fix: filepath

fix: auto-updater operators registration to ensure blender 2.93 compatibility

See merge request slumber/multi-user!117

.gitlab-ci.yml

@@ -2,9 +2,12 @@ stages:
   - test
   - build
   - deploy
+  - doc
+
 
 
 include:
   - local: .gitlab/ci/test.gitlab-ci.yml
   - local: .gitlab/ci/build.gitlab-ci.yml
   - local: .gitlab/ci/deploy.gitlab-ci.yml
+  - local: .gitlab/ci/doc.gitlab-ci.yml

.gitlab/ci/build.gitlab-ci.yml

@@ -1,5 +1,6 @@
 build:
   stage: build
+  needs: ["test"]
   image: debian:stable-slim
   script:
     - rm -rf tests .git .gitignore script

.gitlab/ci/deploy.gitlab-ci.yml

@@ -1,5 +1,6 @@
 deploy:
   stage: deploy
+  needs: ["build"]
   image: slumber/docker-python  
   variables:
     DOCKER_DRIVER: overlay2

.gitlab/ci/doc.gitlab-ci.yml

@@ -0,0 +1,16 @@
+pages:
+  stage: doc
+  needs: ["deploy"]
+  image: python
+  script:
+  - pip install -U sphinx sphinx_rtd_theme sphinx-material
+  - sphinx-build -b html ./docs public
+  artifacts:
+    paths:
+    - public
+  only:
+    refs:
+    - master
+    - develop
+
+

CHANGELOG.md

@@ -157,4 +157,33 @@ All notable changes to this project will be documented in this file.
 - Empty and Light object selection highlights
 - Material renaming
 - Default material nodes input parameters
-- blender 2.91 python api compatibility
+- blender 2.91 python api compatibility
+
+## [0.3.0] - 2021-04-14
+
+### Added
+
+- Curve material support
+- Cycle visibility settings
+- Session save/load  operator 
+- Add new scene support
+- Physic initial support
+- Geometry node initial support
+- Blender 2.93 compatibility
+### Changed
+
+- Host documentation on Gitlab Page
+- Event driven update (from the blender deps graph)
+
+### Fixed
+
+- Vertex group assignation
+- Parent relation can't be removed
+- Separate object
+- Delete animation
+- Sync missing holdout option for grease pencil material
+- Sync missing `skin_vertices`  
+- Exception access violation during Undo/Redo
+- Sync missing armature bone Roll
+- Sync missing driver data_path
+- Constraint replication

README.md

@@ -19,44 +19,46 @@ This tool aims to allow multiple users to work on the same scene over the networ
 
 ## Usage
 
-See the [documentation](https://multi-user.readthedocs.io/en/latest/) for details.
+See the [documentation](https://slumber.gitlab.io/multi-user/index.html) for details.
 
 ## Troubleshooting
 
-See the [troubleshooting guide](https://multi-user.readthedocs.io/en/latest/getting_started/troubleshooting.html) for tips on the most common issues.
+See the [troubleshooting guide](https://slumber.gitlab.io/multi-user/getting_started/troubleshooting.html) for tips on the most common issues.
 
 ## Current development status
 
 Currently, not all data-block are supported for replication over the wire. The following list summarizes the status for each ones.
 
-| Name        | Status |                                   Comment                                    |
-| ----------- | :----: | :--------------------------------------------------------------------------: |
-| action      |   ✔️    |                                                                              |
-| armature    |   ❗    |                                  Not stable                                  |
-| camera      |   ✔️    |                                                                              |
-| collection  |   ✔️    |                                                                              |
-| curve       |   ❗    |                             Nurbs not supported                              |
-| gpencil     |   ✔️    | [Airbrush not supported](https://gitlab.com/slumber/multi-user/-/issues/123) |
-| image       |   ✔️    |                                                                              |
-| mesh        |   ✔️    |                                                                              |
-| material    |   ✔️    |                                                                              |
-| node_groups |   ❗    |                                Material only                                 |
-| metaball    |   ✔️    |                                                                              |
-| object      |   ✔️    |                                                                              |
-| textures    |   ❗    |                         Supported for modifiers only                         |
-| texts       |   ✔️    |                                                                              |
-| scene       |   ✔️    |                                                                              |
-| world       |   ✔️    |                                                                              |
-| lightprobes |   ✔️    |                                                                              |
-| compositing |   ❌    |         [Planned](https://gitlab.com/slumber/multi-user/-/issues/46)         |
-| texts       |   ❌    |         [Planned](https://gitlab.com/slumber/multi-user/-/issues/81)         |
-| nla         |   ❌    |                                                                              |
-| volumes     |   ✔️    |                                                                              |
-| particles   |   ❌    |        [On-going](https://gitlab.com/slumber/multi-user/-/issues/24)         |
-| speakers    |   ❗    |         [Partial](https://gitlab.com/slumber/multi-user/-/issues/65)         |
-| vse         |   ❗    |                       Mask and Clip not supported yet                        |
-| physics     |   ❌    |         [Planned](https://gitlab.com/slumber/multi-user/-/issues/45)         |
-| libraries   |   ❗    |                                   Partial                                    |
+| Name           | Status |                           Comment                            |
+| -------------- | :----: | :----------------------------------------------------------: |
+| action         |   ✔️    |                                                              |
+| armature       |   ❗    |                          Not stable                          |
+| camera         |   ✔️    |                                                              |
+| collection     |   ✔️    |                                                              |
+| curve          |   ❗    |                 Nurbs surfaces not supported                 |
+| gpencil        |   ✔️    |                                                              |
+| image          |   ✔️    |                                                              |
+| mesh           |   ✔️    |                                                              |
+| material       |   ✔️    |                                                              |
+| node_groups    |   ❗    |                   Material & Geometry only                   |
+| geometry nodes |   ✔️    |                                                              |
+| metaball       |   ✔️    |                                                              |
+| object         |   ✔️    |                                                              |
+| textures       |   ❗    |       Supported for modifiers/materials/geo nodes only       |
+| texts          |   ✔️    |                                                              |
+| scene          |   ✔️    |                                                              |
+| world          |   ✔️    |                                                              |
+| lightprobes    |   ✔️    |                                                              |
+| compositing    |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/46) |
+| texts          |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/81) |
+| nla            |   ❌    |                                                              |
+| volumes        |   ✔️    |                                                              |
+| particles      |   ❗    |                   The cache isn't syncing.                   |
+| speakers       |   ❗    | [Partial](https://gitlab.com/slumber/multi-user/-/issues/65) |
+| vse            |   ❗    |               Mask and Clip not supported yet                |
+| physics        |   ❌    | [Planned](https://gitlab.com/slumber/multi-user/-/issues/45) |
+| libraries      |   ❗    |                           Partial                            |
+
 
 
 ### Performance issues
@@ -74,7 +76,7 @@ I'm working on it.
 
 ## Contributing
 
-See [contributing section](https://multi-user.readthedocs.io/en/latest/ways_to_contribute.html) of the documentation.
+See [contributing section](https://slumber.gitlab.io/multi-user/ways_to_contribute.html) of the documentation.
 
 Feel free to [join the discord server](https://discord.gg/aBPvGws) to chat, seek help and contribute.
 

multi_user/addon_updater_ops.py

@@ -122,13 +122,13 @@ class addon_updater_install_popup(bpy.types.Operator):
 	# if true, run clean install - ie remove all files before adding new
 	# equivalent to deleting the addon and reinstalling, except the
 	# updater folder/backup folder remains
-	clean_install = bpy.props.BoolProperty(
+	clean_install: bpy.props.BoolProperty(
 		name="Clean install",
 		description="If enabled, completely clear the addon's folder before installing new update, creating a fresh install",
 		default=False,
 		options={'HIDDEN'}
 	)
-	ignore_enum = bpy.props.EnumProperty(
+	ignore_enum: bpy.props.EnumProperty(
 		name="Process update",
 		description="Decide to install, ignore, or defer new addon update",
 		items=[
@@ -264,7 +264,7 @@ class addon_updater_update_now(bpy.types.Operator):
 	# if true, run clean install - ie remove all files before adding new
 	# equivalent to deleting the addon and reinstalling, except the
 	# updater folder/backup folder remains
-	clean_install = bpy.props.BoolProperty(
+	clean_install: bpy.props.BoolProperty(
 		name="Clean install",
 		description="If enabled, completely clear the addon's folder before installing new update, creating a fresh install",
 		default=False,
@@ -332,7 +332,7 @@ class addon_updater_update_target(bpy.types.Operator):
 			i+=1
 		return ret
 
