Java JUNG 图 : Some edges miss arrows

Question

我用 StaticLayout 制作了一个图表并更改了顶点的形状\颜色。我没有改变任何与边缘相关的东西。所有边都是有方向的，但有些边没有箭头!怎么会发生这种事？

图形可视化代码:

    Layout<Object, String> layout = new StaticLayout<Object, String>(graphProvider.graphFor(market),new MarketVertexLayoutTransformer(market,panel.getMarketGraphPane().getSize() )) ;
    layout.setSize(panel.getMarketGraphPane().getSize());
    VisualizationViewer<Object,String> graphPanel = new VisualizationViewer<Object,String>(layout);
    graphPanel.getRenderContext().setVertexShapeTransformer(new MarketVertexShapeTransformer());
    graphPanel.getRenderContext().setVertexFillPaintTransformer(new MarketVertexColorTransformer());
    panel.getMarketGraphPane().add(graphPanel, BorderLayout.CENTER);
    panel.getMarketGraphPane().revalidate();

图表是

graph = new DirectedSparseGraph<Object, String>();

边是这样创建的

   graph.addEdge(bundle.getGood()+"->"+transformation,bundle.getGood(),transformation);
   graph.addEdge(transformation+"->"+bundle.getGood(),transformation,bundle.getGood());

谢谢

Answer 1

箭头的放置是通过分割边缘直到远段包含在顶点形状中，然后向后移动一个来完成的。如果操作开始时远端点不在顶点形状内部，则应该抛出异常。您选择了正确的解决方案，即在将顶点形状平移到位之前将它们以原点为中心。汤姆·纳尔逊