enabling image cache

[Trajce Nikolov NICK]

Hi Community,

I have two different files sharing an image. is there a way to cache (without extra coding) the shared resource? for example

osgviewer file1 file2 

and the image to be loaded once and reused later?

Thanks a bunch as always!

Cheers,

Nick

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trajce nikolov nick

[OpenSceneGraph Users]

HI Nick,

The osgDB::ObjectCache can be used to share loaded data, so if the images are loaded from external files this will ensure the data gets shared.

There is also the utility for sharing state at runtime, but I don't recall it's name.

In each of these cases there is a limit to what it'll figure out as shared, none of them look at the internal data.

In the VulkanSceneGraph I have implemented the ability to place objects that you wish to share into a vsg::Objects container that you can place in an external file, then the model scenes then reference this with the a cache ensuring that the vsg::Object container is only loaded once and shared there after.  The scheme is able to connect all the object IDs together so everything is consistent.  This scheme only works with native VSG scene graphs as they obviously have to know about the scheme.

I mention the VSG approach as it should be possible to do something similar with the OSG, as the OSG has, in principle, most of the required IO features.

Robert.

[Per Nordqvist]

Here is a snippet from osgcatch.cpp:

    // enable the image cache so we don't need to keep loading the particle files
    osgDB::ReaderWriter::Options* options = new osgDB::ReaderWriter::Options;
    options->setObjectCacheHint(osgDB::ReaderWriter::Options::CACHE_IMAGES);
    osgDB::Registry::instance()->setOptions(options);

But I haven't tried it myself.

Regards,

Per

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[OpenSceneGraph Users]

thanks Per !

On Sun, Aug 2, 2020 at 6:10 PM OpenSceneGraph Users <osg-...@lists.openscenegraph.org> wrote:

Here is a snippet from osgcatch.cpp:

    // enable the image cache so we don't need to keep loading the particle files
    osgDB::ReaderWriter::Options* options = new osgDB::ReaderWriter::Options;
    options->setObjectCacheHint(osgDB::ReaderWriter::Options::CACHE_IMAGES);
    osgDB::Registry::instance()->setOptions(options);

But I haven't tried it myself.

Regards,

Per

On Sat, 1 Aug 2020 at 17:05, Trajce Nikolov NICK <trajce.ni...@gmail.com> wrote:

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trajce nikolov nick

[Trajce Nikolov NICK]

Thanks Robert!

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trajce nikolov nick