Blender Git Loki

Added a basic RNA definition for the mesh sampling system.

Fix for invalid access to undefined hair data in edge-only cloth meshes.

Cloth data is used both for hair and actual cloth, which makes things
really difficult. The face number was used for distinguishing the two
types (no faces == hair mesh), but the extra hair data necessary for
hair sim is generated by particles and not available for edge-only cloth
meshes. This really needs to be sanitized ...

Presets for hair dynamics.

This is necessary because the hair dynamics settings are not part of the
ParticleSettings datablock, but part of the convoluted cloth modifier
inside the particle system struct. In the future this will be recoded
properly, but in the meantime presets provide a simple an unobtrusive
way to have reusable dynamics settings for hair.

Merge branch 'master' into gooseberry

Radical simplification of the wind effect on hair, since the previous
approach does not work very well.

Using a cross section estimate still causes large oscillations due to
varying hair force based on angles. It also requires a sensible hair
thickness value (particle radius) which is difficult to control and
visualize at this point.

The new model is based purely on per-vertex forces, which seems to be
much more stable. It's also somewhat justified by the fact that each
hair vertex represents a certain mass.

Improved force field effects on hair strands.

The previous calculation was modulated with the angle between the wind
direction and the segments, which leads to very oscillating behavior.

Now the formula includes an estimate for the geometric cross section
of a hair segment based on the incident angle and the hair thickness
(currently just the particle size). This gives a more stable behavior
and more realistic response to wind.

New python submodule `mathutils.interpolate` for various mesh interpolation and weighting methods.

This module will contain mirrored functions for calculating and applying
weights for points on a mesh. This includes barycentric and UV weighting
and possibly more advanced global weighting such as harmonic weights.

The naming should follow this scheme:
<type>_{2d,3d}_{calc,apply}

e.g.
poly_2d_calc
poly_2d_apply
uv_3d_calc
...

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D939

Merge branch 'wiggly-widgets' into gooseberry

Deactivate irritating shapekey widget while it's still under
development.

Hook up facemap property to bones.

A bone using a facemap will not be displayed at all, rather it will use
the facemap of the mesh as an interaction area. The facemap still does
nothing since it's not yet hooked up to the customdata and widget code.
That will come next.

Merge branch 'master' into gooseberry

Merge branch 'wiggly-widgets' into gooseberry

Support for custom cursors for widgets.

They are set when a highlighted widget intersection is detected and on
area level.

There's a discussion about using owners and a stack or array for cursors
but that needs some more thought and design.

More changes to overdrop transform operator.

* Calling key press confirms
* Change name of operator accordingly.

Merge branch 'wiggly-widgets' into gooseberry

Gooseberry request draw sequencer backdrop on -top- of everything.

Due to this we -obviously- rename this to overdrop

I am not sure if others would agree here, but it's pretty safe to do
this on a branch first. Rationale is that it's much nicer to work on
full screen with this.

Merge branch 'wiggly-widgets' into gooseberry

Minor adjustments to the cage transform widget and sequencer operator.

* Bigger scale handler for widget.
* Operator has description on area
* Cancelling resets position.

Merge branch 'master' into gooseberry

Merge branch 'wiggly-widgets' into gooseberry

Conflicts:
source/blender/blenloader/intern/versioning_270.c
source/blender/windowmanager/WM_api.h
source/blender/windowmanager/intern/wm_event_system.c