如何根据色调的退化调整 3D 色调的自定义色彩图

Question

我有这个数字：

\begin{tikzpicture}[scale=1]

\begin{axis}[xmin=0,xmax=1,ymin=0,ymax=1,enlargelimits=false,xlabel=$a_1$,ylabel=$a_2$] 
    \addplot [blue!80!black,fill=blue,fill opacity=0.4]
coordinates
{(0., 0.) (0., 0.2629952) (0., 0.43830780032) (0.1096032496, 
 0.43830780032) (0.6572250048, 0.26310039808) (0.657488, 0.)}
|- (axis cs:0,0) -- cycle;


\end{axis}
\end{tikzpicture}

我想对这个 3D 图形使用不同的等级（自定义色彩图）：

\begin{tikzpicture}
\begin{axis}[view/v=25,view/h=110,xlabel=$a_1$,ylabel=$a_2$,zlabel=$a_3$,
    colormap/greenyellow,
    xmin=0,xmax=1,ymin=0,ymax=1,zmin=0,zmax=1, grid=major]
\addplot3[%xmin=0,xmax=1,
    opacity=0, 
    fill opacity=0.6,
    table/row sep=\\,
    patch,
    patch type=polygon,
    vertex count=3,
    patch table with point meta={%
    % pt1 pt2 pt3 pt4 pt5 cdata
      0 1   2   1. \\
      2 3   0   3. \\
      0 3   4   2. \\
      3 2   4   2.12132 \\
      2 1   4   3.53553 \\
      1 0   4   2. \\
      }
]
table {
    x y z\\
    0   0   0 \\
    0   0   0.657488 \\
    0   0.657488    0 \\
    0.657488    0   0 \\
    0.657488    0   0.657488 \\
};

\end{axis}
\end{tikzpicture}

根据第一个图颜色的等级：blue!80!black。例如，如何创建从blue!20!black到的颜色图blue!80!black，例如 8 或 9 个级别？

问候

Answer 1

\documentclass{article}

\usepackage{pgfplots}
\pgfplotsset{compat=1.16}

\usepgfplotslibrary{patchplots}


\begin{document}
\begin{tikzpicture}
\begin{axis}[view/v=25,view/h=110,xlabel=$a_1$,ylabel=$a_2$,zlabel=$a_3$,
    colormap={darkblue}{color=(blue!20!black) color=(blue!80!black)},
    xmin=0,xmax=1,ymin=0,ymax=1,zmin=0,zmax=1, grid=major]
\addplot3[%xmin=0,xmax=1,
    opacity=0, 
    fill opacity=0.6,
    table/row sep=\\,
    patch,
    patch type=polygon,
    vertex count=3,
    patch table with point meta={%
    % pt1 pt2 pt3 pt4 pt5 cdata
      0 1   2   1. \\
      2 3   0   3. \\
      0 3   4   2. \\
      3 2   4   2.12132 \\
      2 1   4   3.53553 \\
      1 0   4   2. \\
      }
]
table {
    x y z\\
    0   0   0 \\
    0   0   0.657488 \\
    0   0.657488    0 \\
    0.657488    0   0 \\
    0.657488    0   0.657488 \\
};

\end{axis}
\end{tikzpicture}
\end{document}