我正在尝试重建TikZ的欧元符号。我的基本指南是 http://upload.wikimedia.org/wikipedia/commons/5/57/Euro_Construction.svg
我遇到的问题是我到目前为止可以计算所有交叉点,但是 我无法指示tikz从例如A到K.虽然我可以画画 这个弧使用剪切,据我所知,不会产生连接 路径。我试图避免手工计算所有角度。
对于SVG支持,有\ pgfpatharcto,虽然这似乎有点矫枉过正, 它可能会完成这项工作,这将引导我进入下一个问题:如何从中获取\ pgfpoints 命名坐标(一)在\ pgfpatharcto中使用它们?更好的是: 我怎么能在svg路径数据中使用命名坐标?基本上就是这样 减少写作的问题 \ draw ...(B) - (A)svg“a 6 6 0 0 0(K)” - (O)......;
我已经拥有的是:
Alt text http://img.skitch.com/20101204-ef3a3xwh2reqis67phqenmuxa2.png
上传了Skitch
使用:
\begin{tikzpicture}
\draw[step=5mm, gray, very thin] (-7.5,-7.5) grid (7.5,7.5); % grid
% inner and outer circle to be used for the intersections
\path[name path=outer] (0,0) circle[radius=6];
\path[name path=inner] (0,0) circle[radius=5];
% upper, semi upper, semi lower and lower horizontal lines.
\path[name path=U] (-7.5,1.5) -- (4,1.5);
\path[name path=u] (-7.5,0.5) -- (4,0.5);
\path[name path=l] (-7.5,-0.5) -- (4,-0.5);
\path[name path=L] (-7.5,-1.5) -- (4,-1.5);
% the upwards slope and the vertical line at +-40 deg at 5 units.
\path[name path=slope] ($(0,-6)!0.25!(40:5)$) -- ($(0,-6)!1.25!(40:5)$);
\path[name path=fourty] ($(40:5)!0.5!(-40:5)$) -- ($(40:5)!1.25!(-40:5)$);
% naming all the intersections.
\path[name intersections={of=outer and slope, by={A}}];
\path[name intersections={of=inner and slope, by={B}}];
\path[name intersections={of=U and slope, by={C}}];
\path[name intersections={of=u and slope, by={D}}];
\path[name intersections={of=l and slope, by={E}}];
\path[name intersections={of=L and slope, by={F}}];
\path[name intersections={of=U and inner, by={G}}];
\path[name intersections={of=u and inner, by={H}}];
\path[name intersections={of=l and inner, by={I}}];
\path[name intersections={of=L and inner, by={J}}];
\path[name intersections={of=U and outer, by={K}}];
\path[name intersections={of=u and outer, by={L}}];
\path[name intersections={of=l and outer, by={M}}];
\path[name intersections={of=L and outer, by={N}}];
\coordinate (O) at ($(-7.5,0.5)+(C)-(D)$);
\coordinate (P) at (-7.5,0.5);
\coordinate (Q) at ($(-7.5,-1.5)+(E)-(F)$);
\coordinate (R) at (-7.5,-1.5);
\path[name intersections={of=fourty and inner, by={S}}];
\path[name intersections={of=fourty and outer, by={T}}];
% drawing the intersections
\foreach \p in {A,...,T} \fill[red] (\p) circle (2pt) node[above left,black] {\footnotesize\p};
% constructing the path
\draw (A) -- (B) (G) -- (C) -- (D) -- (H) (I) -- (E) -- (F) -- (J) (S) -- (T) (N) -- (R) -- (Q) -- (M) (L) -- (P) -- (O) -- (K);
% missing segments
\draw[gray,dashed] circle[radius=5] circle[radius=6];
\end{tikzpicture}
更新(在pgf maling列表的帮助下,我们得出了以下解决方案)
\draw[thick,fill] let \p1=(A), \p2=(K), \p3=(L), \p4=(M), \p5=(N), \p6=(T),
\p7=(S), \p8=(J), \p9=(I), \p{10}=(H), \p{11}=(G), \p{12}=(B),
\n{aA}={atan2(\x1,\y1)}, \n{aK}={atan2(\x2,\y2)},
\n{aL}={atan2(\x3,\y3)}, \n{aM}={360+atan2(\x4,\y4)},
\n{aN}={360+atan2(\x5,\y5)}, \n{aT}={360+atan2(\x6,\y6)},
\n{aS}={360+atan2(\x7,\y7)}, \n{aJ}={360+atan2(\x8,\y8)},
\n{aI}={360+atan2(\x9,\y9)}, \n{aH}={atan2(\x{10},\y{10})},
\n{aG}={atan2(\x{11},\y{11})}, \n{aB}={atan2(\x{12},\y{12})}
in (A) arc (\n{aA}:\n{aK}:6) -- (O) -- (P)
-- (L) arc (\n{aL}:\n{aM}:6) -- (Q) -- (R)
-- (N) arc (\n{aN}:\n{aT}:6)
-- (S) arc (\n{aS}:\n{aJ}:5) -- (F) -- (E)
-- (I) arc (\n{aI}:\n{aH}:5) -- (D) -- (C)
-- (G) arc (\n{aG}:\n{aB}:5) -- cycle;
这让TikZ可以计算出点的角度,从而可以简单地调用弧线。 对我来说棘手的部分是数学引擎的使用。文档过于庞大 我错过了使用花括号为数学引擎分配新值的部分。
答案 0 :(得分:1)
允许我在TikZ中只画了1个(算上一个)数字,
\draw (A) arc (Aangle:Kangle:outerRadius)
其中outerRadius
似乎是6而Aangle
似乎是40度,我不会立即在提供的数据中看到Kangles(但是这个值完全受约束...看起来像arcsin (1.5 / 6))。