/** Get the data and populate the instance arrays */
public void init() {
initArrays();
_metric = Config.getConfigBoolean(Config.KEY_METRIC_UNITS);
_hasData = false;
_minValue = _maxValue = 0.0;
if (_track != null) {
DataPoint prevPrevPoint = null, prevPoint = null, point = null;
for (int i = 0; i < _track.getNumPoints(); i++) {
point = _track.getPoint(i);
if (prevPrevPoint != null
&& prevPrevPoint.hasTimestamp()
&& prevPoint != null
&& prevPoint.hasTimestamp()
&& point != null
&& point.hasTimestamp()) {
// All three points have timestamps
double seconds = point.getTimestamp().getSecondsSince(prevPrevPoint.getTimestamp());
if (seconds > 0) {
double distInRads =
DataPoint.calculateRadiansBetween(prevPrevPoint, prevPoint)
+ DataPoint.calculateRadiansBetween(prevPoint, point);
double dist =
Distance.convertRadiansToDistance(
distInRads, _metric ? Units.KILOMETRES : Units.MILES);
// Store the value and maintain max and min values
double value = dist / seconds * 60.0 * 60.0;
_pointValues[i - 1] = value;
if (value < _minValue || _minValue == 0.0) {
_minValue = value;
}
if (value > _maxValue) {
_maxValue = value;
}
_hasData = true;
_pointHasData[i - 1] = true;
}
}
// Exchange points
prevPrevPoint = prevPoint;
prevPoint = point;
}
}
}
