Hi,
I’m extracting Lat/long co-ordinates from EXIF data in jpg photographs and mapping the locations to a sphere to simulate the globe - I have been through several iterations of code (and useful examples) but have an error that I cant unravel - given the code example i pass lat/long and globe radius and return x,y,z for the relevant point on the globe surface - for certain locations (Hong Kong and Japan) the position is correct but for europe the positions appear 'inverted ’ ie 180 degrees opposite where they should be - eg UK locations are near New Zealand.
here’s the routine - can anyone spot what I’m missing _ (and probably looking straight at ) or suggest alternatives-
ofVec3f ofApp::sphericalToCartesian( float lat, float lon, float radius ){
ofVec3f result;
lat *= -1; // inverse latitude.
lat += 90; // latitude offset to match geometry of the sphere.
lon *= -1; // inverse longitude.
lon -= 90; // longitude offset to match geometry of the sphere.
lat *= DEG_TO_RAD;
lon *= DEG_TO_RAD;
result.x = radius * sin( lat ) * cos( lon );
result.y = radius * sin( lat ) * sin( lon );
result.z = radius * cos( lat );
return result;
}
