glTF draco compression support (#209)

* glTF draco compression support

* Read dracu data the extension's own bufferview

* Alert user when dracopy is not installed

* Bump version

.gitignore

@@ -8,33 +8,20 @@ __pycache__/
 *.dll
 
 # Distribution / packaging
-.Python
 build/
-develop-eggs/
 dist/
-downloads/
-eggs/
-.eggs/
 lib/
 lib64/
-parts/
-sdist/
-var/
-wheels/
 *.egg-info/
-.installed.cfg
 *.egg
 
 # Unit test / coverage reports
 htmlcov/
-.tox/
 .coverage
 .coverage.*
 .cache
-nosetests.xml
 coverage.xml
 *.cover
-.hypothesis/
 .pytest_cache/
 
 # Sphinx documentation
@@ -43,26 +30,12 @@ docs/_build/
 # IDEs
 .vscode
 .idea/
-.spyproject/
 
 # Environments
-.env
-.venv
-.venv35
-.venv36
-.venv37
-.venv38
-env/
-venv/
-ENV/
-env.bak/
-venv.bak/
+.venv*
 
 # Misc local
-/test.py
 .mypy_cache
-/random_fun/
 imgui.ini
 .DS_Store
-/temp/
-video_rec.py
+/tmp/

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 3.1.0
+
+* Support for daco compressed meshes in glTF2 files
+
 ## 3.0.3
 
 * Fixed a potential division by zero issue in timers

docs/conf.py

@@ -60,7 +60,7 @@ def __getattr__(cls: Any, name: Any) -> MagicMock:
 author = "Einar Forselv"
 
 # The short X.Y version
-version = "3.0.3"
+version = "3.1.0"
 # The full version, including alpha/beta/rc tags
 release = version
 

examples/gltf_scenes.py

@@ -4,11 +4,10 @@
 import moderngl
 from base import CameraWindow
 
-import moderngl_window as mglw
 from moderngl_window.scene.camera import KeyboardCamera
 
 
-class CubeModel(CameraWindow):
+class GLTFTest(CameraWindow):
     """
     In oder for this example to work you need to clone the gltf
     model samples repository and ensure resource_dir is set correctly:
@@ -19,11 +18,16 @@ class CubeModel(CameraWindow):
     window_size = 1280, 720
     aspect_ratio = None
     resource_dir = Path(__file__, "../../../glTF-Sample-Models/2.0").resolve()
+    # resource_dir = Path(__file__, "../../tmp/issue_with_draco").resolve()
 
     def __init__(self, **kwargs):
         super().__init__(**kwargs)
         self.wnd.mouse_exclusivity = True
 
+        # self.scene = self.load_scene(
+        #   "0147_858530.6583696686_-5537397.529199226_3036197.2162786936.glb", kind="gltf"
+        # )
+
         # --- glTF-Sample-Models ---
         # self.scene = self.load_scene("2CylinderEngine/glTF-Binary/2CylinderEngine.glb")
         # self.scene = self.load_scene("CesiumMilkTruck/glTF-Embedded/CesiumMilkTruck.gltf")
@@ -61,6 +65,12 @@ def __init__(self, **kwargs):
         # self.scene = self.load_scene("VertexColorTest/glTF/VertexColorTest.gltf")
         # self.scene = self.load_scene("WaterBottle/glTF/WaterBottle.gltf")
 
+        # --- Draco compressed ---
+        # self.scene = self.load_scene("Box/glTF-Draco/Box.gltf")
+        # self.scene = self.load_scene("Buggy/glTF-Draco/Buggy.gltf")
+        # self.scene = self.load_scene("2CylinderEngine/glTF-Draco/2CylinderEngine.gltf")
+        # self.scene = self.load_scene("CesiumMilkTruck/glTF-Draco/CesiumMilkTruck.gltf")
+
         self.camera = KeyboardCamera(
             self.wnd.keys,
             fov=75.0,
@@ -75,34 +85,35 @@ def __init__(self, **kwargs):
         # if self.scene.diagonal_size > 0:
         #     self.camera.velocity = self.scene.diagonal_size / 5.0
 
+        self.camera.position = (
+            self.scene.get_center()
+            + glm.vec3(0.0, 0.0, self.scene.diagonal_size / 1.75)
+        )
+
     def on_render(self, time: float, frame_time: float):
         """Render the scene"""
         self.ctx.enable_only(moderngl.DEPTH_TEST | moderngl.CULL_FACE)
 
-        # Move camera in on the z axis slightly by default
-        translation = glm.translate(glm.vec3(0, 0, -1.5))
-        camera_matrix = self.camera.matrix * translation
-
         self.scene.draw(
             projection_matrix=self.camera.projection.matrix,
-            camera_matrix=camera_matrix,
+            camera_matrix=self.camera.matrix,
             time=time,
         )
 
-        # Draw bounding boxes
+        # # Draw bounding boxes
         # self.scene.draw_bbox(
         #     projection_matrix=self.camera.projection.matrix,
-        #     camera_matrix=camera_matrix,
+        #     camera_matrix=self.camera.matrix,
         #     children=True,
         #     color=(0.75, 0.75, 0.75),
         # )
 
         # self.scene.draw_wireframe(
         #     projection_matrix=self.camera.projection.matrix,
-        #     camera_matrix=camera_matrix,
+        #     camera_matrix=self.camera.matrix,
         #     color=(1, 1, 1, 1),
         # )
 
 
 if __name__ == "__main__":
-    mglw.run_window_config(CubeModel)
+    GLTFTest.run()

moderngl_window/__init__.py

@@ -19,7 +19,7 @@
 from moderngl_window.utils.keymaps import AZERTY, QWERTY, KeyMap, KeyMapFactory  # noqa
 from moderngl_window.utils.module_loading import import_string
 
-__version__ = "3.0.3"
+__version__ = "3.1.0"
 
 IGNORE_DIRS = [
     "__pycache__",