三合罗盘

本片与 Sanhe Luopan 使用同一份 TikZ 代码，并与「作图纸」的其他几支短片共用作图引擎；盘上的字依据同一组数值另行排版，跟着画笔一格一格显现。复制的代码会附带一行 \tikzset，用于声明本图专用的键；粘贴到加载了 TikZ 宏包的 LaTeX 文档中即可编译。

1% title: 三合盘 · 十六层2% 方位角自子起顺时针；纸上上南下北，角 = 270 - 方位角3\begin{tikzpicture}4% 盘照 1 cm 一单位排，整个缩到纸上5\begin{scope}[scale=0.45]6 7% 第 1 层 天池：海底线，北端两点8\draw[compass] (0,0) circle (1);9\draw[signal, thick] (0,-0.9) -- (0,0.9);10\foreach \x in {-.13,.13} \fill[signal] (\x,-0.72) circle (.035);11 12% 八宫：八条界线，每宫 45°13\foreach \b in {22.5,67.5,...,337.5} \draw[help lines, dashed] ({270-\b}:1) -- ({270-\b}:11.76);14 15% 第 2 层 先天八卦16\draw (0,0) circle (2);17\foreach \b in {22.5,67.5,...,337.5} \draw ({270-\b}:1) -- ({270-\b}:2);18\foreach \a/\r/\g in {0/1.2/0,0/1.37/0,0/1.54/0,45/1.2/0,45/1.37/0,45/1.54/0.05,90/1.2/0,90/1.37/0.05,90/1.54/0,135/1.2/0,135/1.37/0.05,135/1.54/0.05,-45/1.2/0.05,-45/1.37/0,-45/1.54/0,-90/1.2/0.05,-90/1.37/0,-90/1.54/0.05,-135/1.2/0.05,-135/1.37/0.05,-135/1.54/0,180/1.2/0.05,180/1.37/0.05,180/1.54/0.05}19  \draw[thick, rotate=\a] (-.2,\r) -- (-\g,\r) (\g,\r) -- (.2,\r);20 21% 第 3 层 龙上八煞22\draw (0,0) circle (2.5);23\foreach \b in {22.5,67.5,...,337.5} \draw ({270-\b}:2) -- ({270-\b}:2.5);24 25% 第 4 层 八路黄泉26\draw (0,0) circle (3.12);27\foreach \b in {7.5,22.5,...,352.5} \draw ({270-\b}:2.5) -- ({270-\b}:3.12);28 29% 第 5 层 坐山九星30\draw (0,0) circle (3.84);31\foreach \b in {7.5,22.5,...,352.5} \draw ({270-\b}:3.12) -- ({270-\b}:3.84);32 33% 第 6 层 地盘正针二十四山34\draw[thick] (0,0) circle (4.72);35\foreach \b in {7.5,22.5,...,352.5} \draw[semithick] ({270-\b}:3.84) -- ({270-\b}:4.72);36 37% 第 7 层 穿山七十二龙38\draw (0,0) circle (5.5);39\foreach \b in {2.5,7.5,...,357.5} \draw ({270-\b}:4.72) -- ({270-\b}:5.5);40 41% 第 8 层 正针一百二十分金42\draw (0,0) circle (6.22);43\foreach \b in {1.5,4.5,...,358.5} \draw ({270-\b}:5.5) -- ({270-\b}:6.22);44 45% 第 9 层 人盘中针二十四山46\draw (0,0) circle (6.78);47\foreach \b in {0,15,...,345} \draw ({270-\b}:6.22) -- ({270-\b}:6.78);48\draw[help lines, <->] (270:6.5) arc (270:277.5:6.5) node[midway, below right, font=\scriptsize] {$7.5^\circ$};49 50% 第 10 层 透地六十龙51\draw (0,0) circle (7.56);52\foreach \b in {1.5,7.5,...,355.5} \draw ({270-\b}:6.78) -- ({270-\b}:7.56);53 54% 第 11 层 天盘缝针二十四山55\draw (0,0) circle (8.12);56\foreach \b in {0,15,...,345} \draw ({270-\b}:7.56) -- ({270-\b}:8.12);57\draw[help lines, <->] (270:7.84) arc (270:262.5:7.84) node[midway, below left, font=\scriptsize] {$7.5^\circ$};58 59% 第 12 层 双山三合五行60\draw (0,0) circle (8.54);61\foreach \b in {15,45,...,345} \draw ({270-\b}:8.12) -- ({270-\b}:8.54);62 63% 第 13 层 缝针一百二十分金64\draw (0,0) circle (9.26);65\foreach \b in {0,3,...,357} \draw ({270-\b}:8.54) -- ({270-\b}:9.26);66 67% 第 14 层 周天二十八宿68\draw (0,0) circle (9.98);69\foreach \b in {0,9.117,19.959,26.858,49.281,58.645,76.386,82.3,87.967,103.984,113.593,126.16,144.641,164.6,182.094,188.747,202.053,204.517,234.333,243.696,244.189,260.452,271.294,286.324,298.891,316.632,326.242,344.23} \draw ({270-\b}:9.26) -- ({270-\b}:9.98);70\foreach \d in {1,...,15} \draw[very thin] ({270+\d*0.986}:9.26) -- ({270+\d*0.986}:9.36); % 危 16 度71\foreach \d in {1,...,18} \draw[very thin] ({285.77+\d*0.986}:9.26) -- ({285.77+\d*0.986}:9.36); % 室 18 度少72\foreach \d in {1,...,9} \draw[very