有些线条看起来很粗,有些则不粗

有些线条看起来很粗,有些则不粗

使用以下代码只会使最后一个“绘制”命令行中指定的矩形周围的线条看起来正常,无论尝试如何使它们变粗

 \usepackage{tikz}
 \begin{document}


 \begin{tikzpicture}
 \draw[draw=gray, dashed, thick, ->] (4.125,-4) -- (4.125,4);
 \draw[dashed, very thick, ->] (0,0) -- (8,0);
 \filldraw[thick , fill=gray, draw=black] (4,1) rectangle (4.25,3);
 \filldraw[thick , fill=gray, draw=black] (4,-0.5) rectangle (4.25,0.5);
 \filldraw[thick , fill=gray, draw=black] (4,-1) rectangle (4.25,-3);
 \filldraw[thick , fill=red, draw=black] (0,0.75) circle (0.1cm);
 \filldraw[thick , fill=blue, draw=black] (0,-0.75) circle (0.1cm);
 \draw[thick , ->] (0.1,0.75) -- (4.25,0.75);
 \draw[thick , ->] (0.1,-0.75) -- (4.25, -0.75);
 \filldraw[thick, draw=black, fill=gray] (8,-3) rectangle (8.25,3);


 \end{tikzpicture}
 \end{document}

答案1

我放大了它,它起作用了,谢谢大家

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