在投影仪中将图像缩小到特定位置

Question

我想要：

• 显示全宽图像
• 单击后，从左上角开始将一张小尺寸图像放置在特定位置，并显示另一张全宽图​​像
• 重复此过程，直到显示所有四幅图像
• 以四幅图像组成的网格垂直和水平居中结束

我面临的问题是：

• 随着网格中第三幅图像（左下角）的显示，网格图像的位置会发生变化

我正在寻找的可能的改进是：

• 当我从全宽图像转到“概览”幻灯片时，过渡应该像将图像缩放到该位置一样
• 比我用过的代码更好吗？

以下是 MWE。

\documentclass[xcolor=dvipsnames,english,professionalfonts,smaller]{beamer}

\usetheme{Madrid}

\usepackage{graphicx}
\usepackage{parskip}
\usepackage{mwe}
\graphicspath{{.}{./image}}

\begin{document}

\setlength{\parskip}{\bigskipamount}

\begin{frame}{Title Text}

    \only <+ | handout:0> {\hfil \fbox{\includegraphics[width={\textwidth}]{example-image-16x9}}}
    \only <+ | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}} \\ \vspace{.09in}}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}} \hfill}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}}}
    \transduration<.>{.01}
    \only <+ | handout:0> {\fbox{\includegraphics[width={\textwidth}]{example-image-16x9}}}
    \only <+ | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \\ \vspace{.09in}}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}} \hfill}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}}}
    \transduration<.>{.01}
    \only <+ | handout:0> {\fbox{\includegraphics[width={\textwidth}]{example-image-16x9}}}
    \only <+ | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \\ \vspace{.09in}}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\phantom{\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}}}
    \transduration<.>{.01}
    \only <+ | handout:0> {\fbox{\includegraphics[width={\textwidth}]{example-image-16x9}}}
    \only <+ | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \\ \vspace{.09in}}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}} \hfill}
    \only <. | handout:0> {\fbox{\includegraphics[width={.470\textwidth}]{example-image-16x9}}}

\end{frame}

\end{document}

Answer 1

听起来像是您想要实现的补间动画（在动画缩放的帧之间插入）。 动画包可用于此类任务（需要 Adob​​e Reader）。

编辑：改进的动画时间线；tween.txt重新编译之前删除该文档。

\documentclass{beamer}

%animation timeline
\begin{filecontents*}{tween.txt}
*::0
 ::1
 ::2
 ::3x0 %keep small image
 ::7
 ::6
 ::5
*::4   %click to continue, 
 ::5
 ::6
 ::7x0
 ::11
 ::10
 ::9
*::8
 ::9
 ::10
 ::11x0
 ::15
 ::14
 ::13
*::12
 ::13
 ::14
*::15x0
 ::2
 ::1
\end{filecontents*}

\usepackage{mwe}
\usepackage{animate}

\newsavebox\imgx
\newsavebox\imga
\newsavebox\imgb
\newsavebox\imgc

\newlength\fullwidth
\setlength\fullwidth{0.9\textwidth}%

\savebox\imgx{\includegraphics[width=\fullwidth]{example-image}}%
\savebox\imga{\includegraphics[width=\fullwidth]{example-image-a}}%
\savebox\imgb{\includegraphics[width=\fullwidth]{example-image-b}}%
\savebox\imgc{\includegraphics[width=\fullwidth]{example-image-c}}%

\begin{document}

\begin{frame}{Animated zoom-out}\centering

    \begin{animateinline}[timeline=tween.txt,loop]{12} %animation frame rate
        %tween x
        \multiframe{4}{rScale=1+-0.17}{%
            \vbox to 0.75\fullwidth {%
              \hbox to \fullwidth {%
                \scalebox{\rScale}{\usebox\imgx}%
                \hss%
              }%
              \vss% 
            }%
        }%
        \newframe
        %tween a
        \multiframe{4}{rScale=1+-0.17}{%
            \vbox to 0.75\fullwidth {%
              \hbox to \fullwidth {%
                \hss%
                \scalebox{\rScale}{\usebox\imga}%
              }%
              \vss% 
            }%
        }%
        \newframe
        %tween b
        \multiframe{4}{rScale=1+-0.17}{%
            \vbox to 0.75\fullwidth {%
              \vss% 
              \hbox to \fullwidth {%
                \scalebox{\rScale}{\usebox\imgb}%
                \hss%
              }%
            }%
        }%
        \newframe
        %tween c
        \multiframe{4}{rScale=1+-0.17}{%
            \vbox to 0.75\fullwidth {%
              \vss% 
              \hbox to \fullwidth {%
                \hss%
                \scalebox{\rScale}{\usebox\imgc}%
              }%
            }%
        }%
    \end{animateinline}

\end{frame}

\end{document}