/// <summary>Creates a uniform B-spline of the given degree, automatically configuring the knot vector to be uniform</summary>
/// <param name="points">The B-spline control points</param>
/// <param name="degree">The degree of the curve</param>
/// <param name="open">Whether or not it should be open. Open means the curve passes through its endpoints</param>
public BSpline2D(Vector2[] points, int degree = 3, bool open = false)
{
this.points = points;
this.degree = degree.AtLeast(1);
this.evalBuffer = new Vector2[degree + 1];
this.knots = SplineUtils.GenerateUniformKnots(this.degree, this.points.Length, open);
}
public static Nurbs2D GetUniformBSpline(Vector2[] points, int degree = 3, bool open = true)
{
int ptCount = points.Length;
float[] knots = SplineUtils.GenerateUniformKnots(degree, ptCount, open);
return(new Nurbs2D(points, knots, null, degree));
}
/// <summary>Creates a B-spline of the given degree, from a set of points and a knot vector</summary>
/// <param name="points">The B-spline control points</param>
/// <param name="knots">The knot vector defining the parameter space of this B-spline. Note: the number of knots has to be exactly degree+pointCount+1</param>
/// <param name="degree">The degree of the spline</param>
public BSpline2D(Vector2[] points, float[] knots, int degree = 3)
{
this.points = points;
this.knots = knots;
this.degree = degree;
this.evalBuffer = new Vector2[degree + 1];
if (knots.Length != SplineUtils.BSplineKnotCount(this.points.Length, this.degree))
{
throw new ArgumentException($"The knots array has to be of length (degree+pointCount+1). Got an array of {knots.Length} knots, expected ${KnotCount}", nameof(knots));
}
}
