[Radiance-general] perlin noise

[Jack de Valpine]

Hi Xian,

Actually dirt.cal uses the fractal noise function: fnoise3(x,y,z). The 
Perlin noise function is noise3(x,y,z). You can look in dirt.cal to see 
how the function is used there and in rayinit.cal for library functions 
that are available. There are also additional functions: noise3x(x,y,z), 
noise3y(x,y,z) and noise3z(x,y,z). As I understand from RwR these 
represent the partial derivative of the Perlin noise function at the 
point (see RwR page 253).

Regards,

-Jack de Valpine

Yun-Xian Ho wrote:
> Hi,
>
>
> I am using the dirt.cal function to generate Perlin noise, but I would 
> like to make a different noise pattern for each image given the same 
> A1 parameter. How do I do this?
>
> Thanks!
>
> --xian
>
>
>
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-- 
# Jack de Valpine
# president
#
# visarc incorporated
# http://www.visarc.com
#
# channeling technology for superior design and construction

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