Introduce Steffen monotone cubic splines.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/powermap.h b/src/powermap.h
index 29a3c81..b942722 100644
--- a/src/powermap.h
+++ b/src/powermap.h
@@ -64,9 +64,13 @@ private:
 
 	// spline parameters (deterministically computed from the input parameters)
 	std::array<float, 5> m;
-
 	bool spline_needs_update;
+
 	void updateSpline();
+	std::vector<float> calcSlopes(Powers const& X, Powers const& P);
+	std::vector<float> calcSlopesFritschCarlson(Powers const& X, Powers const& P);
+	std::vector<float> calcSlopesSteffen(Powers const& X, Powers const& P);
+
 	Power clamp(Power in, Power min, Power max) const;
 
 	const Power eps = 1e-3;