Re: [ROOT] TPGON and OpenGL - X3D and Shift interface

From: Rene Brun (Rene.Brun@cern.ch)
Date: Wed Nov 17 2004 - 08:57:27 MET


Hi Christian,

Christian Holm Christensen wrote:
> 
> Hi Again,
> 
> On Tue, 2004-11-16 at 16:18 +0100, Rene Brun wrote:
> > Christian,
> >
> > I cannot comment on Castor. The installation procedure works OK on Unix systems
> > and Windows. This is OK.
> 
> I think I didn't make myself clear:  Where do I get the source code for
> the SHIFT libraries ROOT requires?  Is is at
> 
>            http://savannah.cern.ch/projects/castor/
> 
> If so, shouldn't the options really be changed to `--with-castor-libdir'
> etc.?

OK, the castor site has changed to a completly new site last week!
The page you are quoting seems to be the right page for downloading Castor.
I have updated the link on our installation page. I assume that the pointer
to your link is obsolete too.
I agree that the configure file should now refer to castor and not rfio.
(Fons, i assume that you will make the change)

> 
> > Concerning TViewerOIV: it is our intention to discontinue the support
> > for this viewer. Our effort is going to TViewerOpenGL. This class provides far
> > more functionality than the old OI viewer.
> 
> OK.  Why not remove the code from CVS, as it's not functional at all?
> 

Yes, as I said, we will remove it at the time of the release.
We are leaving time to react to some previous users who had built theit viewers
based on the OI viewer.

> The new OpenGL viewer is indeed very nice.  A few questions:
> 
>       * However, I really miss the possibility of saving the current
>         scene to a file (.eps, .gif, .jpg, .svg, or what not) - but I
>         guess I'm not the first to raise that point :-) And I'm sure
>         you're dealing with it.

We want to provide the same functionality as we do now with the normal TPad.
We are also considering a TPadGL class that could be embedded in a normal
canvas.

>       * Would it be possible to hide the  light sources too?  Ofcourse,
>         one can simply turn them off, but that removes the light too.

There are still many things to do with the lights. We are currently designing
important extensions to the GL viewer to load dynamically the GL scene
whenever a mouse event is triggered and also giving the possibility to the user
to move around the scene (as opposed to the user rotating the scene).
The lights are somehow connected to this problem.

>       * In the attached script (a simplified version of the the ALICE
>         FMD3 geometry), the XTRU objects are not drawn right when you
>         look from the nose of the support cone, while they look find
>         when viewed from the back of the cone.  When I turn on wireframe
>         display in the OpenGL viewer, I see that the XTRU objects
>         contain more lines than I've defined.  It seems that one of the
>         triangles that make up the XTRU object is `dominating'.

OK, we take note of this problem and will try to fix it before our coming
development release.

> 
> The new Ged classes are very nice too.  A few questions:
> 
>       * I miss the buttons `Ok', `Apply', and `Cancel' (and possibly in
>         `Close') in the pop-ups.
>       * Also, sometimes, the pop-ups do not have a title bar and some
>         times they do.
>       * When enabling the editor, the canvas may be too small to hold
>         the full interface, in which case, one has to turn off the
>         auto-resize option and manually make the canvas larger.  It
>         would be nice if there was a scrollbar instead.

Ilka is currently working on these problems.

Rene Brun

> 
> [I should probably say that I'm using GNOME 2.8 with metacity]
> 
> Yours,
> 
> --
>  ___  |  Christian Holm Christensen
>   |_| |  -------------------------------------------------------------
>     | |  Address: Sankt Hansgade 23, 1. th.  Phone:  (+45) 35 35 96 91
>      _|           DK-2200 Copenhagen N       Cell:   (+45) 24 61 85 91
>     _|            Denmark                    Office: (+45) 353  25 404
>  ____|   Email:   cholm@nbi.dk               Web:    www.nbi.dk/~cholm
>  | |
> 
>   --------------------------------------------------------------------------------
>                        Name: simpleGeometry.C
>    simpleGeometry.C    Type: text/x-c++src
>                    Encoding: 7bit



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