[Radiance-general] perforate.cal

[Gregory J. Ward]

The U and V values defined in rayinit.cal will work for planar surfaces 
of any orientation, but will not work for curved surfaces or meshes.  
For these, you need to define a local (u,v) mapping and apply Lu and Lv 
on a mesh surface as Guilio suggests, or else come up with an 
approximation plane that will work and use that by rotating your 
function.  You can always rotate any .cal function to another 
orientation by adding transform arguments (-rx, -ry, -rz) to the 
mixfunc primitive that references it.

-Greg

> From: atelier iebele abel <atelier at iebele.nl>
> Date: April 13, 2005 7:17:56 AM PDT
>
> Hi group,
>
> I use a file called perforate.cal (from Georg).
> Is it possible to change this file in such way that use it on surfaces 
> which various normal directions ( not only through x, y or z plane) ?
>
> -Iebele