RE: Texture Mapping

Dear Akira,
[snip]
> SkyViewer
> http://lambda.gsfc.nasa.gov/toolbox/tb_skyviewer_ov.cfm
> is the basic idea of my application.

I would like to call your attention that package in question, namely sky_viewer uses QGLViewer class.

http://lambda.gsfc.nasa.gov/toolbox/tb_skyviewer_ov.cfm#requires

This class *is* included into the QtRoot extension. http://root.bnl.gov/QtRoot/htmldoc/TQtGLViewerWidget.html

This means as soon as you use QtRoot-plugins, you can use that application directly from within your ROOT application / macros..

The current version of QGLViewer included into QtRoot distribution is 2.2.1.
I see no problem to upgrade to 2.2.4 if needed. Let me know.

Hope this helps.

Valeri
[snip]

> Its main feature is to plot FITS
> HEALPix image using OpenGL texture mapping. But it has no function to
> analyze cosmic gamma ray images. That's why I am interested in
> implementing more powerful viewer.
>
> Of course, if ROOT supports my requirement officially in a month as
> you wrote, I will move to official classes.
>
> Thank you so much.
>
> Regards,
>
> OKUMURA, Akira oxon_at_ceres.phys.s.u-tokyo.ac.jp
> Department of Physics, The University of Tokyo
> 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
> TEL/FAX +81 3-5841-4173/4059
> Skype : okumura.akira
>
> On 2008/05/26, at 7:50, Matevz Tadel wrote:
>
> > Hi Akira,
> >
> > OKUMURA, Akira wrote:
> >> Hello ROOTers,
> >> I would like to show a sphere of which surface is a texture mapping
> >> of an all-sky image of cosmic gamma rays. Is there any ROOT
> >> function to create such sphere using OpenGL? If not, which ROOT
> >> classes are good starting point?
> >
> > Support for textures in OpenGL is in our development plan but hasn't
> > very high priority at the moment. If you express keen interest for
> > it we could start working on that in about 3 weeks and have
> > something in about a month.
> >
> > After that implementing a textured-sphere will be breeze.
> >
> > If you know ROOT OpenGL well, something could be done even without
> > central support for textures by implementing a pair of classes,
e.g.:
> > TTexturedSphere - holding the image data and sphere parameters;
> > TTexturedSphereGL - doing actual rendering.
> >
> > This paper/talk should give you the general idea:
> >
>

http://indico.cern.ch/contributionDisplay.py?contribId=445&sessionId=28& co
> nfId=3580
> >
> > I can help you prepare the skeleton classes and basic functionality
> > in about a week's time. Let me know what's your time-scale and
> > desired involvement for the task.
> >
> > I also have two questions :)
> >
> > 1. What is your image format and size?
> >
> > 2. Is it a single texture in Mercator projection or you have several
> > images that need to be applied (usually 6, one for each side of an
> > encompassing cube)?
> >
> > Best regards,
> > Matevz
> >
> >> I know that OpenGL itself has functions to handle texture mapping
> >> but I am not an expert of OpenGL. So I am wondering if I can easily
> >> access OpenGL's texture mapping via ROOT system.
> >> Regards,
> >> OKUMURA, Akira oxon_at_ceres.phys.s.u-tokyo.ac.jp
> >> Department of Physics, The University of Tokyo
> >> 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033
> >> TEL/FAX +81 3-5841-4173/4059
> >> Skype : okumura.akira
> >> </div>
Received on Thu May 29 2008 - 21:23:31 CEST