Animations (.animations)

random_walk

infinigen2.animations.random_walk.random_walk(...) → Object | None

Animate any pre-posed obj along a random walk within bbox.

Initial posing is the caller’s responsibility; this only drives the walk. Returns obj if a complete path was found, else None.

Parameters:

• rng (Generator)

• obj (Object)

• bbox (tuple[ndarray, ndarray])

• frame_start (int)

• frame_end (int)

• accept_fn (Callable[[], bool] | None) -- (default: None)

• max_retries (int) -- (default: 20)

• failure_mode (str) -- (default: 'error')

infinigen2.animations.random_walk.random_walk_step_fn(

...,

) → Callable[[Generator, ndarray, ndarray], tuple[ndarray, ndarray, float]]

Parameters:

• bbox (tuple[ndarray, ndarray])

• margin (float) -- (default: 0.05)

• speed_mps_range (tuple[float, float]) -- (default: (2.0, 3.0))

• loc_step_range (tuple[float, float]) -- (default: (1.0, 4.0))

• rot_std_deg (tuple[float, float, float]) -- (default: (15.0, 15.0, 30.0))

• roll_range_deg (tuple[float, float]) -- (default: (-25.0, 25.0))

• pitch_range_deg (tuple[float, float]) -- (default: (45.0, 135.0))

• height_range (tuple[float, float] | None) -- (default: None)

infinigen2.animations.random_walk.walk_loop(...) → Object | None

Animate obj along a random walk from frame_start to frame_end.

The object must already be positioned at a valid initial pose. A None accept_fn accepts every proposed trajectory. On exhaustion failure_mode selects “error” (raise), “warn” (log and return None) or “return” (return None silently). Returns obj if a complete path was found, else None.

Parameters:

• rng (Generator)

• obj (Object)

• sampler (Callable[[Generator, ndarray, ndarray], tuple[ndarray, ndarray, float]])

• frame_start (int)

• frame_end (int)

• accept_fn (Callable[[], bool] | None) -- (default: None)

• max_retries (int) -- (default: 20)

• failure_mode (str) -- (default: 'error')

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