在 Python 中加载和评估 GLB/GLTF 动画

pip install aspose-3d==26.10.0

import csv
import aspose.threed as a3d

INPUT_FILE = "animated_model.glb"
OUTPUT_FILE = "animation_transforms.csv"
FRAME_COUNT = 5

def get_nodes(root):
    """Recursively collect all nodes in the scene."""
    nodes = [root]

for child in root.child_nodes:
        nodes.extend(get_nodes(child))

return nodes

# Load the animated model
scene = a3d.Scene.from_file(INPUT_FILE)

# Retrieve animation clips
clips = list(scene.animation_clips)

if not clips:
    raise RuntimeError("No animation clips found.")

print(f"Found {len(clips)} animation clip(s).")

for i, item in enumerate(clips):
    print(
        f"{i}: {item.name} "
        f"({item.start:.3f} to {item.stop:.3f} seconds)"
    )

# Select the first clip and collect scene nodes
clip = clips[0]
nodes = get_nodes(scene.root_node)

print(f"\nEvaluating: {clip.name}")
print(f"Scene nodes: {len(nodes)}")

records = []

for i in range(FRAME_COUNT):
    time = float(
        clip.start +
        (clip.stop - clip.start) * i / (FRAME_COUNT - 1)
    )

# Apply animation at the requested time
    clip.apply_to(time)

print(f"\nTimestamp: {time:.3f}s")

for index, node in enumerate(nodes):
        transform = node.transform

translation = str(transform.translation)
        rotation = str(transform.rotation)
        scaling = str(transform.scaling)

records.append([
            time,
            index,
            node.name or "(unnamed)",
            translation,
            rotation,
            scaling
        ])

print(
            f"  {node.name or '(unnamed)'}: "
            f"position={translation}, "
            f"rotation={rotation}"
        )

# Write evaluated transformations to CSV
with open(
    OUTPUT_FILE, "w", newline="", encoding="utf-8"
) as file:
    writer = csv.writer(file)

writer.writerow([
        "Time",
        "Node Index",
        "Node Name",
        "Translation",
        "Rotation",
        "Scaling"
    ])

writer.writerows(records)

print(f"\nSaved animation data to {OUTPUT_FILE}")

scene = a3d.Scene.from_file("animated_model.glb")
clips = list(scene.animation_clips)