Datasets:
File size: 5,274 Bytes
5b4bd51 c21a21b 5b4bd51 c21a21b 5b4bd51 | 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 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | #!/usr/bin/env python3
"""Build the dataset indexes: walk every .glb once and write both CSVs.
Reads only each file's glTF JSON chunk, so the whole collection is probed in
seconds regardless of total size.
python3 build_dataset.py [--src DIR] [--link]
--link additionally hardlinks the source assets into ../glb/.
"""
import argparse, csv, json, os, re, shutil, sys, time
HERE = os.path.dirname(os.path.abspath(__file__)); sys.path.insert(0, HERE)
from glb_probe import read_gltf_json, probe
ROOT = os.path.dirname(HERE)
XL = re.compile(r"^([0-9a-f]{24})_(fbx|glb|gltf)\.glb$")
SKFB = re.compile(r"^([0-9a-f]{32})\.glb$")
ASSET_COLS = ["file", "object_id", "id_family", "source_format", "size_bytes",
"num_vertices", "num_meshes", "num_nodes", "num_joints",
"num_skeleton_roots", "single_tree", "num_animations",
"total_duration_sec", "max_keyframes", "animated_joints", "generator"]
CLIP_COLS = ["file", "object_id", "clip_index", "clip_name", "duration_sec",
"keyframes", "num_channels", "animated_nodes", "animated_joints",
"drives_skeleton"]
def identify(fname):
m = XL.match(fname)
if m:
return m.group(1), m.group(2), "objaverse_xl"
s = SKFB.match(fname)
if s:
return s.group(1), "", "objaverse_sketchfab"
return os.path.splitext(fname)[0], "", "unknown"
def clips_of(gltf, joints):
accs = gltf.get("accessors", []) or []
for i, a in enumerate(gltf.get("animations", []) or []):
dur = kf = 0
for smp in (a.get("samplers") or []):
k = smp.get("input")
if k is None or k >= len(accs):
continue
acc = accs[k]
kf = max(kf, acc.get("count", 0) or 0)
mx = acc.get("max")
if isinstance(mx, list) and mx:
try: dur = max(dur, float(mx[0]))
except (TypeError, ValueError): pass
tgt = {(c.get("target") or {}).get("node") for c in (a.get("channels") or [])}
tgt.discard(None)
yield {"clip_index": i, "clip_name": (a.get("name") or "")[:120],
"duration_sec": round(dur, 4), "keyframes": kf,
"num_channels": len(a.get("channels") or []),
"animated_nodes": len(tgt), "animated_joints": len(tgt & joints)}
def main():
ap = argparse.ArgumentParser()
ap.add_argument("--src", default=os.path.join(ROOT, "glb"))
ap.add_argument("--link", action="store_true", help="hardlink --src assets into ../glb/")
args = ap.parse_args()
if args.link and os.path.abspath(args.src) != os.path.abspath(os.path.join(ROOT, "glb")):
dst = os.path.join(ROOT, "glb"); os.makedirs(dst, exist_ok=True)
for f in sorted(os.listdir(args.src)):
if f.endswith(".glb") and not os.path.exists(os.path.join(dst, f)):
try: os.link(os.path.join(args.src, f), os.path.join(dst, f))
except OSError: shutil.copy2(os.path.join(args.src, f), os.path.join(dst, f))
args.src = dst
files = sorted(f for f in os.listdir(args.src) if f.endswith(".glb"))
t0 = time.time(); assets = []; clips = []; failed = []
for n, f in enumerate(files, 1):
path = os.path.join(args.src, f)
oid, fmt, fam = identify(f)
try:
info = probe(path)
_, gltf = read_gltf_json(path)
except Exception as e:
failed.append((f, str(e)[:80])); continue
joints = set()
for s in (gltf.get("skins", []) or []):
joints.update(s.get("joints") or [])
cs = list(clips_of(gltf, joints))
for c in cs:
c.update(file="glb/" + f, object_id=oid,
drives_skeleton=str(c["animated_joints"] > 0).lower())
clips.append(c)
assets.append({
"file": "glb/" + f, "object_id": oid, "id_family": fam, "source_format": fmt,
"size_bytes": os.path.getsize(path),
"num_vertices": info["num_vertices"], "num_meshes": info["num_meshes"],
"num_nodes": info["num_nodes"],
"num_joints": info["num_joints"], "num_skeleton_roots": info["num_skeleton_roots"],
"single_tree": str(info["num_skeleton_roots"] == 1).lower(),
"num_animations": info["num_animations"],
"total_duration_sec": round(sum(c["duration_sec"] for c in cs), 4),
"max_keyframes": info["max_keyframes"], "animated_joints": info["animated_joints"],
"generator": info["generator"],
})
if n % 2000 == 0:
print(" %d/%d %.0fs" % (n, len(files), time.time() - t0), flush=True)
for name, cols, rows in (("metadata.csv", ASSET_COLS, assets),
("animations.csv", CLIP_COLS, clips)):
with open(os.path.join(ROOT, name), "w", newline="", encoding="utf-8") as fh:
w = csv.DictWriter(fh, fieldnames=cols); w.writeheader()
w.writerows({k: r.get(k, "") for k in cols} for r in rows)
print("%-15s -> %d rows" % (name, len(rows)))
if failed:
print("failed: %d" % len(failed))
for f, e in failed[:5]: print(" ", f, e)
print("%.0fs" % (time.time() - t0))
if __name__ == "__main__":
main()
|