switch_axes(0);
  A:=point(3*i);
  B:=point(-2);
  C:=point(1-i);
  triangle(A,B,C);
  J:=inter(bissectrice(A,B,C),bissectrice(B,C,A))[0];
  //J:=centre(inscrit(A,B,C));
  segment(A,J);
  segment(B,J);
  segment(C,J);