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 <janusz.chm...@volny.cz> > 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. > _______________________________________________ > fpc-pascal maillist - fpc-pascal@lists.freepascal.org > https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
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