-	target = bpy.props.EnumProperty(
+	target: bpy.props.EnumProperty(
 		name="Target version to install",
 		description="Select the version to install",
 		items=target_version
@@ -341,7 +341,7 @@ class addon_updater_update_target(bpy.types.Operator):
 	# if true, run clean install - ie remove all files before adding new
 	# equivalent to deleting the addon and reinstalling, except the
 	# updater folder/backup folder remains
-	clean_install = bpy.props.BoolProperty(
+	clean_install: bpy.props.BoolProperty(
 		name="Clean install",
 		description="If enabled, completely clear the addon's folder before installing new update, creating a fresh install",
 		default=False,
@@ -399,7 +399,7 @@ class addon_updater_install_manually(bpy.types.Operator):
 	bl_description = "Proceed to manually install update"
 	bl_options = {'REGISTER', 'INTERNAL'}
 
-	error = bpy.props.StringProperty(
+	error: bpy.props.StringProperty(
 		name="Error Occurred",
 		default="",
 		options={'HIDDEN'}
@@ -461,7 +461,7 @@ class addon_updater_updated_successful(bpy.types.Operator):
 	bl_description = "Update installation response"
 	bl_options = {'REGISTER', 'INTERNAL', 'UNDO'}
 
-	error = bpy.props.StringProperty(
+	error: bpy.props.StringProperty(
 		name="Error Occurred",
 		default="",
 		options={'HIDDEN'}

multi_user/bl_types/__init__.py

@@ -42,6 +42,7 @@ __all__ = [
     # 'bl_sequencer',
     'bl_node_group',
     'bl_texture',
+    "bl_particle",
 ]  # Order here defines execution order
 
 if bpy.app.version[1] >= 91:

multi_user/bl_types/bl_material.py

@@ -27,7 +27,7 @@ from .dump_anything import Loader, Dumper
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
 
 NODE_SOCKET_INDEX = re.compile('\[(\d*)\]')
-IGNORED_SOCKETS = ['GEOMETRY']
+IGNORED_SOCKETS = ['GEOMETRY', 'SHADER', 'CUSTOM']
 
 def load_node(node_data: dict, node_tree: bpy.types.ShaderNodeTree):
     """ Load a node into a node_tree from a dict
@@ -53,31 +53,136 @@ def load_node(node_data: dict, node_tree: bpy.types.ShaderNodeTree):
     inputs_data = node_data.get('inputs')
     if inputs_data:
         inputs = [i for i in target_node.inputs if i.type not in IGNORED_SOCKETS]
-
-        for idx, inpt in enumerate(inputs_data):
-            if idx < len(inputs) and hasattr(inputs[idx], "default_value"):
+        for idx, inpt in enumerate(inputs):
+            if idx < len(inputs_data) and hasattr(inpt, "default_value"):
+                loaded_input = inputs_data[idx]
                 try:
-                    inputs[idx].default_value = inpt
+                    if inpt.type in ['OBJECT', 'COLLECTION']:
+                        inpt.default_value = get_datablock_from_uuid(loaded_input, None)
+                    else:
+                        inpt.default_value = loaded_input
                 except Exception as e:
-                    logging.warning(f"Node {target_node.name} input {inputs[idx].name} parameter not supported, skipping ({e})")
+                    logging.warning(f"Node {target_node.name} input {inpt.name} parameter not supported, skipping ({e})")
             else:
                 logging.warning(f"Node {target_node.name} input length mismatch.")
 
     outputs_data = node_data.get('outputs')
     if outputs_data:
         outputs = [o for o in target_node.outputs if o.type not in IGNORED_SOCKETS]
-        for idx, output in enumerate(outputs_data):
-            if idx < len(outputs) and hasattr(outputs[idx], "default_value"):
+        for idx, output in enumerate(outputs):
+            if idx < len(outputs_data) and hasattr(output, "default_value"):
+                loaded_output = outputs_data[idx]
                 try:
-                    outputs[idx].default_value = output
+                    if output.type in ['OBJECT', 'COLLECTION']:
+                        output.default_value = get_datablock_from_uuid(loaded_output, None)
+                    else:
+                        output.default_value = loaded_output
                 except Exception as e:
                     logging.warning(
-                        f"Node {target_node.name} output {outputs[idx].name} parameter not supported, skipping ({e})")
+                        f"Node {target_node.name} output {output.name} parameter not supported, skipping ({e})")
             else:
                 logging.warning(
                     f"Node {target_node.name} output length mismatch.")
 
 
+def dump_node(node: bpy.types.ShaderNode) -> dict:
+    """ Dump a single node to a dict
+
+        :arg node: target node
+        :type node: bpy.types.Node
+        :retrun: dict
+    """
+
+    node_dumper = Dumper()
+    node_dumper.depth = 1
+    node_dumper.exclude_filter = [
+        "dimensions",
+        "show_expanded",
+        "name_full",
+        "select",
+        "bl_label",
+        "bl_height_min",
+        "bl_height_max",
+        "bl_height_default",
+        "bl_width_min",
+        "bl_width_max",
+        "type",
+        "bl_icon",
+        "bl_width_default",
+        "bl_static_type",
+        "show_tetxure",
+        "is_active_output",
+        "hide",
+        "show_options",
+        "show_preview",
+        "show_texture",
+        "outputs",
+        "width_hidden",
+        "image"
+    ]
+
+    dumped_node = node_dumper.dump(node)
+
+    if node.parent:
+        dumped_node['parent'] = node.parent.name
+
+    dump_io_needed = (node.type not in ['REROUTE', 'OUTPUT_MATERIAL'])
+
+    if dump_io_needed:
+        io_dumper = Dumper()
+        io_dumper.depth = 2
+        io_dumper.include_filter = ["default_value"]
+
+        if hasattr(node, 'inputs'):
+            dumped_node['inputs'] = []
+            inputs = [i for i in node.inputs if i.type not in IGNORED_SOCKETS]
+            for idx, inpt in enumerate(inputs):
+                if hasattr(inpt, 'default_value'):
+                    if isinstance(inpt.default_value, bpy.types.ID):
+                        dumped_input = inpt.default_value.uuid
+                    else:
+                        dumped_input = io_dumper.dump(inpt.default_value)
+
+                    dumped_node['inputs'].append(dumped_input)
+
+        if hasattr(node, 'outputs'):
+            dumped_node['outputs'] = []
+            for idx, output in enumerate(node.outputs):
+                if output.type not in IGNORED_SOCKETS:
+                    if hasattr(output, 'default_value'):
+                        dumped_node['outputs'].append(
+                            io_dumper.dump(output.default_value))
+
+    if hasattr(node, 'color_ramp'):
+        ramp_dumper = Dumper()
+        ramp_dumper.depth = 4
+        ramp_dumper.include_filter = [
+            'elements',
+            'alpha',
+            'color',
+            'position',
+            'interpolation',
+            'hue_interpolation',
+            'color_mode'
+        ]
+        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
+    if hasattr(node, 'mapping'):
+        curve_dumper = Dumper()
+        curve_dumper.depth = 5
+        curve_dumper.include_filter = [
+            'curves',
+            'points',
+            'location'
+        ]
+        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
+    if hasattr(node, 'image') and getattr(node, 'image'):
+        dumped_node['image_uuid'] = node.image.uuid
+    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
+        dumped_node['node_tree_uuid'] = node.node_tree.uuid
+    return dumped_node
+
+
+
 def load_links(links_data, node_tree):
     """ Load node_tree links from a list
 
