add_mesh_extra_objects/__init__.py

@@ -13,7 +13,7 @@
 bl_info = {
     "name": "Extra Objects",
     "author": "Multiple Authors",
-    "version": (0, 3, 9),
+    "version": (0, 3, 10),
     "blender": (2, 80, 0),
     "location": "View3D > Add > Mesh",
     "description": "Add extra mesh object types",

add_mesh_extra_objects/add_mesh_solid.py

@@ -51,6 +51,11 @@ def vSum(list):
     return reduce(lambda a, b: a + b, list)
 
 
+# Get a copy of the input faces, but with the normals flipped by reversing the order of the vertex indices of each face.
+def flippedFaceNormals(faces):
+    return [list(reversed(vertexIndices)) for vertexIndices in faces]
+
+
 # creates the 5 platonic solids as a base for the rest
 #  plato: should be one of {"4","6","8","12","20"}. decides what solid the
 #         outcome will be.
@@ -146,7 +151,8 @@ def createSolid(plato, vtrunc, etrunc, dual, snub):
             vInput, fInput = source(dualSource[plato])
             supposedSize = vSum(vInput[i] for i in fInput[0]).length / len(fInput[0])
             vInput = [-i * supposedSize for i in vInput]            # mirror it
-            return vInput, fInput
+            # Inverting vInput turns the mesh inside-out, so normals need to be flipped.
+            return vInput, flippedFaceNormals(fInput)
         return source(plato)
     elif 0 < vtrunc <= 0.5:  # simple truncation of the source
         vInput, fInput = source(plato)
@@ -161,7 +167,8 @@ def createSolid(plato, vtrunc, etrunc, dual, snub):
                 vInput = [i * supposedSize for i in vInput]
                 return vInput, fInput
             vInput = [-i * supposedSize for i in vInput]
-            return vInput, fInput
+            # Inverting vInput turns the mesh inside-out, so normals need to be flipped.
+            return vInput, flippedFaceNormals(fInput)
 
     # generate connection database
     vDict = [{} for i in vInput]
@@ -269,6 +276,10 @@ def createSolid(plato, vtrunc, etrunc, dual, snub):
     if supposedSize and not dual:                    # this to make the vtrunc > 1 work
         supposedSize *= len(fvOutput[0]) / vSum(vOutput[i] for i in fvOutput[0]).length
         vOutput = [-i * supposedSize for i in vOutput]
+        # Inverting vOutput turns the mesh inside-out, so normals need to be flipped.
+        flipNormals = True
+    else:
+        flipNormals = False
 
     # create new faces by replacing old vert IDs by newly generated verts
     ffOutput = [[] for i in fInput]
@@ -287,7 +298,10 @@ def createSolid(plato, vtrunc, etrunc, dual, snub):
                 ffOutput[x].append(fvOutput[i][vData[i][3].index(x) - 1])
 
     if not dual:
-        return vOutput, fvOutput + feOutput + ffOutput
+        fOutput = fvOutput + feOutput + ffOutput
+        if flipNormals:
+            fOutput = flippedFaceNormals(fOutput)
+        return vOutput, fOutput
     else:
         # do the same procedure as above,  only now on the generated mesh
         # generate connection database

copy_global_transform.py

@@ -55,8 +55,6 @@ class AutoKeying:
             options.add('INSERTKEY_VISUAL')
         if prefs.edit.use_keyframe_insert_needed:
             options.add('INSERTKEY_NEEDED')
-        if prefs.edit.use_insertkey_xyz_to_rgb:
-            options.add('INSERTKEY_XYZ_TO_RGB')
         if ts.use_keyframe_cycle_aware:
             options.add('INSERTKEY_CYCLE_AWARE')
         return options

io_import_images_as_planes.py

@@ -911,7 +911,7 @@ class IMPORT_IMAGE_OT_to_plane(Operator, AddObjectHelper):
     # Core functionality
     def invoke(self, context, event):
         engine = context.scene.render.engine
-        if engine not in {'CYCLES', 'BLENDER_EEVEE'}:
+        if engine not in {'CYCLES', 'BLENDER_EEVEE','BLENDER_EEVEE_NEXT'}:
             if engine != 'BLENDER_WORKBENCH':
                 self.report({'ERROR'}, tip_("Cannot generate materials for unknown %s render engine") % engine)
                 return {'CANCELLED'}
@@ -986,7 +986,7 @@ class IMPORT_IMAGE_OT_to_plane(Operator, AddObjectHelper):
 
         # Configure material
         engine = context.scene.render.engine
-        if engine in {'CYCLES', 'BLENDER_EEVEE', 'BLENDER_WORKBENCH'}:
+        if engine in {'CYCLES', 'BLENDER_EEVEE', 'BLENDER_EEVEE_NEXT', 'BLENDER_WORKBENCH'}:
             material = self.create_cycles_material(context, img_spec)
 
