docs: function getBezierCoordinate(t, c1, c2) {
    // Special case start and end.
    if (t === 0 || t === 1) {
      return t;
    }
  
    // Step one - from 4 points to 3
    let ic0 = t * c1;
    let ic1 = c1 + t * (c2 - c1);
    const ic2 = c2 + t * (1 - c2);
  
    // Step two - from 3 points to 2
    ic0 += t * (ic1 - ic0);
    ic1 += t * (ic2 - ic1);
  
    // Final step - last point
    return ic0 + t * (ic1 - ic0);
  }