![在 `TikZ` 图中绘制 `(点 A) 至 [向右弯曲 = 30] (点 B)` 的一致性](https://linux22.com/image/405499/%E5%9C%A8%20%60TikZ%60%20%E5%9B%BE%E4%B8%AD%E7%BB%98%E5%88%B6%20%60(%E7%82%B9%20A)%20%E8%87%B3%20%5B%E5%90%91%E5%8F%B3%E5%BC%AF%E6%9B%B2%20%3D%2030%5D%20(%E7%82%B9%20B)%60%20%E7%9A%84%E4%B8%80%E8%87%B4%E6%80%A7.png)
在下TikZ图中，我描绘了一个扩展图——一系列简单图。类似于的命令
\draw[-latex] (Point A) to[bend right=30] (Point B)
指示某一步的扩展。当(Point A)正上方时，这看起来不错(Point B)- 箭头指向包含分数的节点的西北角。这些箭头中的第三个也是最后一个箭头结束于 的(Point B)东南方向(Point A)。（(Point B)在这种情况下， 包含以绿色排版的分数1/1。这是一个临时节点，排版是为了说明我的担忧。）在这种情况下，箭头看起来像是进入节点的西边。如何修改最后一个箭头，使箭头进入节点的东北角？
\documentclass{amsart}
\usepackage{amssymb}
\usepackage{mathtools,array}
\usepackage{tikz}
\usetikzlibrary{calc,intersections}
\begin{document}
\begin{tikzpicture}[nodes={inner sep=0, font=\scriptsize,
execute at begin node={\setlength\abovedisplayskip{0.75ex}%
\setlength\belowdisplayskip{0.5ex}%
\setlength\abovedisplayshortskip{0.75ex}%
\setlength\belowdisplayshortskip{0.5ex}}},
shorten/.style={shorten >=#1,shorten <=#1}]
%A sequence of graphs is drawn, starting with the vertex with the b-label b.
%Here is the blow-up of the vertex labeled b.
\draw[fill] (-4,0) circle (1.5pt);
\node[anchor=north] (label_for_Vertex_b) at ($(-4,0) +(0,-0.25)$){\textit{b}};
\node[anchor=south] at ($(-4,0) +(0,0.25)$){$\dfrac{0}{1}$};
%
%
\draw (-4,-3) -- (-2,-3);
\draw[fill] (-4,-3) circle (1.5pt);
\draw[fill] (-2,-3) circle (1.5pt);
%
\node[anchor=north] at ($(-4,-3) +(0,-0.25)$){\textit{b}};
\node[anchor=south] (label_for_Farey_Fraction_at_Vertex_b) at ($(-4,-3) +(0,0.25)$){$\dfrac{0}{1}$};
%
\node[anchor=north] (label_for_Vertex_b-1) at ($(-2,-3) +(0,-0.25)$){$b - 1$};
\node[anchor=south] at ($(-2,-3) +(0,0.25)$){$\dfrac{1}{1}$};
%
%
%An arrow is drawn to the next diagram.
\draw[-latex, line width=0.8pt, shorten=7.5pt] (label_for_Vertex_b) to[bend right=30] node[midway, left=1.5mm, align=center]
{Blow-up of\\vertex \textit{b}} (label_for_Farey_Fraction_at_Vertex_b);
%Here is the blow-up of the vertex labeled b-1.
\draw (-4,-6) -- (-2,-6) -- (0,-6);
\draw[fill] (-4,-6) circle (1.5pt);
\draw[fill] (-2,-6) circle (1.5pt);
\draw[fill] (0,-6) circle (1.5pt);
%
\node[anchor=north] at ($(-4,-6) +(0,-0.25)$){\textit{b}};
\node[anchor=south] at ($(-4,-6) +(0,0.25)$){$\dfrac{0}{1}$};
%
\node[anchor=north] at ($(-2,-6) +(0,-0.25)$){$b-1$};
\node[anchor=south] (label_for_Farey_Fraction_at_Vertex_b-1) at ($(-2,-6) +(0,0.25)$){$\dfrac{1}{1}$};
%
\node[anchor=north] at ($(0,-6) +(0,-0.25)$){$b-2$};
\node[anchor=south] at ($(0,-6) +(0,0.25)$){$\dfrac{2}{1}$};
%
%
\draw[-latex, line width=0.8pt, shorten=7.5pt] (label_for_Vertex_b-1) to[bend right=30] node[midway, left=1.5mm, align=center]
{Blow-up of\\vertex $b - 1$} (label_for_Farey_Fraction_at_Vertex_b-1);
%Here is the blow-up of the vertex labeled b-n.