@@ -120,93 +225,6 @@ def dump_links(links):
     return links_data
 
 
-def dump_node(node: bpy.types.ShaderNode) -> dict:
-    """ Dump a single node to a dict
-
-        :arg node: target node
-        :type node: bpy.types.Node
-        :retrun: dict
-    """
-
-    node_dumper = Dumper()
-    node_dumper.depth = 1
-    node_dumper.exclude_filter = [
-        "dimensions",
-        "show_expanded",
-        "name_full",
-        "select",
-        "bl_label",
-        "bl_height_min",
-        "bl_height_max",
-        "bl_height_default",
-        "bl_width_min",
-        "bl_width_max",
-        "type",
-        "bl_icon",
-        "bl_width_default",
-        "bl_static_type",
-        "show_tetxure",
-        "is_active_output",
-        "hide",
-        "show_options",
-        "show_preview",
-        "show_texture",
-        "outputs",
-        "width_hidden",
-        "image"
-    ]
-
-    dumped_node = node_dumper.dump(node)
-
-    dump_io_needed = (node.type not in ['REROUTE', 'OUTPUT_MATERIAL'])
-
-    if dump_io_needed:
-        io_dumper = Dumper()
-        io_dumper.depth = 2
-        io_dumper.include_filter = ["default_value"]
-
-        if hasattr(node, 'inputs'):
-            dumped_node['inputs'] = []
-            for idx, inpt in enumerate(node.inputs):
-                if hasattr(inpt, 'default_value'):
-                    dumped_node['inputs'].append(
-                        io_dumper.dump(inpt.default_value))
-
-        if hasattr(node, 'outputs'):
-            dumped_node['outputs'] = []
-            for idx, output in enumerate(node.outputs):
-                if hasattr(output, 'default_value'):
-                    dumped_node['outputs'].append(
-                        io_dumper.dump(output.default_value))
-
-    if hasattr(node, 'color_ramp'):
-        ramp_dumper = Dumper()
-        ramp_dumper.depth = 4
-        ramp_dumper.include_filter = [
-            'elements',
-            'alpha',
-            'color',
-            'position',
-            'interpolation',
-            'color_mode'
-        ]
-        dumped_node['color_ramp'] = ramp_dumper.dump(node.color_ramp)
-    if hasattr(node, 'mapping'):
-        curve_dumper = Dumper()
-        curve_dumper.depth = 5
-        curve_dumper.include_filter = [
-            'curves',
-            'points',
-            'location'
-        ]
-        dumped_node['mapping'] = curve_dumper.dump(node.mapping)
-    if hasattr(node, 'image') and getattr(node, 'image'):
-        dumped_node['image_uuid'] = node.image.uuid
-    if hasattr(node, 'node_tree') and getattr(node, 'node_tree'):
-        dumped_node['node_tree_uuid'] = node.node_tree.uuid
-    return dumped_node
-
-
 def dump_node_tree(node_tree: bpy.types.ShaderNodeTree) -> dict:
     """ Dump a shader node_tree to a dict including links and nodes
 
@@ -263,7 +281,7 @@ def load_node_tree_sockets(sockets: bpy.types.Collection,
     """
     # Check for removed sockets
     for socket in sockets:
-        if not [s for s in sockets_data if socket['uuid'] == s[2]]:
+        if not [s for s in sockets_data if 'uuid' in socket and socket['uuid'] == s[2]]:
             sockets.remove(socket)
 
     # Check for new sockets
@@ -303,6 +321,14 @@ def load_node_tree(node_tree_data: dict, target_node_tree: bpy.types.ShaderNodeT
     for node in node_tree_data["nodes"]:
         load_node(node_tree_data["nodes"][node], target_node_tree)
 
+    for node_id, node_data in node_tree_data["nodes"].items():
+        target_node = target_node_tree.nodes.get(node_id, None)
+        if target_node is None:
+            continue
+        elif 'parent' in node_data:
+            target_node.parent =  target_node_tree.nodes[node_data['parent']]
+        else:
+            target_node.parent = None
     # TODO: load only required nodes links
     # Load nodes links
     target_node_tree.links.clear()
@@ -317,6 +343,8 @@ def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
     def has_node_group(node): return (
         hasattr(node, 'node_tree') and node.node_tree)
 
+    def has_texture(node): return (
+        node.type in ['ATTRIBUTE_SAMPLE_TEXTURE','TEXTURE']  and node.texture)
     deps = []
 
     for node in node_tree.nodes:
@@ -324,6 +352,8 @@ def get_node_tree_dependencies(node_tree: bpy.types.NodeTree) -> list:
             deps.append(node.image)
         elif has_node_group(node):
             deps.append(node.node_tree)
+        elif has_texture(node):
+            deps.append(node.texture)
 
     return deps
 
@@ -354,10 +384,7 @@ def load_materials_slots(src_materials: list, dst_materials: bpy.types.bpy_prop_
         if mat_uuid is not None:
             mat_ref = get_datablock_from_uuid(mat_uuid, None)
         else:
-            mat_ref = bpy.data.materials.get(mat_name, None)
-
-        if mat_ref is None:
-            raise Exception(f"Material {mat_name} doesn't exist")
+            mat_ref = bpy.data.materials[mat_name]
 
         dst_materials.append(mat_ref)
 

multi_user/bl_types/bl_object.py

@@ -23,6 +23,7 @@ import mathutils
 from replication.exception import ContextError
 
 from .bl_datablock import BlDatablock, get_datablock_from_uuid
+from .bl_material import IGNORED_SOCKETS
 from .dump_anything import (
     Dumper,
     Loader,
@@ -30,32 +31,97 @@ from .dump_anything import (
     np_dump_collection)
 
 
-
 SKIN_DATA = [
     'radius',
     'use_loose',
     'use_root'
 ]
 
-def get_input_index(e):
-    return int(re.findall('[0-9]+', e)[0])
+if bpy.app.version[1] >= 93:
+    SUPPORTED_GEOMETRY_NODE_PARAMETERS = (int, str, float)
+else:
+    SUPPORTED_GEOMETRY_NODE_PARAMETERS = (int, str)
+    logging.warning("Geometry node Float parameter not supported in \
+                    blender 2.92.")
+
+def get_node_group_inputs(node_group):
+    inputs = []
+    for inpt in node_group.inputs:
+        if inpt.type in IGNORED_SOCKETS:
+            continue
+        else:
+            inputs.append(inpt)
+    return inputs
+    # return [inpt.identifer for inpt in node_group.inputs if  inpt.type not in IGNORED_SOCKETS]
 
 
+def dump_physics(target: bpy.types.Object)->dict:
+    """ 
+        Dump all physics settings from a given object excluding modifier 
+        related physics settings (such as softbody, cloth, dynapaint and fluid) 
+    """
+    dumper = Dumper()
+    dumper.depth = 1
+    physics_data = {}
+
+    # Collisions (collision)
+    if target.collision and target.collision.use:
+        physics_data['collision'] = dumper.dump(target.collision)
+
+    # Field (field)
+    if target.field and target.field.type != "NONE":
+        physics_data['field'] = dumper.dump(target.field)
+
+    # Rigid Body (rigid_body)
+    if target.rigid_body:
+        physics_data['rigid_body'] = dumper.dump(target.rigid_body)
+
+    # Rigid Body constraint (rigid_body_constraint)
+    if target.rigid_body_constraint:
+        physics_data['rigid_body_constraint'] = dumper.dump(target.rigid_body_constraint)
+
+    return physics_data
+
+def load_physics(dumped_settings: dict, target: bpy.types.Object):
+    """  Load all physics settings from a given object excluding modifier 
+        related physics settings (such as softbody, cloth, dynapaint and fluid) 
+    """
+    loader = Loader()
+
+    if 'collision' in dumped_settings:
+        loader.load(target.collision, dumped_settings['collision'])
+
+    if 'field' in dumped_settings:
+        loader.load(target.field, dumped_settings['field'])
+
+    if 'rigid_body' in dumped_settings:
+        if not target.rigid_body:
+            bpy.ops.rigidbody.object_add({"object": target})
+        loader.load(target.rigid_body, dumped_settings['rigid_body'])
+    elif target.rigid_body:
+        bpy.ops.rigidbody.object_remove({"object": target})
+
+    if 'rigid_body_constraint' in dumped_settings:
+        if not target.rigid_body_constraint:
+            bpy.ops.rigidbody.constraint_add({"object": target})
+        loader.load(target.rigid_body_constraint, dumped_settings['rigid_body_constraint'])
+    elif target.rigid_body_constraint:
+        bpy.ops.rigidbody.constraint_remove({"object": target})
+    
 def dump_modifier_geometry_node_inputs(modifier: bpy.types.Modifier) -> list:
     """ Dump geometry node modifier input properties
 
         :arg modifier: geometry node modifier to dump
         :type modifier: bpy.type.Modifier
     """
-    inputs_name = [p for p in dir(modifier) if "Input_" in p]
-    inputs_name.sort(key=get_input_index)
     dumped_inputs = []
-    for inputs_index, input_name in enumerate(inputs_name):
-        input_value = modifier[input_name]
+    for inpt in get_node_group_inputs(modifier.node_group):
+        input_value = modifier[inpt.identifier]
+
         dumped_input = None
         if isinstance(input_value, bpy.types.ID):
             dumped_input = input_value.uuid
-        elif type(input_value) in [int, str, float]:
+        elif isinstance(input_value, SUPPORTED_GEOMETRY_NODE_PARAMETERS):
             dumped_input = input_value
         elif hasattr(input_value, 'to_list'):
             dumped_input = input_value.to_list()
@@ -73,18 +139,16 @@ def load_modifier_geometry_node_inputs(dumped_modifier: dict, target_modifier: b
         :type target_modifier: bpy.type.Modifier
     """
 
