public List<Float> getKnots(int dim) {
        return knots[dim];
    }
This method returns the knots for specified dimension (U knots - value: '0',
V knots - value: '1').
@param dim an integer specifying if the U or V knots are required
@return an array of knots
jme3-core/src/main/java/com/jme3/scene/shape/Surface.java