[Radiance-general] water simulation

[Gregory J. Ward]

Hi Ignacio,

Regrettably, I don't have time to debug your function file at the  
moment.  You can try using the debugcal script that comes with  
Radiance, giving it ray origins and directions on the standard input  
or using ximage:

	ximage test.pic | debugcal test.oct -f water.cal -e '$1=dx;$2=dy; 
$3=dz;$4=dxx;$5=dyy;$6=dzz'

This script assigns the standard variables from rayinit.cal so you  
can find out what is happening.

To answer  your first question, the Rdot variable is the negative dot  
product, meaning that it is positive when a ray strikes the front of  
a surface material, and negative when it strikes the back side of the  
surface.

Hope this helps.
-Greg

> From: Ignacio Munárriz <info at aisarquitectura.com>
> Date: May 11, 2006 5:13:43 AM PDT
>
> Thanks Greg, i think i'm near to get it, but there is something  
> that is not
> working, i dont know if Rdot is the DOT product or the -DOT  
> product, i tried
> the two but it is still not working, i´ve been trying to do some  
> tests with
> calc and it seems to work but something must be wrong because rpict  
> gives
> the aiming error, what is the best tool in radiance to test this  
> kind of
> things, i say, testing cal files while sending rays