基本上我和這個問題中的其他人有同樣的問題使用 TikZ 繪製的小結不會出現交叉點。
我想讓一個結更小並有更粗的線條（粗或非常粗）：我的結果在圖片的左側可見。右邊的十字路口很好，而且應該是這樣。我玩弄了end tolerance=1pt和ignore endpoint intersections=false，但到目前為止還不起作用。
\documentclass[12pt]{standalone}
\usepackage{tikz}
\usetikzlibrary{decorations.pathmorphing,decorations.pathreplacing,decorations.shapes,decorations.markings,knots}
\begin{document}
\begin{tikzpicture}
\path (-1.2,-2.2)--(1.7,2.2);
\begin{knot}[
scale=0.8,
draft mode=crossings,
consider self intersections=true,
clip width=1,
flip crossing=6,
flip crossing=4,
flip crossing=7,
flip crossing=2,
line width=2pt,
onlywhenrendering/.style={
draw=white,
double=black,
doubledistance=6pt,
linecap=round,
},
]
\strand
(-1,0) to[out=90,in=180,looseness=1]
(0,0.5) to[out=0,in=90,looseness=1]
(1.5,-0.5) to[out=-90,in=0,looseness=1]
(1,-1) --
(-1,-1) to [out=180,in=180,looseness=1]
(-1,1.5) to [out=0,in=90,looseness=1]
(0.5,0.5) --(0.5,-1) to[out=-90,in=-90,looseness=2.9]
(-0.5,-1)--(-0.5,0.5) to[out=90,in=180,looseness=1]
(1,1.5)to[out=0,in=90,looseness=1]
(1.5,0.5)to[out=-90,in=0,looseness=1]
(0,-0.5) to[out=180,in=-90,looseness=1]
(-1,0)
;
\end{knot}
\draw (0,-2.4) node{$8_{17}$};
\begin{scope}[xshift=4cm]
\begin{knot}[
consider self intersections=true,
clip width=2,
flip crossing=1,
flip crossing=3,
flip crossing=5,
flip crossing=8,
]
\strand
(-1,0) to[out=90,in=180,looseness=1]
(0,0.5) to[out=0,in=90,looseness=1]
(1.5,-0.5) to[out=-90,in=0,looseness=1]
(1,-1.5) --
(-1,-1.5) to [out=180,in=180,looseness=1]
(-1,2) to [out=0,in=90,looseness=1]
(0.5,1) --(0.5,-1) to[out=-90,in=-90,looseness=2.9]
(-0.5,-1)--(-0.5,1) to[out=90,in=180,looseness=1]
(1,2)to[out=0,in=90,looseness=1]
(1.5,0.5)to[out=-90,in=0,looseness=1]
(0,-0.5) to[out=180,in=-90,looseness=1]
(-1,0)
;
\end{knot}
\draw (0,-2.4) node{Mirror image of $8_{17}$};
\end{scope}
\end{tikzpicture}
\end{document}
答案1
我不知道這是否仍然是一個相關的問題，但無論如何這裡都有一個答案。很抱歉我之前沒有發現這個問題（我在這裡不像以前那麼活躍了）。
無論如何，您的程式碼存在一些問題。一是對空間的忽視！它們非常重要。所以我已經修復了它們。
然後是line cap=round.這在你的結的起點做了奇怪的事。所以這也消失了。
最主要的是，所有交叉點都非常接近鏈中片段的端點。所以你需要ignore endpoint intersections=false.鍵end tolerance似乎對您的圖片沒有影響，但由於交叉點非常接近，因此必須仔細設定剪輯半徑和剪輯寬度。
這是我玩了一會兒數字之後得到的結果。
\documentclass[12pt]{standalone}
%\url{http://tex.stackexchange.com/q/241258/86}
\usepackage{tikz}
\usetikzlibrary{decorations.pathmorphing,decorations.pathreplacing,decorations.shapes,decorations.markings,knots}
\begin{document}
\begin{tikzpicture}
\path (-1.2,-2.2)--(1.7,2.2);
\begin{knot}[
scale=0.8,
%draft mode=crossings,
consider self intersections=true,
ignore endpoint intersections=false,
%end tolerance=1pt,
clip radius=8pt,
clip width=1,
flip crossing=6,
flip crossing=4,
flip crossing=7,
flip crossing=2,
line width=2pt,
only when rendering/.style={
white,
double=black,
double distance=6pt,
},
]
\strand
(-1,0) to[out=90,in=180,looseness=1]
(0,0.5) to[out=0,in=90,looseness=1]
(1.5,-0.5) to[out=-90,in=0,looseness=1]
(1,-1) --
(-1,-1) to [out=180,in=180,looseness=1]
(-1,1.5) to [out=0,in=90,looseness=1]
(0.5,0.5) --(0.5,-1) to[out=-90,in=-90,looseness=2.9]
(-0.5,-1)--(-0.5,0.5) to[out=90,in=180,looseness=1]
(1,1.5)to[out=0,in=90,looseness=1]
(1.5,0.5)to[out=-90,in=0,looseness=1]
(0,-0.5) to[out=180,in=-90,looseness=1]
(-1,0)
;
\end{knot}
\draw (0,-2.4) node{$8_{17}$};
\begin{scope}[xshift=4cm]
\begin{knot}[
consider self intersections=true,
clip width=2,
flip crossing=1,
flip crossing=3,
flip crossing=5,
flip crossing=8,
]
\strand
(-1,0) to[out=90,in=180,looseness=1]
(0,0.5) to[out=0,in=90,looseness=1]
(1.5,-0.5) to[out=-90,in=0,looseness=1]
(1,-1.5) --
(-1,-1.5) to [out=180,in=180,looseness=1]
(-1,2) to [out=0,in=90,looseness=1]
(0.5,1) --(0.5,-1) to[out=-90,in=-90,looseness=2.9]
(-0.5,-1)--(-0.5,1) to[out=90,in=180,looseness=1]
(1,2)to[out=0,in=90,looseness=1]
(1.5,0.5)to[out=-90,in=0,looseness=1]
(0,-0.5) to[out=180,in=-90,looseness=1]
(-1,0)
;
\end{knot}
\draw (0,-2.4) node{Mirror image of $8_{17}$};
\end{scope}
\end{tikzpicture}
\end{document}
