Blender Git Loki

handle node tree in lib_query.c

Add emitters, events, forces and control flow socket types

This is part of T73324.

The shapes and colors of the sockets will most likely change later on.

This script can be used to create a node with the new socket types:
```
import bpy

class MyCustomNode(bpy.types.Node):
bl_idname = 'CustomNodeType'
bl_label = "Custom Node"

def init(self, context):
self.inputs.new('NodeSocketEmitters', "Emitters")
self.inputs.new('NodeSocketEvents', "Events")
self.inputs.new('NodeSocketForces', "Forces")
self.inputs.new('NodeSocketControlFlow', "Control Flow")

self.outputs.new('NodeSocketEmitters', "Emitters")
self.outputs.new('NodeSocketEvents', "Events")
self.outputs.new('NodeSocketForces', "Forces")
self.outputs.new('NodeSocketControlFlow', "Control Flow")

bpy.utils.register_class(MyCustomNode)

if len(bpy.data.simulations) == 0:
bpy.data.simulations.new("Simulation")

sim = bpy.data.simulations[0]
sim.node_tree.nodes.new("CustomNodeType")
```

Differential Revision: https://developer.blender.org/D7349

New Object and Image socket types

The main difficulty with adding these types is that they are the first sockets types
that reference ID data in their `default_value`. That means that I had to add some
new logic in a few places to deal with reference counting. I hope I found all the places...
It seems to work fine in my tests.

For now these socket types can only be created using a script like the one below:
```
import bpy

class MyCustomNode(bpy.types.Node):
bl_idname = 'CustomNodeType'
bl_label = "Custom Node"

def init(self, context):
self.inputs.new('NodeSocketObject', "Object")
self.inputs.new('NodeSocketImage', "Image")

bpy.utils.register_class(MyCustomNode)

if len(bpy.data.simulations) == 0:
bpy.data.simulations.new("Simulation")

sim = bpy.data.simulations[0]
sim.node_tree.nodes.new("CustomNodeType")
```

After running the script, go to the simulation editor and select the newly created simulation.

---

We might want to change `readfile.c` so that linked objects/images are only loaded,
when the socket is not connected. Otherwise it can be tricky to figure out why certain
id data blocks are still referenced by the node tree later on.

Differential Revision: https://developer.blender.org/D7347

Merge branch 'simulation-tree-arc' into embedded_simulation_node_tree

fix after merge

Merge branch 'simulation-data-block' into simulation-tree-arc

Merge branch 'master' into simulation-data-block

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

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

initial node tree embedding and simulation editor

Add simulation node tree type

This implements a new builtin node tree type called `SimulationNodeTree`.
It is not yet embedded in the `Simulation` data block.

This is part of T73324.

The `WITH_NEW_SIMULATION_TYPE` cmake option is used to control whether `Simulation Editor` is shown in the editors menu.
Disabling the rna code with this option was a bit tricky, because the node tree type stores a reference to the rna type.
I could do the `#ifdef WITH_NEW_SIMULATION_TYPE` everywhere, but I'm not sure if it is worth the effort.

Currently there is only the group node, which is unusable, because there are no other nodes.
I'll submit those for review separately.

Differential Revision: https://developer.blender.org/D7287

Merge branch 'master' into simulation-data-block

Replace VO_DS_EXPAND with SIM_DS_EXPAND

remove unnecessary case in lib_remap.c