Method getFrame

script.js:395–410

(ref_time)

  }

  getFrame(ref_time) {
    let index = this.getIndex(ref_time);
    if (index < 0 || index >= this.frames.length) {
      return null;
    }
    let frame = new Float32Array(this.frames[index]);
    // we floored the index, but might need to interpolate subframes
    if (index + 1 < this.frames.length) {
      const diff = ref_time - this.getTime(index);
      const diff_next = this.getTime(index + 1) - ref_time;
      let next_frame = this.frames[index + 1];
      let s = diff_next / (diff + diff_next);
      frame = this.interpolate_frame(frame, next_frame, s);
    }
    return frame;
  }

  update(change, ref_time) {
    let f = this.getFrame(ref_time);