/// <summary>
/// Interpolates over the whole spline by the specified parametric value.
/// </summary>
/// <param name="self">The spline instance applied.</param>
/// <param name="t">
/// Parametric value ranges from 0 to 1 representing the position along the whole length of the spline.
/// </param>
public static Vector3 Interpolate(this ISpline self, float t)
{
float pos = t * (self.PointCount - 1);
var index = (int)pos;
return(self.Interpolate(index, pos - index));
}