PhysicsScenes

Anonymous submission for ICML 2026: "PhysicsLM: Autoregressive Language Modeling of 2D Rigid Body Dynamics"

Dataset Description

900K 2D rigid-body physics scenes generated with Pymunk (Chipmunk2D), across 30 scenario types in 6 physical categories.

Statistics

Split	Scenes	Scenario types	Seeds
Train	900,000	24 (seen)	1,000,000+
Val	100,020	30 (all)	5,000,000+
OOD (val)	20,004	6 (held-out)	5,000,000+

Total size: ~582 GB uncompressed. Due to size, this repository contains metadata and a 1,000-scene sample. Full dataset available on request.

Format

Each scene is a JSONL file with 1 header line + 200 frame lines:

{"type": "header", "scenario": "billiards", "difficulty": 2, ...}
{"type": "frame", "frame": 0, "objects": [{"id": 0, "position": {"x": 400.0, "y": 300.0}, "velocity": {"x": -100.0, "y": 0.0}, ...}], ...}
...

Scenario categories

• Collision (5 types): billiards, bowling, head_on, explosion, projectile
• Stacking (5 types): pyramid, tower, jenga, dominos, bridge
• Ramp (5 types): ramp_roll, ski_jump, marble_run, avalanche, plinko
• Constraint (5 types): pendulum, chain, seesaw, wrecking_ball, orbit
• Minigame (5 types): basketball, conveyor, pong, wind, breakout
• Complex (4 types, OOD only): angry_birds, hourglass, newtons_cradle, pinball

Model

anonsubmiticml2026/PhysicsLM

Code

anonsubmiticml2026/physics-llm-paper