X-Git-Url: http://git.tdb.fi/?p=libs%2Fmath.git;a=blobdiff_plain;f=source%2Finterpolate%2Fspline.h;fp=source%2Finterpolate%2Fspline.h;h=c801188e695cfb4f1c6a51c75368332ad5af53e9;hp=67c8df07d9b9e24904b868ab1950762d7d95c58c;hb=23583f28679d722e7354c1aa9951731e3dc79726;hpb=4b895388d12b160f486c8b49b3296b15eeed7cc2

diff --git a/source/interpolate/spline.h b/source/interpolate/spline.h
index 67c8df0..c801188 100644
--- a/source/interpolate/spline.h
+++ b/source/interpolate/spline.h
@@ -3,6 +3,7 @@
 
 #include <algorithm>
 #include <vector>
+#include "knot.h"
 #include "polynomial.h"
 
 namespace Msp {
@@ -24,6 +25,17 @@ struct SplineValue<T, 1>
 	static Type make(const T *v) { return *v; }
 };
 
+template<typename T, unsigned N>
+struct SplineKnot
+{
+	typedef typename SplineValue<T, N>::Type Value;
+	T x;
+	Value y;
+
+	SplineKnot(): x(T()) { }
+	SplineKnot(T x_, const Value &y_): x(x_), y(y_) { }
+};
+
 /**
 Stores a spline of degree D.  It is a piecewise polynomial function with value
 continuity.  Derivatives are not guaranteed to be continuous.
@@ -39,15 +51,7 @@ class Spline
 {
 public:
 	typedef typename SplineValue<T, N>::Type Value;
-
-	struct Knot
-	{
-		T x;
-		Value y;
-
-		Knot(): x(T()) { }
-		Knot(T x_, const Value &y_): x(x_), y(y_) { }
-	};
+	typedef SplineKnot<T, N> Knot;
 
 	struct Segment
 	{