[Daily] Hidden-Line Pick Bugs - "Auto-Transparent Pick" disables when Hidden-Line pick is highlighted, and Hidden-Line pick does not work with "Experimental" Render Cache

[scottmudge]

Reporting from the tip of LinkDaily as of 04/11/2022.

Two issues with Hidden-Line Pick:

1. The Auto-Transparent Pick feature successfully allows the user to select hidden lines when [Shift] is held, however the transparent preview disables itself when a hidden-line pick is being previewed. The selected parent object (if occluded) does get placed on-top after selection is made.

Example:

FreeCAD_xRt3ivrKXB.mp4

(^ You may need to download and open in VLC)

2. You are probably aware, but the Hidden-Line Pick feature does not work with the Experimental render cache.

[scottmudge]

Nice! Looks beautiful.

Thanks!

[realthunder]

The above commit fixed a problem I found when investigating your report. This may or may not be the problem you have.

Please note that the Auto Transparent Pick is supposed to work in all render cache modes. But there are different behaviors. The one you showed in screen cast is the expected behavior of Auto Transparent Pick in non-experimental caching mode. It will make the pre-selected object transparent but will not make the object show on top, and hence will not enable auto hidden line picking. That's why you still need the Shift key to enable hidden line picking.

With experimental caching, pre-selected object will be shown on top, and hidden line picking is enabled without needing to hold the Shift key. The above commit fixed a bug in this mode.

[scottmudge]

It seems to have fixed my problem, and the experimental render cache works now too. Perhaps I didn't describe the original problem well to go along with the video. In any case, it's fixed!

Unrelated, but what's the plan/trajectory for merging the primary FreeCAD repo into LinkDaily? There's a few features now I'd love to use (e.g., the offset feature in the sketcher), but I don't want to abandon the benefits of your branch either.

[realthunder]

There is huge code refactoring in upstream recently, Sketcher WB being one of them. I'll do a merge once upstream 0.20 is released, probably in a month or so I think.

[scottmudge]

Yeah it's impressive work. Sounds awesome, I look forward to it! Thanks!