Hi,
I encounter some problems in the use of vlingrid() and hlingrid() macros. In the code below, we see that the grid is not correct.
Does the code can be improved ?
thank you,
Fabrice
\starttext
\startMPcode
path p ;
u := 2cm ; v:= 1cm ;
p := (-u,-5v)--(3u,-5v)--(3u,4v)--(-u,4v)--cycle ;
drawoptions(withpen pencircle scaled 0.5pt withcolor \MPcolor{mycolor});
draw vlingrid(-u,3u,u,4u,9v) shifted (0,-5v) ;
draw hlingrid(-5v,4v,v,9v,4u) shifted (-u,0) ;
drawoptions(withpen pencircle scaled 1pt) ;
drawarrow (-u,0)--(3u,0) ;
drawarrow (0,-5v)--(0,4v) ;
draw curvedfunction ("x", "3*x*x-5*x+1", -1, 3, 0.01) xyscaled (u,v) withcolor red ;
draw curvedfunction ("x", "-5*x+1", -1, 3, 0.01) xyscaled (u,v) withcolor blue ;
draw curvedfunction ("x", "7*x-11", -1, 3, 0.01) xyscaled (u,v) withcolor green ;
label.bot(btex $x$ etex,(2.97u,-0.1v)) ;
label.rt(btex $y$ etex,(0.01u,3.9v)) ;
label.llft("0",(0,0)) ;
dotlabel.urt("A",(0,v)) ;
dotlabel("",(u,-4v)) ;
label.rt("C",(1.02u,-4v)) ;
dotlabel.lrt("B",(2u,3v)) ;
label.bot("1",(u,0)) ;
label.lft("1",(0,v)) ;
clip currentpicture to p ;
\stopMPcode