Hi Ramy,
Hi Jean, I am looking now at the osgUtil::optimizer and trying to figure out
what options to use, but I do call optimizer with default options after I load
my scene. I don't mind keeping the geometry data but textures take a huge
space in memory while loading them and they need to go as soon as they go on
GPU, there is no point in keeping them.
The default options already apply this, as you've seen (the drop in
memory usage right before the first frame).
The optimizer option you need to enable is OPTIMIZE_TEXTURE_SETTINGS,
but the DEFAULT option already contains this, as you can see from the
osgUtil::Optimizer::OptimizationOptions enum:
enum OptimizationOptions
{
FLATTEN_STATIC_TRANSFORMS = (1 << 0),
REMOVE_REDUNDANT_NODES = (1 << 1),
REMOVE_LOADED_PROXY_NODES = (1 << 2),
COMBINE_ADJACENT_LODS = (1 << 3),
SHARE_DUPLICATE_STATE = (1 << 4),
MERGE_GEOMETRY = (1 << 5),
CHECK_GEOMETRY = (1 << 6),
MAKE_FAST_GEOMETRY = (1 << 7),
SPATIALIZE_GROUPS = (1 << 8),
COPY_SHARED_NODES = (1 << 9),
TRISTRIP_GEOMETRY = (1 << 10),
TESSELLATE_GEOMETRY = (1 << 11),
OPTIMIZE_TEXTURE_SETTINGS = (1 << 12),
MERGE_GEODES = (1 << 13),
FLATTEN_BILLBOARDS = (1 << 14),
TEXTURE_ATLAS_BUILDER = (1 << 15),
STATIC_OBJECT_DETECTION = (1 << 16),
FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS = (1
<< 17),
INDEX_MESH = (1 << 18),
VERTEX_POSTTRANSFORM = (1 << 19),
VERTEX_PRETRANSFORM = (1 << 20),
DEFAULT_OPTIMIZATIONS = FLATTEN_STATIC_TRANSFORMS |
REMOVE_REDUNDANT_NODES |
REMOVE_LOADED_PROXY_NODES |
COMBINE_ADJACENT_LODS |
SHARE_DUPLICATE_STATE |
MERGE_GEOMETRY |
MAKE_FAST_GEOMETRY |
CHECK_GEOMETRY |
OPTIMIZE_TEXTURE_SETTINGS |
STATIC_OBJECT_DETECTION,
ALL_OPTIMIZATIONS =
FLATTEN_STATIC_TRANSFORMS_DUPLICATING_SHARED_SUBGRAPHS |
REMOVE_REDUNDANT_NODES |
REMOVE_LOADED_PROXY_NODES |
COMBINE_ADJACENT_LODS |
SHARE_DUPLICATE_STATE |
MERGE_GEODES |
MERGE_GEOMETRY |
MAKE_FAST_GEOMETRY |
CHECK_GEOMETRY |
SPATIALIZE_GROUPS |
COPY_SHARED_NODES |
TRISTRIP_GEOMETRY |
OPTIMIZE_TEXTURE_SETTINGS |
TEXTURE_ATLAS_BUILDER |
STATIC_OBJECT_DETECTION
};
Hi hybr, Texture compressions might seem like a good idea but I will have to do
a lot of preparation work to switch to using compressed textures. It its one of
my backup plans :).
You don't need to change anything to use compressed textures. If you
already use osgconv to optimize your models and convert them to .ive for
faster loading, just pass --compressed on the command line, and it will
compress the textures using ARB compression before embedding them into
the .ive file. You can experiment with the other --compressed-* options,
but ARB compression should already help a lot.
Hope this helps,
J-S
--
______________________________________________________
Jean-Sebastien Guay [email protected]
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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