How to use the @antv/matrix-util.vec2.add function in @antv/matrix-util

v = vec2.sub(v, nextPoint, prevPoint);
    v = vec2.scale(v, v, smooth);

    let d0 = vec2.distance(point, prevPoint);
    let d1 = vec2.distance(point, nextPoint);

    const sum = d0 + d1;
    if (sum !== 0) {
      d0 /= sum;
      d1 /= sum;
    }

    const v1 = vec2.scale([], v, -d0);
    const v2 = vec2.scale([], v, d1);

    let cp0 = vec2.add([], point, v1);
    let cp1 = vec2.add([], point, v2);

    if (hasConstraint) {
      cp0 = vec2.max([], cp0, min);
      cp0 = vec2.min([], cp0, max);
      cp1 = vec2.max([], cp1, min);
      cp1 = vec2.min([], cp1, max);
    }

    cps.push(cp0);
    cps.push(cp1);
  }

  if (isLoop) {
    cps.push(cps.shift());
  }

v = vec2.scale(v, v, smooth);

    let d0 = vec2.distance(point, prevPoint);
    let d1 = vec2.distance(point, nextPoint);

    const sum = d0 + d1;
    if (sum !== 0) {
      d0 /= sum;
      d1 /= sum;
    }

    const v1 = vec2.scale([], v, -d0);
    const v2 = vec2.scale([], v, d1);

    let cp0 = vec2.add([], point, v1);
    let cp1 = vec2.add([], point, v2);

    if (hasConstraint) {
      cp0 = vec2.max([], cp0, min);
      cp0 = vec2.min([], cp0, max);
      cp1 = vec2.max([], cp1, min);
      cp1 = vec2.min([], cp1, max);
    }

    cps.push(cp0);
    cps.push(cp1);
  }

  if (isLoop) {
    cps.push(cps.shift());
  }
  return cps;

v = vector2.sub(v, nextPoint, prevPoint);
    v = vector2.scale(v, v, smooth);

    let d0 = vector2.distance(point, prevPoint);
    let d1 = vector2.distance(point, nextPoint);

    const sum = d0 + d1;
    if (sum !== 0) {
      d0 /= sum;
      d1 /= sum;
    }

    const v1 = vector2.scale([], v, -d0);
    const v2 = vector2.scale([], v, d1);

    let cp0 = vector2.add([], point, v1);
    let cp1 = vector2.add([], point, v2);

    if (hasConstraint) {
      cp0 = vector2.max([], cp0, min);
      cp0 = vector2.min([], cp0, max);
      cp1 = vector2.max([], cp1, min);
      cp1 = vector2.min([], cp1, max);
    }

    cps.push(cp0);
    cps.push(cp1);
  }

  if (isLoop) {
    cps.push(cps.shift());
  }

v = vector2.scale(v, v, smooth);

    let d0 = vector2.distance(point, prevPoint);
    let d1 = vector2.distance(point, nextPoint);

    const sum = d0 + d1;
    if (sum !== 0) {
      d0 /= sum;
      d1 /= sum;
    }

    const v1 = vector2.scale([], v, -d0);
    const v2 = vector2.scale([], v, d1);

    let cp0 = vector2.add([], point, v1);
    let cp1 = vector2.add([], point, v2);

    if (hasConstraint) {
      cp0 = vector2.max([], cp0, min);
      cp0 = vector2.min([], cp0, max);
      cp1 = vector2.max([], cp1, min);
      cp1 = vector2.min([], cp1, max);
    }

    cps.push(cp0);
    cps.push(cp1);
  }

  if (isLoop) {
    cps.push(cps.shift());
  }
  return cps;