Bezier control points of a letter

\documentclass[border=10pt]{standalone}
\usepackage{asymptote}
\begin{document}
\begin{asy}[width=\the\linewidth,inline=true]
settings.outformat="pdf";
settings.render=0;
settings.prc=false;
size(7cm);
import fontsize;

defaultpen(fontsize(9pt));

real wd=0.6bp;
pen dotPen=deepblue+wd;
pen dotFill=dotPen;

pen dotPenB=blue+wd;
pen dotPenC=red+wd;

pen linePen=deepblue+wd;
pen fillPen=lightgreen+opacity(0.5);

pen thinLinePen=black+wd/2;


guide[] g;

g=texpath("$\Omega$");

filldraw(g,fillPen,linePen);

pair a,b,c,d;
pair labdir;
int pointNo=0;

for(int i=0;i<g.length;++i){
  for(int j=0;j<size(g[i])-1;++j){
    a=point(g[i],j);
    d=point(g[i],j+1);
    if(straight(g[i],j)){
      draw(a--d,thinLinePen);    
    }else{
      b=postcontrol(g[i],j);
      c=precontrol(g[i],j+1);
      draw(a--b--c--d,thinLinePen);
      dot(b,dotPenB,UnFill);
      dot(c,dotPenC,UnFill);
    }
    dot(a,dotPen,Fill(dotFill));
    labdir=rotate(-90)*dir(g[i],j);
    label("$\scriptsize "+string(pointNo)+"$",a,labdir);
    ++pointNo;
  }
  dot(d,dotPen,Fill(dotFill));
  labdir=rotate(-90)*dir(g[i],size(g[i])-1);
  label("$\scriptsize "+string(pointNo)+"$",d,labdir);
}
\end{asy}
\end{document}

Source: TeX.SE

Author: g.kov (License)

See also: Original Source