         # Create and position plane object

io_mesh_stl/__init__.py

@@ -3,7 +3,7 @@
 # SPDX-License-Identifier: GPL-2.0-or-later
 
 bl_info = {
-    "name": "STL format",
+    "name": "STL format (legacy)",
     "author": "Guillaume Bouchard (Guillaum)",
     "version": (1, 1, 3),
     "blender": (2, 81, 6),
@@ -60,7 +60,7 @@ from bpy.types import (
 @orientation_helper(axis_forward='Y', axis_up='Z')
 class ImportSTL(Operator, ImportHelper):
     bl_idname = "import_mesh.stl"
-    bl_label = "Import STL"
+    bl_label = "Import STL (legacy)"
     bl_description = "Load STL triangle mesh data"
     bl_options = {'UNDO'}
 
@@ -190,7 +190,7 @@ class STL_PT_import_geometry(bpy.types.Panel):
 @orientation_helper(axis_forward='Y', axis_up='Z')
 class ExportSTL(Operator, ExportHelper):
     bl_idname = "export_mesh.stl"
-    bl_label = "Export STL"
+    bl_label = "Export STL (legacy)"
     bl_description = """Save STL triangle mesh data"""
 
     filename_ext = ".stl"
@@ -403,11 +403,11 @@ class STL_PT_export_geometry(bpy.types.Panel):
 
 
 def menu_import(self, context):
-    self.layout.operator(ImportSTL.bl_idname, text="Stl (.stl)")
+    self.layout.operator(ImportSTL.bl_idname, text="Stl (.stl) (legacy)")
 
 
 def menu_export(self, context):
-    self.layout.operator(ExportSTL.bl_idname, text="Stl (.stl)")
+    self.layout.operator(ExportSTL.bl_idname, text="Stl (.stl) (legacy)")
 
 
 classes = (

io_scene_3ds/__init__.py

@@ -367,4 +367,4 @@ def unregister():
 
 
 if __name__ == "__main__":
-    register()
+    register()

io_scene_3ds/export_3ds.py

@@ -174,7 +174,7 @@ def sane_name(name):
         return name_fixed
 
     # Strip non ascii chars
-    new_name_clean = new_name = name.encode("ASCII", "replace").decode("ASCII")[:12]
+    new_name_clean = new_name = name.encode("ASCII", "replace").decode("ASCII")[:16]
     i = 0
 
     while new_name in name_unique:

io_scene_3ds/import_3ds.py

@@ -260,6 +260,7 @@ def add_texture_to_material(image, contextWrapper, pct, extend, alpha, scale, of
             tint1[:3] + [1] if tint1 else shader.inputs['Base Color'].default_value[:])
         contextWrapper._grid_to_location(1, 2, dst_node=mixer, ref_node=shader)
         img_wrap = contextWrapper.base_color_texture
+        image.alpha_mode = 'CHANNEL_PACKED'
         links.new(mixer.outputs['Color'], shader.inputs['Base Color'])
         if tint2 is not None:
             img_wrap.colorspace_name = 'Non-Color'

io_scene_fbx/__init__.py

@@ -5,7 +5,7 @@
 bl_info = {
     "name": "FBX format",
     "author": "Campbell Barton, Bastien Montagne, Jens Restemeier, @Mysteryem",
-    "version": (5, 11, 3),
+    "version": (5, 11, 4),
     "blender": (4, 1, 0),
     "location": "File > Import-Export",
     "description": "FBX IO meshes, UVs, vertex colors, materials, textures, cameras, lamps and actions",

io_scene_fbx/encode_bin.py

@@ -4,10 +4,13 @@
 
 try:
     from . import data_types
+    from .fbx_utils_threading import MultiThreadedTaskConsumer
 except:
     import data_types
+    from fbx_utils_threading import MultiThreadedTaskConsumer
 
 from struct import pack
+from contextlib import contextmanager
 import array
 import numpy as np
 import zlib
@@ -51,6 +54,57 @@ class FBXElem:
         self._end_offset = -1
         self._props_length = -1
 
