Blender Git Loki

Add grid option to grease pencil paper

Default values added too.

WIP: New paper function

This function allows to cover full viewport with a predefined color. This allows to hide the geometry in complex scenes and make the drawing area cleaner.

This function was requested by artist after working in Hero open movie using complex scenes with a lot of geometry "behind" of the grease pencil drawings.

WIP: New smooth thickness parameter

These parameters are part of the smooth test and can be removed in the future.

Remove Brush test parameters

After doing some test, remove several parameters added to verify smooth stroke.

Merge remote-tracking branch 'origin/blender2.8' into greasepencil-object

GP Build Modifier: Fix "Concurrent" Mode

The last segment of shorter strokes was always suddenly appearing.
it turns out the at the formulations for those factors was off.

Cleanup debug prints

GP Build Modifier: Rename direction -> transition, and rearrange UI panel

GP Build Mod Fixes

* Sequential mode now works - Accidentally removed the important tallying
step when cleaning up the code earlier

* Typo - Was looking for "direction" values in the wrong field

Fix crashes

* Forgot to remove strokes from frame before deleting their data
* Typo - Used old "gps" pointer not "cell->gps"

GP Build Modifier - RNA + UI

Show an error message if a GP modifier cannot be applied instead of failing silently

GP Build Modifier: Initial WIP implementation of this modifier

It's likely that there are still many bugs here, so caution is advised.

Partially revert rBc038bbbce2b

Remaining warning in grease pencil

Merge remote-tracking branch 'origin/blender2.8' into greasepencil-object

Merge commit '3abe8b3292cf7a50a9200b95401993384df24d9a' into greasepencil-object

Note: Since grease pencil had its own subversion, and this merge brings 2.80
subversion 2 as well, the files should be saved BEFORE this commit, to be sure
that all the doversion happened.

Merge commit '3abe8b3292cf7a50a9200b95401993384df24d9a^' into greasepencil-object

Silence warnings

Please keep the code warnings-free as much as possible.

UI: Add buttons at bottom bar

Add Only Render and Lock Camera View options to bottom toolbar because use the options in panels break the drawing workflow and use a lot of space in the drawing area.