[Bf-vfx] Fwd: movie clip tracking patch and questions

[David Jeske]

This is an email I sent to Sergey, in case anyone else wants to comment..

---------- Forwarded message ----------
From: David Jeske <davidj at gmail.com>
Date: Thu, Jun 27, 2013 at 12:24 AM
Subject: movie clip tracking patch and questions
To: Sergey Sharybin <sergey.vfx at gmail.com>


 > b) A couple places don't respect the dpi-scaling properly (they are
> super tiny on retina) movie-clip-dopesheet line-title-text. The whole the
> property->marker section.
>
>  Uh, didn't know this. And it's indeed nasty crap and we need to fix this.
> Could see some issues on my laptop, but would need help of someone with
> retina to help solving all the rest issues with DPI.
>

I made a patch for a few DPI issues, including the ones I saw in the movie
clip editor... DPI scaling issues are visible by modifying the
User-Preference "DPI". The font-size issue in the dopesheet is only visible
on Retina.


http://projects.blender.org/tracker/index.php?func=detail&aid=35889&group_id=9&atid=127

> c) movie-clip-editor marker-selection behavior and selection-sync between
> views feels both buggy and inconsistent...
>
> This is true..


I'm going to look and see if I can make a patch to fix the selection. It
should be easy. A few comments and questions below...


>  > c.1) clicking an already selected marker in movie-clip-tracking leaves
> the selection in-tact -- IMO it should act like 3d view and clear the
> selection first, then re-select the item. This is also true in the
> movie-editor-dopesheet.
>
> Not actually sure what does it mean. Is it about cycling through all
> markers which are almost at the same location when trying to select marker?
>

No. Clicking to select an item should clear the existing selection. The
existing selection should only preserved when shift-clicking. Currently it
preserves the selection even when normal-clicking.

> c.2) There is no way to remove a single marker from selection in
> movie-clip-tracking. If you shift-click a selected marker once in
> movie-clip-tracking, it makes it selected+active. If you shift-click it
> again, it returns to merely selected -- it should deselect it.
>
> Agree it's not so easy to deselect marker, but there's a reason to do so.
> You shall be able to deselect different areas of marker. For example, when
> you want to scale pattern using  general transform tool (S-key).
>

I think I see what it's doing now. It allows deselection of a marker while
keeping the search box selected. This is pretty odd behavior, as the
search-box feels more like a transform control than a separate item itself.
It's also weird, because a translate still moves the marker even when only
the search box is selected.

My guess here would be to keep current behavior when it's only a single
> marker select, and shift-select would deslect the whole marker when
> there're multiple markers selected?
>

How about a menu-bar "filter" allowing the user to control whether
translate/scale affect the whole marker, or just the search boxes for the
entire selection?

This would allow moving a many of search boxes together, without
introducing this selection confusion issue. This would also allow hotkeys
like "g" transform and x/y constraint, to work on the search-box, by
switching into the search-box mode. It would probably be sane for clearing
the selection to reset to "whole marker" mode.

If you like this, I can make a patch for it.

> c.4) movie-editor-dopesheet selection doesn't listen to selection from
> other views
>
> Dopesheet has got own selection. Idea of this is to be able to run
> different operators from dopesheet on tracks you've selected there.
>

In the 3dview dopesheet, there are potentially multiple dopesheet lines for
every 3d view object, so this separation is more understandable. However,
in the movie clip editor, there is a 1-to-1 relationship between markers
and dopesheet lines, so there is no reason for the selection set to be
different. Is there any reason for tracks to have multiple dopesheet lines?

Thanks.... David.
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