geometry changes/fixes/new features

new grid walkers + fixes
new test-cases
worked on step/and turn detection
android offline-data-reader
worked on vap-grouping

math/DrawList.h

@@ -60,6 +60,7 @@ public:
 
 	/** add a new user-element and its probability */
 	void add(T element, const double probability) {
+		Assert::isTrue(probability >= 0, "probability must not be negative!");
 		cumProbability += probability;
 		elements.push_back(Entry(element, cumProbability));
 	}

math/MovingAverageTS.h

@@ -0,0 +1,67 @@
+#ifndef MOVINGAVERAGETS_H
+#define MOVINGAVERAGETS_H
+
+#include <vector>
+#include "../data/Timestamp.h"
+#include <algorithm>
+
+template <typename T> class MovingAverageTS {
+
+private:
+
+	/** timestamp -> value combination */
+	struct Entry {
+		Timestamp ts;
+		T value;
+		Entry(const Timestamp ts, const T& value) : ts(ts), value(value) {;}
+	};
+
+	/** the regional window to use */
+	Timestamp window;
+
+	/** the value history for the window-size */
+	std::vector<Entry> history;
+
+	/** current sum */
+	T sum;
+
+public:
+
+
+	/** ctor with the window-size to use */
+	MovingAverageTS(const Timestamp window, const T zeroElement) : window(window), sum(zeroElement) {
+
+	}
+
+	/** add a new entry */
+	void add(const Timestamp ts, const T& data) {
+
+		// append to history
+		history.push_back(Entry(ts, data));
+
+		// adjust sum
+		sum += data;
+
+		// remove too-old history entries
+		const Timestamp oldest = ts - window;
+		while(history.front().ts < oldest) {
+
+			// adjust sum
+			sum -= history.front().value;
+
+			// remove from history
+			history.erase(history.begin());
+
+		}
+
+	}
+
+	/** get the current average */
+	T get() const {
+		return sum / history.size();
+	}
+
+
+};
+
+#endif // MOVINGAVERAGETS_H