[Radiance-general] Colordata question!

[Marija Cvetkovic]

Hi,

I have rectangular surface with sensor points organized as a regular 2D
grid. The color of each sensor is defined based on sun exposure data, I
calculate separately (some kind of false-color). With this data I can 
create an image with the surface and sensors on it, where color of 
sensors define the distribution of sun exposure on the surface.
Now, I want to make this representation continual (like the results of
falsecolor program), so I must somehow interpolate the color data from
the sensor points.
My idea is to define the rectangular surface near the original one, made
of plastic with colordata pattern. Colordata takes next form:
mod colordata id
7+n+
rfunc gfunc bfunc rdatafile gdatafile bdatafile
funcfile x1 x2  transform
0
m A1 A2 .. Am

rdatafile gdatafile bdatafile will be defined with my sensor colors.

How should I define rfunc, gfunc, bfunc to enable bilinear or bicubic 
interpolation of color?


Related question:
Are there any example of coloradata definition? I tried to find them in 
the Book and in mail archives, but without success!


Thanks,
Marija