2d interactivity with physics simulation in the background

napari_interactive_sim.py

from time import sleep

import napari
import numpy as np
from napari.qt.threading import thread_worker

viewer = napari.Viewer()
bbox_layer = viewer.add_points(
    [[-1, -1], [-1, 1], [1, -1], [1, 1]], face_color='green')
points_layer = viewer.add_points([0, 0], face_color='magenta')


@thread_worker
def move_point_towards_center():
    while True:
        sleep(1 / 60)
        current_position = np.array(points_layer.data, dtype=float)
        points_layer.data = current_position - current_position / 10
    return


worker = move_point_towards_center()
worker.start()

napari.run()