Blender Git Loki

Implement brush eraser quick switch

This eraser switch works very similar to smooth sculpt brush in object sculpt mode.

When the user press Ctrl, the current drawing brush is replaced by the default eraser brush while hold the key.

After release the override key, the brush back to the drawing brush.

UI: Hide appeareance panel for Eraser brush

Create a full set of eraser brushes

Create Soft, Hard and Stroke eraser brushes.

Add new property Default Eraser

This property will be used when the eraser is enabled using fast switch key while drawing with other type of brush.

Merge branch 'blender2.8' into greasepencil-object

Add new Eraser modes to UI panel

Now there are 3 types of Eraser in UI panel:

Soft: Need several passes to clean stroke.
Hard: One pass, clean points.
Stroke: Clean all stroke when touch any point.

This modes were available before using modifier keys, but it was not easy to discover.

Cleanup: Move eraser brush draw to function and avoid duplicated code

Fix problem with Eraser cursor size

The problem was the internal red area was not using the same size of the external lines.

Change Eraser brush to use brush radius not global value

The old configuration uses a global user prefs value, but now must be the brush size.

Still need to fix the problem when resize size of the brush.

Enable right cursor for Erase brush

The cursor must show that you are using the eraser

WIP: New Eraser brush

This new brush is equal to the old eraser, but it makes the interface more consistent.

Still need more work to adapt all eraser features, limit other actions not related to eraser and brush switching.

Cleanup previous commit

Make more compact the code

Hide Draw cursor when Eraser is enabled

If the eraser is enabled, the little color dot used as cursor for drawing must be hidden and replaced by dash line circle cursor only.

Remove duplicate line

This line had to be removed in a previous commit.

Merge branch 'blender2.8' into greasepencil-object

Fix again grease pencil modes after merge

Small change to capture algorithm

Adapt code after merge

THe code was moved to new module

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/editors/object/object_edit.c
source/blender/editors/object/object_select.c

Tweak missing event algorithm for extreme zoom

Due int number limitations, when the zoom factor is extreme, the points are captured with gaps. This change try to minimize this effect, but it's impossible to solve this issue completely.

The problem is the mouse position is always defined by a pair of int number, so the maximum precision is limited to that, so when project the point in 3D space, there are small precission erros.