Hi,
Years ago I had a career as a technical illustrator. First analog then digital.
Perhaps the following code I developed back around 1992 might be helpful to you.
H = Horizontal coordinate on picture plane.
V = Vertical coordinate on picture plane.
XYZ = 3D coordinate.
distance = "camera" distance from the model:
a range of values [0..15000] (logrithmic).
height = "camera" height from 0 ground plane.
H := scale * (X * distance / (Y + distance)) + H_offset;
V := scale * ((Z - height) * D / (Y + distance)) + Y_offset;
Thomas Young
330-256-7064
Sent from my iPhone
> On Sep 17, 2019, at 11:20 AM, Mgr. Janusz Chmiel
> wrote:
>
> Please would somebody of us try to tell Me, if Android API functions can
> detect how many fingers have been used to touch The display even while
> Talkback screen reader work ane Explore by touch service is communicating
> with display?
> I do not want to use graphical mode, since it require that Talkback screen
> reader must be turned off. One developer, who have used Java language used
> some technique, which could detect how many fingers have been used to shift
> from down to up. If one or two. Thank you very much for yours tips how to
> detect this specific touch events when Talkback is running.
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