Blender Git Loki

Cloth: more work done to update cloth after remesh

Getting closer and closer to updating the cloth mesh
Better method to get values of the new ClothVertex
Freeing previous cloth and assigning the clothObject to the new cloth
Some obstacles to tackle include: finding ClothVertex from MVert in an efficient manner; recreating many parts of the Cloth (bvhtree, tri, springs, etc)

Merge branch 'master' into greasepencil-object

Set up DirectX window to support drawing

With this the VR window should open fine and get cleared in a red-ish
orange using Direct3D 11 calls (well, on Windows that is).

The window still draws a 3D view to an offscreen buffer. Where we
usually just swap the buffers, we now allow calling a GHOST function to
blit the offscreen OpenGL buffer to whatever type of graphics buffer the
window uses (DirectX here).
The nice thing about this approach is that all DirectX code stays in
GHOST_ContextD3D.cpp. And the entire compatibiliy code can go into a
single function higher level modules don't need to care about.

This also fixes a number of issues introduced in earlier commits.

NULL -> nullptr

Beaaaautiful

Cloth: start implementation of updating cloth with new vertices

Idea is to flag all the newly created vertices. After all of the remeshing, create a new Cloth and add all the flagged vertices as well, switch out old Cloth for new Cloth. This is done because it seems harder to update the Cloth every time a new vertex is formed, would be easier to flag those vertices in BMesh and update the Cloth after the fact.
Currently added support to find the new ClothVertex's values.
Some design via comments added.

Abstracted hierarchy walking of Alembic exporter

OpenVDB: Make "simplify" available for render

Cycles: Fixed OpenVDB path names, there was a possible memory corruption when generating the absolute path to a VDB file.

Cycles: More work on OpenVDB rendering.

Moved it out of ImageManager to a VolumeManager. Added custom transforms to OpenVDB to swap and mirror XYZ.

[Fast import/export] Refactored iterators and added code to test copying data

Start of abstract hierarchy iterator for exporters

Cycles: First attempts at making OpenVDB modifier show up in render

Breaking stuff

Merge branch 'master' into greasepencil-object

Draw into OpenGL offscreen context in the DirectX window.

The window doesn't show anything of course. However we draw (at least I
assume it does) as regular, just into a window offscreen context.

A valid 3D view is created in the window. It's not visible but you see
cursor changes as you move over the window. So handling works.

OpenVDB: Added backwards compatibility with Tangent 2.78 builds.

(Disabled) code to open a DirectX window with the VR session

The window immediately crashes, hence keeping it disabled for now.

Not sure how much of this I'll leave in, for now this is mainly for
testing DirectX compatibility.

Outliner Visibility: Add Invisible filter

This adds an object invisible filter to the outliner to only show hidden
or disabled objects in the outliner. In large scenes, it is often
difficult to locate hidden objects in the outliner to show them again.
This invisible filter makes it easier.

Merge branch 'master' into soc-2019-outliner