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Automatically exported from code.google.com/p/markers-for-android
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pressure sensitive drawing not working #3

Closed GoogleCodeExporter closed 8 years ago

GoogleCodeExporter commented 8 years ago 
What steps will reproduce the problem?
1. Draw a line alternating hard and soft
2. Note that the line is one width.
3.

What is the expected output? What do you see instead?
I was expecting varying width lines.

What version of the product are you using? On what operating system?
Kindle fire running Android 4.0.4 and sane results from HTC inspire running 
same Android 4.0.4.

Please provide any additional information below.

Original issue reported on code.google.com by kurt.pl...@gmail.com on 27 Jun 2012 at 5:34

GoogleCodeExporter commented 8 years ago 
Sane results or same results?

If your device reports pressure at all, Markers will automatically calibrate 
itself to use it, though this takes some time. Please do some more scribbling 
on your Fire and Inspire (like, doodle for a solid minute or two) and see if 
the pressure response becomes more apparent.

Alternatively, choose "Debug" from the overflow menu and take a look at the 
pressure values coming from the touchscreen; from here you should be able to 
tell whether there is any usable pressure data at all.

Original comment by dan.sandler on 3 Jul 2012 at 12:41

GoogleCodeExporter commented 8 years ago 
Can I reply here?  So I had tried the debug mode.  I assume it is the F#
(ie F 0.2500) that indicates the amount of force.  That number never
changes.  It is always F 0.2500.  I did play with it for a while to see if
it would learn or calibrate but it never did.  I did learn that the app
handles multi touch, that you can draw with 2 fingers.  I enjoyed that.

For a little more history.  Both my phone and tablet are running beta
versions of Android 4.0.4.  I might thing the problem lies with the touch
screen drivers.  But I was surprised that both devices exhibited the same
exact problem.

Original comment by kurt.pl...@gmail.com on 3 Jul 2012 at 9:10

GoogleCodeExporter commented 8 years ago 
Uh, "beta versions"? From where?

Original comment by dsand...@google.com on 3 Jul 2012 at 9:22

GoogleCodeExporter commented 8 years ago 
http://forum.xda-developers.com/showthread.php?t=1528024 for the kindle.  I
would say focus on that one since that is where I do my drawing.  The
inspire was for verifying that I wasn't crazy.

Original comment by kurt.pl...@gmail.com on 3 Jul 2012 at 9:26

GoogleCodeExporter commented 8 years ago 
It's possible that neither of these devices has pressure. I'm not terribly 
surprised about the Fire; I'm terribly surprised about the Inspire. What's the 
Debug mode say on that device? 

(F = "finger"; it switches to "S" if you have an active digitizer attached)

Original comment by dan.sandler on 4 Jul 2012 at 12:49

GoogleCodeExporter commented 8 years ago 
on the inspire it says F 1.0000.  What is an active digitizer?

Original comment by kurt.pl...@gmail.com on 4 Jul 2012 at 12:51

GoogleCodeExporter commented 8 years ago 
after googling that question it would appear that you are right.  The
kindle fire does not have pressure sensitivity.  What are you using that
does have a pressure screen?  Do you think the Nexus 7 does?  I bought the
fire as a stop gap until the then asus tablet/now Nexus 7 tablet came out.

Also I am not surprised that the inspire does not have touch sensitivity
now that I know it is a feature rather than a common attribute.  It is a
nice phone but not the top of the line.

Original comment by kurt.pl...@gmail.com on 4 Jul 2012 at 1:01

GoogleCodeExporter commented 8 years ago 
If the F-value remains 1.0000 no matter what, then, yes, the Inspire lacks 
pressure support…at least in that ICS beta. 

Most Android devices have some pressure support; you seem to have gotten 
particularly unlucky to have two that do not. Just wrote up a wiki page about 
this (DeviceSupport), check that out.

The Nexus 7 definitely has well-tuned pressure support; Markers was used as a 
benchmark very early in Nexus 7's development. :)

Original comment by dan.sandler on 4 Jul 2012 at 1:03

GoogleCodeExporter commented 8 years ago 
Yeah I'm going to get me the N7.  Thanks for looking into this for me. I
have to roll my phone back to CM7 for a bit so I can use the video camera.
 I will try Markers then and see if it is something related to my current
OS or to the phone's hardware.  I will let you know.

Original comment by kurt.pl...@gmail.com on 4 Jul 2012 at 5:29

GoogleCodeExporter commented 8 years ago 
Galaxy S3 also does not support pressure sensitivity

Original comment by bren...@tinyroar.com on 9 Jul 2012 at 8:15

GoogleCodeExporter commented 8 years ago 
It does, but you need to be patient. Apparently it reports pressure values in a 
very narrow range, and it takes Markers a minute or two of continuous doodling 
for it to acclimate properly.

Original comment by dan.sandler on 9 Jul 2012 at 8:23

GoogleCodeExporter commented 8 years ago 
See http://code.google.com/p/markers-for-android/wiki/DeviceSupport where I've 
captured the data you guys have provided. Thanks!

Original comment by dan.sandler on 23 Nov 2012 at 4:01