Camera poses

Example showing how we can detect new clients and read camera poses from them.

import time

import viser

server = viser.ViserServer()
server.scene.world_axes.visible = True


@server.on_client_connect
def _(client: viser.ClientHandle) -> None:
    print("new client!")

    # This will run whenever we get a new camera!
    @client.camera.on_update
    def _(_: viser.CameraHandle) -> None:
        print(f"New camera on client {client.client_id}!")

    # Show the client ID in the GUI.
    gui_info = client.gui.add_text("Client ID", initial_value=str(client.client_id))
    gui_info.disabled = True


while True:
    # Get all currently connected clients.
    clients = server.get_clients()
    print("Connected client IDs", clients.keys())

    for id, client in clients.items():
        print(f"Camera pose for client {id}")
        print(f"\twxyz: {client.camera.wxyz}")
        print(f"\tposition: {client.camera.position}")
        print(f"\tfov: {client.camera.fov}")
        print(f"\taspect: {client.camera.aspect}")
        print(f"\tlast update: {client.camera.update_timestamp}")

    time.sleep(2.0)