public void project() {
        srcPotentialIndex = 0;
        trgPotentialIndex = 0;
        recurse(0, 0);
        BayesAbsorption.normalize(trgPotentials);

    }
@Test
    public void testProjection3() {
        // Projects from node1 into sep. A, B and C are in node1. A and C are in the sep.
        // this tests a non separator var, in the middle of the vars
        BayesVariable a = new BayesVariable<String>( "A", 0, new String[] {"A1", "A2"},  new double[][] {{0.1, 0.2}});
        BayesVariable b = new BayesVariable<String>( "B", 1, new String[] {"B1", "B2"},  new double[][] {{0.1, 0.2}});
        BayesVariable c = new BayesVariable<String>( "C", 2, new String[] {"C1", "C2"},  new double[][] {{0.1, 0.2}});


        Graph<BayesVariable> graph = new BayesNetwork();
        GraphNode x0 = addNode(graph);
        GraphNode x1 = addNode(graph);
        GraphNode x2 = addNode(graph);
        GraphNode x3 = addNode(graph);


        x0.setContent( a );
        x1.setContent( b );
        x2.setContent( c );

        JunctionTreeClique node1 = new JunctionTreeClique(0, graph, bitSet("0111") );
        JunctionTreeClique node2 = new JunctionTreeClique(1, graph, bitSet("0101")  );
        SeparatorState sep = new JunctionTreeSeparator(0, node1, node2, bitSet("0101"), graph).createState();

        double v = 0.1;
        for ( int i = 0; i < node1.getPotentials().length; i++ ) {
            node1.getPotentials()[i] = v;
            v = scaleDouble(3, v + 0.1 );
        }

        BayesVariable[] vars = new BayesVariable[] {a, b, c};

        BayesVariable[] sepVars = new BayesVariable[] { a, c };
        int[] sepVarPos = PotentialMultiplier.createSubsetVarPos(vars, sepVars);

        int sepVarNumberOfStates = PotentialMultiplier.createNumberOfStates(sepVars);
        int[] sepVarMultipliers = PotentialMultiplier.createIndexMultipliers(sepVars, sepVarNumberOfStates);

        double[] projectedSepPotentials = new double[ sep.getPotentials().length];
        BayesProjection p = new BayesProjection(vars, node1.getPotentials(), sepVarPos, sepVarMultipliers, projectedSepPotentials);
        p.project();

        // remember it's been normalized, from 0.4, 0.6, 1.2, 1.4
        assertArray(new double[]{0.111, 0.167, 0.333, 0.389}, scaleDouble(3, projectedSepPotentials));
    }