real-time animation

radiance-general
1

hi Greg,
thanx for the animation pathh details,i made the animation of my library and
everyone was impressed .
now what i am planning to do is to make that real time i.e. is on the mouse
control or keyboard control a person can move through the library.i want to
know if its possible or not , i mean with review its possible but the
picture quality is not as good as by rpict .
could anyone help me regarding this
gurneet

···

----- Original Message -----
From: "Greg Ward" <gward@lmi.net>
To: <radiance-general@radiance-online.org>
Cc: <radiance-general@radiance-online.org>
Sent: Tuesday, April 01, 2003 11:24 AM
Subject: [Radiance-general] Re: opengl and mac

Hello Genevieve,

I confess to a certain amount of ignorance regarding the OpenGL
implementation under Mac OS X. Are you using the X11 beta server from
Apple with the precompiled Radiance 3.5 binaries? What, precisely, are
you using, on what machine, etc. I might have a better idea if I know
the details, and I might not. Others might if I don't.

-Greg

> From: genevieve lucet <lucet@servidor.unam.mx>
> Date: Mon Mar 31, 2003 4:17:10 PM US/Pacific
> To: radiance-general@radiance-online.org
> Subject: [Radiance-general] opengl and mac
> Reply-To: radiance-general@radiance-online.org
>
> Greg,
> I installed without problem the new version of radiance in my mac and
> use it with X11 ver. 1.03
> commands like "rad -o x11" work fine but all the commands like "glrad"
> that need opengl are not responding.
> As you are a mac user I would like to know if you found a way to
> resolve this problem.
> Thanks. genevieve.

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2

Hi,

There was a short discussion on Intertactive Radiance on this list recently
with the subject "Radiance and VR".
Basically you have two options:
1. Use the Holodeck rholo tools that come with Radiance 3.4+
Advantage:
you get all the reflectance effects that you would get when rendering a
single image.

Disadvantage:
You can only view the scenes with the rholo tools.
Level of interactivity depends on the preprocessing time.

2. Write your own tool that exports VRML with textures or vertex colours
from Radiance:
I worked on that problem a bit last year and gave a presentation at the
Radiance workshop.
http://www.radiance-online.org/radiance-workshop1/cd/Spanlang/index.html
Basically the system uses Radiance to create texture maps (lightmaps) for
all surfaces in the scene. The texture maps
are then converted to jpeg to be interactively rendered in a VRML browser.
In its current state it is only usable by me.
If I had time to implement it again I would probably use the rad2mgf and
mgf2inv tools to convert the
geometry from Radiance to VRML (Inventor).
To avoid texture memory problems it may be better to generate vertex colours
instead of texture maps.

Advantage:
You can view it in any VRML browser and convert it to other formats for
interactive viewing.

Disadvantage:
Only works properly with perfectly diffuse reflecting materials.
Will require some development efforts.

Bernhard