```
public void AddCurve()
{
Vector3 point = points[points.Length - 1];
Array.Resize(ref points, points.Length + 3);
point.x += 1f;
points[points.Length - 3] = point;
point.x += 1f;
points[points.Length - 2] = point;
point.x += 1f;
points[points.Length - 1] = point;
Array.Resize(ref modes, modes.Length + 1);
modes[modes.Length - 1] = modes[modes.Length - 2];
EnforceMode(points.Length - 4);
if (loop)
{
points[points.Length - 1] = points[0];
modes[modes.Length - 1] = modes[0];
EnforceMode(0);
}
}
```