feat: add allen multichan to local data

Author: seankmartin

examples/serve_default_dir.py

@@ -1,8 +1,10 @@
 from neuroglancer_utils.create_datasets.create_full_cube import create_cube
 from neuroglancer_utils.create_datasets.create_sphere import create_sphere
+from neuroglancer_utils.create_datasets.create_allen_multi import create_allen_multi
 from neuroglancer_utils.local_server import create_server
 
 create_cube()
 create_sphere()
+create_allen_multi()
 create_server(directory="datasets")
 input("Press enter to continue")

neuroglancer_utils/create_datasets/create_allen_multi.py

@@ -0,0 +1,18 @@
+from skimage.data import cells3d
+
+from cloudvolume import CloudVolume
+import numpy as np
+
+
+def create_allen_multi(output_path="file://datasets/allen"):
+    data = cells3d()
+    data = np.moveaxis(data, [0, 1, 2, 3], [2, 3, 1, 0])
+    CloudVolume.from_numpy(
+        data,
+        vol_path=output_path,
+        resolution=(40, 40, 40),
+        chunk_size=(128, 128, 64),
+        layer_type="image",
+        progress=True,
+        compress=False,
+    )