On Tuesday, 20 September 2016 at 12:35:18 UTC, Basile B. wrote:
The problem is here:
https://github.com/BBasile/iz/blob/master/import/iz/math.d#L849
- f(x,c) = 1.0 - pow(1.0 - pow(x, 2.0/c), c * 0.5);
- c(f0.5)) = ?

Which means that I ask you if you can isolate c for

y = 1.0 - pow(1.0 - pow(0.5, 2.0/c), c * 0.5);

y is always f(0.5,c)

Forget to say yesterday that actually the original equation is

x = pow(cos(angle), 0.25*c);
y = pow(sin(angle), 0.25*c);

But I couldn't use this form.

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