Initial commit of glTF 2.0 importer/exporter

Official Khronos Group Blender glTF 2.0 importer and exporter.

glTF specification: https://github.com/KhronosGroup/glTF
The upstream repository can be found here:
https://github.com/KhronosGroup/glTF-Blender-IO

Reviewed By: Bastien, Campbell

Differential Revision: https://developer.blender.org/D3929

1 files changed, 63 insertions, 0 deletions

diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_gather.py b/io_scene_gltf2/blender/exp/gltf2_blender_gather.py
new file mode 100755
index 00000000..6f4f3b1e
--- /dev/null
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_gather.py
@@ -0,0 +1,63 @@
+# 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
+
+from io_scene_gltf2.io.com import gltf2_io
+from io_scene_gltf2.blender.exp import gltf2_blender_gather_nodes
+from io_scene_gltf2.blender.exp import gltf2_blender_gather_animations
+from io_scene_gltf2.blender.exp.gltf2_blender_gather_cache import cached
+
+
+def gather_gltf2(export_settings):
+    """
+    Gather glTF properties from the current state of blender.
+
+    :return: list of scene graphs to be added to the glTF export
+    """
+    scenes = []
+    animations = []  # unfortunately animations in gltf2 are just as 'root' as scenes.
+    for blender_scene in bpy.data.scenes:
+        scenes.append(__gather_scene(blender_scene, export_settings))
+        animations += __gather_animations(blender_scene, export_settings)
+
+    return scenes, animations
+
+
+@cached
+def __gather_scene(blender_scene, export_settings):
+    scene = gltf2_io.Scene(
+        extensions=None,
+        extras=None,
+        name=blender_scene.name,
+        nodes=[]
+    )
+
+    for blender_object in blender_scene.objects:
+        if blender_object.parent is None:
+            node = gltf2_blender_gather_nodes.gather_node(blender_object, export_settings)
+            if node is not None:
+                scene.nodes.append(node)
+
+    # TODO: lights
+
+    return scene
+
+
+def __gather_animations(blender_scene, export_settings):
+    animations = []
+    for blender_object in blender_scene.objects:
+        animations += gltf2_blender_gather_animations.gather_animations(blender_object, export_settings)
+    return animations
+