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Junctions [message #1843442]

Thu, 29 July 2021 21:17

H S

Messages: 3
Registered: July 2021

Junior Member

There's very limited documentation on junctions so reaching out to the experts here to better understand the feature.

Here's a simple graph that I created -

{
  id: "root",
  layoutOptions: { 'algorithm': 'layered' },
  children: [
    {
      id: "n1",
      width: 100,
      height: 50,
      layoutOptions: {
        "portConstraints": "FIXED_SIDE"
      },
      ports: [
        {
          id: "n1_p1",
          width: 5,
          height: 2,
          layoutOptions: {
            "port.side": "WEST"
          }
        },
        {
          id: "n1_p2",
          width: 5,
          height: 2,
          layoutOptions: {
            "port.side": "EAST"
          }
        }
      ],
      children: [
        {
          id: "n2",
          width: 30,
          height: 20,
          ports: [
            {
              id: "n2_p1",
              width: 5,
              height: 2,
              layoutOptions: {
                "port.side": "WEST"
              }
            },
            {
              id: "n2_p2",
              width: 5,
              height: 2,
              layoutOptions: {
                "port.side": "EAST"
              }
            }
          ],
          layoutOptions: {
            "portConstraints": "FIXED_SIDE"
          }
        }
      ],
      edges: [
        { id: "e1", sources: [ "n2_p1" ], targets: [ "n1_p1" ] },
        { id: "e2", sources: [ "n2_p1" ], targets: [ "n1_p2" ] },
        { id: "e3", sources: [ "n2_p1" ], targets: [ "n2_p2" ] }
      ]
    },
  ],
}

All three edges, e1, e2, and e3 are originating from the same port. I see that there's a junction point for one of the edges (unclear whether its for e1 or e2 because of the overlap). I would have expected a junction point for edge e3 as well. Is this junction missing i.e. bug or am I misunderstanding the concept behind junctions?

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