feat: many dims example

Author: seankmartin

examples/very_large_n_dims.py

@@ -0,0 +1,68 @@
+# @license
+# Copyright 2020 Google Inc.
+# 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 neuroglancer
+import numpy as np
+
+from neuroglancer_utils.layer_utils import add_render_panel
+from neuroglancer_utils.viewer_utils import (
+    launch_nglancer,
+    open_browser,
+    remove_axis_lines,
+    set_gpu_memory,
+    threedee_view,
+    update_projection,
+    update_title,
+)
+
+
+def add_image_layer(state, **kwargs):
+    dimensions = neuroglancer.CoordinateSpace(
+        names=["x", "y", "z", "qudfa", "energy", "distance", "time", "mass"],
+        units=("nm", "um", "", "s", "Hz", "m", "kHz", "us"),
+        scales=(4, 8, 2.4, 0.5, 1000, 10.5, 19.2, 0.0002),
+    )
+    generator = np.random.default_rng(0)
+    data = generator.random((20, 55, 10, 100, 10, 5, 2, 10))
+    local_volume = neuroglancer.LocalVolume(data, dimensions)
+    state.layers["image"] = neuroglancer.ImageLayer(
+        source=local_volume,
+        volume_rendering_mode="max",
+        tool_bindings={
+            "A": neuroglancer.VolumeRenderingGainTool(),
+        },
+        panels=[add_render_panel(side="right")],
+        **kwargs,
+    )
+
+
+def get_shader():
+    return """#uicontrol invlerp normalized(range=[0,255], clamp=true)
+void main() {
+    float val = normalized();
+    emitGrayscale(val);
+}
+"""
+
+
+if __name__ == "__main__":
+    viewer = launch_nglancer()
+    with viewer.txn() as s:
+        add_image_layer(s, shader=get_shader())
+    threedee_view(viewer)
+    remove_axis_lines(viewer)
+    update_title(viewer, "Large example")
+    set_gpu_memory(viewer, gpu_memory=2)
+    update_projection(viewer, orientation=[0.25, 0.6, 0.65, 0.3])
+    open_browser(viewer, hang=True)