doc/UserGuide/mesh/assets/overlappingPatches.asy

   1 settings.render = -2;
   2 size(9cm);
   3
   4 path patch1 = (0,0)--E+0.3N--0.9E+N--0.3W+0.8N--cycle;
   5 path patch2 = 0.5E+0.2N--0.9E+0.4N--0.5E+1.2N--N--cycle;
   6 filldraw(patch1, lightgray, black);
   7 filldraw(patch2, lightgray, black);
   8 pair[] cuts = intersectionpoints(patch1, patch2);
   9 filldraw(0.5E+0.2N--0.9E+0.4N--cuts[0]--cuts[1]--cycle, gray, black);
  10
  11 label("patch 1", 0.3NE);
  12 label("patch 2", N+0.3E);
  13
  14 real s = 0.06;
  15 filldraw(shift(0.1S)*scale(s)*unitsquare, lightgray);
  16 label("region of internal connection faces", 0.1S+s*E, NE);
  17 filldraw(shift(0.2S)*scale(s)*unitsquare, gray);
  18 label("region of external bounary faces", 0.2S+s*E, NE);