圆圈区域的底纹

Question

我试图在被角度扫出的这个圆的楔形阴影中着色：

代码如下：

 select object_id, 
 change_time,
 old_value,
 new_value   ,
 DENSE_RANK() over ( partition by object_id order by change_time) "seq_no"
from (
;with cte
as (
select * from #tmpfup
union 
select distinct fup.object_id, datee.change_time, datee.old_value, 
datee.new_value
from #tmpfup fup, #tmpdate datee
)
select * from cte 
)

我尝试使用\documentclass{article} \usepackage{pgfplots} \pgfplotsset{compat=1.15} \usetikzlibrary{quotes,angles} \begin{document} \begin{figure}[ht] \centering \begin{tikzpicture}[scale=1,line width=1pt] \begin{axis}[ color= white, xmin=-1.5, xmax=1.5, ymin=-1.5, ymax=1.5, axis equal image, axis lines=middle, xticklabels={}, yticklabels={}, font=\scriptsize, ticks=none, xlabel = $x(t)$, ylabel = $y(t)$, inner axis line style={stealth-stealth} ] \draw[black] (0,0) circle [radius=1]; \draw[<->] (1,0) coordinate (a) %node[right] {} -- (0,0) coordinate (b) %node[left] {b} -- (0.3,0.953939) coordinate (c) %node[above right] {c} pic[draw=orange, <->, angle eccentricity=1.2, angle radius=1cm] {angle=a--b--c}; \draw[black, ->] coordinate (a) (0,0) -- (1,0); \draw[black, ->] coordinate (b) (0,0) -- (0.3,0.953939); \node[black, left, scale=1] at (0.3, 0.17) {$\theta$}; \end{axis} \end{tikzpicture} \end{figure} \end{document} ，但是这很令人困惑，我确定必须有一种更有效的方法，例如在原因内定义路径和阴影？

Answer 1

您可以将 opacity参数用于工程图该部分的组件：

\begin{tikzpicture}[scale=1,line width=1pt]
  \begin{axis}[
    color= white,
    xmin=-1.5, 
    xmax=1.5, 
    ymin=-1.5, 
    ymax=1.5, 
    axis equal image, 
    axis lines=middle, 
    xticklabels={}, 
    yticklabels={},
    font=\scriptsize,
    ticks=none,
    xlabel = $x(t)$,
    ylabel = $y(t)$,
    inner axis line style={stealth-stealth}
  ]
    \draw[black] (0,0) circle [radius=1];
    \draw[<->,opacity=0.5]
        (1,0) coordinate (a) %node[right] {}
        -- (0,0) coordinate (b) %node[left] {b}
        -- (0.3,0.953939) coordinate (c) %node[above right] {c}
        pic[draw=orange, <->, angle eccentricity=1.2, angle radius=1cm]
        {angle=a--b--c};
    \draw[black, ->, opacity=0.5] coordinate (a) (0,0) -- (1,0);
    \draw[black, ->, opacity=0.5] coordinate (b) (0,0) -- (0.3,0.953939);
    \node[black, left, scale=1, opacity=0.5] at (0.3, 0.17) {$\theta$};
  \end{axis}
\end{tikzpicture}