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在背景图像上定义透明 \node

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在背景图像上定义透明 \node

我正在尝试在页面（实际上是标题页）中定义一个框，该框应该在页面背景（即图片.jpg）上显示为“透明”。

我使用的代码如下：

\documentclass[dvipsnames,a5paper,twoside,openright,italian,12pt]{memoir}   
\usepackage{defines}    
\author{The author}
\date{2016}
\title{The title}
\editor{The editor}
\begin{document}
\frontmatter 
\mytitle
\tableofcontents
\include{Preface}
\mainmatter
\include{Chapter01}
\include{Chapter02}   
\end{document}

在“defines.sty”中我定义了结构和命令：

\usepackage[utf8]{inputenc} 
\usepackage[italian]{babel}
\usepackage[T1]{fontenc} 
\usepackage{verse}
\usepackage{background}
\usepackage[object=vectorian]{pgfornament}
\usepackage{svg}
\usepackage{wallpaper}
\usepackage[osf]{libertine}

\usetikzlibrary{calc}

\backgroundsetup{
    contents={
        \if@mainmatter 
            \eachpageornament \thepage
        \else
            \ifnum\value {page}=1 
            \else 
                \eachpageornament \thepage
            \fi
        \fi
    },
    position=current page.north east,
    angle=0,%
    scale=1,%
    opacity=0.5%
}

\newcommand{\editor}[1]{\def\@editor{#1}}

\newcommand{\theeditor}{%
    \@editor
}

\newcommand{\eachpageornament}{
    \begin{tikzpicture}[remember picture, overlay, color=LimeGreen]
    \node[anchor=north west](CNW) at (current page.north west){
        \pgfornament[width=2cm]{61}};
    \node[anchor=north east](CNE) at (current page.north east){
        \pgfornament[width=2cm,symmetry=v]{61}};
    \node[anchor=south west](CSW) at (current page.south west){
        \pgfornament[width=2cm,symmetry=h]{61}};
    \node[anchor=south east](CSE) at (current page.south east){
        \pgfornament[width=2cm,symmetry=c]{61}};
    \pgfornamenthline{CNW}{CNE}{north}{87}
    \pgfornamenthline{CSW}{CSE}{south}{87}
    \pgfornamentvline{CNW}{CSW}{west}{87}
    \pgfornamentvline{CNE}{CSE}{east}{87}
    \end{tikzpicture}
}

\newcommand{\plogo}{\includegraphics[width = 30mm]{logo.png}}

\newcommand{\psignature}{
    \begin{flushright}
        \def\svgwidth{40mm}
        \input{signature.pdf_tex}
    \end{flushright}
}

\newcommand{\mytitle}{
    \thispagestyle{empty}
    \ThisCenterWallPaper{1.12}{sfondo}

    \begin{tikzpicture}[remember picture, overlay]
    \node [rectangle, rounded corners, fill=LimeGreen, opacity=0.75, anchor=south west, minimum width=6cm, minimum height=8cm] (box) at (-0.5,-10) (box){};
    \node[anchor=west, xshift=-2.0cm, yshift=-1cm, text width=4cm] at (box.north){\large \textit{\theeditor}}; 
    \node[anchor=west, xshift=-2.0cm, yshift=-3.5cm, text width=4cm] at (box.north){\huge \thetitle};
    \node[anchor=west, xshift=-2.0cm, yshift=-6cm, text width=4cm] at (box.north){\large \theauthor};
    \end{tikzpicture}

    \newpage
}

\pagestyle{plain}

\setcounter{tocdepth}{2}
\renewcommand{\poemtoc}{section}%
\renewcommand{\poemtitlefont}{\normalfont\large\itshape\centering}

该节点实例应定义一个不透明度为 75% 的绿色圆角框：

\node [rectangle, rounded corners, fill=LimeGreen, opacity=0.75, anchor=south west, minimum width=6cm, minimum height=8cm] (box) at (-0.5,-10) (box){};

但只要我能看到盒子里充满了纯绿色......

我采纳建议的原始模板可以在以下链接中找到： 图书样本

当然它可以工作...但据我所知，它与我的没有什么不同，不会改变盒子的行为。

答案1

该包transparent自动加载的包svg与 TikZopacity密钥冲突。

您可以：

  1. 卸载svg软件包，以便 TikZ 不透明度能够按预期工作
  2. 通过在加载之前发出¹来卸载transparent包，这是冲突的真正根源（这可能会导致包行为异常）\expandafter\def\csname [email protected]\endcsname{}svgsvg

  3. 使用\transparent宏代替 Tikz 不透明度键，如下所示：

     {\transparent{0.5}\node [rectangle, rounded corners, fill=LimeGreen, anchor=south west, minimum width=6cm, minimum height=8cm] (box) at (-0.5,-10) (box){};}

外部的分组\transparent阻止将宏应用于整个 tikzpicture

另请参阅svg 包干扰不透明度

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