materialx/nodes/__init__.py

@@ -2,18 +2,20 @@
 # Copyright 2022, AMD
 
 import importlib
-from pathlib import Path
 
 import bpy
 import nodeitems_utils
+import sys
 
 from . import node, categories, generate_node_classes, ui
-from ..utils import with_prefix
+from .. import utils
 
+
+sys.path.append(str(utils.ADDON_DATA_DIR))
 generate_node_classes.generate_basic_classes()
 
-gen_modules = [importlib.import_module(f"materialx.nodes.{f.name[:-len(f.suffix)]}")
-               for f in Path(__file__).parent.glob("gen_*.py")]
+gen_modules = [importlib.import_module(f"{utils.NODE_CLASSES_FOLDER}.{f.name[:-len(f.suffix)]}")
+               for f in utils.NODE_CLASSES_DIR.glob("gen_*.py")]
 
 mx_node_classes = []
 for mod in gen_modules:
@@ -44,11 +46,11 @@ def register():
     register_ui()
     register_nodes()
 
-    nodeitems_utils.register_node_categories(with_prefix("MX_NODES"), categories.get_node_categories())
+    nodeitems_utils.register_node_categories(utils.with_prefix("MX_NODES"), categories.get_node_categories())
 
 
 def unregister():
-    nodeitems_utils.unregister_node_categories(with_prefix("MX_NODES"))
+    nodeitems_utils.unregister_node_categories(utils.with_prefix("MX_NODES"))
 
     unregister_nodes()
     unregister_ui()

materialx/nodes/generate_node_classes.py

@@ -7,7 +7,7 @@ from collections import defaultdict
 import MaterialX as mx
 
 from .. import utils
-
+from ..utils import NODE_CLASSES_DIR
 from .. import logging
 log = logging.Log("nodes.generate_node_classes")
 
@@ -273,10 +273,10 @@ from bpy.props import (
     PointerProperty,
     FloatVectorProperty,
 ) 
-from .node import MxNode
+from materialx.nodes.node import MxNode
 
 
-FILE_PATH = r"{file_path.relative_to(utils.ADDON_ROOT_DIR)}"
+FILE_PATH = r"{file_path}"
 """)
 
     doc = mx.createDocument()
@@ -311,7 +311,8 @@ mx_node_classes = [{', '.join(mx_node_class_names)}]
 
 
 def generate_basic_classes():
-    gen_code_dir = utils.ADDON_ROOT_DIR / "nodes"
+    gen_code_dir = NODE_CLASSES_DIR
+    gen_code_dir.mkdir(exist_ok=True)
 
     files = [
         ('PBR', "PBR", utils.MX_LIBS_DIR / "bxdf/standard_surface.mtlx"),
@@ -332,3 +333,9 @@ def generate_basic_classes():
         log(f"Generating {module_file} from {file_path}")
         module_code = generate_classes_code(file_path, prefix, category)
         module_file.write_text(module_code)
+
+    module_file = gen_code_dir / "__init__.py"
+    module_file.write_text(
+"""# Automatically generated classes for MaterialX nodes.
+# Do not edit manually, changes will be overwritten.
+""")

materialx/utils.py

@@ -16,8 +16,14 @@ 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))
+
 MX_LIBS_FOLDER = "libraries"
-MX_LIBS_DIR = ADDON_ROOT_DIR / "libraries"
+MX_LIBS_DIR = ADDON_ROOT_DIR / MX_LIBS_FOLDER
+
+NODE_CLASSES_FOLDER = "materialx_nodes"
+NODE_CLASSES_DIR = ADDON_DATA_DIR / NODE_CLASSES_FOLDER
+
 
 os.environ['MATERIALX_SEARCH_PATH'] = str(MX_LIBS_DIR)
 
@@ -26,13 +32,13 @@ def with_prefix(name, separator='.', upper=False):
     return f"{ADDON_PREFIX.upper() if upper else ADDON_PREFIX}{separator}{name}"
 
 
-def title_str(str):
-    s = str.replace('_', ' ')
+def title_str(val):
+    s = val.replace('_', ' ')
     return s[:1].upper() + s[1:]
 
 
-def code_str(str):
-    return str.replace(' ', '_').replace('.', '_')
+def code_str(val):
+    return val.replace(' ', '_').replace('.', '_')
 
 
 def set_param_value(mx_param, val, nd_type, nd_output=None):