@Override
    public String toString() {
        return "DistanceLodCalculator "+size+"*"+lodMultiplier;
    }
Calculates the LOD of the terrain based on its distance from the
cameras. Taking the minimum distance from all cameras.

@author bowens
jme3-terrain/src/main/java/com/jme3/terrain/geomipmap/lodcalc/DistanceLodCalculator.java