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"Bald Eagle" <cre### [at] netscape net> wrote:
> Here's a dispersion pattern I found that seems to also make a good wood ring
> pattern.
>
> https://en.wikipedia.org/wiki/Dispersion_(water_waves)#Dispersion_relation
> https://www.desmos.com/calculator/dzrqmexxik
>
> #declare T_wave = 0.5; // -10 to 10 in example
> #declare FWave1 = function {sum (k_wave, 0.3, 3, mod ( (sqrt(x*x+y*y) - sqrt
> (9.81*k_wave*3)*T_wave)*k_wave*3, 2*pi) <= 1)}
> #declare FWave2 = function {sum (k_wave, 0.3, 3, abs ( (sqrt(x*x+y*y) - sqrt
> (9.81*k_wave*3)*T_wave)*k_wave*3) <= 0.3)}
> #declare Formula201 = function {(FWave1 (x, y, z) + FWave2 (x, y, z))/2}
>
> plane {z, 0 pigment {function {Formula201 (x,y,z)} } }
>
> Add 2 different color maps for light and dark wood, and it should look a lot
> better.
I see this idea describing...
"when annual ring pattern is not very clear"
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"And" <49341109@ntnu.edu.tw> wrote:
> I see this idea describing...
> "when annual ring pattern is not very clear"
I just posted it to show that there are a lot of functions out there, and we can
mix and match them to eventually get the final result that we're looking for.
Whereas some base patterns may be well suited to modification and perturbation
in certain ways, others may not be.
So I think that at the present, in the absence of anything concrete, it's good
to compile a list of options, and then see what the strengths and weaknesses of
them are, and proceed from there.
And at some future point, someone may find it useful for some thing that's - not
wood.
- BE
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"Bald Eagle" <cre### [at] netscapenet> wrote:
> "And" <49341109@ntnu.edu.tw> wrote:
>
> > I see this idea describing...
> > "when annual ring pattern is not very clear"
>
> I just posted it to show that there are a lot of functions out there, and we can
> mix and match them to eventually get the final result that we're looking for.
>
> Whereas some base patterns may be well suited to modification and perturbation
> in certain ways, others may not be.
>
> So I think that at the present, in the absence of anything concrete, it's good
> to compile a list of options, and then see what the strengths and weaknesses of
> them are, and proceed from there.
>
> And at some future point, someone may find it useful for some thing that's - not
> wood.
>
> - BE
Well.
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