曲线为什么会出现虚线？
\documentclass[border=1pt]{standalone}
\usepackage[dvipsnames,svgnames,x11names,]{xcolor}
\usepackage{pgfplots}
\pgfplotsset{compat=1.12}
\begin{document}
\begin{tikzpicture}[line cap=round,line join=round]
\begin{axis}[view={20}{30},
xmin=-2, xmax=2,
ymin=-2, ymax=2,
zmin=-0, zmax=6.5,
xtick=\empty,
ytick=\empty,
ztick=\empty,
%enlargelimits=false,
]
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1 ,domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))}, {1*sin((t))}, {1});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({2*cos((t))}, {2*sin((t))}, {.5});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/2.05}, {1*sin((t))/2.05}, {2.05});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/3}, {1*sin((t))/3}, {3});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/4.2}, {1*sin((t))/4.2}, {4.2});
\addplot3+[no markers, variable=t, DeepPink1 ,domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))}, {1*sin((t))}, {6.5});
\addplot3+[no markers, variable=t,, domain={-180}:{180},samples=51, samples y=0] ({2*cos((t))}, {2*sin((t))}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/2.05}, {1*sin((t))/2.05}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/3}, {1*sin((t))/3}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/4.2}, {1*sin((t))/4.2}, {6.5});
\end{axis}
\end{tikzpicture}
\end{document}
答案1
答案
曲线为何会出现虚线？
是
因为 pgfplots 循环浏览样式列表，其中一些是虚线。
为了使所有图都坚固，您可以使用every axis plot post/.append style={solid}。
\documentclass[border=1pt]{standalone}
\usepackage[dvipsnames,svgnames,x11names,]{xcolor}
\usepackage{pgfplots}
\pgfplotsset{compat=1.17}
\begin{document}
\begin{tikzpicture}[line cap=round,line join=round]
\begin{axis}[view={20}{30},
xmin=-2, xmax=2,
ymin=-2, ymax=2,
zmin=-0, zmax=6.5,
xtick=\empty,
ytick=\empty,
ztick=\empty,
every axis plot post/.append style={solid}
%enlargelimits=false,
]
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1 ,domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))}, {1*sin((t))}, {1});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({2*cos((t))}, {2*sin((t))}, {.5});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/2.05}, {1*sin((t))/2.05}, {2.05});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/3}, {1*sin((t))/3}, {3});
\addplot3+[no markers, variable=t, line width=1pt, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/4.2}, {1*sin((t))/4.2}, {4.2});
\addplot3+[no markers, variable=t, DeepPink1 ,domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))}, {1*sin((t))}, {6.5});
\addplot3+[no markers, variable=t,, domain={-180}:{180},samples=51, samples y=0] ({2*cos((t))}, {2*sin((t))}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/2.05}, {1*sin((t))/2.05}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/3}, {1*sin((t))/3}, {6.5});
\addplot3+[no markers, variable=t, DeepPink1, domain={-180}:{180},samples=51, samples y=0] ({1*cos((t))/4.2}, {1*sin((t))/4.2}, {6.5});
\end{axis}
\end{tikzpicture}
\end{document}
