// use 10^n * 1, 2, or 5 as marker intervals
public static Scale CreateScale(double minValue, double maxValue, int maxNoOfMarkers, bool adjustStartAndEndValues)
{
Scale scale = new Scale();
if (maxNoOfMarkers < 2)
{
maxNoOfMarkers = 2;
}
double intervalLength = Math.Abs(maxValue - minValue);
if (intervalLength == 0)
{
intervalLength = double.Epsilon;
}
double minMarkerInterval = intervalLength / (maxNoOfMarkers - 1);
double firstMarkerValue;
double lastMarkerValue;
double log10 = Math.Log10(minMarkerInterval);
int n = (int)Math.Floor(log10);
double scaledMinMarkerInterval = minMarkerInterval / Math.Pow(10, n); // 1 <= scaledMinMarkerInterval < 10
double markerInterval;
if (scaledMinMarkerInterval <= 2)
{
markerInterval = 2 * Math.Pow(10, n);
}
else if (scaledMinMarkerInterval <= 5)
{
markerInterval = 5 * Math.Pow(10, n);
}
else
{
markerInterval = 10 * Math.Pow(10, n);
}
if (adjustStartAndEndValues)
{
firstMarkerValue = Math.Floor(minValue / markerInterval) * markerInterval;
lastMarkerValue = Math.Ceiling(maxValue / markerInterval) * markerInterval;
scale.Start = new Distance(firstMarkerValue);
scale.End = new Distance(lastMarkerValue);
}
else
{
scale.Start = new Distance(minValue);
scale.End = new Distance(maxValue);
firstMarkerValue = Math.Floor(minValue / markerInterval) * markerInterval;
if (firstMarkerValue < minValue)
{
firstMarkerValue += markerInterval;
}
lastMarkerValue = Math.Ceiling(maxValue / markerInterval) * markerInterval;
if (lastMarkerValue > maxValue)
{
lastMarkerValue -= markerInterval;
}
}
scale.Markers = new List <IUnit>();
for (double value = firstMarkerValue; value <= lastMarkerValue; value += markerInterval)
{
scale.Markers.Add(new Distance(value));
}
return(scale);
}
public static Scale CreateScale(double minValue, double maxValue, int maxNoOfMarkers, bool adjustStartAndEndValues)
{
double[] VALID_MARKER_INTERVALS = new double[] { 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, 15, 30, 1 * 60, 2 * 60, 5 * 60, 15 * 60, 30 * 60, 1 * 3600, 2 * 3600, 6 * 3600, 12 * 3600, 24 * 3600 };
Scale scale = new Scale();
if (maxNoOfMarkers < 2)
{
maxNoOfMarkers = 2;
}
double intervalLength = Math.Abs(maxValue - minValue);
if (intervalLength == 0)
{
intervalLength = double.Epsilon;
}
double minMarkerInterval = intervalLength / (maxNoOfMarkers - 1);
double firstMarkerValue;
double lastMarkerValue;
double markerInterval = VALID_MARKER_INTERVALS[VALID_MARKER_INTERVALS.Length - 1];
foreach (double mi in VALID_MARKER_INTERVALS)
{
if (minMarkerInterval < mi)
{
markerInterval = mi;
break;
}
}
if (adjustStartAndEndValues)
{
firstMarkerValue = Math.Floor(minValue / markerInterval) * markerInterval;
lastMarkerValue = Math.Ceiling(maxValue / markerInterval) * markerInterval;
scale.Start = new ElapsedTime(firstMarkerValue);
scale.End = new ElapsedTime(lastMarkerValue);
}
else
{
scale.Start = new ElapsedTime(minValue);
scale.End = new ElapsedTime(maxValue);
firstMarkerValue = Math.Floor(minValue / markerInterval) * markerInterval;
if (firstMarkerValue < minValue)
{
firstMarkerValue += markerInterval;
}
lastMarkerValue = Math.Ceiling(maxValue / markerInterval) * markerInterval;
if (lastMarkerValue > maxValue)
{
lastMarkerValue -= markerInterval;
}
}
scale.Markers = new List <IUnit>();
for (double value = firstMarkerValue; value <= lastMarkerValue; value += markerInterval)
{
scale.Markers.Add(new ElapsedTime(value));
}
return(scale);
}
