积分三角形 - tikzset

Question

我想在我的 tikzset 中添加一个积分三角形。我的意思如图所示；

如您所见，它仅由一个矩形和一个三角形组成。我希望它能像此 tikzset 中的其他节点一样工作；

\tikzset{
    block/.style = {draw, fill=white, rectangle, minimum height=3em, minimum width=3em},
    tmp/.style = {coordinate},
    sum/.style = {draw, fill=white, circle, node distance=1cm},
    input/.style = {coordinate},
    output/.style = {coordinate},
    pinstyle/.style = {pin edge={to-, thin, black}},
    transfer_func/.style= {draw, fill=white, rectangle}
}

有人能帮我制作一种称为积分器的样式吗？其中输入节点如图所示，输出节点是三角形的尖端。如果有帮助的话，我制作了正确的形状，但不知道如何让它作为节点工作，也不知道如何修复输出，以便可以进一步使用它来创建框图。

integrator/.style = {to path={(\tikztostart) -- ++(0,0.55) -- ++(0.2, 0) -- ++(0.7, -0.55) -- ++(-0.7, -0.55) -- ++(0,1.1) -- ++(0, -1.1) -- ++(-0.2, 0) -- (\tikztotarget) cycle}}

Answer 1

像这样：

\documentclass[margin=3mm]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta, 
                quotes,
                }

\begin{document}
    \begin{tikzpicture}[
INT/.style = {
    rectangle, draw, semithick, outer sep=0pt,
    minimum height=12mm, minimum width=3mm,
    append after command={\pgfextra{\let\LN\tikzlastnode
                \draw[semithick, line cap=round]
                        (\LN.north east) -- ++ (9mm,-6mm) coordinate (\LN-out)
                                         -- (\LN.south east);
                \coordinate (\LN-in)    at (\LN.west);
                                    }% end after command
                            },% end after command
    node contents= {}
              }% end of IN T
    ]
\node (X) [INT];
%
\draw[red] (X-out) to["$\int u\,dt$"] ++ (1,0);
\draw[Straight Barb-,blue] (X-in) to ["$u(t)$" '] ++ (-1,0);

    \end{tikzpicture}
\end{document}

Answer 2

这是一个不寻常的解决方案，它包含

• integrator angle可以设置三角形角度的值键，

• 箭头尖端 Integrator Cap使用上述值，以便它正好适合三角形的尖端，并且

• integrator选择形状、single arrow设置一些尺寸并使用的样式integrator angle。

  此样式还临时将垂直线添加到形状定义中。它可能需要根据不同的outer ysep设置进行调整，但很少会改变。

代码

\documentclass[tikz]{standalone}
\usetikzlibrary{arrows.meta, shapes.arrows}
\makeatletter
\tikzset{
  integrator angle/.initial=60,
  Integrator Cap/.tip={
    Triangle Cap[cap angle=\pgfkeysvalueof{/tikz/integrator angle}, reversed,
      sep=+0pt -.5/tan(.5*(\pgfkeysvalueof{/tikz/integrator angle}))]},
  integrator/.style={
    shape=single arrow, draw, minimum height=+7.5mm, minimum width=+10mm,
    single arrow tip angle=\pgfkeysvalueof{/tikz/integrator angle},
    single arrow head extend=+0pt,
    /utils/exec=% outer seps are usually .5\pgflinewidth and are rarely changed
      \pgfutil@namedef{pgf@sh@fbg@single arrow}{% fbg is the before background path
        \pgfsetbuttcap                          % force butt cap,
        \pgfpathmoveto{\pgfpointadd{\pgf@sh@reanchor{single arrow}{before head}}
              {\pgfpoint{+.5\pgflinewidth}{-(\pgfkeysvalueof{/pgf/outer ysep})}}}%
        \pgfpathlineto{\pgfpointadd{\pgf@sh@reanchor{single arrow}{after head}}
              {\pgfpoint{+.5\pgflinewidth}{\pgfkeysvalueof{/pgf/outer ysep})}}}%
        \pgfusepathqstroke}}}        % no arrow tip, no shortening, no corners
\makeatother
\begin{document}
\tikz[ultra thick, >=Stealth]
  \node[integrator, draw=red, fill=blue!50]{}
    edge[<-] +(left:1)
    edge[Integrator Cap->] +(right:1.5);
\end{document}

输出