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Exploring Apple's 3D Touch

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Re: Exploring Apple's 3D Touch

#12
post #10

I'm wondering: can it measure force also for different presses simultaneously? And how far apart do the presses need to be?

In my experience so far, yes, it will provide unique force values per-touch, though I'm not sure if the quality deteriorates, or at what point it might deteriorate.

I don't know how far apart the presses need to be, as I haven't done a "two fingers as close as possible" test yet.

Re: Exploring Apple's 3D Touch

#13
post #7

@freino made a web-based 3D-touch demo that prints the value in question, however the javascript DOM attribute has values between 0 and 1, not 0 and 6.666667. Check it out with an iPhone 6s/6s+ at http://freinbichler.me/apps/3dtouch/

Yep, I'm seeing the same thing -- a DOM attribute with values between 0 and 1. Interesting.

Re: Exploring Apple's 3D Touch

#14

and to think there was an api to derive pressure from contact size back in 2.0 https://developer.apple.com/library/ios/documentation/UIKit/... anyone knows any app usage of this? I remember some games had pressure calculated from the accelerometer, don't know if any did use this one instead.

I would love to see how closely/consistently the output from "contact size" increases with "force"

Re: Exploring Apple's 3D Touch

#15
post #14

and to think there was an api to derive pressure from contact size back in 2.0 https://developer.apple.com/library/ios/documentation/UIKit/... anyone knows any app usage of this? I remember some games had pressure calculated from the accelerometer, don't know if any did use this one instead.

I would love to see how closely/consistently the output from "contact size" increases with "force"

I don't think is gonna be consistent among different fingers/people, sadly. but synaptic did pressure sensitivity on contact area long ago, wouldn't be surprised if they got some nice normalization heuristic already going.

edit this is funny coincidence: the dev guide for synaptic says 255 level but better badn in 7 levels at most

(2005) http://arstechnica.com/civis/viewtopic.php?f=9&t=352584

Edit: I know those are not really comparable teches, force touch for one is transparent

Re: Exploring Apple's 3D Touch

#16
post #14

and to think there was an api to derive pressure from contact size back in 2.0 https://developer.apple.com/library/ios/documentation/UIKit/... anyone knows any app usage of this? I remember some games had pressure calculated from the accelerometer, don't know if any did use this one instead.

I would love to see how closely/consistently the output from "contact size" increases with "force"

This sort of thing really depends on the application, and the nice feature provided with the new "force" property is that you can actually distinguish between a "whole finger pad" light touch, and a "thin, firm, almost just the finger nail" hard touch, and most things in betwee.

Re: Exploring Apple's 3D Touch

#17
Wondering how the 3d touch changes the cross platform development!?

What happens when a developer has 2 different actions for a long press and pressured (3d touch) press!?

I have trouble understanding the usability pov for the 3d touch! Do we really need it?

Re: Exploring Apple's 3D Touch

#18

and to think there was an api to derive pressure from contact size back in 2.0 https://developer.apple.com/library/ios/documentation/UIKit/... anyone knows any app usage of this? I remember some games had pressure calculated from the accelerometer, don't know if any did use this one instead.

That was a private API -- not sure what Apple used it for, since GarageBand was using accelerometer from what I could tell.
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