Picking unpredictable in 1.17

[chris-cooper]

I'm finding 'Drill Down Picking' in the 'Picking' Sandcastle example gives flickering results in 1.17 vs 1.16. I notice another user has reported something on the mailing list which may be related. Tested on Chrome with Intel graphics running Ubuntu 14.04.

[chris-cooper]

I think you can repro what the OP was referring to with the labels example. A single click brings up the green crosshairs in 1.16 but not in 1.17

[pjcozzi]

@bagnell can you look at the drill picking issue (Sandcastle example)? The easiest way to reproduce it is to mouse over the part where all three rectangles overlap. It seems OK when there is not overlap.

[emackey]

This affects selection too: If you load the CZML Sandcastle Demo, you can't single-click the entities to select them.

[ezze]

I faced the same issue in my project after upgrading to 1.17. I do picking vector primitives on left mouse click, and it seems that it works only on the second attempt (at least, it never works on the first click).

[emackey]

git bisect says the first bad commit is 539cf3c.

[pjcozzi]

@emackey fixed this in #3391. @chris-cooper @ezze thanks again for the report.

[chris-cooper]

Thanks team! 👍