example_annotation_properties.py

import argparse

import neuroglancer
import neuroglancer.cli

if __name__ == "__main__":
    ap = argparse.ArgumentParser()
    neuroglancer.cli.add_server_arguments(ap)
    args = ap.parse_args()
    neuroglancer.cli.handle_server_arguments(args)
    viewer = neuroglancer.Viewer()
    with viewer.txn() as s:
        s.dimensions = neuroglancer.CoordinateSpace(
            names=["x", "y"], units="nm", scales=[1, 1]
        )
        s.position = [150, 150]
        s.layers.append(
            name="a",
            layer=neuroglancer.LocalAnnotationLayer(
                dimensions=s.dimensions,
                annotation_properties=[
                    neuroglancer.AnnotationPropertySpec(
                        id="color",
                        type="rgb",
                        default="red",
                    ),
                    neuroglancer.AnnotationPropertySpec(
                        id="size",
                        type="float32",
                        default=10,
                    ),
                    neuroglancer.AnnotationPropertySpec(
                        id="p_int8",
                        type="int8",
                        default=10,
                    ),
                    neuroglancer.AnnotationPropertySpec(
                        id="p_uint8",
                        type="uint8",
                        default=10,
                    ),
                ],
                annotations=[
                    neuroglancer.PointAnnotation(
                        id="1",
                        point=[150, 150],
                        props=["#0f0", 5, 6, 7],
                    ),
                    neuroglancer.PointAnnotation(
                        id="2",
                        point=[250, 100],
                        props=["#ff0", 30, 7, 9],
                    ),
                ],
                shader="""
void main() {
  setColor(prop_color());
  setPointMarkerSize(prop_size());
}
""",
            ),
        )
        s.layout = "xy"
        s.selected_layer.layer = "a"
    print("Use `Control+right click` to display annotation details.")
    print(viewer)