private RaycastMapResult RayCastToMap(Point startPoint)
{
RayHitTestResult rayHitTestResult = VisualTreeHelper.HitTest(viewport, startPoint) as RayHitTestResult;
if (rayHitTestResult != null)
{
Point3D hitPoint = rayHitTestResult.PointHit;
// Convert to tile coords
var hitPointOnTile = new Vector2 <double>(hitPoint.X - rayHitTestResult.ModelHit.Bounds.X, -(rayHitTestResult.ModelHit.Bounds.Y - hitPoint.Y));
hitPointOnTile.X = 4096 - hitPointOnTile.X;
hitPointOnTile = hitPointOnTile.Multiply(2);
Projection projection = CalculateProjection();
var hitTile = new Vector2 <double>(hitPoint.X, hitPoint.Y).Divide(4096).ToVectorInt().Multiply(4096);
double startPosX = (int)Math.Floor((hitTile.X - (projection.Bottom / 2)) / 4096) + 1;
double startPosY = (int)Math.Floor((hitTile.Y - (projection.Left / 2)) / 4096) + 1;
double cZoom = dataController.ConvertToMapZoom(zoom);
Vector2 <double> startTileCoordinations = MercatorProjection.LatLngToTile(Settings.startPosition, cZoom);
LatLng tileLatLng = MercatorProjection.TileToLatLng(new Vector2 <double>(startTileCoordinations.X - startPosX, startTileCoordinations.Y + startPosY), cZoom);
//LatLng pointLatLng = MercatorProjection.TileToLatLng(, cZoom);
Vector2 <double> tile = MercatorProjection.LatLngToTile(tileLatLng, cZoom).Floor();
Graph graph = dataController.GetRoads(new Vector3 <double>(tile.X, tile.Y, cZoom));
help.Content = graph.FindNearest(hitPointOnTile);
return(new RaycastMapResult(tileLatLng, hitPointOnTile, hitPoint));
}
return(null);
}
public void TestMercatorProjection()
{
LatLng startPosition = new LatLng(48.464717, 35.046183);
Vector2 <double> tile = MercatorProjection.LatLngToTile(startPosition, 13);
LatLng latLng = MercatorProjection.TileToLatLng(tile, 13);
LatLng latLng1 = MercatorProjection.TileToLatLng(tile.X, tile.Y, 13);
Assert.IsTrue(startPosition.IsEquals(latLng.Round(6)) && startPosition.IsEquals(latLng1.Round(6)));
}