\draw (-4,-9) -- (-2,-9) -- (0,-9) (2,-9) -- (5,-9);
\draw[fill] (-4,-9) circle (1.5pt);
\draw[fill] (-2,-9) circle (1.5pt);
\draw[fill] (0,-9) circle (1.5pt);
\node at (1,-9){$\ldots$};
\draw[fill] (2,-9) circle (1.5pt);
\draw[fill] (5,-9) circle (1.5pt);
%
\node[anchor=north] at ($(-4,-9) +(0,-0.25)$){\textit{b}};
\node[anchor=south] at ($(-4,-9) +(0,0.25)$){$\dfrac{0}{1}$};
%
\node[anchor=north] at ($(-2,-9) +(0,-0.25)$){$b-1$};
\node[anchor=south] at ($(-2,-9) +(0,0.25)$){$\dfrac{1}{1}$};
%
\node[anchor=north] at ($(0,-9) +(0,-0.25)$){$b-2$};
\node[anchor=south] at ($(0,-9) +(0,0.25)$){$\dfrac{2}{1}$};
%
\node[anchor=south, green] (label_for_phantom_Farey_Fraction_at_ellipses) at ($(1,-9) +(0,0.25)$){$\dfrac{1}{1}$};
%
\node[anchor=north] at ($(2,-9) +(0,-0.25)$){\textit{b-n}};
\node[anchor=south] at ($(2,-9) +(0,0.25)$){$\dfrac{n}{1}$};
%
\node[anchor=north] at ($(5,-9) +(0,-0.25)$){$b-(n+1)$};
\node[anchor=south] at ($(5,-9) +(0,0.25)$){$\dfrac{n+1}{1}$};
%
%
%
%
\draw[-latex, line width=0.8pt, shorten=7.5pt] (label_for_Vertex_b-2) to[bend right=30] node[midway, left=1.5mm, align=center]
{Blow-up of\\more vertices} (label_for_phantom_Farey_Fraction_at_ellipses);
%
%
%A "pin" is drawn between the midpoint of last two vertices and the label of the mediants of these vertices.
\draw[-latex, dashed, line width=0.8pt, shorten <=3mm, shorten >=1mm] ($(3.5,-9) +(60:2)$) -- (3.5,-9);
\path node[anchor=south, align=center, text width={width("future vertex")}]
at ($(3.5,-9) +(60:2)$){future mediant\\for vertex\[\dfrac{2n+1}{2}\]};
%
%A "pin" is drawn between the midpoint of the edge between the last two vertices and its label.
\coordinate (label_for_Edge) at ($(3.5,-9.5) +(0,-0.75)$);
\draw[draw=gray, line width=0.8pt, shorten <=1mm, shorten >=1mm] (3.5,-9) -- (label_for_Edge);
\node[anchor=north, align=center, inner sep=0, font=\scriptsize] at (label_for_Edge)
{$\begin{aligned} &\text{Present edge label of} \\[-1.5ex]
&\quad 2\bigl[(b-n)+(b-(n+1))\bigr] \\[-1.5ex]
&\qquad=2^{2}b-(2n+1)2
\end{aligned}$};
\draw[-latex, line width=0.8pt, shorten=7.5pt] (label_for_Vertex_b-1) to[bend right=30] node[midway, left=1.5mm, align=center]
{Blow-up of\\vertex $b - 1$} (label_for_Farey_Fraction_at_Vertex_b-1);
\draw[-latex, line width=0.8pt, shorten <=30pt, shorten >=7.5pt] (label_for_Edge.south) -- ($(label_for_Edge.south) +(0,-4)$);
%Here is the vertex placed at the broken edge.
