Blender Git Loki

GPencil: Avoid double creation of Layers and Materials when converting to Mesh

Changed some data types based on feedback

Embed simulation node tree in simulation data block

This also shows the node tree in the Simulation Editor.
There is a new operator to add a simulation.

One debatable aspect of this patch is how I integrated the `SpaceNodeEditor.simulation`
property in RNA. I decided to wrap the existing `id` property, because the description
says `Data-block whose nodes are being edited`, which is exactly what is happening here.

Differential Revision: https://developer.blender.org/D7301

Solved a threading issue and made moving object collisions be detected

better handling when id has wrong type

better support for building without simulation type

show some builtin nodes in menu

support adding new simulation from header

cleanup simulation property of space

Merge branch 'simulation-tree-arc' into embedded_simulation_node_tree

add license headers

Merge branch 'master' into greasepencil-object

EEVEE: Object Motion Blur: Initial Implementation

This adds object motion blur vectors for EEVEE as well as better noise reduction for it.

For TAA reprojection we just compute the motion vector on the fly based on camera motion and depth buffer.
This makes possible to store another motion vector only for the blurring which is not useful for TAA history
fetching.

The changes are quite simple. We just do an extra pass to write the motion vectors for opaque objects and
use the motion vector to do the motion blur sampling.

This does not improve the postprocess motion blur itself.

Viewport support is kind of a hack, relying on cached previously drawn objects states, and is to be enabled
through experimental support panel in userpref.

Differential Revision: https://developer.blender.org/D7297

EEVEE: Motion Blur: Fix camera motion blur in render

EEVEE: Motion Blur: Fix rendering and center sample on current frame

EEVEE: Motion Blur: Make Temporal accumulation clear up the noise

EEVEE: Motion Blur: Fix missing motion vectors after first TAA sample

EEVEE: Motion Blur: Fix TAA reprojection

We compute the motion vector on the fly based on camera motion.

EEVEE: Motion Blur: Fix motion blur in render

EEVEE: Object Motion Blur: Initial Implementation