// GET: Color
public ActionResult Resistor()
{
ViewBag.Message = "Calculate the Ohms of your resistor";
ColorBands vs = new ColorBands();
return(View(vs));
}
public ActionResult Index(TilesData tilesData)
{
Heatmap tile = new Heatmap(256, 256, tilesData.x, tilesData.y, tilesData.zoom);
BoundingBox boundingBox = tile.GetBoundingBox(TileBuffer);
double tolerance = GetPolygonTolerance(tilesData.zoom);
var boundingGeo = boundingBox.GetDbGeography();
using (var context = ContextFactory.SizeUpContext)
{
var kvf = new List <KeyValue <DbGeography, Band <double> > >();
if (tilesData != null && tilesData.Bands != null)
{
var geoIdList = (from b in tilesData.Bands from s in b.band select s.geoId).ToList();
var goegraphies = context.Geographies.Where(i => geoIdList.Contains(i.Id));
var kv = goegraphies.Select(i => new KeyValue <DbGeography, double>()
{
Key = SqlSpatialFunctions.Reduce(i.Polygon, tolerance).Intersection(boundingGeo),
Value = i.Id
}).ToList();
kvf = (from tl in tilesData.Bands
from t in tl.band
from k in kv
where k.Value == t.geoId
select
new KeyValue <DbGeography, Band <double> >(k.Key, new Band <double>()
{
Min = t.min, Max = t.max
}))
.ToList();
}
var quantiles = kvf
.Where(i => i.Value != null)
.NTileDescending(i => i.Value.Max, 5);
ColorBands colorBands = new ColorBands(ColorTranslator.FromHtml("#" + tilesData.startColor), ColorTranslator.FromHtml("#" + tilesData.endColor), quantiles.Count());
string[] bandList = colorBands.GetColorBands().ToArray();
var validValues = quantiles
.Select((i, index) => i.Where(g => g.Key != null).Select(g => new GeographyEntity()
{
Geography = SqlGeography.Parse(g.Key.AsText()), Color = bandList[index]
}))
.SelectMany(i => i)
.ToList();
var invalidValues = kvf
.Where(i => i.Value == null)
.Where(i => i.Key != null)
.Select(g => new GeographyEntity()
{
Geography = SqlGeography.Parse(g.Key.AsText())
})
.ToList();
var output = validValues.Union(invalidValues).ToList();
tile.Draw(output);
var stream = new MemoryStream();
tile.Bitmap.Save(stream, ImageFormat.Png);
return(File(stream.GetBuffer(), "image/png"));
}
}
