Ooops .... I remember seeing these effects with XFree86/DRI during the pre-4.3 development phase then hardware-T&L was enabled on a Radeon9100 card. Did your experiment at least serve the goal to increase the frame rate on the O2 ?
It looks like it did increase the framerate.
But since this happens both for VBO's (Linux) and DLists (IRIX) I suspect there is a problem somehwere hidden deeper down.
Did you generate a patch against stock FlightGear that affects XFree86/DRI so we can have a try on a Linux box ? Do you have an IRIX binary available that I can test against the MGRAS board ?
Binary via PM.
for SimGear/simgear/scene/tgdb
Index: leaf.cxx =================================================================== RCS file: /var/cvs/SimGear-0.3/SimGear/simgear/scene/tgdb/leaf.cxx,v retrieving revision 1.2 diff -p -u -r1.2 leaf.cxx --- a/leaf.cxx 28 May 2003 19:02:43 -0000 1.2 +++ b/leaf.cxx 17 Feb 2004 10:39:25 -0000 @@ -250,7 +250,7 @@ ssgLeaf *sgMakeLeaf( const string& path,
// lookup the state record
- leaf->setState( state ); + //leaf->setState( state );
if ( calc_lights ) {
if ( coverage > 0.0 ) {
@@ -263,5 +263,8 @@ ssgLeaf *sgMakeLeaf( const string& path,
}
}+ leaf->makeDList();
+ leaf->setState( state );
+
return leaf;
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