Alterando o sombreamento radial

Question

Estou tentando alterar o sombreamento radial fornecido:

\documentclass[10pt]{article}

\usepackage{blindtext}
\usepackage{XCharter}
\usepackage[T1]{fontenc}

\usepackage{graphicx}
\usepackage[x11names,svgnames,dvipsnames]{xcolor}
\usepackage[tikz]{bclogo}
\usetikzlibrary{calc}
\usetikzlibrary{shapes}

\usepackage[most]{tcolorbox}



\definecolor{recyclecolor}{RGB}{154,84,158}

\makeatletter

\tcbset{%
  decoration downshift/.store in={\decoration@downshift},
  decoration radius/.store in={\decoration@radius},
  decoration recycle radius/.store in={\decoration@recyclecircleradius},
  decoration dot radius/.store in={\decoration@dotradius},
  decoration content/.store in={\decoration@content},
  decoration colour/.store in={\decoration@colour},
}

\tcbset{recyclebox/.style={decoration radius=0.5cm,decoration downshift=-0.5cm}}

\tcbset{learnthisbox/.style={%
    decoration radius=0.5cm,
    decoration downshift=-0.5cm,
    decoration content={\bclampe},
    decoration colour=blue}
}


\newtcolorbox{recyclebox}[2][]{%
  recyclebox,
  decoration recycle radius={0.6*\decoration@radius},
  decoration dot radius={0.04*\decoration@radius},
  decoration colour=recyclecolor,
  breakable,
  enhanced jigsaw,
  leftrule=1.5pt,
  fonttitle={\bfseries\large},
  title={\MakeUppercase{Recycle!}},
  #1,
  attach title to upper={{\bfseries\large #2}\par},
  interior style={shading=radial,inner color=tcbcol@back!0,outer color=tcbcol@back},
  underlay unbroken and first={%
    \draw[tcbcol@frame,line width=\kvtcb@left@rule,fill=tcbcol@back] ($(frame.north west) + (\kvtcb@[email protected],\decoration@downshift)$) arc [start angle=90.0,end angle=270.0,radius=\decoration@radius] node[midway,inner sep=0pt] (dottedcircle) {};
    \foreach \x in {1,...,12} {%
      \draw[fill=tcbcol@back,opacity=4*(\x/12),tcbcol@frame] ($(dottedcircle) + (\decoration@radius,0cm)+(120+\x*30:\decoration@recyclecircleradius)$) circle (\decoration@dotradius);
    };
  },
  colframe={\decoration@colour},
  colback={tcbcol@frame!30},
  coltitle={tcbcol@frame!150},
}


\makeatother




\begin{document}

\begin{recyclebox}[decoration radius={0.4cm},decoration dot radius=0.03cm]{~title}
\blindtext[1]
\end{recyclebox}


\end{document}

O que eu quero é aumentar o sombreamento radial para que o preenchimento branco fique maior.

O código mostra:

Existe outro tipo de sombreamento? Retangular? Como fazer isso?

Answer 1

A chave para alterar um sombreamento radial é \pgfdeclareradialshading, consulte o pgfmanual em109.2.2 Radial Shadings

\pgfdeclareradialshading[inner color,middle color, outer color]{ustanakradial}{\pgfpoint{0.0cm}{0.0cm}}%
{ color(0)=(inner color);
  color(10bp)=(middle color);
  color(28bp)=(outer color)
}

Isto define um sombreamento radial denominado ustanakradial, com alguns nomes de cores simbólicos que são aplicados nos círculos com raios relevantes. Os valores de 10pte 28ptsão apenas 'suposições'. Não os exagere.

O centro do sombreamento é fixado aqui em \pgfpoint{0cm}{0cm}.

\documentclass[10pt]{article}

\usepackage{blindtext}
\usepackage{XCharter}
\usepackage[T1]{fontenc}

\usepackage{graphicx}
\usepackage[x11names,svgnames,dvipsnames]{xcolor}
\usepackage[tikz]{bclogo}
\usetikzlibrary{calc}
\usetikzlibrary{shapes}

\usepackage[most]{tcolorbox}



\definecolor{recyclecolor}{RGB}{154,84,158}

\makeatletter


\tikzset{%
  ustanakradial inner color/.code={\colorlet{inner color}{#1}},
  ustanakradial middle color/.code={\colorlet{middle color}{#1}},
  ustanakradial outer color/.code={\colorlet{outer color}{#1}},
}

\tcbset{%
  decoration downshift/.store in={\decoration@downshift},
  decoration radius/.store in={\decoration@radius},
  decoration recycle radius/.store in={\decoration@recyclecircleradius},
  decoration dot radius/.store in={\decoration@dotradius},
  decoration content/.store in={\decoration@content},
  decoration colour/.store in={\decoration@colour},
}

\tcbset{recyclebox/.style={decoration radius=0.5cm,decoration downshift=-0.5cm}}

\tcbset{learnthisbox/.style={%
    decoration radius=0.5cm,
    decoration downshift=-0.5cm,
    decoration content={\bclampe},
    decoration colour=blue}
}


\pgfdeclareradialshading[inner color,middle color, outer color]{ustanakradial}{\pgfpoint{0.0cm}{0.0cm}}%
{ color(0)=(inner color);
  color(10bp)=(middle color);
  color(28bp)=(outer color)
}




\newtcolorbox{recyclebox}[2][]{%
  recyclebox,
  decoration recycle radius={0.6*\decoration@radius},
  decoration dot radius={0.04*\decoration@radius},
  decoration colour=recyclecolor,
  breakable,
  enhanced jigsaw,
  leftrule=1.5pt,
  fonttitle={\bfseries\large},
  title={\MakeUppercase{Recycle!}},
  #1,
  attach title to upper={{\bfseries\large #2}\par},
  interior style={shading=ustanakradial,ustanakradial inner color=tcbcol@back!0,ustanakradial middle color=tcbcol@back!0,ustanakradial outer color=tcbcol@back},
  underlay unbroken and first={%
    \draw[tcbcol@frame,line width=\kvtcb@left@rule,fill=tcbcol@back] ($(frame.north west) + (\kvtcb@[email protected],\decoration@downshift)$) arc [start angle=90.0,end angle=270.0,radius=\decoration@radius] node[midway,inner sep=0pt] (dottedcircle) {};
    \foreach \x in {1,...,12} {%
      \draw[fill=tcbcol@back,opacity=4*(\x/12),tcbcol@frame] ($(dottedcircle) + (\decoration@radius,0cm)+(120+\x*30:\decoration@recyclecircleradius)$) circle (\decoration@dotradius);
    };
  },
  colframe={\decoration@colour},
  colback={tcbcol@frame!30},
  coltitle={tcbcol@frame!150},
}


\makeatother




\begin{document}

\begin{recyclebox}[decoration radius={0.4cm},decoration dot radius=0.03cm]{~title}
\blindtext[1]
\end{recyclebox}


\end{document}