我创建了一个java程序,该程序以1个顶点开始,从那里它每个周期添加一个顶点和2个边。它采用静态布局随机化顶点位置JUNG
Layout<Number, Number> staticLayout = new StaticLayout<Number, Number>(g, layout);
vv = new VisualizationViewer<Number, Number>(staticLayout, new Dimension(550, 550));
这是要健全非常联合国的技术,而图形只是看起来不足够的随机,基本上是什么意思呢,就是每次被运行时,他们似乎总是在图的边缘周围聚集很多,而很少到达中心附近的任何地方。我的程序通常使用100个生成的顶点,我将在中心结束半打,其他所有结点都在边缘。
下面是我刚刚创建的一个随机示例。
也许如果有人能确认这实际上是随机的,或者如果没有办法解决这个问题,或者如果我设置了错误的东西。因为我希望节点尽可能随机。
任何帮助,将不胜感激。 感谢
下面是相关代码的小程序。涉及其成立。
public class AnimatingAddNodeDemo extends JApplet {
//create a graph
Graph<Number, Number> ig = Graphs.synchronizedUndirectedGraph(new UndirectedSparseMultigraph<Number, Number>());
ObservableGraph<Number, Number> og = new ObservableGraph<Number, Number>(ig);
og.addGraphEventListener(new GraphEventListener<Number, Number>() {
public void handleGraphEvent(GraphEvent<Number, Number> evt) {
//System.err.println("got " + evt);
}
});
this.g = og;
//create a graphdraw
layout = new FRLayout<Number, Number>(g);
layout.setSize(new Dimension(600, 600));
setSize(700, 700);
Relaxer relaxer = new VisRunner((IterativeContext) layout);
relaxer.stop();
relaxer.prerelax();
Layout<Number, Number> staticLayout = new StaticLayout<Number, Number>(g, layout);
vv = new VisualizationViewer<Number, Number>(staticLayout, new Dimension(550, 550));
JRootPane rp = this.getRootPane();
rp.putClientProperty("defeatSystemEventQueueCheck", Boolean.TRUE);
getContentPane().setLayout(new BorderLayout());
}
Integer v_prev = null;
public void process() {
vv.getRenderContext().getPickedVertexState().clear();
vv.getRenderContext().getPickedEdgeState().clear();
try {
if (g.getVertexCount() < 100) {
//add a vertex
Integer v1 = nodeCount;
g.addVertex(v1);
nodeCount++;
System.out.println("adding vertex " + v1);
vv.getRenderContext().getPickedVertexState().pick(v1, true);
j.setText(myText);
// wire it to some edges
if (v_prev != null) {
Integer edge = edgeCount;
//vv.getRenderContext().getPickedEdgeState().pick(edge, true);
// let's connect to a random vertex, too!
int rand = (int) (Math.random() * (edgeCount-1)); // because there is a 0 node
while (v1.equals(rand)) {
System.out.println("avoided connecting to myself");
rand = (int) (Math.random() * (edgeCount-1)); // because there is a 0 node
}
edgeCount++;
g.addEdge(edge, rand, v1); //add an edge called var1, between the nodes var2 and var3
vv.getRenderContext().getPickedEdgeState().pick(edge, true);
System.out.println("Adding edge " + edge + " between " + rand + " & " + v1 + "()");
}
v_prev = v1;
layout.initialize();
Relaxer relaxer = new VisRunner((IterativeContext) layout);
relaxer.stop();
relaxer.prerelax();
vv.getRenderContext().getMultiLayerTransformer().setToIdentity();
vv.repaint();
} else {
done = true;
}
} catch (Exception e) {
System.out.println(e);
}
}
public static void main(String[] args) {
AnimatingAddNodeDemo and = new AnimatingAddNodeDemo();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(and);
and.init();
and.start();
frame.pack();
//frame.setVisible(true);
}
}
我走在黑暗中拍摄,但看起来你是通过你的'StaticLayout'的'FRLayout'(Fruchterman-莱因戈尔德)。您的屏幕截图是大多数FRLayout尺寸太小时的样子。节点靠在布局的墙上。我猜JUNG在'StaticLayout'类中使用'FRLayout'作为变换器。 – sdasdadas