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关于tikz结点定位的问题
就是在感受器.west往上偏移一点 -- 神经网络.east 往上偏移一点的箭头有什么简单点的方法定位吗。自己手动尝试定位真的优点笨重。
用这种方法draw[-Stealth,above of = 0.1cm] (ganshou.east) -- (shenjing.west)还是自动从感受器的东到神经网络的西去。。
看了看手册，positioning是对node做偏移的。。
```tex
\documentclass[UTF8,fontset = macnew]{ctexart}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{positioning}
\begin{document}
\begin{tikzpicture}
\node (ciji) [] at (-0.5,0) {刺激};
\node (ganshouqi)[draw,minimum height = 0.8cm,thick] at (1.5,0) {感受器};
\node (shenjing) [draw,minimum height = 0.8cm,thick] at (4,0) {神经网络};
\node (xiaoying) [draw,minimum height = 0.8cm,thick] at (6.5,0) {效应器};
\node (xiangying) [minimum height = 0.8cm,thick] at (8.5,0) {响应};
\draw [-Stealth] (ciji.east) -- (ganshouqi.west);
\draw [-Stealth] (2.172,0.2) -- (3.146,0.2);
\draw [-Stealth] (3.146,-0.2) -- (2.172,-0.2);
\draw [-Stealth] (4.87,0.2) -- (5.83,0.2);
\draw [-Stealth] (5.83,-0.2) -- (4.87,-0.2);
\draw [-Stealth] (xiaoying.east) -- (xiangying.west);
\end{tikzpicture}
\end{document}
```
2 回答
1
使用`tikzlibrary`: `calc`
见`pgfmanual`: sec 13.5
```tex
\documentclass[tikz, border=5mm]{standalone}
\usepackage{xeCJK}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}
\node (ciji) [] at (-0.5,0) {刺激};
\node (ganshouqi)[draw,minimum height = 0.8cm,thick] at (1.5,0) {感受器};
\node (shenjing) [draw,minimum height = 0.8cm,thick] at (4,0) {神经网络};
\node (xiaoying) [draw,minimum height = 0.8cm,thick] at (6.5,0) {效应器};
\node (xiangying) [minimum height = 0.8cm,thick] at (8.5,0) {响应};
\draw [-Stealth] (ciji.east) -- (ganshouqi.west);
\draw [-Stealth] ($(ganshouqi.east) + (0, 2mm)$) -- ($(shenjing.west) + (0,
2mm)$);
\draw [-Stealth] ($(shenjing.west) + (0, -2mm)$) -- ($(ganshouqi.east) + (0,
-2mm)$);
\draw [-Stealth] (xiaoying.east) -- (xiangying.west);
\end{tikzpicture}
\end{document}
```
-
感谢～～～ – neverland 2020-04-14 06:55 回复
0
如果用相对位置计算，是不是更方便一些呢，将尺寸比较定义成一个宏命令，修改会更方便一些。
```tex
\documentclass[tikz, border=5mm]{standalone}
\usepackage{xeCJK}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\usetikzlibrary{positioning}
\usetikzlibrary{calc}
\begin{document}
\begin{tikzpicture}
\def\ratio{0.4} % 定义位置比例宏
\node (ciji) [] at (-0.5,0) {刺激};
\node (ganshouqi)[draw,minimum height = 0.8cm,thick] at (1.5,0) {感受器};
\node (shenjing) [draw,minimum height = 0.8cm,thick] at (4,0) {神经网络};
\node (xiaoying) [draw,minimum height = 0.8cm,thick] at (6.5,0) {效应器};
\node (xiangying) [minimum height = 0.8cm,thick] at (8.5,0) {响应};
\draw [-Stealth] (ciji.east) -- (ganshouqi.west);
\draw [-Stealth] ($(ganshouqi.east)!\ratio!(ganshouqi.north east)$) -- ($(shenjing.west)!\ratio! (shenjing.north west)$);
\draw [-Stealth] ($(shenjing.west)!\ratio!(shenjing.south west)$) -- ($(ganshouqi.east)!\ratio!(ganshouqi.south east)$);
\draw [-Stealth] (xiaoying.east) -- (xiangying.west);
\end{tikzpicture}
\end{document}
```
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