Hi Stefano,
Stefano Bettelli wrote:
>
> This is a list of remarks which I accumulated in the last two weeks.
>
> -> A few words on OPENGL support in version 2.23.04:
>
> 1) The GL.C macro never comes with the standard distribution;
> I had it once from a roottalk post and I never changed it, but I
> think it should be provided along with the distribution,
> maybe with a different name (GL.C.example) and some documentation
> lines into it. I never found a note in the installation notes
> which spoke about this script.
Thanks for reporting this missing file in the Linux6.0 distribution.
I have now fixed the problem.
The GL.C file missing (to be copied into $ROOTSYS/macros/GL.C is:
{
gSystem.Load("/usr/X11R6/lib/libXmu.so");
gSystem.Load("$OPENGL/lib/libMesaGL.so");
gSystem.Load("$OPENGL/lib/libMesaGLU.so");
gSystem.Load("$ROOTSYS/lib/libRGL.so");
}
>
> 2) The installation notes don't explain very well how to setup
> ROOT for a compilation with OPENGL. Keep in mind that most Linux
> boxes use the Mesa library which puts its libraries and header
> files in standard places; therefore the correct sequence is:
> > cd $ROOTSYS
> > mkdir opengl
> > cd opengl
> > ln -s /usr/include include
> > ln -s /usr/lib lib
> insted of: (stated in AA_INSTALL)
> > cd $ROOTSYS
> > ln -s <pathname>/Mesa-2.2 opengl (Mesa 2.2 or higher)
Here, I disagree. The procedure as described in AA_INSTALL is correct.
Your Mesa directory should contain an include directory.
>
> 3) I have found that in the new release, if a pad is not editable,
> then you cannot use OPENGL functions (I mean you can open the
> view window, but you can't rotate, zoom, go to wireframe mode ...).
> Moreover, it is the current pad (i.e. the pad with the current
> focus) which must be not editable, and not the pad from which the
> OPENGL view originates. If, after having spawned the view, you click
> onto a non-editable pad, you lock the view. This is very annoying
> if you have, say, two pads, one with pictures and one with buttons.
> If the action graphic_pad->x3d("OPENGL") is issued by pushing a
> button in the former pad (which AFAIK must be not-editable), then,
> whatever pad you cd in the action, after the view is spawned the
> control goes back to the button pad and the view is locked.
> Luckily for me I use a script with a global TTimer, so I can
> circumvent the problem, but I think it is not that good to lock
> also the OPENGL view for non-editable pads.
I will investigate this problem, thanks for mentionning the problem.
>
> -> The compilation stage goes smooth after Fons suggested to patch
> 2.23.04's $ROOTSYS/src/Make-macros line:
> "$(SOFLAGS)" libX3d.$(SOEXT) $@ "$(X3DO)" into
> "$(SOFLAGS)" libX3d.$(SOEXT) $@ "$(X3DO) $(X3DDO)"
> so I think you can add change RedHat 6.0 into RedHat 6.0/6.1
> in the availability page. The only thing which I can't get
> working is "true type fonts" which didn't work from the very
> beginning of my ROOT experience.
>
This was already fixed.
> -> About the benckmark I provided: I made some investigation about my hard
> disk (FUJITSU MPC3102AT E, ATA DISK) and I found that the benchmark
> could be far from truth (so, maybe better if you remove it).
> -> the disk should be 10.2 Gb but it is recognized as 9.6 Gb
> -> the driver reports 0Kb for cache, although the specs say 256Kb.
> but I found a post in a newsgroup stating that these disk
> actually lie about their cache (the cache is there, but they
> state it has zero size).
> -> benchmarking disk-writes with "hdparm -tT" I found a transfer
> rate of 6-7Mb/s; after playing with hdparm parameters I could
> achieve 10-11Mb/s and the ROOTMARKS went up from 133 to >150.
> specs anyway say that the disk transfer rate should be 12-19Mb/s !!!
OK, I will remove your benchmark. After all, that is where benchmarks
are useful !
You must have a serious problem with your Compaq Deskpro EP
A Pentium III 450Mhz system with 64 Mb of memory. Even the CPU
performance
looks very bad (much inferior to my Pentium II 400 Mhz)
Rene Brun
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