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3ab4691 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | """Shared serialization for the tiny-vocab physics MoE.
Reuses physics_core.fmt_header / fmt_frame, but reduces every frame's
free-text description to a tiny controlled keyword set so the learned vocab
stays simulation-only.
Controlled description set (after the `Frame N:` token):
- "at rest" <- "All objects are at rest."
- "in motion" <- "All objects are in motion."
- "settling" <- "K of N objects are moving." (partial motion)
Anything else -> dropped (description omitted; frame still emitted).
"""
from __future__ import annotations
import re
import physics_core as pc
_AT_REST = re.compile(r"all objects are at rest", re.I)
_IN_MOTION = re.compile(r"all objects are in motion", re.I)
_PARTIAL = re.compile(r"\d+\s+of\s+\d+\s+objects are moving", re.I)
def reduce_desc(raw: str) -> str:
"""Map a frame's free-text description to a controlled keyword (or '')."""
if _AT_REST.search(raw):
return "at rest"
if _IN_MOTION.search(raw):
return "in motion"
if _PARTIAL.search(raw):
return "settling"
return ""
def fmt_frame_reduced(fr: dict) -> str:
"""Like pc.fmt_frame but with the description replaced by a keyword."""
fr2 = dict(fr)
fr2["description"] = reduce_desc(fr.get("description", ""))
return pc.fmt_frame(fr2)
def fmt_header_reduced(header: dict) -> str:
"""pc.fmt_header with the free-text Scene description blanked out.
Keeps every structural line (Gravity / Timestep / Type / Difficulty /
Static / Constraints) so the categorical `Type:` token survives, but the
`Scene:` line carries no English prose -> vocab stays sim-only.
"""
h2 = dict(header)
h2["description"] = ""
return pc.fmt_header(h2)
def serialize_scene(header: dict, frames: list) -> str:
"""Full scene text: reduced header + reduced frames (no trailing BOS/EOS)."""
txt = fmt_header_reduced(header)
txt += "".join(fmt_frame_reduced(fr) for fr in frames)
return txt
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