It looks like SharedStateManager is appropriate for what I'm doing,
but it doesn't seem to be quite as flexible as I'd like. With the
wide variety of modelers, exporters, and loaders, I can't always be
assured that the DataVariance on StateSets and Textures will be
static. This is currently a requirement for sharing, though.
The current share modes are
enum ShareMode
{
SHARE_NONE = 0x00,
SHARE_TEXTURES = 0x01,
SHARE_STATESETS = 0x02,
SHARE_ALL = SHARE_TEXTURES |
SHARE_STATESETS
};
Would it be too weird to append these modes like so?
enum ShareMode
{
SHARE_NONE = 0x00,
SHARE_TEXTURES = 0x01,
SHARE_STATESETS = 0x02,
SHARE_ALL = SHARE_TEXTURES |
SHARE_STATESETS,
SHARE_TEXTURES_DYNAMIC = 0x04,
SHARE_TEXTURES_UNSPECIFIED = 0x08,
SHARE_STATESETS_DYNAMIC = 0x10,
SHARE_STATESETS_UNSPECIFIED = 0x20
};
I've already tried it with textures and it helps out a lot when you
can't easily control what's in your model files; I can submit it if
this looks good.
The only problem I see is that SHARE_ALL no longer makes much sense,
but changing it would break backward compatibility. And it would look
weird to have SHARE_ALL_NO_REALLY_SHARE_ALL.
- Terry
>
> Message: 11
> Date: Fri, 27 Jun 2008 09:32:15 +0100
> From: "Robert Osfield" <[EMAIL PROTECTED]>
> Subject: Re: [osg-users] multiple models, single texture
> To: "OpenSceneGraph Users" <osg-users@lists.openscenegraph.org>
> Message-ID:
> <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi Terry,
>
> On Fri, Jun 27, 2008 at 5:01 AM, Terry Welsh <[EMAIL PROTECTED]> wrote:
>> Is it possible to load multiple model files that use the same texture
>> but only have the texture get loaded once? It seems like a good way
>> to save memory and reduce state changes.
>
> The loaders don't cache images and textures, but it is possible to
> combine duplicate state once the data is loaded. The
> osgUtil::Optimize::RemoveDuplicateState can be used on a whole scene
> graph, and the osgDB::SharedStateManager can be used when you are
> incrementally loading subgraphs.
>
> Robert.
>
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