1 files changed, 89 insertions, 0 deletions
diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_search_scene.py b/io_scene_gltf2/blender/exp/gltf2_blender_search_scene.py
new file mode 100755
index 00000000..0fa7db6e
--- /dev/null
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_search_scene.py
@@ -0,0 +1,89 @@
+# Copyright 2018 The glTF-Blender-IO authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import bpy
+import typing
+
+
+class Filter:
+    """Base class for all node tree filter operations."""
+
+    def __call__(self, obj: bpy.types.Object):
+        return True
+
+
+class ByName(Filter):
+    """
+    Filter the objects by name.
+
+    example usage:
+    find_objects(FilterByName("Cube"))
+    """
+
+    def __init__(self, name):
+        self.name = name
+
+    def __call__(self, obj: bpy.types.Object):
+        return obj.name == self.name
+
+
+class ByDataType(Filter):
+    """Filter the scene objects by their data type."""
+
+    def __init__(self, data_type: str):
+        self.type = data_type
+
+    def __call__(self, obj: bpy.types.Object):
+        return obj.type == self.type
+
+
+class ByDataInstance(Filter):
+    """Filter the scene objects by a specific ID instance."""
+
+    def __init__(self, data_instance: bpy.types.ID):
+        self.data = data_instance
+
+    def __call__(self, obj: bpy.types.Object):
+        return self.data == obj.data
+
+
+def find_objects(object_filter: typing.Union[Filter, typing.Callable]):
+    """
+    Find objects in the scene where the filter expression is true.
+
+    :param object_filter: should be a function(x: object) -> bool
+    :return: a list of shader nodes for which filter is true
+    """
+    results = []
+    for obj in bpy.context.scene.objects:
+        if object_filter(obj):
+            results.append(obj)
+    return results
+
+
+def find_objects_from(obj: bpy.types.Object, object_filter: typing.Union[Filter, typing.Callable]):
+    """
+    Search for objects matching a filter function below a specified object.
+
+    :param obj: the starting point of the search
+    :param object_filter: a function(x: object) -> bool
+    :return: a list of objects which passed the filter
+    """
+    results = []
+    if object_filter(obj):
+        results.append(obj)
+    for child in obj.children:
+        results += find_objects_from(child, object_filter)
+    return results
+