code: function vec3lerp(out, a, b, t, oa, ob) {
      var ax = a[oa];
      var ay = a[oa + 1];
      var az = a[oa + 2];
      out[0] = ax + t * (b[ob] - ax);
      out[1] = ay + t * (b[ob + 1] - ay);
      out[2] = az + t * (b[ob + 2] - az);
  
      return out;
  }
docs: Sampler clip is especially for the animation sampler in glTF Use Typed Array can reduce a lot of heap memory lerp function with offset in large array