public static IEnumerable <HexagonLocationUV> GetHexagonsIntersectedByLine(PointXY startPoint, PointXY endPoint, HexagonDefinition hexagonDefinition)
{
var startHexagon = HexagonUtils.GetHexagonLocationUVForPointXY(startPoint, hexagonDefinition);
var endHexagon = HexagonUtils.GetHexagonLocationUVForPointXY(endPoint, hexagonDefinition);
var minU = new[] { startHexagon.U, endHexagon.U }.Min() - 1;
var maxU = new[] { startHexagon.U, endHexagon.U }.Max() + 1;
var minV = new[] { startHexagon.V, endHexagon.V }.Min() - 1;
var maxV = new[] { startHexagon.V, endHexagon.V }.Max() + 1;
var matchingHexagons = new List <HexagonLocationUV>();
for (var u = minU; u <= maxU; u++)
{
for (var v = minV; v <= maxV; v++)
{
var points = HexagonUtils.GetPointsXYOfHexagon(new HexagonLocationUV(u, v), hexagonDefinition);
for (var k = 0; k < points.Count() - 1; k++)
{
var p0 = points[k];
var p1 = points[k + 1];
if (GetLineIntersection(p0, p1, startPoint, endPoint) != null)
{
matchingHexagons.Add(new HexagonLocationUV(u, v));
break;
}
}
}
}
return(matchingHexagons);
}
private IEnumerable <Hexagon> ProcessPixel(GeoData geoData, LayersLoaderTarget[] targets)
{
foreach (PointXY[] coordinates in geoData.Points)
{
if (coordinates.Length == 1)
//Single point mode
{
var hexagonLocation = HexagonUtils.GetHexagonLocationUVForPointXY(coordinates[0], hexagonDefinition);
yield return(CreateHexagon(geoData, targets, hexagonLocation, (geo, target) => target.Handler == null ? 1 : valueHandlerFactory.GetInstance(target.Handler).GetValue(geo)));
}
else
//Square mode
{
IList <HexagonLocationUV> hexagons = HexagonUtils.GetHexagonsInsideBoundingBox(coordinates[0], coordinates[1], hexagonDefinition).ToList();
foreach (var hexagonLocation in hexagons)
{
yield return(CreateHexagon(geoData, targets, hexagonLocation, (geo, target) => target.Handler == null ? 1 : valueHandlerFactory.GetInstance(target.Handler).GetValue(geo)));
}
}
}
}
public void GetHexagonLocationUVForPointXY(double x, double y, int u, int v)
{
var hexagonLocationUV = HexagonUtils.GetHexagonLocationUVForPointXY(new PointXY(x, y), _hexagonDefinition);
Assert.Equal(new HexagonLocationUV(u, v), hexagonLocationUV);
}