PointNode node1 = new PointNode();
node1.setPos(0, 0, 0);
node1.setDrawMode(SHAPE_DRAW_2D3D);
node1.setFillColor(black);
node1.setOwner(this);
node1.setRadius(10);
node1.setVisible(true);
presentation.add(node1);
PointNode node2 = new PointNode();
node2.setPos(100, 0, 0);
node2.setDrawMode(SHAPE_DRAW_2D3D);
node2.setFillColor(black);
node2.setOwner(this);
node2.setRadius(10);
node2.setVisible(true);
presentation.add(node2);
Path path1 = new Path();
path1.setBidirectional(true);
path1.setDrawingType(PATH_LINE);
path1.setDrawMode(SHAPE_DRAW_2D3D);
path1.setLineColor(black);
path1.setLineWidth(10);
path1.setOwner(this);
path1.setSource(node1);
path1.setTarget(node2);
path1.setVisible(true);
path1.toPath3D();
path1.initialize();
presentation.add(path1);
Network net1 = new Network(this,"aa");
net1.setDrawMode(SHAPE_DRAW_2D3D);
net1.setVisible(true);
net1.addAll(node1, node2, path1);

// create rectangular node
rn = new RectangularNode();
rn.setPos(300.0, 350.0, 0.0);
rn.setSize(100.0, 90.0);
rn.addAttractor(new Attractor(25.0, 25.0, 4.7));
// create point node
pn = new PointNode();
pn.setRadius( 5 );
pn.setLineColor( dodgerBlue );
pn.setPos(50.0, 300.0);
// create path between nodes
Path path = new Path();
path.setBidirectional(true);
path.addSegment(new MarkupSegmentLine(50.0, 300.0, 0.0, 350.0, 300.0, 0.0));
path.addSegment(new MarkupSegmentLine(350.0, 300.0, 0.0, 350.0, 350.0, 0.0));
path.setTarget(rn);
path.setSource(pn);
// create network with path and nodes
n = new Network(this, "myNetwork");
n.addAll(rn, pn, path);
// create level with the network and initialize the level
Level level = new Level(this, "myLevel", SHAPE_DRAW_2D3D, 0);
level.add(n);
level.initialize(); // cannot be changed after initialization!
return level;