* wants layed out. Sets the internal nodes' positions and sizes from the
* external entities.
*/
private InternalNode[] createInternalNodes(LayoutEntity[] nodes) {
InternalNode[] internalNodes = new InternalNode[nodes.length];
BasicEntityConstraint basicEntityConstraint = new BasicEntityConstraint();
for (int i = 0; i < nodes.length; i++) {
basicEntityConstraint.clear();
LayoutEntity externalNode = nodes[i];
InternalNode internalNode = new InternalNode(externalNode);
externalNode.populateLayoutConstraint(basicEntityConstraint);
internalNode.setInternalLocation(externalNode.getXInLayout(), externalNode.getYInLayout());
internalNodes[i] = internalNode;