thin] ({303.758+\d*0.986}:9.26) -- ({303.758+\d*0.986}:9.36); % 壁 9 度太73\foreach \d in {1,...,17} \draw[very thin] ({313.368+\d*0.986}:9.26) -- ({313.368+\d*0.986}:9.36); % 奎 18 度74\foreach \d in {1,...,12} \draw[very thin] ({331.109+\d*0.986}:9.26) -- ({331.109+\d*0.986}:9.36); % 娄 12 度太75\foreach \d in {1,...,15} \draw[very thin] ({343.676+\d*0.986}:9.26) -- ({343.676+\d*0.986}:9.36); % 胃 15 度少76\foreach \d in {1,...,10} \draw[very thin] ({358.706+\d*0.986}:9.26) -- ({358.706+\d*0.986}:9.36); % 昴 11 度77\foreach \d in {1,...,16} \draw[very thin] ({369.548+\d*0.986}:9.26) -- ({369.548+\d*0.986}:9.36); % 毕 16 度半78\foreach \d in {1,...,9} \draw[very thin] ({386.304+\d*0.986}:9.26) -- ({386.304+\d*0.986}:9.36); % 参 9 度半79\foreach \d in {1,...,30} \draw[very thin] ({395.667+\d*0.986}:9.26) -- ({395.667+\d*0.986}:9.36); % 井 30 度少80\foreach \d in {1,...,2} \draw[very thin] ({425.483+\d*0.986}:9.26) -- ({425.483+\d*0.986}:9.36); % 鬼 2 度半81\foreach \d in {1,...,13} \draw[very thin] ({427.947+\d*0.986}:9.26) -- ({427.947+\d*0.986}:9.36); % 柳 13 度半82\foreach \d in {1,...,6} \draw[very thin] ({441.253+\d*0.986}:9.26) -- ({441.253+\d*0.986}:9.36); % 星 6 度太83\foreach \d in {1,...,17} \draw[very thin] ({447.906+\d*0.986}:9.26) -- ({447.906+\d*0.986}:9.36); % 张 17 度太84\foreach \d in {1,...,20} \draw[very thin] ({465.4+\d*0.986}:9.26) -- ({465.4+\d*0.986}:9.36); % 翼 20 度少85\foreach \d in {1,...,18} \draw[very thin] ({485.359+\d*0.986}:9.26) -- ({485.359+\d*0.986}:9.36); % 轸 18 度太86\foreach \d in {1,...,12} \draw[very thin] ({503.84+\d*0.986}:9.26) -- ({503.84+\d*0.986}:9.36); % 角 12 度太87\foreach \d in {1,...,9} \draw[very thin] ({516.407+\d*0.986}:9.26) -- ({516.407+\d*0.986}:9.36); % 亢 9 度太88\foreach \d in {1,...,16} \draw[very thin] ({526.016+\d*0.986}:9.26) -- ({526.016+\d*0.986}:9.36); % 氐 16 度少89\foreach \d in {1,...,5} \draw[very thin] ({542.033+\d*0.986}:9.26) -- ({542.033+\d*0.986}:9.36); % 房 5 度太90\foreach \d in {1,...,5} \draw[very thin] ({547.7+\d*0.986}:9.26) -- ({547.7+\d*0.986}:9.36); % 心 6 度91\foreach \d in {1,...,17} \draw[very thin] ({553.614+\d*0.986}:9.26) -- ({553.614+\d*0.986}:9.36); % 尾 18 度92\foreach \d in {1,...,9} \draw[very thin] ({571.355+\d*0.986}:9.26) -- ({571.355+\d*0.986}:9.36); % 箕 9 度半93\foreach \d in {1,...,22} \draw[very thin] ({580.719+\d*0.986}:9.26) -- ({580.719+\d*0.986}:9.36); % 斗 22 度太94\foreach \d in {1,...,6} \draw[very thin] ({603.142+\d*0.986}:9.26) -- ({603.142+\d*0.986}:9.36); % 牛 7 度95\foreach \d in {1,...,10} \draw[very thin] ({610.041+\d*0.986}:9.26) -- ({610.041+\d*0.986}:9.36); % 女 11 度96\foreach \d in {1,...,9} \draw[very thin] ({620.883+\d*0.986}:9.26) -- ({620.883+\d*0.986}:9.36); % 虚 9 度少97 98% 第 15 层 二十四节气99\draw (0,0) circle (10.72);100\foreach \b in {7.5,22.5,...,352.5} \draw ({270-\b}:9.98) -- ({270-\b}:10.72);101 102% 第 16 层 周天三百六十度103\draw[thick] (0,0) circle (11.46);104\foreach \b in {0,1,...,359} \draw[very thin] ({270-\b}:11.34) -- ({270-\b}:11.46);105\foreach \b in {0,5,...,355} \draw ({270-\b}:11.26) -- ({270-\b}:11.46);106\foreach \b in {0,10,...,350} \draw ({270-\b}:11.16) -- ({270-\b}:11.46);107\end{scope}108 109% 盘边：直径（纸上的长度）110\draw[|<->|] (-5.157,-5.457) -- (5.157,-5.457) node[midway, below] {$10.314$};111 112\end{tikzpicture}