Re: Math question
Re: Math question
- Subject: Re: Math question
- From: Saagar Jha <email@hidden>
- Date: Tue, 24 Jan 2017 10:52:09 -0800
Not completely sure if this is what you want, but I think your “scale” would be:
scale = (distance - minDistance) / (maxDistance - minDistance) * (maxScale - minScale) + minScale
In this case,
scale = (distance - 100) / 100 * 2 + 1
Saagar Jha
> On Jan 24, 2017, at 10:45 AM, Eric E. Dolecki <email@hidden> wrote:
>
> I have a situation where the distance of an onTouchesBegan in iOS produces
> a scale for an object.
>
> min distance of 100 = scale of 1.0
> max distance of 200 = scale of 3.0
>
> So I am looking for a number between 100 and 200 which ends up being
> between 1.0 and 3.0. I can get the distance easily enough, but the scale
> factor eludes me at the moment. Coffee? Lack of this kind of math for over
> 20 years? Heh.
>
> self.scaleCircle.transform = CGAffineTransform(scaleX: percentage, y:
> percentage)
>
> What math would I apply to get that range?
>
> Eric
> _______________________________________________
>
> Cocoa-dev mailing list (email@hidden)
>
> Please do not post admin requests or moderator comments to the list.
> Contact the moderators at cocoa-dev-admins(at)lists.apple.com
>
> Help/Unsubscribe/Update your Subscription:
>
> This email sent to email@hidden
_______________________________________________
Cocoa-dev mailing list (email@hidden)
Please do not post admin requests or moderator comments to the list.
Contact the moderators at cocoa-dev-admins(at)lists.apple.com
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden
| References: | |
| | >Math question (From: "Eric E. Dolecki" <email@hidden>) |