/// <summary>
/// Travels some distance on beizer and calculates the point and tangent at that distance.
/// </summary>
/// <param name="distance">distance to travel on the arc in meteres</param>
/// <param name="tangent">normalized tangent on the curve toward the end of the beizer.</param>
/// <returns>point on the curve at the given distance.</returns>
public static Vector2 Travel2(this Bezier2 beizer, float distance, out Vector2 tangent)
{
if (beizer.IsStraight())
{
tangent = (beizer.d - beizer.a).normalized;
return(beizer.TravelStraight(distance));
}
float t = beizer.Travel(0, distance);
tangent = beizer.Tangent(t).normalized;
return(beizer.Position(t));
}