Fanout Line Reused Nonadjacent Leg

Gallery / Fan-out and Fan-in

A four-leg fan-out reuses the same line on two non-adjacent legs, with two distinct lines on the legs between them. Regression fixture for #1529: fan-port lane assignment gave the repeated line separate inner and outer lanes, leaving an empty interior lane that made the station's bundle non-contiguous and aborted rendering.

Mermaid source

examples/topologies/fanout_line_reused_nonadjacent_leg.mmd

graph LR
%%metro line: l0 | L0 | #e41a1c
%%metro line: l1 | L1 | #377eb8
%%metro line: l2 | L2 | #4daf4a
%%metro line: l3 | L3 | #984ea3
%%metro line: l4 | L4 | #ff7f00
%%metro line: l5 | L5 | #a65628
    subgraph s0 [Sec 0]
        n0_0[N0.0]
        n0_1[N0.1]
    end
    subgraph s1 [Sec 1]
        n1_0[N1.0]
        n1_1[N1.1]
        n1_2[N1.2]
        n1_3[N1.3]
    end
    subgraph s2 [Sec 2]
        n2_0[N2.0]
        n2_1[N2.1]
        n2_2[N2.2]
    end
    n0_1 -->|l4| n1_0
    n0_1 -->|l1| n1_1
    n0_1 -->|l2| n1_2
    n0_1 -->|l4| n1_3
    n1_3 -->|l2| n2_0
    n1_1 -->|l1| n2_1
    n1_0 -->|l0| n2_2

CLI command

nf-metro render examples/topologies/fanout_line_reused_nonadjacent_leg.mmd -o fanout_line_reused_nonadjacent_leg.svg

Rendered map