List<Node> nodes = new ArrayList<Node>(nodevectors.size());
Interpolation interpol = new KochanekBartelsInterpolation();
for (Vector nodevector : nodevectors) {
Node n = new Node(nodevector);
n.setTension(tension);
n.setBias(bias);
n.setContinuity(continuity);
nodes.add(n);
}
interpol.setNodes(nodes);
double splinelength = interpol.arcLength(0, 1);