1 files changed, 33 insertions, 0 deletions
diff --git a/common/accel-experimentone.hpp b/common/accel-experimentone.hpp
new file mode 100644
index 0000000..7d21b58
--- /dev/null
+++ b/common/accel-experimentone.hpp
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <math.h>
+
+#include "accel-base.hpp"
+
+namespace rawaccel {
+
+	/// <summary> Struct to hold sigmoid (s-shaped) gain implementation. </summary>
+	struct experimentone_impl {
+		double rate;
+		double limit;
+		double midpoint;
+		double subtractive_constant;
+
+		experimentone_impl(const accel_args& args) :
+			rate(pow(10,args.rate)), limit(2*log10(args.limit)), midpoint(log10(args.midpoint))
+		{
+			subtractive_constant = limit / 2;
+		}
+
+		inline double operator()(double speed) const {
+			double log_speed = log10(speed);
+			return pow(10, limit / (exp(-rate * (log_speed - midpoint)) + 1) - subtractive_constant);
+
+		}
+
+		inline double legacy_offset(double speed) const { return operator()(speed); }
+	};
+
+	using accel_experimentone = nonadditive_accel<experimentone_impl>;
+
+}