--- a/c/Feature.cpp	Wed Aug 17 19:03:25 2011 -0400
+++ b/c/Feature.cpp	Wed Aug 17 22:26:01 2011 -0400
@@ -3,6 +3,8 @@
 #include "opencv2/core/core.hpp"
 #include "opencv2/highgui/highgui.hpp"
 
+#include "src/TrajectoryDBAccessList.h"
+
 using namespace std;
 using namespace cv;
 
@@ -15,6 +17,11 @@
   computeMotionData(frameNum);
 }
 
+void FeatureTrajectory::write(TrajectoryDBAccess<Point2f>& trajectoryDB) const {
+  /// \todo save velocities
+  trajectoryDB.write(positions);
+}
+
 #ifdef USE_OPENCV
 /// \todo add option for anti-aliased drawing, thickness
 void FeatureTrajectory::draw(Mat& img, const Scalar& color) const {