Can't start using Genesis: ValueError: too many values to unpack (expected 3)

[MRiabov]

Hello Genesis,
I'm trying to start experimenting with Genesis..
I've tried three different machines but I can't complete installation.

The error is:

Traceback (most recent call last):
  File "/workspace/RepairsComponents-v0/genesis-experiment.py", line 5, in <module>
    plane = scene.add_entity(gs.morphs.Plane())
  File "/venv/main/lib/python3.10/site-packages/genesis/utils/misc.py", line 38, in wrapper
    return method(self, *args, **kwargs)
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/scene.py", line 359, in add_entity
    entity = self._sim._add_entity(morph, material, surface, visualize_contact)
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/simulator.py", line 134, in _add_entity
    entity = self.rigid_solver.add_entity(self.n_entities, material, morph, surface, visualize_contact)
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/solvers/rigid/rigid_solver_decomp.py", line 64, in add_entity
    entity = entity_class(
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_entity.py", line 68, in __init__
    self._load_model()
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_entity.py", line 87, in _load_model
    self._load_primitive(self._morph, self._surface)
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_entity.py", line 189, in _load_primitive
    link._add_geom(
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_link.py", line 173, in _add_geom
    geom = RigidGeom(
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_geom.py", line 94, in __init__
    self._preprocess()
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_geom.py", line 146, in _preprocess
    sdf_val = self._compute_sd(query_points)
  File "/venv/main/lib/python3.10/site-packages/genesis/engine/entities/rigid_entity/rigid_geom.py", line 224, in _compute_sd
    sd, _, _ = igl.signed_distance(query_points, self._sdf_verts, self._sdf_faces)
ValueError: too many values to unpack (expected 3)

I don't know what's wrong.

What I've done:

• rent an instance with a GPU, 2060 and 2070S,
• pip install pytorch,
• pip install genesis-world,
• attempted run of the default code in the start of docs in both python and jupyter notebooks. gs.Scene(show_viewer=False) because I'm on SSH and X11 wasn't so straightforward.
  Code:

import genesis as gs
gs.init(backend=gs.cpu)

# Create a plane with explicit parameters
scene = gs.Scene(show_viewer=False)

# Add a plane
# plane = scene.add_entity(gs.morphs.Plane())

# Add a simple box instead of the Franka robot
box = scene.add_entity(
    gs.morphs.Box(size=(0.2, 0.2, 0.2), pos=(0, 0, 1.0))
)

scene.build()

for i in range(1000):
    scene.step()

Same happens on the local notebook.

How to fix? It should be straightforward.

Thank you.

[duburcqa]

Either downgrade libigl (pip install 'libigl<2.6") or install the main branch of Genesis following the README instructions. See issue #1156.

[MRiabov]

Yes, thank you. Just figured that out with ChatGPT.