+    @classmethod
+    @contextmanager
+    def enable_multithreading_cm(cls):
+        """Temporarily enable multithreaded array compression.
+
+        The context manager handles starting up and shutting down the threads.
+
+        Only exits once all the threads are done (either all tasks were completed or an error occurred and the threads
+        were stopped prematurely).
+
+        Writing to a file is temporarily disabled as a safeguard."""
+        # __enter__()
+        orig_func = cls._add_compressed_array_helper
+        orig_write = cls._write
+
+        def insert_compressed_array(props, insert_at, data, length):
+            # zlib.compress releases the GIL, so can be multithreaded.
+            data = zlib.compress(data, 1)
+            comp_len = len(data)
+
+            encoding = 1
+            data = pack('<3I', length, encoding, comp_len) + data
+            props[insert_at] = data
+
+        with MultiThreadedTaskConsumer.new_cpu_bound_cm(insert_compressed_array) as wrapped_func:
+            try:
+                def _add_compressed_array_helper_multi(self, data, length):
+                    # Append a dummy value that will be replaced with the compressed array data later.
+                    self.props.append(...)
+                    # The index to insert the compressed array into.
+                    insert_at = len(self.props) - 1
+                    # Schedule the array to be compressed on a separate thread and then inserted into the hierarchy at
+                    # `insert_at`.
+                    wrapped_func(self.props, insert_at, data, length)
+
+                # As an extra safeguard, temporarily replace the `_write` function to raise an error if called.
+                def temp_write(*_args, **_kwargs):
+                    raise RuntimeError("Writing is not allowed until multithreaded array compression has been disabled")
+
+                cls._add_compressed_array_helper = _add_compressed_array_helper_multi
+                cls._write = temp_write
+
+                # Return control back to the caller of __enter__().
+                yield
+            finally:
+                # __exit__()
+                # Restore the original functions.
+                cls._add_compressed_array_helper = orig_func
+                cls._write = orig_write
+            # Exiting the MultiThreadedTaskConsumer context manager will wait for all scheduled tasks to complete.
+
     def add_bool(self, data):
         assert(isinstance(data, bool))
         data = pack('?', data)
@@ -130,21 +184,26 @@ class FBXElem:
         self.props_type.append(data_types.STRING)
         self.props.append(data)
 
+    def _add_compressed_array_helper(self, data, length):
+        """Note: This function may be swapped out by enable_multithreading_cm with an equivalent that supports
+        multithreading."""
+        data = zlib.compress(data, 1)
+        comp_len = len(data)
+
+        encoding = 1
+        data = pack('<3I', length, encoding, comp_len) + data
+        self.props.append(data)
+
     def _add_array_helper(self, data, prop_type, length):
+        self.props_type.append(prop_type)
         # mimic behavior of fbxconverter (also common sense)
         # we could make this configurable.
         encoding = 0 if len(data) <= 128 else 1
         if encoding == 0:
-            pass
+            data = pack('<3I', length, encoding, len(data)) + data
+            self.props.append(data)
         elif encoding == 1:
-            data = zlib.compress(data, 1)
-
-        comp_len = len(data)
-
-        data = pack('<3I', length, encoding, comp_len) + data
-
-        self.props_type.append(prop_type)
-        self.props.append(data)
+            self._add_compressed_array_helper(data, length)
 
     def _add_parray_helper(self, data, array_type, prop_type):
         assert (isinstance(data, array.array))

io_scene_fbx/export_fbx_bin.py

@@ -3495,31 +3495,35 @@ def save_single(operator, scene, depsgraph, filepath="",
     # Generate some data about exported scene...
     scene_data = fbx_data_from_scene(scene, depsgraph, settings)
 
-    root = elem_empty(None, b"")  # Root element has no id, as it is not saved per se!
+    # Enable multithreaded array compression in FBXElem and wait until all threads are done before exiting the context
+    # manager.
+    with encode_bin.FBXElem.enable_multithreading_cm():
+        # Writing elements into an FBX hierarchy can now begin.
+        root = elem_empty(None, b"")  # Root element has no id, as it is not saved per se!
 
-    # Mostly FBXHeaderExtension and GlobalSettings.
-    fbx_header_elements(root, scene_data)
+        # Mostly FBXHeaderExtension and GlobalSettings.
+        fbx_header_elements(root, scene_data)
 
-    # Documents and References are pretty much void currently.
-    fbx_documents_elements(root, scene_data)
-    fbx_references_elements(root, scene_data)
+        # Documents and References are pretty much void currently.
+        fbx_documents_elements(root, scene_data)
+        fbx_references_elements(root, scene_data)
 
-    # Templates definitions.
-    fbx_definitions_elements(root, scene_data)
+        # Templates definitions.
+        fbx_definitions_elements(root, scene_data)
 
-    # Actual data.
-    fbx_objects_elements(root, scene_data)
+        # Actual data.
+        fbx_objects_elements(root, scene_data)
 
-    # How data are inter-connected.
-    fbx_connections_elements(root, scene_data)
+        # How data are inter-connected.
+        fbx_connections_elements(root, scene_data)
 
