Same Destination Vertical Convergence

Gallery / Fan-out and Fan-in

The reproducer published in #1764. Two same-direction routes converge on one side-entry destination across several rows, their final approaches settling into adjacent lanes while the outgoing diagonal's label keeps its clearance. The same map also carries the #1746 settlement work: a planned multi-row riser crosses the natural approach corridor, so settlement atomically refuses the natural off-slot proposal that would cross the planned exempt riser and retains the existing geometry.

Mermaid source

%%metro title: Same-destination vertical convergence
%%metro line: lower | Lower route | #8453d7
%%metro line: feeder | Feeder | #6ef362
%%metro line: return | Return | #a66d13
%%metro line: scaffold | Scaffold | #dde6c4
%%metro line: obstacle | Obstacle | #156075
%%metro line: obstacle_feed | Obstacle feed | #4cda26
%%metro line: upper | Upper route | #3779b1
%%metro grid: s0 | 0,0
%%metro grid: s1 | 1,0
%%metro grid: s2 | 1,1
%%metro grid: s3 | 1,2
%%metro grid: target | 2,0
%%metro grid: s5 | 2,1
%%metro grid: s7 | 1,3
%%metro grid: s8 | 0,3

graph LR
    subgraph s0 [Source]
        n0_0[Source input]
        n0_1[Source split]
        n0_0 -->|scaffold| n0_1
    end

    subgraph s1 [Upper obstacle]
        n1_0[Obstacle input]
        n1_1[Obstacle middle]
        n1_0 -->|obstacle| n1_1
        n1_2[Obstacle output]
        n1_1 -->|upper| n1_2
    end

    subgraph s2 [Middle feeder]
        n2_0[Middle input]
        n2_1[Middle step]
        n2_0 -->|scaffold| n2_1
        n2_2[Middle output]
        n2_1 -->|feeder| n2_2
    end

    subgraph s3 [Lower feeder]
        n3_0[Lower input]
        n3_1[Lower step]
        n3_0 -->|lower| n3_1
        n3_2[Lower output]
        n3_1 -->|upper| n3_2
    end

    subgraph target [Shared target]
        %%metro entry: left | upper, lower
        target_in[Target input]
        target_out[Target output]
        target_in -->|upper,lower| target_out
    end

    subgraph s7 [Lower sink]
        %%metro direction: RL
        n7_0[Sink input]
        n7_1[Sink middle]
        n7_0 -->|lower| n7_1
        n7_2[Sink step]
        n7_1 -->|return| n7_2
        n7_3[Sink output]
        n7_2 -->|scaffold| n7_3
    end

    subgraph s5 [Middle sink]
        n5_0[Middle sink input]
        n5_1[Middle sink step]
        n5_0 -->|scaffold| n5_1
        n5_2[Middle sink output]
        n5_1 -->|obstacle| n5_2
    end

    subgraph s8 [Return target]
        %%metro direction: RL
        n8_0[Return target input]
        n8_1[Return target output]
        n8_0 -->|return| n8_1
    end

    n0_1 -->|obstacle_feed| n1_0
    n0_1 -->|scaffold| n2_0
    n0_1 -->|scaffold| n3_0
    n0_1 -->|upper| target_in
    n0_1 -->|lower| n7_0
    n2_2 -->|upper| n7_0
    n2_2 -->|lower| n5_0
    n2_2 -->|scaffold| n5_0
    n5_2 -->|feeder| n7_0
    n7_3 -->|return| n8_0
    n7_3 -->|upper| n8_0
    n3_2 -->|lower| target_in

CLI command

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

Rendered map