在beamer中经常使用tikz绘图,有时想把图形的绘制过程动态地展现出来,就更好了.
下面是个例子:
% Animated beamer frame for tikz
%Author:
%wu xuping
%Date:
%2013-04-02
% FileName:
%main.tex
% run:
% xelatex -shell-escape main
% xelatex -shell-escape main
%required:
% Acrobat Reader version > 6\documentclass{beamer}
\usepackage{verbatim}\usepackage{tikz}
\usepackage[autoplay,loop]{animate}\begin{document}\begin{frame}Animated beamer frame for tikz\begin{center}\begin{animateinline}[begin={\begin{tikzpicture}[blue,scale=1,line width=2pt]\useasboundingbox[draw] (0,0)rectangle(4,4);},end={\end{tikzpicture}}]{2}\draw[->](0,0)--(1,1);\newframe\draw[->](0,0)--(2,2);\newframe\draw[->](0,0)--(3,3);\newframe\draw[->](0,0)--(4,4);\end{animateinline}\end{center}\end{frame}\end{document}编译上面的例子,打开生成的pdf文件就可以发现tikz的动态绘图过程是如何实现的了.
如下图中的带箭头的线段是如何动态生成的?
再看一个tikz动画(或动态)绘制正弦函数的例子:
\documentclass{beamer}
\usepackage{verbatim}\usepackage{ctex}
\usepackage{tikz}
\usepackage{animate}\newcommand{\plotsin}[1]{%\draw[red] plot[domain=-3:#1](\x,{sin(\x r)});
}\begin{document}\begin{frame}绘制正弦函数的动画:\\\begin{animateinline}[autoplay,palindrome,begin={\begin{tikzpicture}[scale=1,line width=1.5pt]\draw[line width=0.5pt,step=0.5,dashed,use as bounding box] (-4,-1.5)grid(4,1.5);\draw[->] (-4,0)--(4,0) node[below left]{$x$};\draw[->] (0,-1.5)--(0,1.5)node[below left]{$y$}; },end={\end{tikzpicture}}]{4}\plotsin{0};\newframe\plotsin{1};\newframe\plotsin{1.5};\newframe\plotsin{2};\newframe\plotsin{2.5};\newframe\plotsin{3};\newframe\plotsin{3.5};\newframe\plotsin{4};\end{animateinline}\end{frame}\end{document}绘图如下所示:
设置两个参数画正弦函数,总共生成20帧画面,已每秒10帧的速度播放:
\documentclass{beamer}
\usepackage{verbatim}\usepackage{tikz}
\usepackage{calc}
\usepackage{animate}\newcommand{\plotsin}[2]{%\draw[red,<->] plot[domain=#1:#2]
(\x,{sin(\x r)});
}\begin{document}\begin{frame}
绘制正弦函数的动画:\\
\begin{animateinline}[autoplay,palindrome,begin={\begin{tikzpicture}[scale=1,line width=1.5pt]\draw[line width=0.5pt,step=0.5,dashed,use as bounding box] (-4,-1.5)grid(4,1.5);\draw[->,blue] (-4,0)--(4,0) node[below left]{$x$};\draw[->,blue] (0,-1.5)--(0,1.5)node[below left]{$y$}; },end={\end{tikzpicture}}]{10}\multiframe{20}{Rxa=-0.2+-0.2, Rxb=0.2+0.2}{%%Rxa=-0.2,-0.4,...,-4.0%Rxb=+0.2,+0.4,...,+4.0\plotsin{\Rxa}{\Rxb}%}%
\end{animateinline}\end{frame}\end{document}效果如下:
\usepackage[autoplay,loop]{animate} \begin{animateinline}<code text>\end{animateinline}