private static List <TimedPosition> LimitValues(List <TimedPosition> values, int count, TimeSpan timeFrom, TimeSpan timeTo, bool isMin)
{
//if (values.Count <= count)
// return values;
List <TimedPosition> result = new List <TimedPosition>();
result.Add(values.First());
PositionCollection positions = new PositionCollection(values);
TimeSpan duration = timeTo - timeFrom;
TimeSpan step = duration.Divide(count);
int indexMin = (int)Math.Floor((values.First().TimeStamp - timeFrom).Divide(step));
int indexMax = (int)Math.Floor((values.Last().TimeStamp - timeFrom).Divide(step));
for (int index = indexMin; index <= indexMax; index++)
{
TimeSpan tFrom = timeFrom + step.Multiply(index);
TimeSpan tTo = timeFrom + step.Multiply(index + 1);
var pos = positions.GetPositions(tFrom, tTo);
byte value;
if (isMin)
{
value = (byte)Math.Max(0, pos.Min(p => p.Position) - 5);
}
else
{
value = (byte)Math.Min(99, pos.Max(p => p.Position) + 5);
}
TimeSpan center = timeFrom + step.Multiply(index + 0.5);
result.Add(new TimedPosition
{
Position = value,
TimeStamp = center
});
}
result.Add(values.Last());
return(result);
}
public static Brush Generate3(List <TimedPosition> beats, TimeSpan gapDuration, TimeSpan timeFrom, TimeSpan timeTo, double multiplier, out Geometry bounds)
{
PositionCollection pc = new PositionCollection(beats);
List <TimedPosition> trimmedBeats = pc.GetPositions(timeFrom, timeTo).ToList();
List <HeatMapEntry> stops = new List <HeatMapEntry>();
List <List <TimedPosition> > segments = GetSegments(trimmedBeats, gapDuration, timeFrom, timeTo);
TimeSpan fastest = TimeSpan.FromMilliseconds(200);
TimeSpan duration = timeTo - timeFrom;
stops.Add(new HeatMapEntry(Colors.Transparent, 0.0));
foreach (List <TimedPosition> segment in segments)
{
if (segment.Count == 1)
{
TimeSpan stamp = segment.Single().TimeStamp;
TimeSpan span = TimeSpan.FromSeconds(2);
TimeSpan beginSegment = stamp - span;
if (beginSegment < timeFrom)
{
beginSegment = timeFrom;
}
TimeSpan endSegment = stamp + span;
if (endSegment > timeTo)
{
endSegment = timeTo;
}
stops.Add(new HeatMapEntry(Colors.Transparent, beginSegment.Divide(duration)));
stops.Add(new HeatMapEntry(Colors.DodgerBlue, beginSegment.Divide(duration)));
stops.Add(new HeatMapEntry(Colors.DodgerBlue, endSegment.Divide(duration)));
stops.Add(new HeatMapEntry(Colors.Transparent, endSegment.Divide(duration)));
}
else
{
TimeSpan span = segment.Last().TimeStamp - segment.First().TimeStamp;
int segmentCount = (int)Math.Max(1, Math.Min((segment.Count - 1) / 12.0, span.Divide(duration.Divide(200))));
stops.Add(new HeatMapEntry(Colors.Transparent, (segment.First().TimeStamp - timeFrom).Divide(duration)));
for (int i = 0; i < segmentCount; i++)
{
int startIndex = Math.Min(segment.Count - 1, (int)((i * (segment.Count - 1)) / (double)segmentCount));
int endIndex = Math.Min(segment.Count - 1, (int)(((i + 1) * (segment.Count - 1)) / (double)segmentCount));
int beatCount = endIndex - startIndex - 1;
TimeSpan firstBeat = segment[startIndex].TimeStamp;
TimeSpan lastBeat = segment[endIndex].TimeStamp;
TimeSpan averageLength = (lastBeat - firstBeat).Divide(beatCount);
double value = fastest.Divide(averageLength) * multiplier;
value = Math.Min(1, Math.Max(0, value));
Color color = GetColorAtPosition(HeatMap, value);
double positionStart = firstBeat.Divide(duration);
double positionEnd = lastBeat.Divide(duration);
if (i == 0)
{
stops.Add(new HeatMapEntry(color, positionStart));
}
stops.Add(new HeatMapEntry(color, (positionEnd + positionStart) / 2.0));
if (i == segmentCount - 1)
{
stops.Add(new HeatMapEntry(color, positionEnd));
}
}
stops.Add(new HeatMapEntry(Colors.Transparent, (segment.Last().TimeStamp - timeFrom).Divide(duration)));
}
}
stops.Add(new HeatMapEntry(Colors.Transparent, 1.0));
LinearGradientBrush brush = new LinearGradientBrush(FillGradients(stops), new Point(0, 0), new Point(1, 0));
brush.MappingMode = BrushMappingMode.RelativeToBoundingBox;
GetMinMaxPositions(trimmedBeats, out List <TimedPosition> min, out List <TimedPosition> max);
bounds = BuildBoundsGeometry(timeFrom, timeTo, min, max);
return(brush);
}