Hello Edmund,
On 10/13/2011 03:51 AM, Edmund Buchal wrote:
> I have a problem with creating geometry and setting transformations form a
> thread in my application.
[SNIP]
> Can somebody help me with this?
The Geometry misses that it has been modified, because there is no call
to commitChanges() in the while loop of rotate(). Therefore it never
gets a chance to mark it's display list as out of data for rendering.
Add a commitChanges() call after the for loop in rotate (around line
203) and it works.
> I also have some questions about threads and aspects:
>
> 1. If i load a model and then call OSG::commitChangesAndClear() in the main
> thread after loading it, can i still make
> changes to the model in a thread using another aspect when i start the
> thread after calling OSG::commitChangesAndClear() in
> the main thread? Or do I have to keep the changelists in the application
> thread and call applicationThread->getChangeList()->applyAndClear()
> from the second thread so the second thread creates the necessary copies of
> the data in its aspect?
when you clear the changelist you loose the information about objects
that were created up to this point, so they will not exist in the aspect
you apply the changes to. You can use ChangeList::fillFromCurrentState()
to fill a changelist with the entries that lead to the current state of
the aspect.
> 2. Are only the field containers which are changed by the second thread
> duplicated or is the whole scene duplicated? My scene has about 900MB
> when loaded, so duplicating the whole thing in the second aspect is not
> really an option...
the whole scene is duplicated, but MFields share the actual storage
until they are modified in one aspect. So while there are two instances
of every FieldContainer object, most of the memory intensive data
(textures, geometry) is shared.
Cheers,
Carsten
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