Beam splitting demo

See Panels, layer clocks, and temporary overlays for the complete composition guide and controls.

Falling beams on an original public fixture, with independently paced layers.

Run python -m bruhanimate.demos.beam_demo. Space pauses the solver, n/right steps, +/- changes solver speed, and q quits. Snow and the introductory overlay keep advancing while the solver is paused. No files or puzzle inputs are needed.

class bruhanimate.demos.beam_demo.BeamState(active: frozenset[tuple[int, int]], visited: frozenset[tuple[int, int]], splits: int = 0, exits: int = 0, complete: bool = False)

active: frozenset[tuple[int, int]]

visited: frozenset[tuple[int, int]]

splits: int = 0

exits: int = 0

complete: bool = False

__init__(active: frozenset[tuple[int, int]], visited: frozenset[tuple[int, int]], splits: int = 0, exits: int = 0, complete: bool = False) → None

bruhanimate.demos.beam_demo.solve(board: Sequence[str] = ('.......S.......', '...............', '.......^.......', '...............', '......^.^......', '...............', '.....^.^.^.....', '...............', '...............')) → Iterator[BeamState]

Yield one immutable snapshot per row, retaining only current board state.

Cells are ‘.’, ‘^’, or a single top-row ‘S’. Splits take effect on the next row; out-of-bounds branches exit and coincident branches merge. This is a small visualization example, not an Advent of Code solution or input.

bruhanimate.demos.beam_demo.draw_state(state: BeamState, buffer: Buffer) → None

Draw only current state; puzzle-specific glyphs stay in the demo.

bruhanimate.demos.beam_demo.build_scene(buffer: Buffer, playback: Playback[BeamState]) → Scene

Compose a clipped snow panel, solver, timed message, and status display.

bruhanimate.demos.beam_demo.run(*, frames: int | None = None, fps: float = 60, on_resize: Literal['raise', 'resize'] = 'resize') → int

Play the demo natively; hold the completed board until quit/frame limit.