-    inputs_name = [p for p in dir(target_modifier) if "Input_" in p]
-    inputs_name.sort(key=get_input_index)
-    for input_index, input_name in enumerate(inputs_name):
+    for input_index, inpt in enumerate(get_node_group_inputs(target_modifier.node_group)):
         dumped_value = dumped_modifier['inputs'][input_index]
-        input_value = target_modifier[input_name]
-        if type(input_value) in [int, str, float]:
-            input_value = dumped_value
+        input_value = target_modifier[inpt.identifier]
+        if isinstance(input_value, SUPPORTED_GEOMETRY_NODE_PARAMETERS):
+            target_modifier[inpt.identifier] = dumped_value
         elif hasattr(input_value, 'to_list'):
             for index in range(len(input_value)):
                 input_value[index] = dumped_value[index]
-        else:
-            target_modifier[input_name] = get_datablock_from_uuid(
+        elif inpt.type in ['COLLECTION', 'OBJECT']:
+            target_modifier[inpt.identifier] = get_datablock_from_uuid(
                 dumped_value, None)
 
 
@@ -161,19 +225,24 @@ def find_textures_dependencies(modifiers: bpy.types.bpy_prop_collection) -> [bpy
     return textures
 
 
-def find_geometry_nodes(modifiers: bpy.types.bpy_prop_collection) -> [bpy.types.NodeTree]:
-    """ Find geometry nodes group from a modifier stack
+def find_geometry_nodes_dependencies(modifiers: bpy.types.bpy_prop_collection) -> [bpy.types.NodeTree]:
+    """ Find geometry nodes dependencies from a modifier stack
 
         :arg modifiers: modifiers collection
         :type modifiers: bpy.types.bpy_prop_collection
         :return: list of bpy.types.NodeTree pointers
     """
-    nodes_groups = []
-    for item in modifiers:
-        if item.type == 'NODES' and item.node_group:
-            nodes_groups.append(item.node_group)
+    dependencies = []
+    for mod in modifiers:
+        if mod.type == 'NODES' and mod.node_group:
+            dependencies.append(mod.node_group)
+            # for inpt in get_node_group_inputs(mod.node_group):
+            #     parameter = mod.get(inpt.identifier)
+            #     if parameter and isinstance(parameter, bpy.types.ID):
+            #         dependencies.append(parameter)
+
+    return dependencies
 
-    return nodes_groups
 
 def dump_vertex_groups(src_object: bpy.types.Object) -> dict:
     """ Dump object's vertex groups
@@ -219,6 +288,7 @@ def load_vertex_groups(dumped_vertex_groups: dict, target_object: bpy.types.Obje
         for index, weight in vg['vertices']:
             vertex_group.add([index], weight, 'REPLACE')
 
+
 class BlObject(BlDatablock):
     bl_id = "objects"
     bl_class = bpy.types.Object
@@ -296,9 +366,20 @@ class BlObject(BlDatablock):
         # Load transformation data
         loader.load(target, data)
 
+        #  Object display fields
         if 'display' in data:
             loader.load(target.display, data['display'])
 
+        #  Parenting
+        parent_id = data.get('parent_uid')
+        if parent_id:
+            parent = get_datablock_from_uuid(parent_id[0], bpy.data.objects[parent_id[1]])
+            # Avoid reloading
+            if target.parent != parent and parent is not None:
+                target.parent = parent
+        elif target.parent:
+            target.parent = None
+
         # Pose
         if 'pose' in data:
             if not target.pose:
@@ -343,14 +424,48 @@ class BlObject(BlDatablock):
                     SKIN_DATA)
 
         if hasattr(target, 'cycles_visibility') \
-            and 'cycles_visibility' in data:
+                and 'cycles_visibility' in data:
             loader.load(target.cycles_visibility, data['cycles_visibility'])
 
         # TODO: handle geometry nodes input from dump_anything
         if hasattr(target, 'modifiers'):
-            nodes_modifiers = [mod for mod in target.modifiers if mod.type == 'NODES']
+            nodes_modifiers = [
+                mod for mod in target.modifiers if mod.type == 'NODES']
             for modifier in nodes_modifiers:
-                load_modifier_geometry_node_inputs(data['modifiers'][modifier.name], modifier)
+                load_modifier_geometry_node_inputs(
+                    data['modifiers'][modifier.name], modifier)
+
+            particles_modifiers = [
+                mod for mod in target.modifiers if mod.type == 'PARTICLE_SYSTEM']
+
+            for mod in particles_modifiers:
+                default =  mod.particle_system.settings
+                dumped_particles = data['modifiers'][mod.name]['particle_system']
+                loader.load(mod.particle_system, dumped_particles)
+
+                settings = get_datablock_from_uuid(dumped_particles['settings_uuid'], None)
+                if settings:
+                    mod.particle_system.settings = settings
+                    # Hack to remove the default generated particle settings
+                    if not default.uuid:
+                        bpy.data.particles.remove(default)
+
+            phys_modifiers = [
+                mod for mod in target.modifiers if mod.type in ['SOFT_BODY', 'CLOTH']]
+            
+            for mod in phys_modifiers:
+                loader.load(mod.settings, data['modifiers'][mod.name]['settings'])
+
+        # PHYSICS
+        load_physics(data, target)
+
+        transform = data.get('transforms', None)
+        if transform:
+            target.matrix_parent_inverse = mathutils.Matrix(
+                transform['matrix_parent_inverse'])
+            target.matrix_basis = mathutils.Matrix(transform['matrix_basis'])
+            target.matrix_local = mathutils.Matrix(transform['matrix_local'])
+
 
     def _dump_implementation(self, data, instance=None):
         assert(instance)
@@ -366,7 +481,6 @@ class BlObject(BlDatablock):
         dumper.include_filter = [
             "name",
             "rotation_mode",
-            "parent",
             "data",
             "library",
             "empty_display_type",
@@ -381,8 +495,6 @@ class BlObject(BlDatablock):
             "color",
             "instance_collection",
             "instance_type",
-            "location",
-            "scale",
             'lock_location',
             'lock_rotation',
             'lock_scale',
@@ -396,12 +508,16 @@ class BlObject(BlDatablock):
             'show_all_edges',
             'show_texture_space',
             'show_in_front',
-            'type',
-            'rotation_quaternion' if instance.rotation_mode == 'QUATERNION' else 'rotation_euler',
+            'type'
         ]
 
         data = dumper.dump(instance)
 
+        dumper.include_filter = [
+            'matrix_parent_inverse',
+            'matrix_local',
+            'matrix_basis']
+        data['transforms'] = dumper.dump(instance)
         dumper.include_filter = [
             'show_shadows',
         ]
@@ -411,6 +527,10 @@ class BlObject(BlDatablock):
         if self.is_library:
             return data
 
+        # PARENTING
+        if instance.parent:
+            data['parent_uid'] = (instance.parent.uuid, instance.parent.name)
+
         # MODIFIERS
         if hasattr(instance, 'modifiers'):
             data["modifiers"] = {}
@@ -418,12 +538,29 @@ class BlObject(BlDatablock):
             if modifiers:
                 dumper.include_filter = None
                 dumper.depth = 1
+                dumper.exclude_filter = ['is_active']
                 for index, modifier in enumerate(modifiers):
-                    data["modifiers"][modifier.name] = dumper.dump(modifier)
+                    dumped_modifier = dumper.dump(modifier)
                     # hack to dump geometry nodes inputs
                     if modifier.type == 'NODES':
-                        dumped_inputs = dump_modifier_geometry_node_inputs(modifier)
-                        data["modifiers"][modifier.name]['inputs'] = dumped_inputs
+                        dumped_inputs = dump_modifier_geometry_node_inputs(
+                            modifier)
+                        dumped_modifier['inputs'] = dumped_inputs
+
+                    elif modifier.type == 'PARTICLE_SYSTEM':
+                        dumper.exclude_filter = [
+                            "is_edited",
+                            "is_editable",
+                            "is_global_hair"
+                        ]
+                        dumped_modifier['particle_system'] = dumper.dump(modifier.particle_system)
+                        dumped_modifier['particle_system']['settings_uuid'] = modifier.particle_system.settings.uuid
+
+                    elif modifier.type in ['SOFT_BODY', 'CLOTH']:
+                        dumped_modifier['settings'] = dumper.dump(modifier.settings)
+
+                    data["modifiers"][modifier.name] = dumped_modifier
+
         gp_modifiers = getattr(instance, 'grease_pencil_modifiers', None)
 
         if gp_modifiers:
@@ -445,6 +582,7 @@ class BlObject(BlDatablock):
                         'location']
                     gp_mod_data['curve'] = curve_dumper.dump(modifier.curve)
 
+
         # CONSTRAINTS
         if hasattr(instance, 'constraints'):
             dumper.include_filter = None
@@ -489,7 +627,6 @@ class BlObject(BlDatablock):
                 bone_groups[group.name] = dumper.dump(group)
             data['pose']['bone_groups'] = bone_groups
 
