增加graphviz中边缘的分离

当目标形状是一个狭窄的矩形（H=0.5，W=0.05）时，我用点图和边/箭头（2+）创建了几个UML活动图。如果目标形状为正方形（H=0.5，W=0.5），则不会出现此问题

下面是一个减少点的示例：

digraph G {
graph [ ranksep = 0.5, rankdir = LR ]
A4 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rPreviewer", style = "rounded" ]
A5 [ shape = "rectangle", height = 0.5, width = 0.05, margin = "0,0", style = "filled", label = "" ]
A4 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
A6 [ shape = "diamond", height = 0.5, width = 0.5, margin = "0,0", label = "" ]
A6 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label = "[generate: false]" ]
A7 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rFile", style = "rounded" ]
A6 -> A7 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label = "[generate: true]" ]
A8 [ shape = "doublecircle", height = 0.3, width = 0.3, margin = "0,0", label = "" ]
A7 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
A5 -> A8 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
}

上面的文本在中生成下图

理想的输出如下

---

我发现了一个可以产生良好输出的调整，但需要大量处理、边缘计数和方向感知：

digraph G {
graph [ ranksep = 0.5, rankdir = LR ]
A4 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rPreviewer", style = "rounded" ]
A5 [ shape = "record", height = 0.5, width = 0.05, margin = "0,0", style = "filled", label = "<f0>|<f1>|<f2>", fillcolor="black" ]
A4 -> A5:f0:w [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
A6 [ shape = "diamond", height = 0.5, width = 0.5, margin = "0,0", label = "" ]
A6 -> A5:f1:w [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label = "[generate: false]" ]
A7 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rFile", style = "rounded" ]
A6 -> A7 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label = "[generate: true]" ]
A8 [ shape = "doublecircle", height = 0.3, width = 0.3, margin = "0,0", label = "" ]
A7 -> A5:f2:w [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
A5 -> A8 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
}

有向图G{
图[ranksep=0.5，rankdir=LR]
A4[shape=“record”，高度=0.5，字体大小=10，边距=0.20,0.05”，标签=“Output\to\rPreviewer”，style=“rounded”]
A5[shape=“record”，高度=0.5，宽度=0.05，边距=“0,0”，style=“filled”，label=“| |”，fillcolor=“black”]
A4->A5:f0:w[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10]
A6[形状=“菱形”，高度=0.5，宽度=0.5，边距=“0,0”，标签=“”]
A6->A5:f1:w[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10、label=“[generate:false]”
A7[shape=“record”，高度=0.5，字体大小=10，边距=“0.20,0.05”，标签=“Output\to\rFile”，style=“rounded”]
A6->A7[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10、label=“[generate:true]”
A8[形状=“双圆”，高度=0.3，宽度=0.3，边距=“0,0”，标签=“”]
A7->A5:f2:w[shape=“edge”，dir=“both”，style=“solid”，arrowtail=“none”，arrowhead=“vee”，labeldistance=1，fontsize=10]
A5->A8[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10]
}

这是输出：

---

我仍然想知道是否有一个更简单的解决方案。

您可以将所有边的输出端口指定为

east

，并获得一个很好的结果（至少在这种情况下）：

有向图G{
图[ranksep=0.5，rankdir=LR]
edge[tailport=e]#A5[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10]
A6[形状=“菱形”，高度=0.5，宽度=0.5，边距=“0,0”，标签=“”]
A6->A5[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10、label=“[generate:false]”
A7[shape=“record”，高度=0.5，字体大小=10，边距=“0.20,0.05”，标签=“Output\to\rFile”，style=“rounded”]
A6->A7[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10、label=“[generate:true]”
A8[形状=“双圆”，高度=0.3，宽度=0.3，边距=“0,0”，标签=“”]
A7->A5[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10]
A5->A8[shape=“edge”、dir=“both”、style=“solid”、arrowtail=“none”、arrowhead=“vee”、labeldistance=1、fontsize=10]
}

制作：

---

您可以尝试

A6->A5:nw

和

A7->A5:sw

。没有给出您想要的输出，但至少分离了边缘。@vaettchen，这听起来不像是一个通用的解决方案，对于提供的示例来说非常具体。如果有4条边就没用了。正确-我尝试了一个解决这个特定问题的方法。也许你编辑了你的帖子，说你正在寻找一个通用的解决方案来解决更多的边/箭头。嗨，Ohad，乍一看，这似乎是一个很好的选择，但对于提供的例子来说，这只是一个巧合。试着注释这行

A7->A5

，原始效果会重新出现。虽然这不是巧合，但你是对的，这不是所有情况下的解决方案。我接受我自己的答案，因为它产生了最好的结果，可以扩展到任何数量的边缘。

digraph G {
        graph [ ranksep = 0.5, rankdir = LR ]
        edge [tailport=e]                    # <----- added this line
        A4 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rPreviewer", style = "rounded" ]
        A5 [ shape = "rectangle", height = 0.5, width = 0.05, margin = "0,0", style = "filled", label = "" ]
        A4 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
        A6 [ shape = "diamond", height = 0.5, width = 0.5, margin = "0,0", label = "" ]
        A6 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label     = "[generate: false]" ]
        A7 [ shape = "record", height = 0.5, fontsize = 10, margin = "0.20,0.05", label = "Output\ to\rFile", style = "rounded" ]
        A6 -> A7 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10, label     = "[generate: true]" ]
        A8 [ shape = "doublecircle", height = 0.3, width = 0.3, margin = "0,0", label = "" ]
        A7 -> A5 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
        A5 -> A8 [ shape = "edge", dir = "both", style = "solid", arrowtail = "none", arrowhead = "vee", labeldistance = 1, fontsize = 10 ]
}