public static float log(float value, float base) {
        return (float) (Math.log(value) / Math.log(base));
    }
Returns the logarithm of value with given base, calculated as log(value)/log(base),
so that pow(base, return)==value (contributed by vear)

@param value The value to log.
@param base Base of logarithm.
@return The logarithm of value with given base
jme3-core/src/main/java/com/jme3/math/FastMath.java