1 package tim.prune.function.compress;
3 import java.awt.Component;
4 import java.awt.event.ActionListener;
6 import tim.prune.data.DataPoint;
7 import tim.prune.data.Track;
10 * Algorithm for detecting wacky points to compress
12 public class WackyPointAlgorithm extends SingleParameterAlgorithm
16 * @param inTrack track object
17 * @param inDetails track details object
18 * @param inListener listener to attach to activation control
20 public WackyPointAlgorithm(Track inTrack, TrackDetails inDetails, ActionListener inListener)
22 super(inTrack, inDetails, inListener);
26 * Perform the compression and work out which points should be deleted
27 * @param inFlags deletion flags from previous algorithms
28 * @return number of points deleted
30 protected int compress(boolean[] inFlags)
32 double param = getParameter();
33 if (param <= 0.0) return 0;
34 int numPoints = _track.getNumPoints();
36 double threshold = param * _trackDetails.getMeanRadians();
37 DataPoint currPoint = null, prevPoint = null;
38 // Loop over all points looking for points far away from neighbours
39 for (int i=0; i<numPoints; i++)
41 currPoint = _track.getPoint(i);
42 // Don't delete points which are already marked as deleted
45 // Don't delete any waypoints or photo points, or start/end of segments
46 if (!currPoint.isWaypoint() && currPoint.getPhoto() == null
47 && !_trackDetails.isSegmentStart(i) && !_trackDetails.isSegmentEnd(i))
49 // Measure distance from previous track point
50 if (DataPoint.calculateRadiansBetween(prevPoint, currPoint) > threshold)
52 // Now need to find next track point, and measure distances
53 DataPoint nextPoint = _track.getNextTrackPoint(i+1);
54 if (nextPoint != null && DataPoint.calculateRadiansBetween(currPoint, nextPoint) > threshold
55 && DataPoint.calculateRadiansBetween(prevPoint, nextPoint) < threshold)
57 // Found a point to delete (hope that next point hasn't been deleted already)
63 // Remember last (not-deleted) track point
64 if (!currPoint.isWaypoint()) {prevPoint = currPoint;}
71 * @return specific gui components for dialog
73 protected Component getSpecificGuiComponents()
75 return getSpecificGuiComponents("dialog.compress.wackypoints.paramdesc", "2");
79 * @return title key for box
81 protected String getTitleTextKey()
83 return "dialog.compress.wackypoints.title";