\draw (-4,-15) -- (-2,-15) -- (0,-15) (2,-15) -- (5,-15);
\draw[fill] (-4,-15) circle (1.5pt);
\draw[fill] (-2,-15) circle (1.5pt);
\draw[fill] (0,-15) circle (1.5pt);
\node at (1,-15){$\ldots$};
\draw[fill] (2,-15) circle (1.5pt);
\draw[fill] ({(2+5)/2},-15) circle (1.5pt);
\draw[fill] (5,-15) circle (1.5pt);
%
\node[anchor=north] at ($(-4,-15) +(0,-0.25)$){\textit{b}};
\node[anchor=south] at ($(-4,-15) +(0,0.25)$){$\dfrac{0}{1}$};
%
\node[anchor=north] at ($(-2,-15) +(0,-0.25)$){$b-1$};
\node[anchor=south] at ($(-2,-15) +(0,0.25)$){$\dfrac{1}{1}$};
%
\node[anchor=north] at ($(0,-15) +(0,-0.25)$){$b-2$};
\node[anchor=south] at ($(0,-15) +(0,0.25)$){$\dfrac{2}{1}$};
%
\node[anchor=north] at ($(2,-15) +(0,-0.25)$){\textit{b-n}};
\node[anchor=south] at ($(2,-15) +(0,0.25)$){$\dfrac{n}{1}$};
%
\node[anchor=north] at ($(5,-15) +(0,-0.25)$){$b-(n+1)$};
\node[anchor=south] at ($(5,-15) +(0,0.25)$){$\dfrac{n+1}{1}$};
%
%A "pin" is drawn between the midpoint of the edge between the last two vertices and its label.
\draw[draw=gray, line width=0.8pt, shorten <=1mm, shorten >=1mm] ({(2+5)/2},-15) -- ({(2+5)/2},-16);
\node[anchor=north] at ({(2+5)/2},-16){$2^{2}b-(n+1)2$};
\node[anchor=south] at ($({(2+5)/2},-15) +(0,0.25)$){$\dfrac{2n+1}{2}$};
\end{tikzpicture}
\end{document}
答案1
像这样？
编辑：
下面的 MWE 基于我的 回答关于您之前的问题。它分为五行，由构建块（BBB）——节点dot——组成，结构如下：黑色实心圆圈，上面有名称的标签（其中分数为 0/1、1/1、2/1 等）和下面有名称的标签（其中索引为b、b-1等）。标签名称允许在相邻行的 BBB 之间绘制箭头：
dot/.style args = {#1/#2/#3/#4}{circle, draw, fill, minimum size=3pt,
inner sep=0pt, outer sep=0pt, anchor=center,
label={[name=#1]$#2$},
label={[name=#3]below:$#4$},
node contents={},
on chain},
定义的BBB通过chains库在每幅图像行中以链状连接。它们之间的距离由决定node distance=<vertical> and <horizontal>。
除了 BBB 之外，还定义了辅助元素，例如lbl引脚节点、标签样式、边缘引号和节点距离。最后定义了 BBB 之间的距离。这样可以很容易地以一致的方式更改 BBB 之间的距离。
所述结构提出的解决方案可以（当然在我看来）为您的图像提供一致、简洁和简短的代码，如果需要，可以简单地扩展新的图像元素。
完整的 MWE 是：
\documentclass{amsart}
\usepackage{tikz}
\usetikzlibrary{chains, % new
positioning, % new
shapes.multipart, % new
quotes} % new
\makeatletter
\tikzset{% for discontinuing of chain
off chain/.code={\def\tikz@lib@on@chain{}}%
}
\makeatother
\begin{document}
\begin{tikzpicture}[auto,
node distance = 22mm and 21mm, % new
start chain = going right, % new
every edge quotes/.style = {auto=right, font=\footnotesize,
align=center}, % new
every edge/.append style = {-latex, line width=0.8pt},
every label/.style = {inner sep= 2pt,font=\footnotesize},
dot/.style args = {#1/#2/#3/#4}{circle, draw, fill, minimum size=3pt,
inner sep=0pt, outer sep=0pt, anchor=center,
label={[name=#1]$#2$},
label={[name=#3]below:$#4$},
node contents={},
on chain}, %
lbl/.style args = {#1/#2}{rectangle split, rectangle split parts=2,
font=\footnotesize, inner sep=2pt,
node contents={#1\nodepart{two}#2},
}, % new
]
%%%% 1. row (is on the top of image), node name is n11
\node (n11) [dot=n11a/\frac{0}{1}/n11b/b];
%%%% 2. row, nodes names are n21, n22
\node (n21) [dot=n21a/\frac{0}{1}/n21b/b,
below=of n11];
\node (n22) [dot=n22a/\frac{1}{1}/n22b/b-];
\draw[-latex, line width=0.8pt]
(n11b) edge["blow up\\ of vertex $b$", bend left] (n21a);
\draw (n21) -- (n22);
%%%% 3. row, nodes names are n31, n32, ...
