Function main

scripts/test-animation-times.mjs:206–307

()

}

async function main() {
    const { FBXLoader } = await import('../packages/asset-system/dist/index.js');

    const binaryData = readFileSync(filePath);
    const loader = new FBXLoader();

    const context = {
        metadata: {
            path: filePath,
            name: filePath.split(/[\\/]/).pop(),
            type: 'model/fbx',
            guid: '',
            size: binaryData.length,
            hash: '',
            dependencies: [],
            lastModified: Date.now(),
            importerVersion: '1.0.0',
            labels: [],
            tags: [],
            version: 1
        },
        loadDependency: async () => null
    };

    const content = {
        type: 'binary',
        binary: binaryData.buffer
    };

    const asset = await loader.parse(content, context);

    if (!asset.skeleton || !asset.animations?.length) {
        console.log('No skeleton or animation data!');
        return;
    }

    const clip = asset.animations[0];
    const nodes = asset.nodes;
    const skeleton = asset.skeleton;

    console.log(`Animation: "${clip.name}", duration: ${clip.duration}s`);
    console.log(`Joints: ${skeleton.joints.length}`);

    // Test at different times
    const times = [0, clip.duration * 0.25, clip.duration * 0.5, clip.duration * 0.75, clip.duration];

    let prevMatrices = null;
    for (const time of times) {
        const animTransforms = sampleAnimation(clip, time, nodes);
        const skinMatrices = calculateBoneMatrices(skeleton, nodes, animTransforms);

        if (prevMatrices) {
            // Count how many bones changed
            let changedCount = 0;
            let maxChange = 0;
            for (let i = 0; i < skinMatrices.length; i++) {
                const diff = matrixDifference(skinMatrices[i], prevMatrices[i]);
                if (diff > 0.001) {