// Converts a WMS tile coordinate (z,x,y) into a wgs bounding box
inline void xyzToWGS84(
const int x, const int y, const int z, double &minx, double &miny, double &maxx, double &maxy)
{
minx = x * TILE_SIZE;
miny = (y + 1.0) * TILE_SIZE;
maxx = (x + 1.0) * TILE_SIZE;
maxy = y * TILE_SIZE;
// 2^z * TILE_SIZE
const double shift = (1u << static_cast<unsigned>(z)) * TILE_SIZE;
pixelToDegree(shift, minx, miny);
pixelToDegree(shift, maxx, maxy);
}
double LatLonConvert::bottomNorth()
{
if (isGu()) {
return northGreenich.southDegree(90);
}else {
double d = pixelToDegree((int)scrDaegak());
double np = northGreenich.southDegree(d);
double dy = mppToDegree();
return baseWJ(np, dy) - dy;
}
}
double LatLonConvert::mppToDegree()
{
double degree = pixelToDegree(qMin(srcHeight(), srcHeight()));
double dy = 10.0;
if (degree < 1) {
dy = 0.1;
}else if(degree < 4) {
dy = 0.5;
}else if(degree < 8) {
dy = 1.0;
}else if(degree < 40) {
dy = 5.0;
}else {
dy = 10.0;
}
return dy;
}
double LatLonConvert::rightGreenich()
{
if (isGu()) {
return northGreenich.eastDegree(180);
}else {
double d = pixelToDegree((int)scrDaegak());
NorthGreenichPoint p1, p2;
p1.set(north(), greenich());
p1.moveEast(d);
p1.moveNorth(d);
p2.set(north(), greenich());
p2.moveEast(d);
p2.moveSouth(d);
double gp = qMax(p1.greenich(), p2.greenich());
gp = northGreenich.eastDegree(d);
double dy = mppToDegree();
double max = baseWJ(gp, dy) + dy + dy;
return max;
}
}
double LatLonConvert::leftGreenich()
{
if (isGu()) {
return northGreenich.westDegree(180);
}else {
double d = pixelToDegree((int)scrDaegak());
NorthGreenichPoint p1, p2;
p1.set(north(), greenich());
p1.moveNorth(d);
p1.moveWest(d);
p2.set(north(), greenich());
p2.moveSouth(d);
p2.moveWest(d);
double gp = qMin(p1.greenich(), p2.greenich());
gp = northGreenich.westDegree(d);
double dy = mppToDegree();
double min = baseWJ(gp, dy) - dy;
return min;
}
}
