feat: polyline example

Author: seankmartin

examples/add_polylines.py

@@ -0,0 +1,66 @@
+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.PolyLineAnnotation(
+                        id="1",
+                        points=[[150, 150], [200, 100], [30, 40]],
+                        props=["#0f0", 5, 6, 7],
+                    ),
+                    neuroglancer.PolyLineAnnotation(
+                        id="2",
+                        points=[[250, 100], [20, 20]],
+                        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)