-    # Animation.
-    fbx_takes_elements(root, scene_data)
+        # Animation.
+        fbx_takes_elements(root, scene_data)
 
-    # Cleanup!
-    fbx_scene_data_cleanup(scene_data)
+        # Cleanup!
+        fbx_scene_data_cleanup(scene_data)
 
-    # And we are down, we can write the whole thing!
+    # And we are done, all multithreaded tasks are complete, and we can write the whole thing to file!
     encode_bin.write(filepath, root, FBX_VERSION)
 
     # Clear cached ObjectWrappers!

io_scene_fbx/fbx_utils_threading.py

@@ -0,0 +1,194 @@
+# SPDX-FileCopyrightText: 2023 Blender Foundation
+#
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+from contextlib import contextmanager, nullcontext
+import os
+from queue import SimpleQueue
+
+# Note: `bpy` cannot be imported here because this module is also used by the fbx2json.py and json2fbx.py scripts.
+
+# For debugging/profiling purposes, can be modified at runtime to force single-threaded execution.
+_MULTITHREADING_ENABLED = True
+# The concurrent.futures module may not work or may not be available on WebAssembly platforms wasm32-emscripten and
+# wasm32-wasi.
+try:
+    from concurrent.futures import ThreadPoolExecutor
+except ModuleNotFoundError:
+    _MULTITHREADING_ENABLED = False
+    ThreadPoolExecutor = None
+else:
+    try:
+        # The module may be available, but not be fully functional. An error may be raised when attempting to start a
+        # new thread.
+        with ThreadPoolExecutor() as tpe:
+            # Attempt to start a thread by submitting a callable.
+            tpe.submit(lambda: None)
+    except Exception:
+        # Assume that multithreading is not supported and fall back to single-threaded execution.
+        _MULTITHREADING_ENABLED = False
+
+
+def get_cpu_count():
+    """Get the number of cpus assigned to the current process if that information is available on this system.
+    If not available, get the total number of cpus.
+    If the cpu count is indeterminable, it is assumed that there is only 1 cpu available."""
+    sched_getaffinity = getattr(os, "sched_getaffinity", None)
+    if sched_getaffinity is not None:
+        # Return the number of cpus assigned to the current process.
+        return len(sched_getaffinity(0))
+    count = os.cpu_count()
+    return count if count is not None else 1
+
+
+class MultiThreadedTaskConsumer:
+    """Helper class that encapsulates everything needed to run a function on separate threads, with a single-threaded
+    fallback if multithreading is not available.
+
+    Lower overhead than typical use of ThreadPoolExecutor because no Future objects are returned, which makes this class
+    more suitable to running many smaller tasks.
+
+    As with any threaded parallelization, because of Python's Global Interpreter Lock, only one thread can execute
+    Python code at a time, so threaded parallelization is only useful when the functions used release the GIL, such as
+    many IO related functions."""
+    # A special task value used to signal task consumer threads to shut down.
+    _SHUT_DOWN_THREADS = object()
+
+    __slots__ = ("_consumer_function", "_shared_task_queue", "_task_consumer_futures", "_executor",
+                 "_max_consumer_threads", "_shutting_down", "_max_queue_per_consumer")
+
+    def __init__(self, consumer_function, max_consumer_threads, max_queue_per_consumer=5):
+        # It's recommended to use MultiThreadedTaskConsumer.new_cpu_bound_cm() instead of creating new instances
+        # directly.
+        # __init__ should only be called after checking _MULTITHREADING_ENABLED.
+        assert(_MULTITHREADING_ENABLED)
+        # The function that will be called on separate threads to consume tasks.
+        self._consumer_function = consumer_function
+        # All the threads share a single queue. This is a simplistic approach, but it is unlikely to be problematic
+        # unless the main thread is expected to wait a long time for the consumer threads to finish.
+        self._shared_task_queue = SimpleQueue()
+        # Reference to each thread is kept through the returned Future objects. This is used as part of determining when
+        # new threads should be started and is used to be able to receive and handle exceptions from the threads.
+        self._task_consumer_futures = []
+        # Create the executor.
+        self._executor = ThreadPoolExecutor(max_workers=max_consumer_threads)
+        # Technically the max workers of the executor is accessible through its `._max_workers`, but since it's private,
+        # meaning it could be changed without warning, we'll store the max workers/consumers ourselves.
+        self._max_consumer_threads = max_consumer_threads
+        # The maximum task queue size (before another consumer thread is started) increases by this amount with every
+        # additional consumer thread.
+        self._max_queue_per_consumer = max_queue_per_consumer
+        # When shutting down the threads, this is set to True as an extra safeguard to prevent new tasks being
+        # scheduled.
+        self._shutting_down = False
+
+    @classmethod
+    def new_cpu_bound_cm(cls, consumer_function, other_cpu_bound_threads_in_use=1, hard_max_threads=32):
+        """Return a context manager that, when entered, returns a wrapper around `consumer_function` that schedules
+        `consumer_function` to be run on a separate thread.
+
+        If the system can't use multithreading, then the context manager's returned function will instead be the input
+        `consumer_function` argument, causing tasks to be run immediately on the calling thread.
+
+        When exiting the context manager, it waits for all scheduled tasks to complete and prevents the creation of new
+        tasks, similar to calling ThreadPoolExecutor.shutdown(). For these reasons, the wrapped function should only be
+        called from the thread that entered the context manager, otherwise there is no guarantee that all tasks will get
+        scheduled before the context manager exits.
+
+        Any task that fails with an exception will cause all task consumer threads to stop.
+