-
         # VERTEx GROUP
         if len(instance.vertex_groups) > 0:
             data['vertex_groups'] = dump_vertex_groups(instance)
@@ -526,7 +663,8 @@ class BlObject(BlDatablock):
         if hasattr(object_data, 'skin_vertices') and object_data.skin_vertices:
             skin_vertices = list()
             for skin_data in object_data.skin_vertices:
-                skin_vertices.append(np_dump_collection(skin_data.data, SKIN_DATA))
+                skin_vertices.append(
+                    np_dump_collection(skin_data.data, SKIN_DATA))
             data['skin_vertices'] = skin_vertices
 
         # CYCLE SETTINGS
@@ -541,6 +679,9 @@ class BlObject(BlDatablock):
             ]
             data['cycles_visibility'] = dumper.dump(instance.cycles_visibility)
 
+        # PHYSICS
+        data.update(dump_physics(instance))
+
         return data
 
     def _resolve_deps_implementation(self):
@@ -549,18 +690,23 @@ class BlObject(BlDatablock):
         # Avoid Empty case
         if self.instance.data:
             deps.append(self.instance.data)
-        if self.instance.parent :
-            deps.append(self.instance.parent)
+
+        # Particle systems
+        for particle_slot in self.instance.particle_systems:
+            deps.append(particle_slot.settings)
 
         if self.is_library:
             deps.append(self.instance.library)
 
+        if self.instance.parent:
+            deps.append(self.instance.parent)
+
         if self.instance.instance_type == 'COLLECTION':
             # TODO: uuid based
             deps.append(self.instance.instance_collection)
 
         if self.instance.modifiers:
             deps.extend(find_textures_dependencies(self.instance.modifiers))
-            deps.extend(find_geometry_nodes(self.instance.modifiers))
+            deps.extend(find_geometry_nodes_dependencies(self.instance.modifiers))
 
         return deps

multi_user/bl_types/bl_particle.py

@@ -0,0 +1,90 @@
+import bpy
+import mathutils
+
+from . import dump_anything
+from .bl_datablock import BlDatablock, get_datablock_from_uuid
+
+
+def dump_textures_slots(texture_slots: bpy.types.bpy_prop_collection) -> list:
+    """ Dump every texture slot collection as the form:
+        [(index, slot_texture_uuid, slot_texture_name), (), ...]
+    """
+    dumped_slots = []
+    for index, slot in enumerate(texture_slots):
+        if slot and slot.texture:
+            dumped_slots.append((index, slot.texture.uuid, slot.texture.name))
+
+    return dumped_slots
+
+
+def load_texture_slots(dumped_slots: list, target_slots: bpy.types.bpy_prop_collection):
+    """
+    """
+    for index, slot in enumerate(target_slots):
+        if slot:
+            target_slots.clear(index)
+
+    for index, slot_uuid, slot_name in dumped_slots:
+        target_slots.create(index).texture = get_datablock_from_uuid(
+            slot_uuid, slot_name
+        )
+
+IGNORED_ATTR = [
+    "is_embedded_data",
+    "is_evaluated",
+    "is_fluid",
+    "is_library_indirect",
+    "users"
+]
+
+class BlParticle(BlDatablock):
+    bl_id = "particles"
+    bl_class = bpy.types.ParticleSettings
+    bl_icon = "PARTICLES"
+    bl_check_common = False
+    bl_reload_parent = False
+
+    def _construct(self, data):
+        instance = bpy.data.particles.new(data["name"])
+        instance.uuid = self.uuid
+        return instance
+
+    def _load_implementation(self, data, target):
+        dump_anything.load(target, data)
+
+        dump_anything.load(target.effector_weights, data["effector_weights"])
+
+        # Force field
+        force_field_1 = data.get("force_field_1", None)
+        if force_field_1:
+            dump_anything.load(target.force_field_1, force_field_1)
+
+        force_field_2 = data.get("force_field_2", None)
+        if force_field_2:
+            dump_anything.load(target.force_field_2, force_field_2)
+
+        # Texture slots
+        load_texture_slots(data["texture_slots"], target.texture_slots)
+
+    def _dump_implementation(self, data, instance=None):
+        assert instance
+
+        dumper = dump_anything.Dumper()
+        dumper.depth = 1
+        dumper.exclude_filter = IGNORED_ATTR
+        data = dumper.dump(instance)
+
+        # Particle effectors
+        data["effector_weights"] = dumper.dump(instance.effector_weights)
+        if instance.force_field_1:
+            data["force_field_1"] = dumper.dump(instance.force_field_1)
+        if instance.force_field_2:
+            data["force_field_2"] = dumper.dump(instance.force_field_2)
+
+        # Texture slots
+        data["texture_slots"] = dump_textures_slots(instance.texture_slots)
+
+        return data
+
+    def _resolve_deps_implementation(self):
+        return [t.texture for t in self.instance.texture_slots if t and t.texture]

multi_user/bl_types/dump_anything.py

@@ -610,6 +610,8 @@ class Loader:
             instance.write(bpy.data.fonts.get(dump))
         elif isinstance(rna_property_type, T.Sound):
             instance.write(bpy.data.sounds.get(dump))
+        # elif isinstance(rna_property_type, T.ParticleSettings):
+        #     instance.write(bpy.data.particles.get(dump))
 
     def _load_matrix(self, matrix, dump):
         matrix.write(mathutils.Matrix(dump))

multi_user/operators.py

@@ -32,6 +32,7 @@ from operator import itemgetter
 from pathlib import Path
 from queue import Queue
 from time import gmtime, strftime
+from numpy import interp
 
 try:
     import _pickle as pickle
@@ -39,6 +40,7 @@ except ImportError:
     import pickle
 
 import bpy
+import bmesh
 import mathutils
 from bpy.app.handlers import persistent
 from bpy_extras.io_utils import ExportHelper, ImportHelper
@@ -56,6 +58,226 @@ background_execution_queue = Queue()
 deleyables = []
 stop_modal_executor = False
 
