Subject:
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Re: Simple Maths Help Needed
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Newsgroups:
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lugnet.cad.dev
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Date:
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Sat, 4 Feb 2006 23:43:03 GMT
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Viewed:
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6763 times
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In lugnet.cad.dev, Tore Eriksson wrote:
> I'm ashamed to admit, but I have got stuck in a quite simple Maths problem.
> It's all about an implementation of the basic formula y=kx+m, but somehow I have
> managed to think the wrong way. Luckily, I made problems like this in a glanse
> back in school...
>
> Background; I wish to create a Tweening command.
> For example:
> Object.Tween Object.Progress from to start_value end_value
> Minifig01.LeftArm.Angle.Tween Minifig01.Progress 0 0.25 0 40
> ...where Minifig01.Progress is the given x value and from and to is the other x
> values corresponding to start_value and end_value on the y-axis.
>
> So, at the from value Progress=0, we read start_value=0 degrees.
> When Progress reaches the end_value=0.25, we get 40 degrees.
> At Progress=0.125, the angle=20 deg's.
>
> This is very simple, I know, but I insist on doing it wrong every time!
> So, I have to humble myself and ask for the formula for this quite basic
> implementation.
I think what you want is:
value = start_value + ((end_value - start_value) * (Progress - from) / (to -
from))
HTH
ROSCO
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 | | Simple Maths Help Needed
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| I'm ashamed to admit, but I have got stuck in a quite simple Maths problem. It's all about an implementation of the basic formula y=kx+m, but somehow I have managed to think the wrong way. Luckily, I made problems like this in a glanse back in (...) (21 years ago, 4-Feb-06, to lugnet.cad.dev)
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