Subject:
|
Re: Simple Maths Help Needed
|
Newsgroups:
|
lugnet.cad.dev
|
Date:
|
Sun, 5 Feb 2006 00:23:06 GMT
|
Viewed:
|
2686 times
|
| |
|
|
In lugnet.cad.dev, Timothy Gould wrote:
> In lugnet.cad.dev, Tore Eriksson wrote:
> > > > 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
> >
> > Oh, how close I was, and yet... Thanks a lot, Rosco!
> >
> > /Tore#
>
> There is another way ;)
>
> (Start_value*(to-Progress)+End_value*(Progress-from))/(to-from)
>
> Is nice and symmetric and more numerically stable.
>
> Tim
Rule #1: Never fix anything that's not broken! :)
I need to make an if statement to take care of the exception where 'to' equals
'from', to avoid a division by zero crash anyway. Who knows what users can bring
up...
/Tore
|
|
Message is in Reply To:
5 Messages in This Thread:
  
- Entire Thread on One Page:
- Nested:
All | Brief | Compact | Dots
Linear:
All | Brief | Compact
|
|
|
|
