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Hello!
I am having problems with my maths here.
I need a function f(index) that for my index going from 0 to 100 (so it's:
0,1,2,3,4...99,100) returns the values between 0.5 and 5 for index between
0 and 50 and then between 5 and 0.5 back again for index between 50 and
100.
So the return value goes for example 0.5, 0.7, 1, 1.3...5, 4.8,4.2....0.5
Thank you very much!
Greetings,
Chrisir
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function (x) { 5-4.5*abs(x-50)/50 }
I think...
--
Tek
http://evilsuperbrain.com
"Chrisir" <nomail@nomail> wrote in message
news:web.45317c2b6ccf04ff15b159e0@news.povray.org...
>
>
> Hello!
>
> I am having problems with my maths here.
>
> I need a function f(index) that for my index going from 0 to 100 (so it's:
> 0,1,2,3,4...99,100) returns the values between 0.5 and 5 for index between
> 0 and 50 and then between 5 and 0.5 back again for index between 50 and
> 100.
>
> So the return value goes for example 0.5, 0.7, 1, 1.3...5, 4.8,4.2....0.5
>
> Thank you very much!
>
> Greetings,
>
> Chrisir
>
>
>
>
>
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"Chrisir" <nomail@nomail> wrote:
>I need a function f(index) that for my index going from 0 to 100 (so it's:
>0,1,2,3,4...99,100) returns the values between 0.5 and 5 for index between
>0 and 50 and then between 5 and 0.5 back again for index between 50 and
>100.
f(x) = 5 - 0.09 * abs(x - 50)
Best regards,
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Or if you want a nice curve:
function (x) { 5 - 2.25*cos(pi*x/50) }
--
Tek
http://evilsuperbrain.com
"Tek" <tek### [at] evilsuperbrain com> wrote in message
news:453194c0@news.povray.org...
> function (x) { 5-4.5*abs(x-50)/50 }
>
> I think...
>
> --
> Tek
> http://evilsuperbrain.com
>
> "Chrisir" <nomail@nomail> wrote in message
> news:web.45317c2b6ccf04ff15b159e0@news.povray.org...
>>
>>
>> Hello!
>>
>> I am having problems with my maths here.
>>
>> I need a function f(index) that for my index going from 0 to 100 (so
>> it's:
>> 0,1,2,3,4...99,100) returns the values between 0.5 and 5 for index
>> between
>> 0 and 50 and then between 5 and 0.5 back again for index between 50 and
>> 100.
>>
>> So the return value goes for example 0.5, 0.7, 1, 1.3...5, 4.8,4.2....0.5
>>
>> Thank you very much!
>>
>> Greetings,
>>
>> Chrisir
>>
>>
>>
>>
>>
>
>
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