我正在使用 TikZ 工作，我想让一条线停止，然后在与另一条线相交之前和之后重新开始。我尝试在交点处放置一个节点并用白色填充，但这会切断两条线。我只希望蓝线断开，黑线继续。任何帮助都很好！
以下代码的作用如下：
\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}%
\usetikzlibrary{arrows.meta,shapes.misc, positioning, shapes.geometric, intersections}%
\begin{document}
\begin{tikzpicture}
\draw [-Latex, RoyalBlue, name path = b1] (0,-1) -- (10,-1);
\draw [-Latex, RoyalBlue, name path = b2] (0,-0.5) -- (10,-0.5);
\draw [-Latex, RoyalBlue, name path = b3] (0,0) -- (10,0);
\draw [-Latex, RoyalBlue, name path = b4] (0,0.5) -- (10,0.5);
\draw [-Latex, RoyalBlue, name path = b5] (0,1) -- (10,1);
\node[trapezium,
draw = black,
thick,
rotate=90,
minimum width = 2.5cm,
minimum height= 1cm,
trapezium left angle = 100,
trapezium right angle = 80,
trapezium stretches=true,
trapezium stretches body =true,
name path = trap1] (t) at (1,0) {};
\draw[name intersections={of=b1 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b2 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b3 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b4 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b5 and trap1}] (intersection-1) node[fill=white] {};
\end{tikzpicture}
\end{document}
答案1
这是一个使用spath3TikZ 库的解决方案。通过它，我们可以定义相关路径，在相关位置添加间隙，然后再绘制它们。
\documentclass{article}
%\url{https://tex.stackexchange.com/q/715947/86}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}%
\usetikzlibrary{
arrows.meta,
shapes.misc,
positioning,
shapes.geometric,
intersections,
spath3
}%
\begin{document}
\begin{tikzpicture}[>=Latex]
% Create and save the arrow paths
\foreach \k in {1,...,5} {
\path [spath/save global=b\k] (0,-1.5 + \k/2) -- ++(10,0);
}
% Create the trapezium shape
\node[
trapezium,
rotate=90,
minimum width = 2.5cm,
minimum height= 1cm,
trapezium left angle = 100,
trapezium right angle = 80,
trapezium stretches=true,
trapezium stretches body =true,
spath/save global=trap1
] (t) at (1,0) {};
% Split the trapezium and each of the arrows where they meet,
% then insert gaps in the arrow paths at one of the intersections,
% then remove the split in the arrow paths where we didn't insert a gap.
\foreach \k in {1,...,5} {
\tikzset{
spath/split globally at intersections={trap1}{b\k},
spath/insert gaps globally after components={b\k}{5pt}{1},
spath/spot weld globally={b\k},
}
}
% This inserts the gaps in the trapezium path, we make an alias style
% just to shorten the code.
\tikzset{
do stuff/.style={
spath/insert gaps after components={trap1}{5pt}{#1},
},
do stuff/.list={5,6,7,8,9},
}
% Now render the arrow paths
\foreach \k in {1,...,5} {
\draw[spath/use=b\k, ->, RoyalBlue];
}
% Now render the trapezium path
\draw[black,thick,spath/use=trap1];
\end{tikzpicture}
\end{document}
结果如下：
答案2
我知道这只是一种解决方法，但您可以使用该节点两次：第一次用于交叉点，第二次用于实际绘制它。
为了让事情变得简单一点，您还可以为节点添加样式，以便随时重复使用它。坐标也可以这样做，这样您就可以命名坐标以供多次使用。
\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}%
\usetikzlibrary{arrows.meta,shapes.misc, positioning, shapes.geometric, intersections}%
\tikzset{
tnode/.style = {
trapezium,
thick,
rotate=90,
minimum width = 2.5cm,
minimum height= 1cm,
trapezium left angle = 100,
trapezium right angle = 80,
trapezium stretches=true,
trapezium stretches body =true,
name path = trap1,
},
}
\begin{document}
\begin{tikzpicture}
\coordinate (ct) at (1,0);
\node[tnode] (t) at (ct) {};
\draw [-Latex, RoyalBlue, name path = b1] (0,-1) -- (10,-1);
\draw [-Latex, RoyalBlue, name path = b2] (0,-0.5) -- (10,-0.5);
\draw [-Latex, RoyalBlue, name path = b3] (0,0) -- (10,0);
\draw [-Latex, RoyalBlue, name path = b4] (0,0.5) -- (10,0.5);
\draw [-Latex, RoyalBlue, name path = b5] (0,1) -- (10,1);
\draw[name intersections={of=b1 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b2 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b3 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b4 and trap1}] (intersection-1) node[fill=white] {};
\draw[name intersections={of=b5 and trap1}] (intersection-1) node[fill=white] {};
\node [tnode, draw] at (ct) {};
\end{tikzpicture}
\end{document}
编辑。基于scope和background层的示例。
\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{
arrows.meta,
shapes.misc,
positioning,
shapes.geometric,
intersections,
backgrounds, % For a background layer
}
\begin{document}
\begin{tikzpicture}
\node[
trapezium,
draw = black,
thick,
rotate=90,
minimum width = 2.5cm,
minimum height= 1cm,
trapezium left angle = 100,
trapezium right angle = 80,
trapezium stretches=true,
trapezium stretches body =true,
name path = trap1,
] (t) at (1,0) {};
\begin{scope}[on background layer]
\foreach \c [evaluate=\c as \y using {\c/2}] \n in {-2,...,2} {
\draw [-Latex, RoyalBlue, name path={b\c}] (0,\y) -- (10,\y);
\path [name intersections={of={b\c} and trap1, name=i}] (i-1) node[fill=white] {};
};
\end{scope}
\end{tikzpicture}
\end{document}
答案3
我会利用 TikZ 尊重绘制顺序这一事实。想法是先用白色覆盖蓝色箭头，然后再绘制梯形。我做了一些额外的改进。
\documentclass{article}
\usepackage[dvipsnames]{xcolor}
\usepackage{tikz}
\usetikzlibrary{arrows.meta}
\begin{document}
\begin{tikzpicture}
% Drawing from background to foreground.
