X-Git-Url: https://gitweb.fperrin.net/?p=GpsPrune.git;a=blobdiff_plain;f=src%2Ftim%2Fprune%2Fgui%2Fcolour%2FAltitudeColourer.java;fp=src%2Ftim%2Fprune%2Fgui%2Fcolour%2FAltitudeColourer.java;h=5ab79db89377b746861131fe95e91e456bec6389;hp=0000000000000000000000000000000000000000;hb=ce6f2161b8596f7018d6a76bff79bc9e571f35fd;hpb=2d8cb72e84d5cc1089ce77baf1e34ea3ea2f8465

diff --git a/src/tim/prune/gui/colour/AltitudeColourer.java b/src/tim/prune/gui/colour/AltitudeColourer.java
new file mode 100644
index 0000000..5ab79db
--- /dev/null
+++ b/src/tim/prune/gui/colour/AltitudeColourer.java
@@ -0,0 +1,70 @@
+package tim.prune.gui.colour;
+
+import java.awt.Color;
+
+import tim.prune.data.DataPoint;
+import tim.prune.data.Track;
+import tim.prune.data.TrackInfo;
+
+/**
+ * Colourer based on altitude values
+ */
+public class AltitudeColourer extends ContinuousPointColourer
+{
+	/**
+	 * Constructor
+	 * @param inStartColour start colour
+	 * @param inEndColour end colour
+	 */
+	public AltitudeColourer(Color inStartColour, Color inEndColour)
+	{
+		super(inStartColour, inEndColour);
+	}
+
+	@Override
+	public void calculateColours(TrackInfo inTrackInfo)
+	{
+		Track track = inTrackInfo == null ? null : inTrackInfo.getTrack();
+		final int numPoints = track == null ? 0 : track.getNumPoints();
+		DataPoint point = null;
+
+		// Figure out altitude range
+		double minAltitude = 0.0;
+		double maxAltitude = 0.0;
+		boolean altFound = false;
+		for (int i=0; i<numPoints; i++)
+		{
+			point = track.getPoint(i);
+			if (point != null && point.hasAltitude())
+			{
+				double altValue = point.getAltitude().getMetricValue();
+				if (altValue < minAltitude || !altFound) {minAltitude = altValue;}
+				if (altValue > maxAltitude || !altFound) {maxAltitude = altValue;}
+				altFound = true;
+			}
+		}
+
+		if ((maxAltitude - minAltitude) < 1.0)
+		{
+			// not enough altitude range, set all to null
+			init(0);
+		}
+		else
+		{
+			// initialise the array to the right size
+			init(numPoints);
+			// loop over track points to calculate colours
+			for (int i=0; i<numPoints; i++)
+			{
+				point = track.getPoint(i);
+				if (point != null && point.hasAltitude() && !point.isWaypoint())
+				{
+					double altValue = point.getAltitude().getMetricValue();
+					double fraction = (altValue - minAltitude) / (maxAltitude - minAltitude);
+					setColour(i, mixColour((float) fraction));
+				}
+				else setColour(i, null);
+			}
+		}
+	}
+}