volseq_pathline_render — LIVE4D `flow` op

• Data kinds: volseq → rgb

• Call: import fullseye as fs; fs.ledger.volseq_pathline_render(volseq, n_seeds: 'int' = 200, yaw: 'float' = 35.0, pitch: 'float' = 25.0, size: 'int' = 256, static_alpha: 'float' = 0.03, win: 'int' = 3, pyr_levels: 'int' = 3, iters: 'int' = 5, reg: 'float' = 0.001, seed: 'int' = 0, trail_sigma: 'float' = 0.7, min_speed: 'float' = 0.1, min_intensity: 'float' = 0.3) -> 'np.ndarray' (to call the implementation directly, import live4d; live4d.volseq_pathline_render(volseq, n_seeds: 'int' = 200, yaw: 'float' = 35.0, pitch: 'float' = 25.0, size: 'int' = 256, static_alpha: 'float' = 0.03, win: 'int' = 3, pyr_levels: 'int' = 3, iters: 'int' = 5, reg: 'float' = 0.001, seed: 'int' = 0, trail_sigma: 'float' = 0.7, min_speed: 'float' = 0.1, min_intensity: 'float' = 0.3) -> 'np.ndarray'; from the registry, opslive4d.get("volseq_pathline_render"))

Usage

> This operator's description has not been translated yet. The original text follows as it is.

粒子を流れに乗せて描いた軌跡の立体 `(size, size, 3)(rgb`)—— 動きを 1 枚の静止画で見せる。

隣り合うフレームの変位場(`vol_flow_3d)で、動いていて(速さ >= min_speed`)かつ明るい(最初の

フレームの値域の `min_intensity 以上 = 構造のある)場所から撒いた n_seeds` 個の粒子を変位場の写像どおりに移流し、

軌跡を時刻の色(青 = 始め → 赤 = 終わり)で立方体に描いて `vol_render_transfer` で任意視点から

合成する。`static_alpha` > 0 なら最初のフレームの明るさを薄い灰で重ねる(どこを流れたかの手掛かり)。

`trail_sigma` は軌跡の太さ(voxel)。テクスチャの無い場所の流れは決まらない(開口問題)ので、

種を明るい場所に限る —— 速さだけで選ぶと真っ暗な隅にも種が落ちて立方体が軌跡で埋まる(実測)。

Detailed usage guide

• live4d family guide

References (sample data, literature)

• Sample-data catalog (download URLs / licences) — 2-D uses skimage.data (BSD/public domain) plus synthetic images; 3-D lists download URLs for real data sources (Stanford, PDS, …).

• Operator provenance and references — the sources of the research/methods this op family came from.

• The canonical algorithm (author, year) and its uses are named in the family usage guide above.

Runnable examples (verified samples that actually call this op)

• poc_live4d — py -3.11 examples/poc_live4d.py

Ops the type connects to (they accept `rgb` as input)

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Same category (`flow`)

vol_flow_3d · volseq_speed · volseq_pathline_orbit

*Provenance: live4d.py — LIVE4D operator registry. This per-op note is generated by tools/opdocs.py md (do not hand-edit).*

volseq_pathline_render — LIVE4D flow op