Trimesh#

This example shows you how to load mesh files in various ways, and how to update the mesh in real-time.

from asyncio import sleep
from pathlib import Path

import numpy as np
import trimesh

from vuer import Vuer
from vuer.events import Set
from vuer.schemas import Obj, DefaultScene, TriMesh, SceneBackground

assets_folder = Path(__file__).parent / "../../assets"
test_file = "static_3d/armadillo_midres.obj"

mesh = trimesh.load_mesh(assets_folder / test_file)
assert isinstance(mesh, trimesh.Trimesh)
mesh.apply_scale(0.1)

# from trimesh import util
with open(assets_folder / test_file, "rb") as f:
    data = f.read()
    text = trimesh.util.decode_text(data)

app = Vuer(static_root=assets_folder)

print(f"Loaded mesh with {mesh.vertices.shape} vertices and {mesh.faces.shape} faces")


# use `start=True` to start the app immediately
@app.spawn(start=True)
async def main(session):
    session @ Set(
        DefaultScene(
            SceneBackground(),
            Obj(
                key="src-loader",
                src="http://localhost:8012/static/" + test_file,
                position=[3, 0, 0],
            ),
            Obj(key="buff-loader", buff=data, position=[1, 0, 0], scale=0.3),
            Obj(
                key="text-loader",
                text=text,
                position=[1, 0, 1],
                scale=0.3,
                materialType="depth",
            ),
            TriMesh(
                key="trimesh",
                vertices=np.array(mesh.vertices),
                faces=np.array(mesh.faces),
                position=[0, 0, 0],
                color="#23aaff",
                materialType="depth",
            ),
            TriMesh(
                key="wireframe",
                vertices=np.array(mesh.vertices),
                faces=np.array(mesh.faces),
                wireframe=True,
                position=[-0.3, 0, 0],
                color="yellow",
            ),
            # y-up
            up=[0, 1, 0],
        ),
    )

    i = 0
    while True:
        i += 1
        x, z = 0.3 * np.sin(i / 10), 0.3 * np.cos(i / 10)
        session.update @ TriMesh(
            key="trimesh",
            vertices=np.array(mesh.vertices),
            faces=np.array(mesh.faces),
            position=[x, 0, z],
            color="#23aaff",
        )
        await sleep(0.016)