static void gis_opengl_center_position(GisViewer *_opengl, gdouble lat, gdouble lon, gdouble elev)
{
static void gis_opengl_center_position(GisViewer *_opengl, gdouble lat, gdouble lon, gdouble elev)
{
glRotatef(lon, 0, 1, 0);
glRotatef(-lat, 1, 0, 0);
glTranslatef(0, 0, elev2rad(elev));
glRotatef(lon, 0, 1, 0);
glRotatef(-lat, 1, 0, 0);
glTranslatef(0, 0, elev2rad(elev));