/**
* Get the lower right (southeast) point of the projection.
*
* <p>Returns the lower right point (or closest equivalent) of the projection based on the center
* point and height and width of screen.
*
* <p>This is trivial for most cylindrical projections, but much more complicated for azimuthal
* projections.
*
* @return LatLonPoint
*/
public LatLonPoint getLowerRight() {
LatLonPoint tmp = new LatLonPoint.Double();
double lat, lon;
// over north pole
if (overNorthPole()) {
lon = DATELINE;
if (overEquator()) {
// get bottom center for latitude
inverse(width / 2, height, tmp);
lat = tmp.getRadLat();
} else {
// get bottom right corner for latitude
inverse(width, height, tmp);
lat = tmp.getRadLat();
}
}
// over south pole
else if (overSouthPole()) {
lat = SOUTH_POLE;
lon = DATELINE;
}
// view in northern hemisphere
else if (tmp.getRadLat() >= 0f) {
// get the right top corner for longitude
inverse(width, 0, tmp);
lon = tmp.getRadLon();
if (overEquator()) {
// get the bottom center (for latitude)
inverse(width / 2, height, tmp);
lat = tmp.getRadLat();
} else {
// get the right bottom corner (for latitude)
inverse(width, height, tmp);
lat = tmp.getRadLat();
}
}
// view in southern hemisphere
else {
// get the right bottom corner for longitude
inverse(width, height, tmp);
lon = tmp.getRadLon();
// get bottom center for latitude
inverse(width / 2, height, tmp);
lat = tmp.getRadLat();
}
tmp.setLatLon(lat, lon, true);
// Debug.output("lr="+tmp);
return tmp;
}
/**
* Get the upper left (northernmost and westernmost) point of the projection.
*
* <p>Returns the upper left point (or closest equivalent) of the projection based on the center
* point and height and width of screen.
*
* @return LatLonPoint
*/
public LatLonPoint getUpperLeft() {
LatLonPoint tmp = new LatLonPoint.Double();
double lat, lon;
// over north pole
if (overNorthPole()) {
lat = NORTH_POLE;
lon = -DATELINE;
}
// over south pole
else if (overSouthPole()) {
lon = -DATELINE;
if (overEquator()) {
// get top center for latitude
inverse(width / 2, 0, tmp);
lat = tmp.getRadLat();
} else {
// get left top corner for latitude
inverse(0, 0, tmp);
lat = tmp.getRadLat();
}
}
// view in northern hemisphere
else if (tmp.getRadLat() >= 0) {
// get left top corner for longitude
inverse(0, 0, tmp);
lon = tmp.getRadLon();
// get top center for latitude
inverse(width / 2, 0, tmp);
lat = tmp.getRadLat();
}
// view in southern hemisphere
else {
// get left bottom corner for longitude
inverse(0, height, tmp);
lon = tmp.getRadLon();
if (overEquator()) {
// get top center (for latitude)
inverse(width / 2, 0, tmp);
lat = tmp.getRadLat();
} else {
// get left top corner (for latitude)
inverse(0, 0, tmp);
lat = tmp.getRadLat();
}
}
tmp.setLatLon(lat, lon, true);
// Debug.output("ul="+tmp);
return tmp;
}
