Blender Git Loki

GP Sculpt: Pinch brush can now be inverted using Ctrl (i.e. "Inflate")

Just like with the mesh sculpting tools, holding Ctrl can now be used to
apply the inverse transform when using the pinch brush. So, instead of
drawing the points towards the brush, Inflate will push them away.

GP Sculpt: Initial implementation of "Pinch" Brush

This brush draws all the points inwards towards the midpoint of the brush.
I'm not sure if this brush is really that useful or not, so I'll leave it
as-is for now.

Watch out for how strong you set the brush to be; even with 0.3, you can already
get some really strong/rapidly changing results.

GP Sculpt: Reduce maximum size of brushes to make the UI sliders more controllable

GP Sculpt: Fix for random crashes - forgot to adjust array size when adding new brush types

GPencil Sculpt: "Push" Brush

This is similar to the grab brush in that it translates points according to
the strength of the brush. The difference however is that it is applied instead
to whatever points are under the brush as it travels, instead of only those
that were within the brush region initially.

Notes:
* The effect of this brush is more like a "smear" effect
* I got a crash initially, but haven't been able to reproduce. So, unless this
crops up again, I'll consider that a one-off for now.

GPencil Sculpt: Added defines for a bunch of new brush types to be added

GPencil Sculpt: Improved tooltip for Grab brush

GPencil Smooth Brush: Added "Affect Pressure" option

Use the "Affect Pressure" option to smooth out the pressure values of strokes,
in addition to smoothing the coordinates.

Merge branch 'master' into GPencil_Editing_Stage3

GP Sculpt: "Grab" Brush

This brush can be used to move clusters of points around, without needing to
select them first. Like the "Grab" brush in Sculpt Mode, this brush only operates
on the brush circle at the start of the grab operation. The strength of the effect
applied to each point is determined at the start of the stroke based on factors
such as how far away from the center of the brush the point lies, and the strength
of the brush.

(Yay! Worked first time!)

GPencil Sculpt: Redraw the view on mousemove even if none of the strokes was affected

The active viewport needs to get redrawn, or else the brush circle will not move
when "selection mask" is enabled and the user is trying to paint over non-selected
areas.

GPencil Sculpt: MMB can now be used for viewport manipulations while the sculpt operator is active

CMake support

GPencil Sculpt: Code Cleanup

* Removed inlined math in favour of mathlib functions
* Simplified arguments to some functions/callbacks by reusing passsed-in coords
(as vectors/arrays instead of as separate values)

GP Smooth Brush: Affect endpoints by a reduced amount instead of not at all

Endpoints can't be handled normally, as they tend to easily "shrink",
reducing the length of the stroke. However, we still want some smoothing
to take place, as it looks odd without anything happening.

Merge branch 'master' into GPencil_Editing_Stage3

Code cleanup

* Remove all mention of the complicated way of implementing smoothing for now
* Disable debug print

GP Stroke Sculpting: Initial implementation of a "Smooth" Brush

This commit introduces a basic "smooth" brush tool for sculpting Grease Pencil
strokes (i.e. for getting rid of wobbles or kinks in the stroke). The current
implementation is still quite rough (with quite a few points noted about how it
could be better).

Usage Notes:
* It is highly recommended to have the "Use Falloff" option enabled. Doing so
allows you to have quite a bit more subtlety to how well you can control the
effects of this brush (i.e. this option can be used to prevent the brush from
"shrinking" the strokes too much, if you use the edge of the brush)

* A radius of 25 px, and strength = 0.5 are also good starting points


Implementation Notes:
* This currently only affects the stroke coordintes. Whether pressure values should
be handled by this brush (with/without an option to turn this on/off), or whether
it should be handled as a separate brush remains to be seen.

* This isn't exactly the most efficient implementation. It also suffers from the
fact that because its effects are applied from the first point in the stroke
to the last (and in a single pass), you can get unwanted accumulated smoothing
effects.

* Currently all points in the neighbourhood are given equal priority. We could
investigate different weighting schemes here.

* This is currently hardcoded to consider 2 points before and 2 points after the
current one. This could be improved by offering control over how many on either
side to consider...

GP Stroke Sculpting: Fix bug with falloff calculation

Falloff calculation was incorrect as it could produce invalid values if the
distance to a point exceeeded the radius of the brush, resulting in "large
negative values".

Merge branch 'master' into GPencil_Editing_Stage3