+CLEARED_DATABLOCKS = ['actions', 'armatures', 'cache_files', 'cameras',
+                     'collections', 'curves', 'fonts',
+                     'grease_pencils', 'images', 'lattices', 'libraries',
+                     'lightprobes', 'lights', 'linestyles', 'masks',
+                     'materials', 'meshes', 'metaballs', 'movieclips',
+                     'node_groups', 'objects', 'paint_curves', 'particles',
+                     'scenes', 'shape_keys', 'sounds', 'speakers', 'texts',
+                     'textures', 'volumes', 'worlds']
+
+PERSISTENT_DATABLOCKS = ['LineStyle', 'Dots Stroke', 'replay_action']
+
+def clean_scene(ignored_datablocks: list = None):
+    """ 
+        Delete all datablock of the scene except PERSISTENT_DATABLOCKS and ignored
+        ones in ignored_datablocks.
+    """
+    PERSISTENT_DATABLOCKS.extend(ignored_datablocks)
+    # Avoid to trigger a runtime error by keeping the last scene
+    PERSISTENT_DATABLOCKS.append(bpy.data.scenes[0].name)
+
+    for type_name in CLEARED_DATABLOCKS:
+        type_collection = getattr(bpy.data, type_name)
+        for datablock in type_collection:
+            if datablock.name in PERSISTENT_DATABLOCKS:
+                logging.debug(f"Skipping {datablock.name}")
+                continue
+            else:
+                logging.debug(f"Removing {datablock.name}")
+                type_collection.remove(datablock)
+
+    # Clear sequencer
+    bpy.context.scene.sequence_editor_clear()
+
+def get_bb_coords_from_obj(object: bpy.types.Object, instance: bpy.types.Object = None) -> list:
+    """ Generate  bounding box in world coordinate from object bound box
+
+    :param object: target object
+    :type object: bpy.types.Object
+    :param instance: optionnal instance
+    :type instance: bpy.types.Object
+    :return: list of 8 points [(x,y,z),...]
+    """
+    base = object.matrix_world
+
+    if instance:
+        scale =  mathutils.Matrix.Diagonal(object.matrix_world.to_scale())
+        base = instance.matrix_world @ scale.to_4x4()
+
+    bbox_corners = [base @ mathutils.Vector(
+        corner) for corner in object.bound_box]
+
+
+    return [(point.x, point.y, point.z) for point in bbox_corners]
+
+
+def bbox_from_obj(obj: bpy.types.Object, index: int = 1) -> list:
+    """ Generate a bounding box for a given object by using its world matrix
+
+        :param obj: target object
+        :type obj: bpy.types.Object
+        :param index: indice offset
+        :type index: int 
+        :return: list of 8 points [(x,y,z),...], list of 12 link between these points [(1,2),...]
+    """
+    radius = 1.0 # Radius of the bounding box
+    index = 8*index
+    vertex_indices = (
+            (0+index, 1+index), (0+index, 2+index), (1+index, 3+index), (2+index, 3+index),
+            (4+index, 5+index), (4+index, 6+index), (5+index, 7+index), (6+index, 7+index),
+            (0+index, 4+index), (1+index, 5+index), (2+index, 6+index), (3+index, 7+index))
+
+    if obj.type == 'EMPTY':
+        radius = obj.empty_display_size
+    elif obj.type == 'LIGHT':
+        radius = obj.data.shadow_soft_size
+    elif obj.type == 'LIGHT_PROBE':
+        radius = obj.data.influence_distance
+    elif obj.type == 'CAMERA':
+        radius = obj.data.display_size
+    elif hasattr(obj, 'bound_box'):
+        vertex_indices = (
+            (0+index, 1+index), (1+index, 2+index),
+            (2+index, 3+index), (0+index, 3+index),
+            (4+index, 5+index), (5+index, 6+index),
+            (6+index, 7+index), (4+index, 7+index),
+            (0+index, 4+index), (1+index, 5+index),
+            (2+index, 6+index), (3+index, 7+index))
+        vertex_pos = get_bb_coords_from_obj(obj)
+        return vertex_pos, vertex_indices
+
+    coords = [
+        (-radius, -radius, -radius), (+radius, -radius, -radius),
+        (-radius, +radius, -radius), (+radius, +radius, -radius),
+        (-radius, -radius, +radius), (+radius, -radius, +radius),
+        (-radius, +radius, +radius), (+radius, +radius, +radius)]
+
+    base = obj.matrix_world
+    bbox_corners = [base @ mathutils.Vector(corner) for corner in coords]
+
+    vertex_pos = [(point.x, point.y, point.z) for point in bbox_corners]
+
+    return vertex_pos, vertex_indices
+
+def draw_user(username, metadata, radius=0.01, intensity=10.0):
+    """ 
+        Generate a mesh representation of a given user frustum and 
+        sight of view.
+    """
+    view_corners =  metadata.get('view_corners')
+    color =  metadata.get('color', (1,1,1,0))
+    objects = metadata.get('selected_objects', None)
+    scene = metadata.get('scene_current', bpy.context.scene.name)
+
+    user_collection = bpy.data.collections.new(username)
+
+    # User Color
+    user_mat = bpy.data.materials.new(username)
+    user_mat.use_nodes = True
+    nodes = user_mat.node_tree.nodes
+    nodes.remove(nodes['Principled BSDF'])
+    emission_node = nodes.new('ShaderNodeEmission')
+    emission_node.inputs['Color'].default_value = color
+    emission_node.inputs['Strength'].default_value = intensity
+
+    output_node = nodes['Material Output']
+    user_mat.node_tree.links.new(
+        emission_node.outputs['Emission'], output_node.inputs['Surface'])
+
+    # Generate camera mesh
+    camera_vertices = view_corners[:4]
+    camera_vertices.append(view_corners[6])
+    camera_mesh = bpy.data.meshes.new(f"{username}_camera")
+    camera_obj = bpy.data.objects.new(f"{username}_camera", camera_mesh)
+    frustum_bm = bmesh.new()
+    frustum_bm.from_mesh(camera_mesh)
+
+    for p in camera_vertices:
+        frustum_bm.verts.new(p)
+    frustum_bm.verts.ensure_lookup_table()
+
+    frustum_bm.edges.new((frustum_bm.verts[0], frustum_bm.verts[2]))
+    frustum_bm.edges.new((frustum_bm.verts[2], frustum_bm.verts[1]))
+    frustum_bm.edges.new((frustum_bm.verts[1], frustum_bm.verts[3]))
+    frustum_bm.edges.new((frustum_bm.verts[3], frustum_bm.verts[0]))
+
+    frustum_bm.edges.new((frustum_bm.verts[0], frustum_bm.verts[4]))
+    frustum_bm.edges.new((frustum_bm.verts[2], frustum_bm.verts[4]))
+    frustum_bm.edges.new((frustum_bm.verts[1], frustum_bm.verts[4]))
+    frustum_bm.edges.new((frustum_bm.verts[3], frustum_bm.verts[4]))
+    frustum_bm.edges.ensure_lookup_table()
+
+    frustum_bm.to_mesh(camera_mesh)
+    frustum_bm.free()  # free and prevent further access
+
+    camera_obj.modifiers.new("wireframe", "SKIN")
+    camera_obj.data.skin_vertices[0].data[0].use_root = True
+    for v in camera_mesh.skin_vertices[0].data:
+        v.radius = [radius, radius]
+
+    camera_mesh.materials.append(user_mat)
+    user_collection.objects.link(camera_obj)
+
+    # Generate sight mesh
+    sight_mesh = bpy.data.meshes.new(f"{username}_sight")
+    sight_obj = bpy.data.objects.new(f"{username}_sight", sight_mesh)
+    sight_verts = view_corners[4:6]
+    sight_bm = bmesh.new()
+    sight_bm.from_mesh(sight_mesh)
+
+    for p in sight_verts:
+        sight_bm.verts.new(p)
+    sight_bm.verts.ensure_lookup_table()
+
+    sight_bm.edges.new((sight_bm.verts[0], sight_bm.verts[1]))
+    sight_bm.edges.ensure_lookup_table()
+    sight_bm.to_mesh(sight_mesh)
+    sight_bm.free()
+
+    sight_obj.modifiers.new("wireframe", "SKIN")
+    sight_obj.data.skin_vertices[0].data[0].use_root = True
+    for v in sight_mesh.skin_vertices[0].data:
+        v.radius = [radius, radius]
+
+    sight_mesh.materials.append(user_mat)
+    user_collection.objects.link(sight_obj)
+
+    # Draw selected objects
+    if objects:
+        for o in list(objects):
+            instance = bl_types.bl_datablock.get_datablock_from_uuid(o, None)
+            if instance:
+                bbox_mesh = bpy.data.meshes.new(f"{instance.name}_bbox")
+                bbox_obj = bpy.data.objects.new(
+                    f"{instance.name}_bbox", bbox_mesh)
+                bbox_verts, bbox_ind = bbox_from_obj(instance, index=0)
+                bbox_bm = bmesh.new()
+                bbox_bm.from_mesh(bbox_mesh)
+
+                for p in bbox_verts:
+                    bbox_bm.verts.new(p)
+                bbox_bm.verts.ensure_lookup_table()
+
+                for e in bbox_ind:
+                    bbox_bm.edges.new(
+                        (bbox_bm.verts[e[0]], bbox_bm.verts[e[1]]))
+
+                bbox_bm.to_mesh(bbox_mesh)
+                bbox_bm.free()
+                bpy.data.collections[username].objects.link(bbox_obj)
+
+                bbox_obj.modifiers.new("wireframe", "SKIN")
+                bbox_obj.data.skin_vertices[0].data[0].use_root = True
+                for v in bbox_mesh.skin_vertices[0].data:
+                    v.radius = [radius, radius]
+
+                bbox_mesh.materials.append(user_mat)
+
+    bpy.data.scenes[scene].collection.children.link(user_collection)
+
+
 def session_callback(name):
     """ Session callback wrapper
 
@@ -210,8 +432,6 @@ class SessionStartOperator(bpy.types.Operator):
                 type_module_class,
                 check_common=type_module_class.bl_check_common)
 
-            deleyables.append(timers.ApplyTimer(timeout=settings.depsgraph_update_rate))
-
         if bpy.app.version[1] >= 91:
             python_binary_path = sys.executable
         else:
@@ -272,6 +492,7 @@ class SessionStartOperator(bpy.types.Operator):
         # Background client updates service
         deleyables.append(timers.ClientUpdate())
         deleyables.append(timers.DynamicRightSelectTimer())
+        deleyables.append(timers.ApplyTimer(timeout=settings.depsgraph_update_rate))
         # deleyables.append(timers.PushTimer(
         #     queue=stagging,
         #     timeout=settings.depsgraph_update_rate
@@ -812,6 +1033,26 @@ class SessionStopAutoSaveOperator(bpy.types.Operator):
 
         return {'FINISHED'}
 
+class SessionRenderReplay(bpy.types.Operator):
+    bl_idname = "session.render_replay"
+    bl_label = "Render Replay"
+    bl_description = "Render Replay"
+
+    @classmethod
+    def poll(cls, context):
+        return context.window_manager.session.replay_files
+
+    def execute(self, context):
+        base_path = str(context.scene.render.filepath)
+        for frame in range(0,context.scene.frame_end):
+            logging.info(f"Rendering frame {frame} to {base_path}_{frame}.png")
+            context.scene.frame_current = frame
+            filename = Path(bpy.context.window_manager.session.replay_files[context.scene.active_replay_file].name)
+            context.scene.render.filepath = f"{base_path}{frame}_{filename.stem}"
+            bpy.ops.render.render(write_still=True)
+
+        context.scene.render.filepath = base_path
+        return {'FINISHED'}
 
 class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
     bl_idname = "session.load"
@@ -828,9 +1069,42 @@ class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
         maxlen=255,  # Max internal buffer length, longer would be clamped.
     )
 
