`mindmap` 包：概念颜色不会褪色

Question

我正在尝试按照第 6 个教程进行操作pgf 手册。我设法创建了思维导图，但我无法正确地将一种颜色淡化为另一种颜色：

这是生成图像的代码（我已包含mindmap和shadows库）：

\begin{tikzpicture} [mindmap] 
\begin{scope}[
    every node/.style={concept, execute at begin node=\hskip0pt, circular drop shadow},
    root concept/.append style={concept color=black, fill=white, line width=1ex, text=black, font=\large\scshape},
    text=white,
    computational problems/.style={concept color=red, faded/.style={concept color=red!50}},
    computational models/.style={concept color=blue, faded/.style={concept color=blue!50}},
    measuring complexity/.style={concept color=orange, faded/.style={concept color=orange!50}},
    solving problems/.style={concept color=green!50!black, faded/.style={concept color=green!50!black!50}},
    grow cyclic,
    level 1/.append style={sibling angle=90, level distance=4.5cm, font=\scshape},
    level 2/.append style={sibling angle=45, level distance=3cm, font=\footnotesize},
    ]
    \node[root concept] {Computational Complexity}
        child[computational problems] { node {Computational Problems}
            child { node {Problem Measures} }
            child { node {Problem Aspects} }
            child { node[concept color=blue] {Problem Domains} }
            child { node {Key Problems} }
        }
        child[computational models] { node {Computational Models}
            child { node {Turing Machines} }
            child { node[faded] {Random-Access Machines} }
            child { node {Circuits} }
            child { node[faded] {Binary Decision Diagrams} }
            child { node {Oracle Machines} }
            child { node {Programming in Logic} }
        }
        child[measuring complexity] { node {Measuring Complexity}
            child { node {Complexity Measures} }
            child { node {Classifying Complexity} }
            child { node {Comparing Complexity} }
            child { node[faded] {Describing Complexity} }
        }
        child[solving problems] { node {Solving Problems}
            child { node {Exact Algorithms} }
            child { node {Randomization} }
            child { node {Fixed-Parameter Algorithms} }
            child { node {Parallel Computation } }
            child { node {Partial Solutions} }
            child { node {Approximation} }
        };
\end{scope}
\end{tikzpicture}

这与手册中提供的代码相同（我也尝试复制并粘贴手册中的代码，但没有成功）。

有谁知道为什么我无法重现手册中显示的行为（即不同概念颜色之间的“褪色”）？

提前致谢

Answer 1

您将选项传递给节点，而不是子节点。如果您更正此问题，您将得到

\documentclass[tikz,border=3mm]{standalone}
\usetikzlibrary{mindmap,shadows}
\begin{document}
\begin{tikzpicture} [mindmap] 
\begin{scope}[
    every node/.style={concept, execute at begin node=\hskip0pt, circular drop shadow},
    root concept/.append style={concept color=black, fill=white, line width=1ex, text=black, font=\large\scshape},
    text=white,
    computational problems/.style={concept color=red, 
    faded/.style={concept color=red!50}},
    computational models/.style={concept color=blue, 
    faded/.style={concept color=blue!50}},
    measuring complexity/.style={concept color=orange, faded/.style={concept color=orange!50}},
    solving problems/.style={concept color=green!50!black, faded/.style={concept color=green!50!black!50}},
    grow cyclic,
    level 1/.append style={sibling angle=90, level distance=4.5cm, font=\scshape},
    level 2/.append style={sibling angle=45, level distance=3cm, font=\footnotesize},
    ]
    \node[root concept] {Computational Complexity}
        child[computational problems] { node {Computational Problems}
            child { node {Problem Measures} }
            child { node {Problem Aspects} }
            child[concept color=blue] { node {Problem Domains} }
            child { node {Key Problems} }
        }
        child[computational models] { node {Computational Models}
            child { node {Turing Machines} }
            child[faded] { node {Random-Access Machines} }
            child { node {Circuits} }
            child[faded] { node {Binary Decision Diagrams} }
            child { node {Oracle Machines} }
            child { node {Programming in Logic} }
        }
        child[measuring complexity] { node {Measuring Complexity}
            child { node {Complexity Measures} }
            child { node {Classifying Complexity} }
            child { node {Comparing Complexity} }
            child[faded] { node {Describing Complexity} }
        }
        child[solving problems] { node {Solving Problems}
            child { node {Exact Algorithms} }
            child { node {Randomization} }
            child { node {Fixed-Parameter Algorithms} }
            child { node {Parallel Computation } }
            child { node {Partial Solutions} }
            child { node {Approximation} }
        };
\end{scope}
\end{tikzpicture}
\end{document}

计划使这一区别更加明确在 pgfmanual 的未来版本中。