Hello world
===========

The simplest possible viser program: creates a server and adds a red sphere.

This demonstrates the two essential steps to get started with viser:

1. Create a :class:`viser.ViserServer` instance, which starts a web server at http://localhost:8080
2. Add 3D content using the scene API, like :meth:`viser.SceneApi.add_icosphere`

The server runs indefinitely until interrupted with Ctrl+C.

**Source:** ``examples/00_getting_started/00_hello_world.py``

.. figure:: ../../_static/examples/00_getting_started_00_hello_world.png
   :width: 100%
   :alt: Hello world

Code
----

.. code-block:: python
   :linenos:

   import time
   
   import viser
   
   
   def main():
       server = viser.ViserServer()
       server.scene.add_icosphere(
           name="hello_sphere",
           radius=0.5,
           color=(255, 0, 0),  # Red
           position=(0.0, 0.0, 0.0),
       )
   
       print("Open your browser to http://localhost:8080")
       print("Press Ctrl+C to exit")
   
       while True:
           time.sleep(10.0)
   
   
   if __name__ == "__main__":
       main()