/** {@inheritDoc} */
@Override
protected void determineLabelPositions(DrawContext dc) {
Position center = this.getReferencePosition();
if (center == null) return;
// Position the labels along a line radiating out from the center of the circle. The angle (60
// degrees) is
// chosen to match the graphic template defined by MIL-STD-2525C, pg. 613.
double globeRadius = dc.getGlobe().getRadius();
Angle labelAngle = this.getLabelAngle();
int i = 0;
for (SurfaceCircle ring : this.rings) {
double radius = ring.getRadius();
LatLon ll = LatLon.greatCircleEndPosition(center, labelAngle.radians, radius / globeRadius);
this.labels.get(i).setPosition(new Position(ll, 0));
i += 1;
}
}
