X-Git-Url: http://gitweb.fperrin.net/?a=blobdiff_plain;f=tim%2Fprune%2Fdata%2FDataPoint.java;h=4cf7c827952a8c10c8c46adb5602e4fcbbf3d956;hb=52bf9e8686c916be37a26a0b75340393d4478b05;hp=46c4acd9d1ad562883ed9d8a8830802d1f123c19;hpb=5625a1abadb5f2ca5f017fe7dbda1d5141cb637b;p=GpsPrune.git

diff --git a/tim/prune/data/DataPoint.java b/tim/prune/data/DataPoint.java
index 46c4acd..4cf7c82 100644
--- a/tim/prune/data/DataPoint.java
+++ b/tim/prune/data/DataPoint.java
@@ -17,7 +17,7 @@ public class DataPoint
 	private Timestamp _timestamp = null;
 	private Photo _photo = null;
 	private String _waypointName = null;
-	// private boolean _startOfSegment = false;
+	private boolean _startOfSegment = false;
 
 
 	/**
@@ -48,7 +48,9 @@ public class DataPoint
 		_altitude = new Altitude(getFieldValue(Field.ALTITUDE), inAltFormat);
 		_timestamp = new Timestamp(getFieldValue(Field.TIMESTAMP));
 		_waypointName = getFieldValue(Field.WAYPT_NAME);
-		// TODO: Parse segment start field (format?)
+		String segmentStr = getFieldValue(Field.NEW_SEGMENT);
+		if (segmentStr != null) {segmentStr = segmentStr.trim();}
+		_startOfSegment = (segmentStr != null && (segmentStr.equals("1") || segmentStr.toUpperCase().equals("Y")));
 	}
 
 
@@ -68,8 +70,13 @@ public class DataPoint
 		_fieldValues[0] = inLatitude.output(Coordinate.FORMAT_DEG_MIN_SEC);
 		_longitude = inLongitude;
 		_fieldValues[1] = inLongitude.output(Coordinate.FORMAT_DEG_MIN_SEC);
-		_altitude = inAltitude;
-		if (inAltitude != null) {_fieldValues[2] = "" + inAltitude.getValue(Altitude.FORMAT_METRES);}
+		if (inAltitude == null) {
+			_altitude = Altitude.NONE;
+		}
+		else {
+			_altitude = inAltitude;
+			_fieldValues[2] = "" + inAltitude.getValue(Altitude.FORMAT_METRES); // units are ignored
+		}
 		_timestamp = new Timestamp(null);
 	}
 
@@ -137,36 +144,54 @@ public class DataPoint
 		}
 	}
 
+	/** @param inFlag true for start of track segment */
+	public void setSegmentStart(boolean inFlag)
+	{
+		setFieldValue(Field.NEW_SEGMENT, inFlag?"1":null);
+	}
 
+	/** @return latitude */
 	public Coordinate getLatitude()
 	{
 		return _latitude;
 	}
+	/** @return longitude */
 	public Coordinate getLongitude()
 	{
 		return _longitude;
 	}
+	/** @return true if point has altitude */
 	public boolean hasAltitude()
 	{
 		return _altitude.isValid();
 	}
+	/** @return altitude */
 	public Altitude getAltitude()
 	{
 		return _altitude;
 	}
+	/** @return true if point has timestamp */
 	public boolean hasTimestamp()
 	{
 		return _timestamp.isValid();
 	}
+	/** @return timestamp */
 	public Timestamp getTimestamp()
 	{
 		return _timestamp;
 	}
+	/** @return waypoint name, if any */
 	public String getWaypointName()
 	{
 		return _waypointName;
 	}
 
+	/** @return true if start of new track segment */
+	public boolean getSegmentStart()
+	{
+		return _startOfSegment;
+	}
+
 	/**
 	 * @return true if point has a waypoint name
 	 */
@@ -202,10 +227,7 @@ public class DataPoint
 		{
 			return !inOther.isWaypoint();
 		}
-		else
-		{
-			return (inOther._waypointName != null && inOther._waypointName.equals(_waypointName));
-		}
+		return (inOther._waypointName != null && inOther._waypointName.equals(_waypointName));
 	}
 
 
@@ -246,21 +268,33 @@ public class DataPoint
 	public DataPoint[] interpolate(DataPoint inEndPoint, int inNumPoints)
 	{
 		DataPoint[] range = new DataPoint[inNumPoints];
-		Coordinate endLatitude = inEndPoint.getLatitude();
-		Coordinate endLongitude = inEndPoint.getLongitude();
-		Altitude endAltitude = inEndPoint.getAltitude();
-
 		// Loop over points
 		for (int i=0; i<inNumPoints; i++)
 		{
-			Coordinate latitude = Coordinate.interpolate(_latitude, endLatitude, i, inNumPoints);
-			Coordinate longitude = Coordinate.interpolate(_longitude, endLongitude, i, inNumPoints);
-			Altitude altitude = Altitude.interpolate(_altitude, endAltitude, i, inNumPoints);
+			Coordinate latitude = Coordinate.interpolate(_latitude, inEndPoint.getLatitude(), i, inNumPoints);
+			Coordinate longitude = Coordinate.interpolate(_longitude, inEndPoint.getLongitude(), i, inNumPoints);
+			Altitude altitude = Altitude.interpolate(_altitude, inEndPoint.getAltitude(), i, inNumPoints);
 			range[i] = new DataPoint(latitude, longitude, altitude);
 		}
 		return range;
 	}
 
+	/**
+	 * Interpolate between the two given points
+	 * @param inStartPoint start point
+	 * @param inEndPoint end point
+	 * @param inFrac fractional distance from first point (0.0 to 1.0)
+	 * @return new DataPoint object between two given ones
+	 */
+	public static DataPoint interpolate(DataPoint inStartPoint, DataPoint inEndPoint, double inFrac)
+	{
+		if (inStartPoint == null || inEndPoint == null) {return null;}
+		return new DataPoint(
+			Coordinate.interpolate(inStartPoint.getLatitude(), inEndPoint.getLatitude(), inFrac),
+			Coordinate.interpolate(inStartPoint.getLongitude(), inEndPoint.getLongitude(), inFrac),
+			Altitude.interpolate(inStartPoint.getAltitude(), inEndPoint.getAltitude(), inFrac)
+		);
+	}
 
 	/**
 	 * Calculate the number of radians between two points (for distance calculation)
@@ -343,4 +377,14 @@ public class DataPoint
 		}
 		return false;
 	}
+
+
+	/**
+	 * Get string for debug
+	 * @see java.lang.Object#toString()
+	 */
+	public String toString()
+	{
+		return "[Lat=" + getLatitude().toString() + ", Lon=" + getLongitude().toString() + "]";
+	}
 }