removed Heading::rnd()

changed particle init
fixed uninitialized values
new ground-truth helper methods
added new stats to the eval (distance from ground-truth)

code/eval/GroundTruthWay.h

@@ -18,6 +18,29 @@ public:
 	/** get the ground truth way */
 	const std::vector<InterpolatorEntry>& getWay() const {return entries;}
 
+	/** get the time where the ground-truth is nearest to p */
+	uint64_t getNearestTime(const Point3 p) const {
+
+		// TODO only an approximation (100ms) -> minor errors possible
+
+		float minD = INFINITY;
+		uint64_t minTS = 0;
+		for (uint64_t ts = getMinKey(); ts <= getMaxKey(); ts += 100) {
+			const Point3 cur = getPosAtTime(ts);
+			const float curD = cur.getDistance(p);
+			if (curD < minD) {minD = curD; minTS = ts;}
+		}
+		return minTS;
+
+	}
+
+	/** get the minimum distance between the given point and the ground-truth (at any time) */
+	float getMinDist(const Point3 p1) const {
+		const uint64_t minTS = getNearestTime(p1);
+		const Point3 p2 = getPosAtTime(minTS);
+		return p1.getDistance(p2);
+	}
+
 };