Hi all,
During the past days I have done some profiling on flightgear. One final outcome of that work was, that most time is spent in ssg routines (yes, ssg not OpenGL!!). The problems are the huge amount of small leaf nodes we get from the ac file loader. That vertex optimization pass makes this a bit better but there was still room for improovement.
I've tried using display lists again (which didn't work in the past) and on my O2 I get a great improvement (up to 30%, but that only means from 6 fps to 9 fps in my case), but on my Linux machine I get a floating point exception.
Could anyone test it on their Linux machine?
Erik
Index: leaf.cxx
===================================================================
RCS file: /var/cvs/SimGear-0.3/SimGear/simgear/scene/tgdb/leaf.cxx,v
retrieving revision 1.3
diff -p -u -r1.3 leaf.cxx
--- leaf.cxx 17 Feb 2004 14:40:05 -0000 1.3
+++ leaf.cxx 8 Oct 2004 16:32:46 -0000
@@ -250,6 +250,7 @@ ssgLeaf *sgMakeLeaf( const string& path,
// lookup the state record
+ leaf->makeDList();
leaf->setState( state );
if ( calc_lights ) {
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