private async Task PreloadDays(DateTime referenceDate, int days)
{
if (days < 0)
{
MinimumDateLoaded = referenceDate.AddDays(days);
}
if (days > 0)
{
MaximumDateLoaded = referenceDate.AddDays(days);
}
var start = IntHelper.GetMin(0, days);
var end = IntHelper.GetMax(0, days);
for (var i = start; i <= end; i++)
{
if (i != 0)
{
var loadDate = referenceDate.AddDays(i).GetClosestUtcZeroTime();
var model = SolarSystem.Helpers.Seeder.CelestialObjectSeedHelper.GetSunPosition(loadDate);
await DataLoader.LoadAsync(DataLoading.Preload, model).ConfigureAwait(false);
}
}
}
private async Task Preload(DateTime referenceDate)
{
var loadThreshold = 10 * DaySkip;
var loadBoundary = IntHelper.GetMax(10 * DaySkip, DataConnectionHelper.GetPositionDaysForDataConnection());
if (loadThreshold <= 0)
{
loadThreshold = loadBoundary;
}
if (referenceDate.AddDays(loadThreshold) > MaximumDateLoaded)
{
await PreloadDays(MaximumDateLoaded, loadBoundary).ConfigureAwait(false);
}
if (referenceDate.AddDays(-loadThreshold) < MinimumDateLoaded)
{
await PreloadDays(MinimumDateLoaded, -loadBoundary).ConfigureAwait(false);
}
}
private static DrawParameterModel GetDrawParameters(SKImageInfo info, IEnumerable <CelestialDrawModel> orbits, ObjectCollectionLayout objectCollectionLayout)
{
var maxCanvasWidth = info.Width;
var maxCanvasHeight = info.Height;
int maxCanvas;
var maximumOrbitRadius = orbits.Max(x => x.Radius);
int centreX;
int centreY;
var orientation = DrawOrientation.Horizontal;
if (objectCollectionLayout == ObjectCollectionLayout.Position)
{
centreX = (int)Math.Floor(maxCanvasWidth / (double)2);
centreY = (int)Math.Floor(maxCanvasHeight / (double)2);
maxCanvas = IntHelper.GetMin(centreX, centreY);
}
else
{
if (maxCanvasHeight > maxCanvasWidth)
{
orientation = DrawOrientation.Vertical;
}
centreX = orientation == DrawOrientation.Horizontal ? 0 : (int)Math.Floor((double)maxCanvasWidth / 2);
centreY = orientation == DrawOrientation.Vertical ? maxCanvasHeight : (int)Math.Floor((double)maxCanvasHeight / 2);
maxCanvas = IntHelper.GetMax(maxCanvasWidth, maxCanvasHeight);
}
var orbitFactor = (int)Math.Floor((maxCanvas - SunRadius) / maximumOrbitRadius);
return(new DrawParameterModel(objectCollectionLayout, orientation, centreX, centreY, orbitFactor));
}