+    draw_users: bpy.props.BoolProperty(
+        name="Load users",
+        description="Draw users in the scene",
+        default=False,
+    )
+
+    replay: bpy.props.BoolProperty(
+        name="Replay mode",
+        description="Enable replay functions",
+        default=False,
+    )
+
+    user_skin_radius: bpy.props.FloatProperty(
+        name="Wireframe radius",
+        description="Wireframe radius",
+        default=0.005,
+    )
+    user_color_intensity: bpy.props.FloatProperty(
+        name="Shading intensity",
+        description="Shading intensity",
+        default=1.0,
+    )
+
+    files:  bpy.props.CollectionProperty(
+        name='File paths',
+        type=bpy.types.OperatorFileListElement
+    )
+
+    def draw(self, context):
+        pass
+
     def execute(self, context):
         from replication.graph import ReplicationGraph
 
+        runtime_settings = context.window_manager.session
+
         # TODO: add filechecks
 
         try:
@@ -879,7 +1153,16 @@ class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
             
             logging.info("Graph succefully loaded")
 
-            utils.clean_scene()
+            # Persitstent collection 
+            ignored_datablocks = []
+    
+            persistent_collection = bpy.data.collections.get("multiuser_timelapse")
+            if self.replay and \
+            runtime_settings.replay_persistent_collection and \
+            persistent_collection:
+                ignored_datablocks = ['multiuser_timelapse','multiuser_timelapse_cam','multiuser_timelapse_cam_obj','multiuser_timelapse_path','multiuser_timelapse_path_obj', 'multiuser_timelapse_pathAction']
+
+            clean_scene(ignored_datablocks=ignored_datablocks)
 
             # Step 1: Construct nodes
             for node in graph.list_ordered():
@@ -889,6 +1172,69 @@ class SessionLoadSaveOperator(bpy.types.Operator, ImportHelper):
             for node in graph.list_ordered():
                 graph[node].apply()
 
+        if len(self.files) > 1:
+            runtime_settings.replay_files.clear()
+            context.scene.active_replay_file = len(self.files)-1
+            directory = Path(self.filepath).parent
+            file_list = [f['name'] for f in self.files]
+            file_list.sort()
+            for f in file_list:
+                snap = runtime_settings.replay_files.add()
+                snap.name = str(Path(directory, f))
+                print(f)
+            
+            if runtime_settings.replay_mode == 'TIMELINE':
+                replay_action = bpy.data.actions.get('replay_action', bpy.data.actions.new('replay_action'))
+
+                bpy.context.scene.animation_data_create()
+                bpy.context.scene.animation_data.action = replay_action
+                if len(replay_action.fcurves) > 0 and replay_action.fcurves[0].data_path == 'active_replay_file':
+                    replay_fcurve = replay_action.fcurves[0]
+                else:
+                    replay_fcurve = replay_action.fcurves.new('active_replay_file')
+                
+                for p in reversed(replay_fcurve.keyframe_points): 
+                    replay_fcurve.keyframe_points.remove(p, fast=True)
+
+                duration = runtime_settings.replay_duration
+                file_count = len(self.files)-1
+                for index in range(0, file_count):
+                    frame = interp(index, [0, file_count], [bpy.context.scene.frame_start, duration])
+                    replay_fcurve.keyframe_points.insert(frame, index)
+        
+        if self.draw_users:
+            f = gzip.open(self.filepath, "rb")
+            db = pickle.load(f)
+
+            users = db.get("users")
+
+            for username, user_data in users.items():
+                metadata = user_data['metadata']
+
+                if metadata:
+                    draw_user(username, metadata, radius=self.user_skin_radius, intensity=self.user_color_intensity)
+        
+
+        # Relink the persistent collection
+        if self.replay and persistent_collection:
+                logging.info(f"Relinking {persistent_collection.name}")
+                bpy.context.scene.collection.children.link(persistent_collection)
+        
+        # Reasign scene action
+        if self.replay and \
+            runtime_settings.replay_mode == 'TIMELINE' and \
+            not bpy.context.scene.animation_data :
+            bpy.context.scene.animation_data_create()
+            bpy.context.scene.animation_data.action = bpy.data.actions.get('replay_action')
+            bpy.context.scene.frame_end = runtime_settings.replay_duration
+        
+        # Reasign the scene camera
+        if self.replay and \
+            runtime_settings.replay_persistent_collection and \
+            runtime_settings.replay_camera:
+            bpy.context.scene.camera = runtime_settings.replay_camera
+
+        bpy.context.scene.eevee.use_bloom = False
 
         return {'FINISHED'}
 
@@ -918,6 +1264,7 @@ classes = (
     SessionLoadSaveOperator,
     SessionStopAutoSaveOperator,
     SessionPurgeOperator,
+    SessionRenderReplay
 )
 
 def update_external_dependencies():
@@ -968,6 +1315,16 @@ def load_pre_handler(dummy):
 
 @persistent
 def update_client_frame(scene):
+    setting = bpy.context.window_manager.session
+    if setting.replay_mode == 'TIMELINE' and \
+        setting.replay_files and \
+        scene.active_replay_file != setting.replay_frame_current :
+        index = bpy.context.scene.active_replay_file
+        bpy.ops.session.load(filepath=bpy.context.window_manager.session.replay_files[index].name,
+                             draw_users=True,
+                             replay=True)
+        setting.replay_frame_current = index
+
     if session and session.state['STATE'] == STATE_ACTIVE:
         session.update_user_metadata({
             'frame_current': scene.frame_current
@@ -995,7 +1352,7 @@ def depsgraph_evaluation(scene):
                 #   - if its ours or ( under common and diff), launch the
                 # update process
                 #   - if its to someone else, ignore the update
-                if node and node.owner in [session.id, RP_COMMON]:
+                if node and (node.owner == session.id or node.bl_check_common):
                     if node.state == UP:
                         try:
                             if node.has_changed():

multi_user/preferences.py

@@ -28,7 +28,7 @@ from . import bl_types, environment, addon_updater_ops, presence, ui
 from .utils import get_preferences, get_expanded_icon
 from replication.constants import RP_COMMON
 from replication.interface import session
-
+from numpy import interp
 # From https://stackoverflow.com/a/106223
 IP_REGEX = re.compile("^(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])$")
 HOSTNAME_REGEX = re.compile("^(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])$")
@@ -93,6 +93,88 @@ def set_log_level(self, value):
 def get_log_level(self):
     return logging.getLogger().level
 
+def set_active_replay(self, value):
+    files_count = len(bpy.context.window_manager.session.replay_files)
+
+    if files_count == 0:
+        return
+
+    max_index = files_count-1
+
+    if value > max_index:
+        value = max_index
+
+    if hasattr(self, 'active_replay_file'):
+        self["active_replay_file"] = value
+    else:
+        self.active_replay_file = value
+
+    if bpy.context.window_manager.session.replay_mode == 'MANUAL':
+        bpy.ops.session.load(
+            filepath=bpy.context.window_manager.session.replay_files[value].name,
+            draw_users=True,
+            replay=True)
+
+def get_active_replay(self):
+    return self.get('active_replay_file', 0)
+
+
+def set_replay_persistent_collection(self, value):
+    if hasattr(self, 'replay_persistent_collection'):
+        self["replay_persistent_collection"] = value
+    else:
+        self.replay_persistent_collection = value
+
+    collection = bpy.data.collections.get("multiuser_timelapse", None)
+
+    if collection is None and value:
+        collection = bpy.data.collections.new('multiuser_timelapse')
+        cam = bpy.data.cameras.get('multiuser_timelapse_cam', bpy.data.cameras.new('multiuser_timelapse_cam'))
+        cam_obj = bpy.data.objects.get('multiuser_timelapse_cam_obj',  bpy.data.objects.new('multiuser_timelapse_cam_obj', cam))
+        curve = bpy.data.curves.get('multiuser_timelapse_path', bpy.data.curves.new('multiuser_timelapse_path', 'CURVE'))
+        curve_obj = bpy.data.objects.get('multiuser_timelapse_path_obj',  bpy.data.objects.new('multiuser_timelapse_path_obj', curve))
+
+        if cam_obj.name not in collection.objects:
+            collection.objects.link(cam_obj)
+        if curve_obj.name not in collection.objects:
+            collection.objects.link(curve_obj)
+
+        bpy.context.scene.collection.children.link(collection)
+    elif collection and not value:
+        for o in collection.objects:
+            bpy.data.objects.remove(o)
+        bpy.data.collections.remove(collection)
+
+def get_replay_persistent_collection(self):
+    return self.get('replay_persistent_collection', False)
+
+def set_replay_duration(self, value):
+    if hasattr(self, 'replay_duration'):
+        self["replay_duration"] = value
+    else:
+        self.replay_duration = value
+
+    # Update the animation fcurve
+    replay_action = bpy.data.actions.get('replay_action')
+    replay_fcurve = None
+
+    for fcurve in replay_action.fcurves:
+        if fcurve.data_path == 'active_replay_file':
+            replay_fcurve = fcurve
+
+    if replay_fcurve:
+        for p in reversed(replay_fcurve.keyframe_points): 
+            replay_fcurve.keyframe_points.remove(p, fast=True)
+
+        bpy.context.scene.frame_end = value
+        files_count = len(bpy.context.window_manager.session.replay_files)-1
+        for index in range(0, files_count):
+            frame = interp(index,[0, files_count],[bpy.context.scene.frame_start, value])
+            replay_fcurve.keyframe_points.insert(frame, index)
+
+def get_replay_duration(self):
+    return self.get('replay_duration', 10)
+
 
