content: package tim.prune.function.compress.methods;
  
  import tim.prune.data.DataPoint;
  import tim.prune.data.MarkingData;
  import tim.prune.data.NumberUtils;
  import tim.prune.data.Track;
  import tim.prune.function.compress.CompressionMethodType;
  import tim.prune.function.compress.TrackDetails;
  
  public class WackyPointsMethod extends CompressionMethod
  {
  	private final double _factor;
  
  	public WackyPointsMethod(double factor) {
  		_factor = factor;
  	}
  
  	public WackyPointsMethod(String inString) {
  		_factor = NumberUtils.getDoubleOrZero(recogniseString(inString) ? inString.substring(4) : inString);
  	}
  
  	public CompressionMethodType getType() {
  		return CompressionMethodType.WACKY_POINTS;
  	}
  
  	public String getParam() {
  		return "" + Math.abs(_factor);
  	}
  
  	public int compress(Track inTrack, TrackDetails inDetails, MarkingData inMarkings)
  	{
  		if (_factor <= 0.0) {
  			return 0;
  		}
  		int numPoints = inTrack.getNumPoints();
  		int numDeleted = 0;
  		double threshold = _factor * inDetails.getMeanRadians();
  		DataPoint currPoint = null, prevPoint = null;
  		// Loop over all points looking for points far away from neighbours
  		for (int i=0; i<numPoints; i++)
  		{
  			if (inMarkings.isPointMarkedForDeletion(i)) {
  				continue;
  			}
  			currPoint = inTrack.getPoint(i);
  			// Don't delete any waypoints or photo points, or start/end of segments
  			if (!currPoint.isWaypoint() && !currPoint.hasMedia()
  				&& !inDetails.isSegmentStart(i) && !inDetails.isSegmentEnd(i))
  			{
  				// Measure distance from previous track point
  				if (DataPoint.calculateRadiansBetween(prevPoint, currPoint) > threshold)
  				{
  					// Now need to find next track point, and measure distances
  					DataPoint nextPoint = getNextTrackPoint(inTrack, i+1, inMarkings);
  					if (nextPoint != null && DataPoint.calculateRadiansBetween(currPoint, nextPoint) > threshold
  						&& DataPoint.calculateRadiansBetween(prevPoint, nextPoint) < threshold)
  					{
  						// Found a point to delete
  						inMarkings.markPointForDeletion(i);
  						numDeleted++;
  					}
  				}
  			}
  			// Remember last (not-deleted) track point
  			if (!currPoint.isWaypoint() && !inMarkings.isPointMarkedForDeletion(i)) {
  				prevPoint = currPoint;
  			}
  		}
  		return numDeleted;
  	}
  
  	public String getSettingsString() {
  		return getType().getKey() + _factor;
  	}
  
  	static boolean recogniseString(String inString) {
  		return recogniseString(inString, CompressionMethodType.WACKY_POINTS);
  	}
  }
  