+        The maximum number of threads used matches the number of cpus available up to a maximum of `hard_max_threads`.
+        `hard_max_threads`'s default of 32 matches ThreadPoolExecutor's default behaviour.
+
+        The maximum number of threads used is decreased by `other_cpu_bound_threads_in_use`. Defaulting to `1`, assuming
+        that the calling thread will also be doing CPU-bound work.
+
+        Most IO-bound tasks can probably use a ThreadPoolExecutor directly instead because there will typically be fewer
+        tasks and, on average, each individual task will take longer.
+        If needed, `cls.new_cpu_bound_cm(consumer_function, -4)` could be suitable for lots of small IO-bound tasks,
+        because it ensures a minimum of 5 threads, like the default ThreadPoolExecutor."""
+        if _MULTITHREADING_ENABLED:
+            max_threads = get_cpu_count() - other_cpu_bound_threads_in_use
+            max_threads = min(max_threads, hard_max_threads)
+            if max_threads > 0:
+                return cls(consumer_function, max_threads)._wrap_executor_cm()
+        # Fall back to single-threaded.
+        return nullcontext(consumer_function)
+
+    def _task_consumer_callable(self):
+        """Callable that is run by each task consumer thread.
+        Signals the other task consumer threads to stop when stopped intentionally or when an exception occurs."""
+        try:
+            while True:
+                # Blocks until it can get a task.
+                task_args = self._shared_task_queue.get()
+
+                if task_args is self._SHUT_DOWN_THREADS:
+                    # This special value signals that it's time for all the threads to stop.
+                    break
+                else:
+                    # Call the task consumer function.
+                    self._consumer_function(*task_args)
+        finally:
+            # Either the thread has been told to shut down because it received _SHUT_DOWN_THREADS or an exception has
+            # occurred.
+            # Add _SHUT_DOWN_THREADS to the queue so that the other consumer threads will also shut down.
+            self._shared_task_queue.put(self._SHUT_DOWN_THREADS)
+
+    def _schedule_task(self, *args):
+        """Task consumer threads are only started as tasks are added.
+
+        To mitigate starting lots of threads if many tasks are scheduled in quick succession, new threads are only
+        started if the number of queued tasks grows too large.
+
+        This function is a slight misuse of ThreadPoolExecutor. Normally each task to be scheduled would be submitted
+        through ThreadPoolExecutor.submit, but doing so is noticeably slower for small tasks. We could start new Thread
+        instances manually without using ThreadPoolExecutor, but ThreadPoolExecutor gives us a higher level API for
+        waiting for threads to finish and handling exceptions without having to implement an API using Thread ourselves.
+        """
+        if self._shutting_down:
+            # Shouldn't occur through normal usage.
+            raise RuntimeError("Cannot schedule new tasks after shutdown")
+        # Schedule the task by adding it to the task queue.
+        self._shared_task_queue.put(args)
+        # Check if more consumer threads need to be added to account for the rate at which tasks are being scheduled
+        # compared to the rate at which tasks are being consumed.
+        current_consumer_count = len(self._task_consumer_futures)
+        if current_consumer_count < self._max_consumer_threads:
+            # The max queue size increases as new threads are added, otherwise, by the time the next task is added, it's
+            # likely that the queue size will still be over the max, causing another new thread to be added immediately.
+            # Increasing the max queue size whenever a new thread is started gives some time for the new thread to start
+            # up and begin consuming tasks before it's determined that another thread is needed.
+            max_queue_size_for_current_consumers = self._max_queue_per_consumer * current_consumer_count
+
+            if self._shared_task_queue.qsize() > max_queue_size_for_current_consumers:
+                # Add a new consumer thread because the queue has grown too large.
+                self._task_consumer_futures.append(self._executor.submit(self._task_consumer_callable))
+
+    @contextmanager
+    def _wrap_executor_cm(self):
+        """Wrap the executor's context manager to instead return self._schedule_task and such that the threads
+        automatically start shutting down before the executor itself starts shutting down."""
+        # .__enter__()
+        # Exiting the context manager of the executor will wait for all threads to finish and prevent new
+        # threads from being created, as if its shutdown() method had been called.
+        with self._executor:
+            try:
+                yield self._schedule_task
+            finally:
+                # .__exit__()
+                self._shutting_down = True
+                # Signal all consumer threads to finish up and shut down so that the executor can shut down.
+                # When this is run on the same thread that schedules new tasks, this guarantees that no more tasks will
+                # be scheduled after the consumer threads start to shut down.
+                self._shared_task_queue.put(self._SHUT_DOWN_THREADS)
+
+                # Because `self._executor` was entered with a context manager, it will wait for all the consumer threads
+                # to finish even if we propagate an exception from one of the threads here.
+                for future in self._task_consumer_futures:
+                    # .exception() waits for the future to finish and returns its raised exception or None.
+                    ex = future.exception()
+                    if ex is not None:
+                        # If one of the threads raised an exception, propagate it to the main thread.
+                        # Only the first exception will be propagated if there were multiple.
+                        raise ex

