* I split the mouse handling from a monolithic method to separate ones, slightly cleaner than a whole bunch of if()'s, especially with another case of the mouse entering the canvas.
* I changed the EVT_KEY_DOWN handler to an EVT_CHAR handler, although that now makes the up and down handler assymetric. The new down-handler returns translated key codes, so when you press the S key (without anything else), it actually returns 's' and not 'S' as the EVT_KEY_DOWN did. This means that statistics can be called up in the viewer window, while the example previously only printed a "Stats output:" line to the console. I'm not truly happy that the up handler returns _untranslated_ key codes. But solving this completely would probably mean adding some table that translated from wxWidgets' untranslated key codes to OSG's internal ones. This might be interesting to add, as anyone using OSG + wxWidgets in any serious manner would also have to add this.
* I commented out the evt.Skip()'s in the keyboard handlers as these would only be necessary if there were some key events that are not handled. But currently all key events are simply forwarded.
* I changed the handling of a mouse drag to a more general mouse move"
multi-threaded paging, where the Pager manages threads of reading local
and http files via seperate threads. This makes it possible to smoothly
browse large databases where parts of the data are locally cached while
others are on a remote server. Previously with this type of dataset
the pager would stall all paging while http requests were being served,
even when parts of the models are still loadable virtue of being in the
local cache.
Also as part of the refactoring the DatabaseRequest are now stored in the
ProxyNode/PagedLOD nodes to facilitate quite updating in the cull traversal,
with the new code avoiding mutex locks and searches. Previous on big
databases the overhead involved in make database requests could accumulate
to a point where it'd cause the cull traversal to break frame. The overhead
now is negligable.
Finally OSG_FILE_CACHE support has been moved from the curl plugin into
the DatabasePager. Eventually this functionality will be moved out into
osgDB for more general usage.
ReaderWriter::ReadResult now has a FILE_REQUEST enum.
ReaderWriter::Options now has a s/getAsynchronousFileReadHint() parameter methods.
libcurl based plugin now detects enabing of the AsynchronousFileReadHint, but
as yet does not handle async requests - handling everything syncronously.
DatabasePager now by default will enable AsynchronousFileReadHint for http
based file requests
There was a problem converting a file to Collada by using osgconv like this:
osgconv file.osg file.dae
You would get an error message:
I/O error : Permission denied
I/O error : Permission denied
error : xmlNewTextWriterFilename : out of memory!
Error: daeLIBXMLPlugin::write(file://cessna.dae) failed
Warning: Error in writing to "cessna.dae".
This was due to some bad URI processing code in the Collada plugin. The attached file fixes this by using the Collada DOM's URI processing functions. After this change the file will convert successfully in the local directory.
"
It might seem odd that the change actually removes the stub apply(Billboard&) method, but it turns out Billboards are easily supported in subordinate routines of the existing apply(Geode&) method with s dynamic_cast, so there's no need for a separate apply(Billboard&)."
