materialx/__init__.py

@@ -18,7 +18,7 @@ bl_info = {
     "category": "Material",
 }
 
-ADDON_PREFIX = "materialx"
+ADDON_ALIAS = "materialx"
 
 
 import bpy

materialx/logging.py

@@ -4,13 +4,13 @@
 import sys
 import logging.handlers
 
-from . import ADDON_PREFIX
+from . import ADDON_ALIAS
 
 
 FORMAT_STR = "%(asctime)s %(levelname)s %(name)s [%(thread)d]:  %(message)s"
 
 # root logger for the addon
-logger = logging.getLogger(ADDON_PREFIX)
+logger = logging.getLogger(ADDON_ALIAS)
 logger.setLevel('DEBUG')
 
 # file_handler = logging.handlers.RotatingFileHandler(PLUGIN_ROOT_DIR / 'usdhydra.log',

materialx/matlib/ui.py

@@ -10,9 +10,7 @@ import bpy
 
 from .. import utils
 from ..node_tree import MxNodeTree
-from ..utils import mx as mx_utils
 from .manager import manager
-#from .. import config
 
 from ..utils import logging
 log = logging.Log('matlib.ui')
@@ -24,7 +22,7 @@ class MATERIAL_OP_matlib_clear_search(bpy.types.Operator):
     bl_label = ""
 
     def execute(self, context):
-        context.window_manager.materialx.matlib.search = ''
+        utils.mx_properties(context.window_manager).matlib.search = ''
         return {"FINISHED"}
 
 
@@ -44,23 +42,23 @@ class MATLIB_OP_import_material(bpy.types.Operator):
     bl_label = "Import Material Package"
 
     def execute(self, context):
-        matlib_prop = context.window_manager.materialx.matlib
+        matlib_prop = utils.mx_properties(context.window_manager).matlib
         package = matlib_prop.package
 
         mtlx_file = package.unzip()
 
         # getting/creating MxNodeTree
         bl_material = context.material
-        mx_node_tree = bl_material.materialx.mx_node_tree
-        if not bl_material.materialx.mx_node_tree:
+        mx_node_tree = utils.mx_properties(bl_material).mx_node_tree
+        if not mx_node_tree:
             mx_node_tree = bpy.data.node_groups.new(f"MX_{bl_material.name}",
                                                     type=MxNodeTree.bl_idname)
-            bl_material.materialx.mx_node_tree = mx_node_tree
+            utils.mx_properties(bl_material).mx_node_tree = mx_node_tree
 
         log(f"Reading: {mtlx_file}")
         doc = mx.createDocument()
         search_path = mx.FileSearchPath(str(mtlx_file.parent))
-        search_path.append(str(mx_utils.MX_LIBS_DIR))
+        search_path.append(str(utils.MX_LIBS_DIR))
         try:
             mx.readFromXmlFile(doc, str(mtlx_file), searchPath=search_path)
             mx_node_tree.import_(doc, mtlx_file)
@@ -78,7 +76,7 @@ class MATLIB_OP_load_package(bpy.types.Operator):
     bl_label = "Download Package"
 
     def execute(self, context):
-        matlib_prop = context.window_manager.materialx.matlib
+        matlib_prop = utils.mx_properties(context.window_manager).matlib
         manager.load_package(matlib_prop.package)
 
         return {"FINISHED"}
@@ -94,7 +92,7 @@ class MATLIB_PT_matlib(bpy.types.Panel):
 
     def draw(self, context):
         layout = self.layout
-        matlib_prop = context.window_manager.materialx.matlib
+        matlib_prop = utils.mx_properties(context.window_manager).matlib
 
         manager.check_load_materials()
 

materialx/nodes/generate_node_classes.py

@@ -7,7 +7,8 @@ from collections import defaultdict
 import MaterialX as mx
 
 from .. import utils
-from ..utils import NODE_CLASSES_DIR
+from .. import ADDON_ALIAS
+
 from .. import logging
 log = logging.Log("nodes.generate_node_classes")
 
@@ -273,7 +274,7 @@ from bpy.props import (
     PointerProperty,
     FloatVectorProperty,
 ) 
-from materialx.nodes.node import MxNode
+from {ADDON_ALIAS}.nodes.node import MxNode
 
 
 FILE_PATH = r"{file_path}"
@@ -311,7 +312,7 @@ mx_node_classes = [{', '.join(mx_node_class_names)}]
 
 
 def generate_basic_classes():
-    gen_code_dir = NODE_CLASSES_DIR
+    gen_code_dir = utils.NODE_CLASSES_DIR
     gen_code_dir.mkdir(exist_ok=True)
 
     files = [

materialx/utils.py

@@ -9,14 +9,14 @@ import shutil
 import MaterialX as mx
 import bpy
 
-from . import ADDON_PREFIX
+from . import ADDON_ALIAS
 
 from . import logging
 log = logging.Log('utils')
 
 
 ADDON_ROOT_DIR = Path(__file__).parent
-ADDON_DATA_DIR = Path(bpy.utils.user_resource("SCRIPTS", path=f"addons/{ADDON_PREFIX}", create=True))
+ADDON_DATA_DIR = Path(bpy.utils.user_resource("SCRIPTS", path=f"addons/{ADDON_ALIAS}", create=True))
 
 MX_LIBS_FOLDER = "libraries"
 MX_LIBS_DIR = ADDON_ROOT_DIR / MX_LIBS_FOLDER
@@ -31,7 +31,7 @@ os.environ['MATERIALX_SEARCH_PATH'] = str(MX_LIBS_DIR)
 
 
 def with_prefix(name, separator='.', upper=False):
-    return f"{ADDON_PREFIX.upper() if upper else ADDON_PREFIX}{separator}{name}"
+    return f"{ADDON_ALIAS.upper() if upper else ADDON_ALIAS}{separator}{name}"
 
 
 def title_str(val):
@@ -396,7 +396,7 @@ class MaterialXProperties(bpy.types.PropertyGroup):
 
     @classmethod
     def register(cls):
-        setattr(cls.bl_type, "materialx", bpy.props.PointerProperty(
+        setattr(cls.bl_type, ADDON_ALIAS, bpy.props.PointerProperty(
             name="MaterialX properties",
             description="MaterialX properties",
             type=cls,
@@ -404,4 +404,8 @@ class MaterialXProperties(bpy.types.PropertyGroup):
 
     @classmethod
     def unregister(cls):
-        delattr(cls.bl_type, "materialx")
+        delattr(cls.bl_type, ADDON_ALIAS)
+
+
+def mx_properties(obj):
+    return getattr(obj, ADDON_ALIAS)