 class ReplicatedDatablock(bpy.types.PropertyGroup):
     type_name: bpy.props.StringProperty()
@@ -195,7 +277,7 @@ class SessionPrefs(bpy.types.AddonPreferences):
     connection_timeout: bpy.props.IntProperty(
         name='connection timeout',
         description='connection timeout before disconnection',
-        default=1000
+        default=5000
     )
     # Replication update settings
     depsgraph_update_rate: bpy.props.FloatProperty(
@@ -530,6 +612,37 @@ class SessionProps(bpy.types.PropertyGroup):
     is_host: bpy.props.BoolProperty(
         default=False
     )
+    replay_files:  bpy.props.CollectionProperty(
+        name='File paths',
+        type=bpy.types.OperatorFileListElement
+    )
+    replay_persistent_collection: bpy.props.BoolProperty(
+        name="replay_persistent_collection",
+        description='Enable a collection that persist accross frames loading',
+        get=get_replay_persistent_collection,
+        set=set_replay_persistent_collection,
+    )
+    replay_mode: bpy.props.EnumProperty(
+        name='replay method',
+        description='Replay in keyframe (timeline) or manually',
+        items={
+            ('TIMELINE', 'TIMELINE', 'Replay from the timeline.'),
+            ('MANUAL', 'MANUAL', 'Replay manually, from the replay frame widget.')},
+        default='TIMELINE')
+    replay_duration: bpy.props.IntProperty(
+        name='replay interval',
+        default=250,
+        min=10,
+        set=set_replay_duration,
+        get=get_replay_duration,
+    )
+    replay_frame_current: bpy.props.IntProperty(
+        name='replay_frame_current',
+    )
+    replay_camera: bpy.props.PointerProperty(
+        name='Replay camera',
+        type=bpy.types.Object
+    )
 
 
 classes = (
@@ -552,9 +665,20 @@ def register():
         logging.debug('Generating bl_types preferences')
         prefs.generate_supported_types()
 
+    bpy.types.Scene.active_replay_file = bpy.props.IntProperty(
+        name="active_replay_file",
+        default=0,
+        min=0,
+        description='Active snapshot',
+        set=set_active_replay,
+        get=get_active_replay,
+        options={'ANIMATABLE'}
+    )
 
 def unregister():
     from bpy.utils import unregister_class
 
     for cls in reversed(classes):
         unregister_class(cls)
+    
+    del bpy.types.Scene.active_replay_file

multi_user/timers.py

@@ -17,7 +17,7 @@
 
 import logging
 import sys
-
+import traceback
 import bpy
 from replication.constants import (FETCHED, RP_COMMON, STATE_ACTIVE,
                                    STATE_INITIAL, STATE_LOBBY, STATE_QUITTING,
@@ -112,7 +112,8 @@ class ApplyTimer(Timer):
                     try:
                         session.apply(node)
                     except Exception as e:
-                        logging.error(f"Fail to apply {node_ref.uuid}: {e}")
+                        logging.error(f"Fail to apply {node_ref.uuid}")
+                        traceback.print_exc()
                     else:
                         if node_ref.bl_reload_parent:
                             for parent in session._graph.find_parents(node):

multi_user/ui.py

@@ -615,6 +615,39 @@ class VIEW3D_PT_overlay_session(bpy.types.Panel):
         row.active = settings.presence_show_user
         row.prop(settings, "presence_show_far_user")
 
+class SESSION_PT_replay(bpy.types.Panel):
+    bl_idname = "MULTIUSER_REPLAY_PT_panel"
+    bl_label = "Replay"
+    bl_space_type = 'VIEW_3D'
+    bl_region_type = 'UI'
+    bl_parent_id = 'MULTIUSER_SETTINGS_PT_panel'
+    bl_options = {'DEFAULT_CLOSED'}
+
+    @classmethod
+    def poll(cls, context):
+        return context.window_manager.session.replay_files
+
+    def draw_header(self, context):
+        self.layout.label(text="", icon='RECOVER_LAST')
+
+    def draw(self, context):
+        layout = self.layout
+        settings = context.window_manager.session
+        row= layout.row()
+        row.prop(settings,'replay_mode', toggle=True, expand=True)
+        row= layout.row()
+        if settings.replay_mode == 'MANUAL':
+            row.prop(bpy.context.scene, 'active_replay_file', text="Snapshot index")
+        else:
+            row.prop(settings, 'replay_duration', text="Replay Duration")
+        row= layout.row()
+        row.prop(settings, 'replay_persistent_collection', text="persistent collection", toggle=True, icon='OUTLINER_COLLECTION')
+
+        if settings.replay_persistent_collection:
+            row= layout.row()
+            row.prop(settings, 'replay_camera', text="", icon='VIEW_CAMERA')
+
+
 classes = (
     SESSION_UL_users,
     SESSION_PT_settings,
@@ -624,6 +657,7 @@ classes = (
     SESSION_PT_advanced_settings,
     SESSION_PT_user,
     SESSION_PT_repository,
+    SESSION_PT_replay,
     VIEW3D_PT_overlay_session,
 )
 

multi_user/utils.py

@@ -100,18 +100,6 @@ def get_state_str(state):
     return state_str
 
 
-def clean_scene():
-    for type_name in dir(bpy.data):
-        try:
-            type_collection = getattr(bpy.data, type_name)
-            for item in type_collection:
-                type_collection.remove(item)
-        except:
-            continue
-    
-    # Clear sequencer
-    bpy.context.scene.sequence_editor_clear()
-
 def get_selected_objects(scene, active_view_layer):
     return [obj.uuid for obj in scene.objects if obj.select_get(view_layer=active_view_layer)]
 

scripts/test_addon.py

@@ -13,7 +13,7 @@ def main():
     if len(sys.argv) > 2:
         blender_rev = sys.argv[2]
     else:
-        blender_rev = "2.91.0"
+        blender_rev = "2.92.0"
     
     try:
         exit_val = BAT.test_blender_addon(addon_path=addon, blender_revision=blender_rev)

tests/test_bl_types/test_object.py

@@ -7,7 +7,7 @@ import bpy
 import random
 from multi_user.bl_types.bl_object import BlObject
 
-# Removed 'BUILD' modifier because the seed doesn't seems to be
+# Removed 'BUILD', 'SOFT_BODY' modifier because the seed doesn't seems to be
 # correctly initialized (#TODO: report the bug)
 MOFIFIERS_TYPES = [
     'DATA_TRANSFER', 'MESH_CACHE', 'MESH_SEQUENCE_CACHE',
@@ -22,8 +22,7 @@ MOFIFIERS_TYPES = [
     'MESH_DEFORM', 'SHRINKWRAP', 'SIMPLE_DEFORM', 'SMOOTH',
     'CORRECTIVE_SMOOTH', 'LAPLACIANSMOOTH', 'SURFACE_DEFORM',
     'WARP', 'WAVE', 'CLOTH', 'COLLISION', 'DYNAMIC_PAINT',
-    'EXPLODE', 'FLUID', 'OCEAN', 'PARTICLE_INSTANCE',
-    'SOFT_BODY', 'SURFACE']
+    'EXPLODE', 'FLUID', 'OCEAN', 'PARTICLE_INSTANCE', 'SURFACE']
 
 GP_MODIFIERS_TYPE = [
     'GP_ARRAY', 'GP_BUILD', 'GP_MIRROR', 'GP_MULTIPLY',
@@ -72,5 +71,5 @@ def test_object(clear_blend):
     test = implementation._construct(expected)
     implementation._load(expected, test)
     result = implementation._dump(test)
-
+    print(DeepDiff(expected, result))
     assert not DeepDiff(expected, result)