenFlight loader already does instancing of external references in this
way. The first external reference to a .flt file is remembered and
arrangements are made to correctly pfClone any subsequent references during the
_same_ invokation of pfdLoadFile_flt().

The only way a subsequent reference will be loaded from disk again is if the
referencing file overrides one or more of its palettes in a unique combination.

If you set your pfNotifyLevel to PFNFY_DEBUG, the loader will tell you when it
loads or references a file.

PS: It may appear that each instance is real because pfFlatten is called in the
loader by default (disable with pfdConverterMode( "flt", PFFLT_FLATTEN, FALSE
))

Regards.

--
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