public static Boundary GetBoundaryExtended(JsonGetMarkersReceive input)
{
var deltas = GetDelta(GmcSettings.Get.Gridx, GmcSettings.Get.Gridy, input.Zoomlevel);
var deltaX = deltas[0];
var deltaY = deltas[1];
// Grid with extended outer grid-area non-visible
var a = MathTool.FloorLatLon(input.Viewport.Minx, deltaX) - deltaX * GmcSettings.Get.OuterGridExtend;
var b = MathTool.FloorLatLon(input.Viewport.Miny, deltaY) - deltaY * GmcSettings.Get.OuterGridExtend;
var a2 = MathTool.FloorLatLon(input.Viewport.Maxx, deltaX) + deltaX * (1 + GmcSettings.Get.OuterGridExtend);
var b2 = MathTool.FloorLatLon(input.Viewport.Maxy, deltaY) + deltaY * (1 + GmcSettings.Get.OuterGridExtend);
// Latitude is special with Google Maps, they don't wrap around, then do constrain
b = MathTool.ConstrainLatitude(b);
b2 = MathTool.ConstrainLatitude(b2);
var grid = new Boundary {
Minx = a, Miny = b, Maxx = a2, Maxy = b2
};
grid.Normalize();
return(grid);
}
public static Boundary GetBoundaryExtended(MarkersInput input)
{
var deltas = GetDelta(GmcConfiguration.Get.GridX, GmcConfiguration.Get.GridY, input.Zoomlevel);
var deltaX = deltas[0];
var deltaY = deltas[1];
// Grid with extended outer grid-area non-visible
var a = MathTool.FloorLatLon(input.Viewport.MinX, deltaX) - deltaX * GmcConfiguration.Get.OuterGridExtend;
var b = MathTool.FloorLatLon(input.Viewport.MinY, deltaY) - deltaY * GmcConfiguration.Get.OuterGridExtend;
var a2 = MathTool.FloorLatLon(input.Viewport.MaxX, deltaX) + deltaX * (1 + GmcConfiguration.Get.OuterGridExtend);
var b2 = MathTool.FloorLatLon(input.Viewport.MaxY, deltaY) + deltaY * (1 + GmcConfiguration.Get.OuterGridExtend);
// Latitude is special with Google Maps, they don't wrap around, then do constrain
b = MathTool.ConstrainLatitude(b);
b2 = MathTool.ConstrainLatitude(b2);
var grid = new Boundary {
MinX = a, MinY = b, MaxX = a2, MaxY = b2
};
grid.Normalize();
return(grid);
}
/// <summary>
/// For debugging purpose
/// Display the red grid lines on the map to show how the points are clustered
/// </summary>
/// <returns></returns>
public IList <Line> GetPolyLines()
{
if (!GmcSettings.Get.DoShowGridLinesInGoogleMap)
{
return(null); // server disabled it
}
if (!_jsonReceive.IsDebugLinesEnabled)
{
return(null); // client disabled it
}
// Make the red lines data to be drawn in Google map
var temp = new List <Rectangle>();
const int borderLinesAdding = 1;
var linesStepsX = (int)(Math.Round(Grid.AbsX / DeltaX) + borderLinesAdding);
var linesStepsY = (int)(Math.Round(Grid.AbsY / DeltaY) + borderLinesAdding);
var b = new Boundary(Grid);
const double restrictLat = 5.5; // heuristic value, Google maps related
b.Miny = MathTool.ConstrainLatitude(b.Miny, restrictLat); // Make sure it is visible on screen, restrict by some value
b.Maxy = MathTool.ConstrainLatitude(b.Maxy, restrictLat);
// Vertical lines
for (var i = 0; i < linesStepsX; i++)
{
var xx = b.Minx + i * DeltaX;
// Draw region
if (_jsonReceive.Zoomlevel > 3) // heuristic value, Google maps related
{
temp.Add(new Rectangle {
Minx = xx, Miny = b.Miny, Maxx = xx, Maxy = b.Maxy
});
}
// World wrap issue when same latlon area visible multiple times
// Make sure line is drawn from left to right on screen
else
{
temp.Add(new Rectangle {
Minx = xx, Miny = LatLonInfo.MinLatValue + restrictLat, Maxx = xx, Maxy = 0
});
temp.Add(new Rectangle {
Minx = xx, Miny = 0, Maxx = xx, Maxy = LatLonInfo.MaxLatValue - restrictLat
});
}
}
// Horizontal lines
for (var i = 0; i < linesStepsY; i++)
{
var yy = b.Miny + i * DeltaY;
// Draw region
if (_jsonReceive.Zoomlevel > 3) // heuristic value
{
// Don't draw lines outsize the world
if (MathTool.IsLowerThanLatMin(yy) || MathTool.IsGreaterThanLatMax(yy))
{
continue;
}
temp.Add(new Rectangle {
Minx = b.Minx, Miny = yy, Maxx = b.Maxx, Maxy = yy
});
}
// World wrap issue when same latlon area visible multiple times
// Make sure line is drawn from left to right on screen
else
{
temp.Add(new Rectangle {
Minx = LatLonInfo.MinLonValue, Miny = yy, Maxx = 0, Maxy = yy
});
temp.Add(new Rectangle {
Minx = 0, Miny = yy, Maxx = LatLonInfo.MaxLonValue, Maxy = yy
});
}
}
var lines = new List <Line>();
// Normalize the lines and add as string
foreach (var line in temp)
{
var x = (line.Minx).NormalizeLongitude().DoubleToString();
var x2 = (line.Maxx).NormalizeLongitude().DoubleToString();
var y = (line.Miny).NormalizeLatitude().DoubleToString();
var y2 = (line.Maxy).NormalizeLatitude().DoubleToString();
lines.Add(new Line {
X = x, Y = y, X2 = x2, Y2 = y2
});
}
return(lines);
}