io_scene_fbx/json2fbx.py

@@ -133,10 +133,10 @@ def json2fbx(fn):
 
     fn_fbx = "%s.fbx" % os.path.splitext(fn)[0]
     print("Writing: %r " % fn_fbx, end="")
-    json_root = []
     with open(fn) as f_json:
         json_root = json.load(f_json)
-    fbx_root, fbx_version = parse_json(json_root)
+    with encode_bin.FBXElem.enable_multithreading_cm():
+        fbx_root, fbx_version = parse_json(json_root)
     print("(Version %d) ..." % fbx_version)
     encode_bin.write(fn_fbx, fbx_root, fbx_version)
 

io_scene_fbx/parse_fbx.py

@@ -16,6 +16,7 @@ import zlib
 from io import BytesIO
 
 from . import data_types
+from .fbx_utils_threading import MultiThreadedTaskConsumer
 
 # at the end of each nested block, there is a NUL record to indicate
 # that the sub-scope exists (i.e. to distinguish between P: and P : {})
@@ -59,16 +60,10 @@ def read_elem_start64(read):
     return end_offset, prop_count, elem_id
 
 
-def unpack_array(read, array_type, array_stride, array_byteswap):
-    length, encoding, comp_len = read_array_params(read)
-
-    data = read(comp_len)
-
-    if encoding == 0:
-        pass
-    elif encoding == 1:
-        data = zlib.decompress(data)
-
+def _create_array(data, length, array_type, array_stride, array_byteswap):
+    """Create an array from FBX data."""
+    # If size of the data does not match the expected size of the array, then something is wrong with the code or the
+    # FBX file.
     assert(length * array_stride == len(data))
 
     data_array = array.array(array_type, data)
@@ -77,6 +72,49 @@ def unpack_array(read, array_type, array_stride, array_byteswap):
     return data_array
 
