用项目变化替换图形并在项目变化内重叠图像

Question

我需要用项目更改替换图形，我找到了如何做到这一点的方法。但我还需要在项目内重叠图像。这意味着图像应该在项目内重叠。随着项目的改变，应该显示一组新的图像，这些图像将相互重叠。我不知道该怎么做，因为我尝试插入代码，但这种方式不起作用。

\documentclass[aspectratio=169, 10pt]{beamer}
\def\Put(#1,#2)#3{\leavevmode\makebox(0,0){\put(#1,#2){#3}}}
\begin{document}

\begin{frame}{CFD}
  \begin{itemize}
    \item <1-> aaa
    \item <2-> bbb
    \item <3-> ccc
    \item <4-> ddd
  \end{itemize}

\includegraphics<1>[height=3cm]{air.png}\pause
\Put(10,50){\color{blue}\includegraphics<1>[height=3cm]{air1.jpg}}\pause
\Put(100,30){\color{red}\includegraphics<1>[height=3cm]{cabin2.png}}

\includegraphics<2>[height=3cm]{water.png}\pause

\end{frame}
\end{document}

Answer 1

可能有点过头了，但你可以使用 tikz：

\documentclass[aspectratio=169, 10pt]{beamer}

\usepackage{tikz}

% trick taken from https://topanswers.xyz/tex?q=1989
\tikzset{
    use page relative coordinates/.style={
        shift={(current page.south west)},
        x={(current page.south east)},
        y={(current page.north west)}
    },
}

\begin{document}

\begin{frame}[t]{CFD}

  \begin{itemize}
    \item <1-> aaa
    \item <4-> bbb
    \item <6-> ccc
    \item <7-> ddd
  \end{itemize}
  
  \begin{tikzpicture}[remember picture, overlay,use page relative coordinates]
    \node<1-3> at (0.7,0.7) {\includegraphics[height=3cm]{example-image-duck}};
    \node<2-3> at (0.8,0.8) {\includegraphics[height=3cm]{example-image-duck}};
    \node<3> at (0.75,0.6) {\includegraphics[height=3cm]{example-image-duck}};    
    \node<4-5> at (0.75,0.45) {\includegraphics[height=3cm]{example-image-a}};     
    \node<5> at (0.7,0.5) {\includegraphics[height=3cm]{example-image-a}};          
  \end{tikzpicture}

\end{frame}
\end{document}