Function sampleSampler

scripts/test-animation-times.mjs:77–116

(sampler, time, path)

}

function sampleSampler(sampler, time, path) {
    const input = sampler.input;
    const output = sampler.output;
    if (!input || !output || input.length === 0) return null;

    const minTime = input[0];
    const maxTime = input[input.length - 1];
    time = Math.max(minTime, Math.min(maxTime, time));

    let i0 = 0;
    for (let i = 0; i < input.length - 1; i++) {
        if (time >= input[i] && time <= input[i + 1]) {
            i0 = i;
            break;
        }
        if (time < input[i]) break;
        i0 = i;
    }
    const i1 = Math.min(i0 + 1, input.length - 1);

    const t0 = input[i0];
    const t1 = input[i1];
    const t = t1 > t0 ? (time - t0) / (t1 - t0) : 0;

    const componentCount = path === 'rotation' ? 4 : 3;

    if (path === 'rotation') {
        const q0 = [output[i0 * 4], output[i0 * 4 + 1], output[i0 * 4 + 2], output[i0 * 4 + 3]];
        const q1 = [output[i1 * 4], output[i1 * 4 + 1], output[i1 * 4 + 2], output[i1 * 4 + 3]];
        return slerpQuaternion(q0, q1, t);
    }

    const result = [];
    for (let c = 0; c < componentCount; c++) {
        const v0 = output[i0 * componentCount + c];
        const v1 = output[i1 * componentCount + c];
        result.push(v0 + (v1 - v0) * t);
    }
    return result;
}

function sampleAnimation(clip, time, nodes) {
    const nodeTransforms = new Map();