Setting Up Your First Scene

This tutorial shows you how to setup a scene like below. We teach you how to:

• Setup a vuer server

• Add a 3D scene to the server

• Add a SpotLight to the scene

• Add a Box to the scene

• Add a Movable component to move the box around

– The Batteries🔋 Are Included!

Vuer has two main components: the server and the client. You will interact with the 3D scene via the python vuer app.

We start by instantiating a vuer server.

from vuer import Vuer

app = Vuer(
    # These query parameters show up in the URL, and are used to configure the scene.
    queries=dict(
        reconnect=True,
        collapseMenu=True,
    ),
)

Now, to start the vuer server, you can run:

app.run()

And this generates the following output:

Serving file:///Users/you/mit/vuer/docs/tutorials/basics at /static
Visit: https://vuer.ai?ws=ws://localhost:8012&reconnect=True

Note, app.run is blocking. In other words, this should be the last thing you run in your script.

Congratulations! Now you have a vuer server running locally.

Adding a 3D Scene

To add a 3D Scene, you neet to use the set operator to add a Scene object to the vuer app.

Before we do that, note that vuer client connects to the vuer python server via a websocket session. Each server can handle multiple sessions, which means that we need to wrap each session in an async function, where the life cyle of the session corresponds to the procedures inside this function:

import asyncio
from vuer import VuerSession
from vuer.schemas import Scene, Box, SpotLight, Movable

# The spawn decorator is used to bind this async function to the websocket session.
# We instantiated the app earlier.
@app.spawn
async def session(sess: VuerSession):
    print("Example: we have started a websocket session!")

    # Add the scene to the vuer app
    sess.set @ Scene(
        Box(
            args=[0.1, 0.1, 0.1, 101, 101, 101],
            position=[0, 0.05, 0],
            color="red",
            materialType="standard",
            material=dict(color="#23aaff"),
            key="fox-1",
        ),
        Movable(
            SpotLight(
                intensity=10,
                key="light-1",
            ),
            position=[-0.25, 0.375, 0.125],
            scale=0.15,
            key="handle-1",
        ),
        # this is to define the up direction of the scene. Default to y up (0, 1, 0)
        up=[0, 1, 0],
        # this collapses the memu by default.
        collapseMenu=True,
    )
    # you need to await to let vuer send the Scene component up
    # to the client!
    await asyncio.sleep(0.0)

Now at the end of your script, launch the app:

# Run the app
app.run()

And this should give the scene shown at the beginning: