/**
* return the z-coordinate of the barycenter
*
* @return z
*/
public float getZ() {
if (changed) {
compute();
}
return radiusOfGroup.getZ();
}
/** @return return the averageRadius. */
public float getAverageRadius() {
if (changed) {
compute();
}
return radiusOfGroup.getAverageRadius();
}