% Note that the blue arrows will be on top of the right side of the trapezoid.
\draw[xshift=1cm, thick] (.5,1.2) -- (.5,-1.1);
% \foreach loop, my favourite features in TikZ
\foreach \y in {-1,-.5,...,1}
\draw [-Latex, RoyalBlue] (0,\y) -- (10,\y);
% Overdrawing blue arrows with white.
% Width is "ultra thick" (1.6pt) + "thick" (.8pt) + "ultra thick" (1.6pt).
\draw[xshift=1cm, white, line width=4pt] (-.5,1.1) -- (-.5,-1.2);
% The thick lines of the trapezoid's sides at the top and bottom right corners don't look good.
% I added line cap to make it almost unnoticeable, but still not perfect.
\draw[xshift=1cm, thick, line cap=rect] (.5,1.2) -- (-.5,1.1) -- (-.5,-1.2) -- (.5,-1.1);
\end{tikzpicture}
\end{document}
line cap由于盖子与 y 轴不平行，因此解决方案仍然不完美。为了避免这种情况，您可以一次性完成\draw整个梯形或使用您的trapezium形状。但是，这会失去蓝色箭头位于梯形右侧顶部的属性。
答案4
好吧，如果您需要将图像放在多色背景上，则可能需要使用交叉点，但如果所有背景都是特定的颜色，在本例中是白色，您可以使用图层并使用一些与背景相同的颜色进行绘制以模拟切割，然后利用使用3D library，不必使用梯形，例如在示例中，我在平面上绘制了线条XY以使用 3D 平面手动定位，然后在垂直平面上绘制一个正方形，但由中轴划分，以便在不同的图层上绘制一部分，然后在绘图样式选项中通过上一个操作，您可以绘制一条比原始宽度更大的白线，并模拟所需的视觉分离，我增加了宽度以便一切都可视化。
在这种情况下，\hooks定义了两个绘图指令，一个在背景层中，对应于第一个半正方形，另一个在普通层中；选项#1和#2的放置方式是我可以为每个选项放置绘图属性，因此在第一个示例中，我可以放置两种不同的颜色，对于第三个示例，我可以添加具有更大白色宽度的预作用样式，最后是相同的，但对于任何图像，当然都是在YZ平面上绘制的。
结果：
梅威瑟：
\documentclass[border=0.5cm]{standalone}
\usepackage{tikzducks}
\usepackage[dvipsnames]{xcolor}
\usetikzlibrary{3d,graphs,arrows.meta}
\pgfdeclarelayer{background layer}
\pgfdeclarelayer{foreground layer}
\pgfsetlayers{background layer,main}
\begin{document}
\begin{tikzpicture}
\def\hooks#1#2{
\draw[#1, rounded corners=3pt, line width=2pt] (0,1.2) -| (1,0) |- (0,-1.2););
\begin{pgfonlayer}{background layer}
\draw[#2, rounded corners=3pt, line width=2pt] (0,1.2) -| (-1,0) |- (0,-1.2);
\end{pgfonlayer}
}
\begin{scope}[canvas is xy plane at z=0]
\foreach \y in {-1,-.5,...,1}
\draw [-Latex, RoyalBlue,line width=2pt,preaction={draw=white,line width=3.5pt}] (0,\y) -- (7,\y);
\end{scope}
\begin{scope}[canvas is zy plane at x=0.75]
\hooks{blue}{red}
\end{scope}
\begin{scope}[canvas is zy plane at x=2]
\hooks{black}{black}
\end{scope}
\begin{scope}[canvas is zy plane at x=3.25]
\hooks{green!50!blue,preaction={draw=white,line width=3.5pt,shorten <=1pt,shorten >=1pt}}{green!50!blue}
\end{scope}
\begin{scope}[canvas is zy plane at x=5]
\clip(2.5,1.5) rectangle (0,-1.5);
\draw(0,0)node[transform shape]{\includegraphics[height=2.2cm]{example-image-duck}};
\begin{pgfonlayer}{background layer}
\clip(-2.5,1.5) rectangle (0,-1.5);
\draw(0,0)node[transform shape]{\includegraphics[height=2.2cm]{example-image-duck}};
\end{pgfonlayer}
\end{scope}
\end{tikzpicture}
\end{document}