[Radiance-general] Re: Radiance Vs Viz

[Giulio Antonutto]

Goooongggg! Goooongggg! 
(the sound of temple gong...)


-----Original Message-----
From: radiance-general-bounces at radiance-online.org
[mailto:radiance-general-bounces at radiance-online.org]On Behalf Of Greg
Ward
Sent: 19 May 2004 17:05
To: Radiance general discussion
Subject: [Radiance-general] Re: Radiance Vs Viz


Another P.S...  Following the quoted conversation from Pillo, I went 
off and improved the material handling for sources (and virtual 
sources) so that it does look up the modifier tree past patterns and 
things that might come between the material primitive and the object.  
(If you understood that last sentence, you're probably in the top 2% of 
this class.)  However, the code still isn't smart enough to consider 
mixfunc's that make material assignment as part of ray evaluation, 
which is basically incompatible with a priori assessments of which 
surfaces are considered light sources and which surfaces aren't.  In 
other words, don't expect me to fix this anytime soon.

If you are trying to reflect objects in a surface, the "mirror" 
primitive allows you to specify any alternate material you choose when 
it is not participating in the virtual source calculation.  This should 
be enough to do what you want in most cases.

The Lord of Radiance has spoked.
-Greg

> From: Giulio Antonutto <Giulio.Antonutto at arup.com>
> Date: May 19, 2004 8:10:39 AM PDT
>
from the "Lord":

"That is correct -- Radiance only finds virtual source objects using

  mirror or prism material types directly. It doesn't even look if you

  have a modifier in front of the material in the chain (e.g., you

  reference a pattern before the material)."

 

cheers!


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