@Override
    public String toString() {
        String result = String.format(
                "input(%.3f, %.3f) exp(%.3f, %.3f, %.3f) scale(%.3f, %.3f, %.3f)",
                lowerLimit, upperLimit,
                redExponent, greenExponent, blueExponent,
                redScale, greenScale, blueScale);
        return result;
    }
Represent this Filter as a String.

@return a descriptive string of text (not null)
jme3-effects/src/main/java/com/jme3/post/filters/ContrastAdjustmentFilter.java