public override DVector2 WorldToTilePos(double lon, double lat, int zoom)
{
lat = DMathUtil.Clamp(lat, MinLatitude, MaxLatitude);
lon = DMathUtil.Clamp(lon, MinLongitude, MaxLongitude);
lat = lat <MinLatitude?MinLatitude : lat> MaxLatitude ? MaxLatitude : lat;
lon = lon <MinLongitude?MinLongitude : lon> MaxLongitude ? MaxLongitude : lon;
double rLon = lon * DEG_RAD; // Math.PI / 180;
double rLat = lat * DEG_RAD; // Math.PI / 180;
double a = 6378137;
double k = 0.0818191908426;
double z = Math.Tan(MathPiDiv4 + rLat / 2) / Math.Pow((Math.Tan(MathPiDiv4 + Math.Asin(k * Math.Sin(rLat)) / 2)), k);
double z1 = Math.Pow(2, 23 - zoom);
double DX = ((20037508.342789 + a * rLon) * 53.5865938 / z1) / 256.0;
double DY = ((20037508.342789 - a * Math.Log(z)) * 53.5865938 / z1) / 256.0;
DVector2 ret = DVector2.Zero;
ret.X = DX;
ret.Y = DY;
return(ret);
}
void UpdateCamera()
{
var input = Game.InputDevice;
if (input.IsKeyDown(Keys.LeftShift) && input.IsKeyDown(Keys.MiddleButton))
{
FreeCamYaw += input.RelativeMouseOffset.X * 0.003;
FreeCamPitch -= input.RelativeMouseOffset.Y * 0.003;
FreeCamPitch = DMathUtil.Clamp(FreeCamPitch, -Math.PI / 2.01, 0.0);
}
}