粒子运动图

Question

我希望能够为微积分或物理课程创建如下所示的粒子运动图；

这是我发布问题时的情况：

    \documentclass[12pt]{article}
enter code here
    \usepackage{mathptmx} % rm & math
    \usepackage[scaled=0.90]{helvet} % ss
    \usepackage{courier} % tt
    \normalfont 
    \usepackage[T1]{fontenc}
    \usepackage{amsmath}
    \usepackage{graphicx}
    \usepackage{amssymb}
    \usepackage{multicol}
    \usepackage{graphpap}
    \usepackage[normalem]{ulem}
    \usepackage{pgfplots}
    \pgfplotsset{compat=1.8}
    \DeclareGraphicsRule{.tif}{png}{.png}{`convert #1 `dirname #1`/`basename #1 .tif`.png}

    \begin{document}

    \begin{tikzpicture}
      % an arrow
      \draw[-latex][line width=.3mm] (0,0) -- (6,0);
      \node at (5.9, -0.3) {$s$};
      \node at (1,0) {\circle*{4.0}};
      \node at (1, -0.5) {$t = 0$};
      \node at (1, -1.0) {$s = 0$};
      \node at (5,0) {\circle*{4.0}};
      \node at (5, -0.5) {$t = 1$};
      \node at (5, -1.0) {$s = 4$};
    \end{tikzpicture}

    \end{document}

Answer 1

欢迎来到 TeX.SE！本网站旨在帮助您解决代码问题，而不是将屏幕截图转换为 LaTeX 代码。对于新手，有时会有例外。

\documentclass[tikz,border=3.14mm]{standalone}
\usetikzlibrary{ arrows.meta,bending,decorations.markings,positioning}
\begin{document}
% from https://tex.stackexchange.com/a/430239/121799
\tikzset{% inspired by https://tex.stackexchange.com/a/316050/121799
    arc arrow/.style args={%
    to pos #1 with length #2}{
    decoration={
        markings,
         mark=at position 0 with {\pgfextra{%
         \pgfmathsetmacro{\tmpArrowTime}{#2/(\pgfdecoratedpathlength)}
         \xdef\tmpArrowTime{\tmpArrowTime}}},
        mark=at position {#1-\tmpArrowTime} with {\coordinate(@1);},
        mark=at position {#1-2*\tmpArrowTime/3} with {\coordinate(@2);},
        mark=at position {#1-\tmpArrowTime/3} with {\coordinate(@3);},
        mark=at position {#1} with {\coordinate(@4);
        \draw[-{Stealth[length=#2,bend]}]       
        (@1) .. controls (@2) and (@3) .. (@4);},
        },
     postaction=decorate,
     },
fixed arc arrow/.style={arc arrow=to pos #1 with length 2mm}     
}

\begin{tikzpicture}[bullet/.style={circle,inner sep=1.5pt,fill}]
 \pgfmathsetmacro{\rad}{0.3} % arc radius in cm
 \draw[-{Stealth[length=4pt]}] (-1,0) -- (5,0) node[bullet,pos=1/6] (O){} 
 node[bullet,pos=5/6] (X){} node[pos=1,below]{$s$};
 \node[below=0pt of O,align=center]{$t=0$\\ $s=0$};
 \node[below=0pt of X,align=center]{$t=1$\\ $s=4$};
 \draw[cyan,fixed arc arrow/.list={0.15,0.25,...,0.951}] 
  (0,0.5) node[bullet]{} to ++(4-\rad,0) 
  arc(-90:90:\rad) node[midway,bullet]{} to ++(-4+2*\rad,0)
  arc(-90:-270:\rad) node[midway,bullet] (b2){} to ++(5-\rad,0);
 \node[above=\rad*1cm of b2,align=center]{$t=3$\\ $s=0$};
\end{tikzpicture}
\end{document}