平滑線條之間的連接處

Question

我想讓這張 tikz 圖片更漂亮。

首先，是否可以平滑圖形不同部分之間的連接處，例如半圓和直線之間的連接處？

那麼，是否可以對曲線下方（即曲線和 x 軸之間）的部分進行著色？只有第二部分已在上一個問題中得到答案。

到目前為止，這是我的程式碼：

\documentclass[a4paper]{article}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage[]{xcolor}

\begin{document}

\begin{tikzpicture}
%\draw [help lines] (-10,0) grid [step=3] (10,10);

\draw plot [domain=0:3] (\x, {(0.7*\x)^2});
\draw plot [domain=-3:0] (\x, {(0.7*\x)^2});

\draw (4,4.41) arc (0:180:0.5);
\draw (-3,4.41) arc (0:180:0.5);

\draw plot [domain=4:10] (\x, 4.41);
\draw plot [domain=-4:-10] (\x, 4.41);

\draw [->, line width=5pt] (0,-2) -- (0,7);
\draw [->, line width=5pt] (-10,0) -- (10,0);

\draw [inner color=blue!20, outer color= blue!50!black] (0,0.5) circle (0.5);

\end{tikzpicture}
\end{document}

Answer 1

連接不順暢的原因是角度不同。一種解決方案是使用to語法並指定out=和in=角度並調整它們，直到結果令人滿意。

\draw [black, out=110, in =85, distance=0.70cm] (-3,4.41) to (-4.0, 4.405); 

左側 1000% 縮放的結果：

右側的類似調整也應該有效。

代碼：

\documentclass[a4paper]{article}
\usepackage[english]{babel}
\usepackage{tikz}
\usepackage[]{xcolor}

\begin{document}

\begin{tikzpicture}
%\draw [help lines] (-10,0) grid [step=3] (10,10);

\draw plot [domain=0:3] (\x, {(0.7*\x)^2});
\draw plot [domain=-3:0] (\x, {(0.7*\x)^2});

\draw [red] (4,4.41) arc (0:180:0.5);
%\draw [blue] (-3,4.41) arc (0:180:0.5);

\draw [black, out=110, in =85, distance=0.70cm] (-3,4.41) to (-4.0, 4.405);


\draw plot [domain=4:10] (\x, 4.41);
\draw plot [domain=-4:-10] (\x, 4.41);


\draw [->, line width=5pt] (0,-2) -- (0,7);
\draw [->, line width=5pt] (-10,0) -- (10,0);

\draw [inner color=blue!20, outer color= blue!50!black] (0,0.5) circle (0.5);

\end{tikzpicture}
\end{document}