\node (n31) [dot=n31a/\frac{0}{1}/n31b/b,
below=of n21];
\node (n32) [dot=n32a/\frac{1}{1}/n32b/b-1];
\node (n33) [dot=n33a/\frac{2}{1}/n33b/b-2];
\draw (n22b) edge["blow up\\ of vertex $b$", bend left] (n32a);
\draw (n31) -- (n33);
%%%% 4. row, nodes names are n41, n42, ...
\node (n41) [dot=n41a/\frac{0}{1}/n41b/b,
below=of n31];
\node (n42) [dot=n42a/\frac{1}{1}/n42b/b-1];
\node (n43) [dot=n43a/\frac{2}{1}/n43b/b-2];
\node (n44) [dot=n45a/\frac{n}{1}/n45b/b-n];
\node (n45) [dot=n46a/\frac{n+1}{1}/n46b/b-(n+1)];
\path (n43) -- node[inner sep=0pt,
label={[name=n46,text=green!40!black]$\frac{3}{1}$}] {$\dots$} (n44);
\draw (n33b) edge["blow up\\ of vertex $b$",
bend left] (n43a);
\draw (n33b) edge[bend left] (n46.north);
\draw[thick] (n41) -- (n43) (n44) -- node (aux) {} (n45);
% "pin" above
\draw[<-, semithick, dashed] (aux) -- ++ (6mm,9mm)
node[above, lbl=Future vertex of/
$\dfrac{2n+1}{2}$];
% "pin" below
\draw[semithick] (aux) -- ++ (0,-9mm)
node (aux2) [below, lbl=Present edge label of/
{$\begin{gathered}
2\bigl[(b-n)+(b-(n+1))\bigr]\\
= 2^{2}b-(2n+1)2
\end{gathered}$}];
%%%% 5. row, nodes names are n51, n52, ...
\node (n51) [dot=n51a/\frac{0}{1}/n41b/b,
below=of n41 |- aux2];
\node (n52) [dot=n52a/\frac{1}{1}/n52b/b-1];
\node (n53) [dot=n53a/\frac{2}{1}/n53b/b-2];
\node (n54) [dot=n54a/\frac{n}{1}/n54b/b-n];
\node (n55) [dot=n55a/\frac{n+1}{1}/n55b/b-(n+1)];
%
\path (n53) -- node [anchor=center] {$\dots$} (n54);
\draw[thick] (n51) -- (n53)
(n54) -- (n55) node (n56) [pos=0.5, off chain,
dot=n56a/\frac{2n+1}{2}/n56b/ ];
\draw[semithick]
(aux2) -- (n56a) (n56) -- ++ (0,-9mm) node[below, lbl={$2^{2}b-(2n+1)2$/ }];
\end{tikzpicture}
\end{document}
请注意，我知道我提出的解决方案与您目前使用的解决方案完全不同。无论如何，（根据我的意见）值得测试它并寻找替代解决方案，它可能提供更简单的管理方法、更简单的更改或保持一致性。