 
+def _decompress_and_insert_array(elem_props_data, index_to_set, compressed_array_args):
+    """Decompress array data and insert the created array into the FBX tree being parsed.
+
+    This is usually called from a separate thread to the main thread."""
+    compressed_data, length, array_type, array_stride, array_byteswap = compressed_array_args
+
+    # zlib.decompress releases the Global Interpreter Lock, so another thread can run code while waiting for the
+    # decompression to complete.
+    data = zlib.decompress(compressed_data, bufsize=length * array_stride)
+
+    # Create and insert the array into the parsed FBX hierarchy.
+    elem_props_data[index_to_set] = _create_array(data, length, array_type, array_stride, array_byteswap)
+
+
+def unpack_array(read, array_type, array_stride, array_byteswap):
+    """Unpack an array from an FBX file being parsed.
+
+    If the array data is compressed, the compressed data is combined with the other arguments into a tuple to prepare
+    for decompressing on a separate thread if possible.
+
+    If the array data is not compressed, the array is created.
+
+    Returns (tuple, True) or (array, False)."""
+    length, encoding, comp_len = read_array_params(read)
+
+    data = read(comp_len)
+
+    if encoding == 1:
+        # Array data requires decompression, which is done in a separate thread if possible.
+        return (data, length, array_type, array_stride, array_byteswap), True
+    else:
+        return _create_array(data, length, array_type, array_stride, array_byteswap), False
+
+
+read_array_dict = {
+    b'b'[0]: lambda read: unpack_array(read, data_types.ARRAY_BOOL, 1, False),     # bool
+    b'c'[0]: lambda read: unpack_array(read, data_types.ARRAY_BYTE, 1, False),     # ubyte
+    b'i'[0]: lambda read: unpack_array(read, data_types.ARRAY_INT32, 4, True),     # int
+    b'l'[0]: lambda read: unpack_array(read, data_types.ARRAY_INT64, 8, True),     # long
+    b'f'[0]: lambda read: unpack_array(read, data_types.ARRAY_FLOAT32, 4, False),  # float
+    b'd'[0]: lambda read: unpack_array(read, data_types.ARRAY_FLOAT64, 8, False),  # double
+}
+
 read_data_dict = {
     b'Z'[0]: lambda read: unpack(b'<b', read(1))[0],  # byte
     b'Y'[0]: lambda read: unpack(b'<h', read(2))[0],  # 16 bit int
@@ -88,12 +126,6 @@ read_data_dict = {
     b'L'[0]: lambda read: unpack(b'<q', read(8))[0],  # 64 bit int
     b'R'[0]: lambda read: read(read_uint(read)),      # binary data
     b'S'[0]: lambda read: read(read_uint(read)),      # string data
-    b'f'[0]: lambda read: unpack_array(read, data_types.ARRAY_FLOAT32, 4, False),  # array (float)
-    b'i'[0]: lambda read: unpack_array(read, data_types.ARRAY_INT32, 4, True),   # array (int)
-    b'd'[0]: lambda read: unpack_array(read, data_types.ARRAY_FLOAT64, 8, False),  # array (double)
-    b'l'[0]: lambda read: unpack_array(read, data_types.ARRAY_INT64, 8, True),   # array (long)
-    b'b'[0]: lambda read: unpack_array(read, data_types.ARRAY_BOOL, 1, False),  # array (bool)
-    b'c'[0]: lambda read: unpack_array(read, data_types.ARRAY_BYTE, 1, False),  # array (ubyte)
     }
 
 
@@ -115,7 +147,7 @@ def init_version(fbx_version):
     _BLOCK_SENTINEL_DATA = (b'\0' * _BLOCK_SENTINEL_LENGTH)
 
 
-def read_elem(read, tell, use_namedtuple, tell_file_offset=0):
+def read_elem(read, tell, use_namedtuple, decompress_array_func, tell_file_offset=0):
     # [0] the offset at which this block ends
     # [1] the number of properties in the scope
     # [2] the length of the property list
@@ -133,7 +165,17 @@ def read_elem(read, tell, use_namedtuple, tell_file_offset=0):
 
     for i in range(prop_count):
         data_type = read(1)[0]
-        elem_props_data[i] = read_data_dict[data_type](read)
+        if data_type in read_array_dict:
+            val, needs_decompression = read_array_dict[data_type](read)
+            if needs_decompression:
+                # Array decompression releases the GIL, so can be multithreaded (if possible on the current system) for
+                # performance.
+                # After decompressing, the array is inserted into elem_props_data[i].
+                decompress_array_func(elem_props_data, i, val)
+            else:
+                elem_props_data[i] = val
+        else:
+            elem_props_data[i] = read_data_dict[data_type](read)
         elem_props_type[i] = data_type
 
     pos = tell()
@@ -176,7 +218,7 @@ def read_elem(read, tell, use_namedtuple, tell_file_offset=0):
 
         sub_pos = start_sub_pos
         while sub_pos < sub_tree_end:
-            elem_subtree.append(read_elem(read, tell, use_namedtuple, tell_file_offset))
+            elem_subtree.append(read_elem(read, tell, use_namedtuple, decompress_array_func, tell_file_offset))
             sub_pos = tell()
 
         # At the end of each subtree there should be a sentinel (an empty element with all bytes set to zero).
@@ -211,7 +253,8 @@ def parse_version(fn):
 def parse(fn, use_namedtuple=True):
     root_elems = []
 
-    with open(fn, 'rb') as f:
+    multithread_decompress_array_cm = MultiThreadedTaskConsumer.new_cpu_bound_cm(_decompress_and_insert_array)
+    with open(fn, 'rb') as f, multithread_decompress_array_cm as decompress_array_func:
         read = f.read
         tell = f.tell
 
@@ -222,7 +265,7 @@ def parse(fn, use_namedtuple=True):
         init_version(fbx_version)
 
         while True:
-            elem = read_elem(read, tell, use_namedtuple)
+            elem = read_elem(read, tell, use_namedtuple, decompress_array_func)
             if elem is None:
                 break
             root_elems.append(elem)

materials_utils/__init__.py

@@ -20,7 +20,7 @@
 bl_info = {
     "name": "Material Utilities",
     "author": "MichaleW, ChrisHinde",
-    "version": (2, 2, 1),
+    "version": (2, 2, 2),
     "blender": (3, 0, 0),
     "location": "View3D > Shift + Q key",
     "description": "Menu of material tools (assign, select..) in the 3D View",

materials_utils/functions.py

@@ -16,7 +16,7 @@ def mu_assign_material_slots(object, material_list):
     active_object = bpy.context.active_object
     bpy.context.view_layer.objects.active = object
 
