public async Task <List <float> > GetValuesAsync(RandomFieldNature nature, float seed,
List <Vector2> queryPositions)
{
Dictionary <MyRectangle, IntensityFieldFigure> segmentsDict = null;
var randomFieldFigureId = new RandomFieldFigureId(nature, seed);
if (!_figuresDictionary.ContainsKey(randomFieldFigureId))
{
segmentsDict = new Dictionary <MyRectangle, IntensityFieldFigure>();
_figuresDictionary[randomFieldFigureId] = segmentsDict;
}
else
{
segmentsDict = _figuresDictionary[randomFieldFigureId];
}
List <MyRectangle> segmentCoordsList = new List <MyRectangle>(queryPositions.Count);
for (int i = 0; i < queryPositions.Count; i++)
{
segmentCoordsList.Add(CalculateSegment(queryPositions[i]));
}
List <MyRectangle> distinctCoords = segmentCoordsList.Distinct().ToList();
List <MyRectangle> coordsToCreateFigureFor =
distinctCoords.Where(c => !segmentsDict.ContainsKey(c)).ToList();
if (coordsToCreateFigureFor.Any())
{
var createdFigures = await TaskUtils.WhenAll(Enumerable.Range(0, coordsToCreateFigureFor.Count).Select(
(i) =>
{
var coord = coordsToCreateFigureFor[i];
return(_figureGenerator.GenerateRandomFieldFigureAsync(nature, seed, coord));
}));
for (int i = 0; i < coordsToCreateFigureFor.Count; i++)
{
var coord = coordsToCreateFigureFor[i];
segmentsDict[coord] = createdFigures[i];
}
}
List <float> outList = new List <float>(queryPositions.Count);
for (int i = 0; i < queryPositions.Count; i++)
{
var position = queryPositions[i];
var segmentCoords = segmentCoordsList[i];
IntensityFieldFigure fieldFigure = segmentsDict[segmentCoords];
var inFigureUv = new Vector2((position.x - segmentCoords.X) / segmentCoords.Width,
(position.y - segmentCoords.Y) / segmentCoords.Height);
outList.Add(fieldFigure.GetPixelWithUv(inFigureUv));
}
return(outList);
}
protected bool Equals(RandomFieldFigureId other)
{
return(Equals(_nature, other._nature) && seed.Equals(other.seed));
}