我在 里画了赵爽弦图,不过方法比较笨.下面用旋转和平移画出那四个三角形.得到的图像和里的图像一样.在桌面建立test.asy文档,文档内容如下:

 

1 import settings; 2  settings.tex = "pdflatex"; 3  pdfviewer="/usr/bin/okular"; 4  outformat="pdf"; 5  size(400); 6  texpreamble("\usepackage{CJKutf8}\AtBeginDocument{\begin{CJK}{UTF8}{gbsn}}\AtEndDocument{\clearpage\end{CJK}}"); 7  import math; 8  add( scale(1cm) * grid(7, 7, heavygray) ); 9  add( shift(0,3cm) * rotate(-aTan(3/4)) * scale(1cm) * grid(5, 5, heavygray) );10  fill( box((3cm,3cm), (4cm,4cm)), opacity(0.3)+yellow );11  guide zhushi=((4cm,0)-- (4cm,3cm) -- (0,3cm) -- cycle);12  filldraw (zhushi^^shift(7cm,0)*rotate(90)*zhushi^^shift(7cm,0)*rotate(90)*shift(7cm,0)*rotate(90)*zhushi^^shift(7cm,0)*rotate(90)*shift(7cm,0)*rotate(90)*shift(7cm,0)*rotate(90)*zhushi,fillpen=opacity(0.1)+red, drawpen=red+0.5mm);13  label("朱实", (2cm,4cm),red);14  label("黄实", (3.5cm,3.5cm),yellow);15  label("弦实", (5cm,4cm),orange);16  label( Label("勾三",Rotate(S)), (4cm,0)--(4cm,3cm), LeftSide );17  label( Label("股四",Rotate(E)), (4cm,3cm)--(0,3cm), LeftSide );18  label( Label("弦五",Rotate((4,-3))), (0,3cm)--(4cm,0), LeftSide );

然后在终端里输入asy -V -f  pdf ~/Desktop/test  即可生成图像.