added von mises distributionb

quick&dirty: added activity to the grid-walkers

math/Math.h

@@ -0,0 +1,20 @@
+#ifndef K_MATH_MATH_H
+#define K_MATH_MATH_H
+
+#include "../Defines.h"
+
+class Math {
+
+public:
+
+	/** ensure val stays within [min:max] */
+	template <typename Scalar> static inline Scalar clamp(const Scalar min, const Scalar max, const Scalar val) {
+		if (unlikely(val < min)) {return min;}
+		if (unlikely(val > max)) {return max;}
+		return val;
+	}
+
+};
+
+
+#endif // K_MATH_MATH_H