Blender Git Loki

Fix build with older CMake versions that we still need to support.

Merge branch 'master' into blender2.8

Fix T54287: memory not freed after rendering on Linux.

With new jemalloc versions memory allocated by threads that then become
inactive is not longer automatically freed. Instead we have to enable a
background thread to do it.

Some testing is needed to find out of this is sufficient, because the
background thread only runs periodically.

GP: Add z-depth offset parameter

This parameter allows to define the percentage of offset of a stroke when uses surface mode.

Before, this was a fixed value, but for some artists' purposes, it's good to have the option to change it.

Units: Support for fixed units

Users can select the main unit they want to use now.
Previously the displayed unit always depended on the magnitude of the value.
The old behavior can be restored by switching to the "Adaptive" mode for length, mass and time units.

Meters, kilograms and seconds are the default units for new and old scenes.

The selected unit is also the default unit for user input.
E.g. if cm is selected, whenever the user inputs a unitless number into a field of type length, it will be interpreted as cm.

Reviewer: brecht

Differential: https://developer.blender.org/D3740

Keymap: expose tool keymaps in the preferences

Currently some modes share tool keymaps, we might want to disable
this since it's confusing editing one thing in multiple places.

However this should be resolved in the tool definitions.

Transform: enable shrink-wrap even offset by default

Holding Alt now disables.

Fix T56975: Transform incorrect w/ constraint

Dial 3d Gizmo refactoring.

Transform the gizmo's drawing function into a generic function for use in other parts of the code.

RNA: Make various .add(count) a required arg

RNA: curve points add(count) a required arg

RNA: fcurve keyframe add(count) a required arg

This matches mesh add methods, and doesn't force it to be a keyword arg.

Extrude: add normal flip to mesh.extrude_context

Was giving errors on each access.

Shrink/Fatten: change default 'even-thickness'

Accessing from the tool and keyboard had different defaults,
disable by default for both.

Fix gizmo tooltips ignoring preference

Cleanup: style

Multi-Objects: TRANSFORM_OT_vertex_random

This was listed under the armature task yet it is used for meshes too.

Also make sure all the UI names are capitalized (normal > Normal).

Multi-Objects: Select similar armature: SIMEDBONE_LAYER

And final one as well.

Multi-Objecs: Select similar armature: SIMEDBONE_PREFIX and SIMEDBONE_SUFFIX

Multi-Objects: Select similar armature: SIMEDBONE_DIRECTION

Also added epsilon into the mix.