Is there a way to determine the radius, or edges of where a fingure is touching (maybe in pixels)?
I’d did not seem possible to me, but I figure I’d ask to see if anyone had ideas.
why would you need to do that? plus it would be messed up since everyone has different size fingers.
There is no such information on the device (not a unity thing but the device and screen technology).
Just the nature of capacitive screens, you would need a pen based touch screen with no reasonable finger support for having pressure sensitive information (as the pen is responsible for it, not the screen)
So dreamora, there is no way to get the outline of a thumb? I didn’t think so-- but at the same time, the screen must be able to figure it out somehow in order to get the center of the touch. Whether this is accessible or not, I figured was another story.
The screen can say where the middle is, the capacitive one, thats the position you get for the touch.
Thats why 2 touches next to each other potentially are not detected if the user presses hard, as they cease to exist as distinct touches
I’m trying to understand the capacitie screens hardware wise a little bit. I’m no hardware engineer, but I do undestand that capacitive screens can detect the electrical charge from the finger.
When your finger touches the screen, the electrical charge is transmitted-- is it generally safe to say that the electrical charge transmitted is transmitted from the center of your finger, and that is what the screen reads?
Thanks
-Rob
not needfully center of the finger but from the center of capacity and/or point of first touch
Some windows notebooks have extended drivers that give you “mood feedback” which is basically nothing else than showing you a measure of the electricity visualized with smaller and larger areas and potency lines.
Hi there, take a look at this 
Fernando, I beleive that uses a stylus through bluetooth right? That isn’t quite what I was looking for, but thanks
No prob
In fact, it uses a Pogo Sketch. But maybe if they can read contact area of those, it’s also possible with the fingers.
See ya
At a low level the system sees touches as a blob of area covered by a finger. The system tries to separate these blobs into islands, associate them with previous known positions of islands, reduce the area to a single point and return that point as a touch position. The capacitive screen receives input over surface area, but iOS swallows this information and returns it as single points of touch.
It’s my understanding that the low level capacitive touch information is available on a jailbroken device, or through calling private API’s, but apple doesn’t think that anyone really wants to work with that data and haven’t given us an api to work with it.
Dang, I googled and landed here, hoping for a solution.
Seems not.
I wish to create a paint program with brush of the shape of your finger/thumb.
;(