Hello Michael,
On 03/21/2011 02:07 PM, Michael Raab wrote:
> we have some perfomance issues when using OpenSG1.8 in our multi display
> projection environment.
> If the displayed content on the render servers changes, e.g. when moving
> or rotating the camera, drops of the frame rate occur. Seems to me that
> resources that are outside the viewing frustum are released and
> realloced once they get back in frustum. Is that correct?
resources on the GPU (textures, display lists, VBOs etc) are allocated
when needed for the first time, so it is possible that these need to be
uploaded/generated when objects enter the view frustum for the first
time. Unless you are low/out of video memory they should not be pushed
off the GPU though - OpenSG will not remove them unless the objects are
destroyed.
> Do I miss
> something? Do you see something that can improve our situation?
> Hope someone can help.
a simple solution is often to render one frame without frustum culling
to force data uploads. For relatively static scenes (i.e. where there is
a point in time that all/most data is loaded) this is normally sufficient.
Cheers,
Carsten
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