-    for s in object.material_slots:
+    for _ in range(len(object.material_slots)):
         bpy.ops.object.material_slot_remove()
 
     # re-add them and assign material

node_wrangler/interface.py

@@ -361,7 +361,8 @@ class NWAttributeMenu(bpy.types.Menu):
         for obj in objs:
             if obj.data.attributes:
                 for attr in obj.data.attributes:
-                    attrs.append(attr.name)
+                    if not attr.is_internal:
+                        attrs.append(attr.name)
         attrs = list(set(attrs))  # get a unique list
 
         if attrs:

object_print3d_utils/__init__.py

@@ -5,7 +5,7 @@
 bl_info = {
     "name": "3D-Print Toolbox",
     "author": "Campbell Barton",
-    "blender": (3, 6, 0),
+    "blender": (4, 1, 0),
     "location": "3D View > Sidebar",
     "description": "Utilities for 3D printing",
     "doc_url": "{BLENDER_MANUAL_URL}/addons/mesh/3d_print_toolbox.html",

object_print3d_utils/export.py

@@ -106,13 +106,12 @@ def write_mesh(context, report_cb):
             addon_utils.enable(addon_id, default_set=False)
 
     if export_format == 'STL':
-        addon_ensure("io_mesh_stl")
         filepath = bpy.path.ensure_ext(filepath, ".stl")
-        ret = bpy.ops.export_mesh.stl(
+        ret = bpy.ops.wm.stl_export(
             filepath=filepath,
-            ascii=False,
-            use_mesh_modifiers=True,
-            use_selection=True,
+            ascii_format=False,
+            apply_modifiers=True,
+            export_selected_objects=True,
             global_scale=global_scale,
         )
     elif export_format == 'PLY':

space_view3d_pie_menus/pie_origin.py

@@ -43,6 +43,22 @@ class PIE_OT_PivotToSelection(Operator):
 
 # Pivot to Bottom
 
+def origin_to_bottom(ob):
+    if ob.type != 'MESH':
+        return
+
+    init = 0
+    for x in ob.data.vertices:
+        if init == 0:
+            a = x.co.z
+            init = 1
+        elif x.co.z < a:
+            a = x.co.z
+
+    for x in ob.data.vertices:
+        x.co.z -= a
+
+    ob.location.z += a
 
 class PIE_OT_PivotBottom(Operator):
     bl_idname = "object.pivotobottom"
@@ -59,19 +75,9 @@ class PIE_OT_PivotBottom(Operator):
     def execute(self, context):
         bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
         bpy.ops.object.origin_set(type='ORIGIN_GEOMETRY')
-        o = context.active_object
-        init = 0
-        for x in o.data.vertices:
-            if init == 0:
-                a = x.co.z
-                init = 1
-            elif x.co.z < a:
-                a = x.co.z
 
-        for x in o.data.vertices:
-            x.co.z -= a
-
-        o.location.z += a
+        for ob in context.selected_objects:
+            origin_to_bottom(ob)
 
         return {'FINISHED'}
 
@@ -93,19 +99,10 @@ class PIE_OT_PivotBottom_edit(Operator):
         bpy.ops.object.mode_set(mode='OBJECT')
         bpy.ops.object.transform_apply(location=True, rotation=True, scale=True)
         bpy.ops.object.origin_set(type='ORIGIN_GEOMETRY')
-        o = context.active_object
-        init = 0
-        for x in o.data.vertices:
-            if init == 0:
-                a = x.co.z
-                init = 1
-            elif x.co.z < a:
-                a = x.co.z
 
-        for x in o.data.vertices:
-            x.co.z -= a
+        for ob in context.selected_objects:
+            origin_to_bottom(ob)
 
-        o.location.z += a
         bpy.ops.object.mode_set(mode='EDIT')
 
         return {'FINISHED'}

vdm_brush_baker/__init__.py

@@ -77,7 +77,7 @@ class PT_VDMBaker(bpy.types.Panel):
     It also has settings for name (image, texture and brush at once), resolution, compression and color depth.
     """
     bl_label = 'VDM Brush Baker'
-    bl_idname = 'Editor_PT_LayoutPanel'
+    bl_idname = 'VDM_PT_bake_tools'
     bl_space_type = 'VIEW_3D'
     bl_region_type = 'UI'
     bl_category = 'Tool'