public async Task given_feature_in_projected_coords_process_into_basic_tile()
{
Container.GetService <MockContextRepository>().TryGetAs <MockTileContext>("base", out MockTileContext context);
var accessor = new LayerTileCacheAccessor(() => null, () => new MockRawCacheStorage());
var generator = new Generator(context, accessor, new LayerInitializationFileService(Container.GetService <IFileProvider>()));
await generator.GenerateTile(0, 0, 0);
var tile = accessor.GetRawTile(context.Identifier, 0, 0, 0);
Assert.AreEqual(0d, tile.X);
Assert.AreEqual(0d, tile.Y);
Assert.AreEqual(1d, tile.ZoomSquared);
Assert.AreEqual(386, tile.NumberOfPoints);
Assert.AreEqual(6, tile.NumberOfSimplifiedPoints);
Assert.AreEqual(1, tile.NumberOfFeatures);
}
public void given_feature_in_projected_coords_process_into_second_level_tile()
{
Container.GetService <MockContextRepository>().TryGetAs <MockTileContext>("base", out MockTileContext context);
var coloradoFeature = Container.GetService <IConfigurationStrategy>().Into <List <Feature> >("colorado_outline_projected");
context.TileFeatures = coloradoFeature;
var accessor = new LayerTileCacheAccessor(() => null, () => new MockRawCacheStorage());
var generator = new Generator(context, accessor, new LayerInitializationFileService(Container.GetService <IFileProvider>()));
generator.SplitTile(context.TileFeatures.ToArray(), zoom: 0, x: 0, y: 0, currentZoom: 1, currentX: 0, currentY: 0);
generator.SplitTile(context.TileFeatures.ToArray(), zoom: 1, x: 0, y: 0, currentZoom: 2, currentX: 0, currentY: 1);
generator.SplitTile(context.TileFeatures.ToArray(), zoom: 2, x: 0, y: 1, currentZoom: 3, currentX: 1, currentY: 3);
var tile = accessor.GetRawTile(context.Identifier, 0, 0, 0);
Assert.AreEqual(0d, tile.X);
Assert.AreEqual(0d, tile.Y);
Assert.AreEqual(1d, tile.ZoomSquared);
Assert.AreEqual(386, tile.NumberOfPoints);
Assert.AreEqual(6, tile.NumberOfSimplifiedPoints);
Assert.AreEqual(1, tile.NumberOfFeatures);
}
public async Task <ITile> GenerateTile(int zoomLevel = 0, double x = 0, double y = 0)
{
if (tileContext.TileFeatures == null)
{
if (tileInitService == null)
{
throw new NotSupportedException("The Features were null and the Generator attempted to initialize a layer with a null LayerInitializer.");
}
tileContext.TileFeatures = await tileInitService.InitializeLayer(tileContext.Identifier);
// This is only called at the beginning //
SplitTile(tileContext.TileFeatures.ToArray(),
zoom: 0, x: 0, y: 0, currentZoom: null, currentX: null, currentY: null);
}
// x must be the reduced value from the squared version of the zoom //
// verify that the caller used this algorithm: //
var zoomSqr = 1 << zoomLevel;
var xDenom = ((x % zoomSqr) + zoomSqr) % zoomSqr; //
if (xDenom != x)
{
throw new NotSupportedException($"The value for X (current value:{x}) was not properly calculated.");
}
var tile = cacheAccessor.GetRawTile(tileContext.Identifier, zoomLevel, x, y);
if (tile != null)
{
return(tile);
}
var z0 = zoomLevel;
var x0 = x;
var y0 = y;
ITile parent = null;
while (parent == null && z0 > 0)
{
z0--;
x0 = Math.Floor(x0 / 2);
y0 = Math.Floor(y0 / 2);
parent = cacheAccessor.GetRawTile(tileContext.Identifier, z0, x0, y0);
}
if (parent == null || parent.Source == null)
{
return(null);
}
if (transform.IsClippedSquare(parent, tileContext.Extent, tileContext.Buffer))
{
return(parent);
}
var solid = SplitTile(parent.Source.ToArray(), z0, (int)x0, (int)y0, zoomLevel, (int)x, (int)y);
ITile currentTile = null;
if (solid.HasValue)
{
var m = 1 << (zoomLevel - solid);
currentTile = cacheAccessor.GetRawTile(tileContext.Identifier,
solid.Value, (int)Math.Floor((double)(x / m)), (int)Math.Floor((double)(y / m)));
}
else
{
currentTile = cacheAccessor.GetRawTile(tileContext.Identifier, zoomLevel, x, y);
}
return(currentTile);
}
