Houdini docs says about Mouse CHOP that X and Y channels have range -1 to 1.

But I have channels from 0 in top left corner to few thousands. And it maximum value depend on houdini program window.

How I can get correct range?
And how I get coords independent of window size?

That looks like a bug to me, perhaps broken in the ports to Qt. I would log a bug with your exact screen set up details. It might have something to do with multiple screens and/or high dpi settings.

edward
That looks like a bug to me, perhaps broken in the ports to Qt. I would log a bug with your exact screen set up details. It might have something to do with multiple screens and/or high dpi settings.

Ok, Windows 10, one screen, 2560x1440 res, 96dpi (100% scale in display settings).

Don't tell me, tell them https://www.sidefx.com/forum/topic/15604/ [www.sidefx.com]