/// <summary>
/// Interpolates a sequence of points. Used by InterpCurve Command
/// This routine works best when degree=3.
/// </summary>
/// <param name="degree">The degree of the curve >=1. Degree must be odd.</param>
/// <param name="points">
/// Points to interpolate. For periodic curves if the final point is a
/// duplicate of the initial point it is ignored. (Count must be >=2)
/// </param>
/// <param name="knots">
/// Knot-style to use and specifies if the curve should be periodic.
/// </param>
/// <param name="startTangent">A starting tangent.</param>
/// <param name="endTangent">An ending tangent.</param>
/// <returns>interpolated curve on success. null on failure.</returns>
public static Curve CreateInterpolatedCurve(IEnumerable<Point3d> points, int degree, CurveKnotStyle knots, Vector3d startTangent, Vector3d endTangent)
{
if (null == points)
throw new ArgumentNullException("points");
int count;
Point3d[] ptArray = Point3dList.GetConstPointArray(points, out count);
if (count < 2)
throw new InvalidOperationException("Insufficient points for an interpolated curve");
if (2 == count && !startTangent.IsValid && !endTangent.IsValid)
return new LineCurve(ptArray[0], ptArray[1]);
if (1 == degree && count > 2 && !startTangent.IsValid && !endTangent.IsValid)
return PolylineCurve.FromArray(ptArray);
IntPtr ptr = UnsafeNativeMethods.RHC_RhinoInterpCurve(degree, count, ptArray, startTangent, endTangent, (int)knots);
return GeometryBase.CreateGeometryHelper(ptr, null) as NurbsCurve;
}
/// <summary>
/// Interpolates a sequence of points. Used by InterpCurve Command
/// This routine works best when degree=3.
/// </summary>
/// <param name="degree">The degree of the curve >=1. Degree must be odd.</param>
/// <param name="points">
/// Points to interpolate. For periodic curves if the final point is a
/// duplicate of the initial point it is ignored. (Count must be >=2)
/// </param>
/// <param name="knots">
/// Knot-style to use and specifies if the curve should be periodic.
/// </param>
/// <returns>interpolated curve on success. null on failure.</returns>
public static Curve CreateInterpolatedCurve(IEnumerable<Point3d> points, int degree, CurveKnotStyle knots)
{
return CreateInterpolatedCurve(points, degree, knots, Vector3d.Unset, Vector3d.Unset);
}
