我的图像设计出了什么pic问题，它的相对定位改变了（仅）一个内部节点的位置：
梅威瑟：
\documentclass[tikz, border=3mm, many]{standalone}
\usetikzlibrary{arrows.meta, backgrounds, fit, scopes, positioning, quotes, shapes}
\begin{document}
\tikzset{
node distance = 0mm,
every label/.append style = {label distance=1pt},
LC/.style = {draw, thick, {Circle[open,fill=white]}-},
gonTx/.pic = {\node (t) [regular polygon, regular polygon sides=3,
draw, fill=white, text width=7mm, rotate=-90] {};
\draw[LC,thin,shorten <=-3pt] (t.side 1) -- ++ (-0.5,0)
coordinate (t1) --
node (r)[draw, fill= white, minimum height=4mm,
inner sep=1mm, label=right:$R_{G}$, midway] {}
(t.south -| t1) --
node (v) [circle, draw, fill=white, inner sep=0pt, anchor=center,
minimum size=4mm, text=teal!60!black, midway] {$u$}
(t1 |- t.side 3) -- (t.side 3);
\scoped[on background layer]
\node (bb) [fill=gray!30, inner sep=2mm,
fit=(t.corner 1)(t.corner 2) (t.corner 3) ] {};%(z)
\coordinate (-in) at (t.south);
\coordinate (-out) at (t.north);
},% end of gonTx
}
% with out positioning
\begin{tikzpicture}
\pic (T) {gonTx}; %
\draw[Straight Barb-] (T-in) to ["signal" '] ++ (-1.5,0);
\end{tikzpicture}
% with relative positioning to given coordinate
\begin{tikzpicture}
\coordinate (b1) at (1,0);
\pic (T) [left=22mm of b1] {gonTx}; %
\draw[Straight Barb-] (T-in) to ["signal" '] ++ (-1.5,0);
\end{tikzpicture}
\end{document}
答案1
毫无疑问，有人会提供更技术性的解释，必须注意的是，pics 的实现是极其有缺陷。知道如何解决缺陷对于以任何重要的方式使用它们都是必不可少的。
但是，我不确定这是一个错误，还是它们是pics 而不是nodes 的必然结果。节点具有各种功能，可帮助它最终到达正确的位置，而无需明确告知要去哪里。节点的放置是根据一组规则进行的，这些规则大多是猜测它们应该在哪里。特别是，anchor节点的 通常会被正确猜测，尽管显然有时必须明确指定。没有一种算法能够始终正确。
pics 的复杂程度要低得多。我认为，这里发生的事情是，当没有更多近端线索可以帮助做出更好的猜测时，单个节点的anchor选择取决于整体的位置。pic
因为pic是left=... of ...，所以节点的默认锚点是east。这就是我们在错误放置节点时看到的。其他节点不会以明显的方式发生这种情况，因为事物是相对于它们绘制的（(t)），而不是相对于其他事物绘制的，因为它们的anchor是明确给定的（(v)），或者因为它们的位置是完全独立确定的（(bb)）。如果我们覆盖 的默认锚点(r)，那么它就不再是错误放置的。
理想情况下，Ti钾Z 会优先使用来自 的定位提示，\path而不是来自周围 的放置的提示pic。但我不知道这是否可以实现。无论如何，pic正如我所说， 确实有很多错误，这可能只是另一个pic错误。
\documentclass[border=10pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{arrows.meta, backgrounds, fit, positioning, quotes, shapes.geometric}
\begin{document}
\tikzset{
node distance = 0mm,
every label/.append style = {label distance=1pt},
CB/.style = {thick, {Circle[open,fill=white]}-{Bar[width=3.4mm,line width=2pt]}},
LB/.style = {-{Bar[width=3.4mm,line width=2pt]}},
LC/.style = {draw, thick, {Circle[open,fill=white]}-},
Lr/.style = {red, very thick},
Lb/.style = {blue, very thick},
gonTx/.pic = {%
\node (t) [regular polygon, regular polygon sides=3, draw, fill=white, text width=7mm, rotate=-90] {};
\draw [LC, thin, shorten <=-3pt] (t.side 1) -- ++(-0.5,0) coordinate (t1) -- node (r) [draw, fill=red, minimum height=4mm, inner sep=1mm, label=right:$R_{G}$, midway, anchor=center] {} (t.south -| t1) -- node (v) [circle, draw, fill=white, inner sep=0pt, anchor=center, minimum size=4mm, text=teal!60!black, midway] {$u$} (t1 |- t.side 3) -- (t.side 3);
\scoped[on background layer]
\node (bb) [fill=gray!30, inner sep=2mm, fit=(t.corner 1)(t.corner 2) (t.corner 3) ] {};
\coordinate (-in) at (t.south);
\coordinate (-out) at (t.north);
},
}
% with out positioning
\begin{tikzpicture}
\pic (T) {gonTx};
\draw[Straight Barb-] (T-in) to ["signal" '] ++ (-1.5,0);
\end{tikzpicture}
% with relative positioning to given coordinate
\begin{tikzpicture}
\coordinate (b1) at (1,0);
\pic (T) [left=22mm of b1] {gonTx};
\draw[Straight Barb-] (T-in) to ["signal" '] ++ (-1.5,0);
\node at (b1) {b1};
\end{tikzpicture}
\end{document}