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, 100 insertions, 0 deletions

diff --git a/io_scene_gltf2/blender/exp/gltf2_blender_export.py b/io_scene_gltf2/blender/exp/gltf2_blender_export.py
new file mode 100755
index 00000000..ae2db26b
--- /dev/null
+++ b/io_scene_gltf2/blender/exp/gltf2_blender_export.py
@@ -0,0 +1,100 @@
+# 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 sys
+import traceback
+
+from . import gltf2_blender_export_keys
+from . import gltf2_blender_gather
+from .gltf2_blender_gltf2_exporter import GlTF2Exporter
+from ..com import gltf2_blender_json
+from ...io.exp import gltf2_io_export
+from ...io.com.gltf2_io_debug import print_console, print_newline
+
+
+def save(operator,
+         context,
+         export_settings):
+    """Start the glTF 2.0 export and saves to content either to a .gltf or .glb file."""
+    print_console('INFO', 'Starting glTF 2.0 export')
+    context.window_manager.progress_begin(0, 100)
+    context.window_manager.progress_update(0)
+
+    if not export_settings[gltf2_blender_export_keys.COPYRIGHT]:
+        export_settings[gltf2_blender_export_keys.COPYRIGHT] = None
+
+    scenes, animations = gltf2_blender_gather.gather_gltf2(export_settings)
+    exporter = GlTF2Exporter(copyright=export_settings[gltf2_blender_export_keys.COPYRIGHT])
+    for scene in scenes:
+        exporter.add_scene(scene)
+    for animation in animations:
+        exporter.add_animation(animation)
+
+    buffer = bytes()
+    if export_settings[gltf2_blender_export_keys.FORMAT] == 'ASCII':
+        # .gltf
+        if export_settings[gltf2_blender_export_keys.EMBED_BUFFERS]:
+            exporter.finalize_buffer(export_settings[gltf2_blender_export_keys.FILE_DIRECTORY])
+        else:
+            exporter.finalize_buffer(export_settings[gltf2_blender_export_keys.FILE_DIRECTORY],
+                                     export_settings[gltf2_blender_export_keys.BINARY_FILENAME])
+    else:
+        # .glb
+        buffer = exporter.finalize_buffer(export_settings[gltf2_blender_export_keys.FILE_DIRECTORY], is_glb=True)
+    exporter.finalize_images(export_settings[gltf2_blender_export_keys.FILE_DIRECTORY])
+    glTF = exporter.glTF
+
+    #
+
+    # TODO: move to custom JSON encoder
+    def dict_strip(obj):
+        o = obj
+        if isinstance(obj, dict):
+            o = {}
+            for k, v in obj.items():
+                if v is None:
+                    continue
+                elif isinstance(v, list) and len(v) == 0:
+                    continue
+                o[k] = dict_strip(v)
+        elif isinstance(obj, list):
+            o = []
+            for v in obj:
+                o.append(dict_strip(v))
+        elif isinstance(obj, float):
+            # force floats to int, if they are integers (prevent INTEGER_WRITTEN_AS_FLOAT validator warnings)
+            if int(obj) == obj:
+                return int(obj)
+        return o
+
+    try:
+        gltf2_io_export.save_gltf(dict_strip(glTF.to_dict()), export_settings, gltf2_blender_json.BlenderJSONEncoder,
+                                  buffer)
+    except AssertionError as e:
+        _, _, tb = sys.exc_info()
+        traceback.print_tb(tb)  # Fixed format
+        tb_info = traceback.extract_tb(tb)
+        for tbi in tb_info:
+            filename, line, func, text = tbi
+            print_console('ERROR', 'An error occurred on line {} in statement {}'.format(line, text))
+        print_console('ERROR', str(e))
+        raise e
+
+    print_console('INFO', 'Finished glTF 2.0 export')
+    context.window_manager.progress_end()
+    print_newline()
+
+    return {'FINISHED'}
+