Jose Fonseca authored on 13/02/2016 23:53:31
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+/* |
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+ * The transitive 5-net, also known as Petersen's graph, |
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+ * can be used to test the "stability points" of the layout |
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+ * algorithm. |
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+ * |
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+ * The "ideal" layout is achieved for certain random seed |
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+ * values when len=1.5. For len=2.5 or above, the layout |
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+ * is stable. Sometimes, the graph is rendered "inside-out". |
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+ */ |
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+graph "Petersen" {
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+ node [ |
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+ fontname = "Arial" |
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+ label = "\N" |
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+ shape = "circle" |
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+ width = "0.400000" |
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+ height = "0.400000" |
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+ color = "black" |
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+ ] |
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+ edge [ |
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+ color = "black" |
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+ ] |
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+ /* Outer wheel. The len= is what makes it outer */ |
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+ "0" -- "1" -- "2" -- "3" -- "4" -- "0" [ |
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+ color = "blue" |
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+ len = 2.6 |
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+ ] |
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+ "0" -- "5" [ |
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+ color = "red" |
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+ weight = "5" |
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+ ] |
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+ "1" -- "6" [ |
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+ color = "red" |
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+ weight = "5" |
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+ ] |
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+ "2" -- "7" [ |
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+ color = "red" |
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+ weight = "5" |
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+ ] |
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+ "3" -- "8" [ |
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+ color = "red" |
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+ weight = "5" |
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+ ] |
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+ "4" -- "9" [ |
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+ color = "red" |
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+ weight = "5" |
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+ ] |
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+ "5" -- "7" -- "9" -- "6" -- "8" -- "5"; |
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+} |
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