digraph { rankdir=LR

subgraph cluster_back { label="Back" style=bold color=grey

//cam01 [label="DV cam" style=dotted]
mic0 [label="Microphone" style=dotted]
cam1 [label="Webcam"]
cam2 [label="Webcam"]
cam3 [label="Webcam"]
cam4 [label="Webcam"]
cam5 [label="Webcam"]
cam6 [label="Webcam"]
cam7 [label="Webcam"]
cam8 [label="Webcam"]
pc1 [shape=box label="Auto mixer + raw streaming\nMicro-PC"]
pc2 [shape=box label="Auto mixer + raw streaming\nMicro-PC"]
pc3 [shape=box label="Auto mixer + raw streaming\nMicro-PC"]
pc4 [shape=box label="Raw streaming\nMicro-PC"]
mon1 [shape=hexagon label="Auto-mix display\nMonitor"]
mon2 [shape=hexagon label="Auto-mix display\nMonitor"]
mon3 [shape=hexagon label="Auto-mix display\nMonitor"]
mon00 [shape=hexagon label="Simple display\nMonitor"]
mon01 [shape=hexagon label="Live-mix display\nMonitor"]

pc1 -> mon1 [label="HDMI" fontsize=9]
pc2 -> mon2 [label="HDMI" fontsize=9]
pc3 -> mon3 [label="HDMI" fontsize=9]
cam1 -> pc1 [label="USB" fontsize=9]
cam2 -> pc1 [label="USB" fontsize=9]
cam3 -> pc2 [label="USB" fontsize=9]
cam4 -> pc2 [label="USB" fontsize=9]
cam5 -> pc3 [label="USB" fontsize=9]
cam6 -> pc3 [label="USB" fontsize=9]
cam7 -> pc4 [label="USB" fontsize=9]
cam8 -> pc4 [label="USB" fontsize=9]

{rank=max; mon00 mon01 mon1 mon2 mon3}
//{rank=min; mic0 cam01 cam1 cam2 cam3 cam4}
{rank=min; mic0 cam1 cam2 cam3 cam4}
}

subgraph cluster_top { label="Roof" style=bold color=grey

cam00 [label="Outdoor cam" style=dotted]
}

subgraph cluster_front { label="Front" style=bold color=grey

mon02 [shape=hexagon label="Video mixer console\nMonitor + keyboard"]
//pc22 [shape=box label="Video mixer console\nLaptop" style=dotted]
amix [shape=box label="Audio mixer console" style=dotted]
}

vid0 [label="Video recording\nDocument" style=dotted]
pc0 [shape=box label="Live mixer\nPC"]
sw0 [shape=box label="Switch"]
pc10 [shape=box label="Compressed streaming\nPC"]
pc80 [shape=box label="Website"]
pub1 [shape=hexagon label="Web browser"]

cam00 -> mon00 [style=dotted constraint=false]
mic0 -> amix [style=dotted]
amix -> pc0 [label="Phono" fontsize=9 style=dotted constraint=false]
vid0 -> pc0 [label="Disk" style=dotted fontsize=9]
pc0 -> mon01 [label="DVI" fontsize=9]
pc0 -> mon02 [label="VGA + PS/2" fontsize=9]
pc10 -> pc80 [label="Cellular net" fontsize=9]
pc80 -> pub1 [label="Internet" fontsize=9]
{pc1 pc2 pc3 pc4 pc0 pc10} -> sw0 [taillabel="Ethernet" fontsize=9 dir=none constraint=false]
//sw0 -> pc22 [label="Ethernet" fontsize=9 dir=both style=dotted constraint=false]
//cam01 -> pc0 [label="firewire" fontsize=9 style=dotted constraint=false]

{rank=same; pc0 pc10 pc80 sw0}
}