Re: [NTG-context] Strange behavior with Metapost

[Fabrice]

It works. But how to choose not to avoid this problem (/10 or /20 or ....) ?
Another little problem: if I use

" setbounds currentpicture to boundingbox (((xmin,ymin) --(xmax,ymax)) 
scaled u) ; "

the images are not adjusted to the BoundingBox.
So I'm back to my original idea.
Fabrice

\midaligned{%
\startcombination[4*1]
{%
\startMPcode
     input hvdm;
     l:=2.8mm; r:=0.6; alfa:=45; beta:=0; gamma:=0;
     defineDefaultArrow (l, r, alfa, beta, gamma);
     numeric xmin, xmax, ymin, ymax;
     xmin := -2; xmax :=4; ymax :=5 ;ymin:=-1; u := 0.7cm;
     pickup pencircle scaled 1pt ;
     drawarrow ((xmin,0) -- (xmax,0)) scaled u;
     drawarrow ((0,ymin) -- (0,ymax)) scaled u;
     draw tightfunction ("x", "-2*(x-1)*(x-1)+2", xmin, xmax, 
(xmax-xmin)/20)
     scaled u;
     path screen;
screen=(xmin,ymin)*u--(xmax,ymin)*u--(xmax,ymax)*u--(xmin,ymax)*u--cycle;
     clip currentpicture to screen;
\stopMPcode
}{1.}
{%
\startMPcode
     input hvdm;
     l:=2.8mm; r:=0.6; alfa:=45; beta:=0; gamma:=0;
     defineDefaultArrow (l, r, alfa, beta, gamma);
     numeric xmin, xmax, ymin, ymax;
     xmin := -2; xmax :=4; ymax :=5 ;ymin:=-1; u := 0.7cm;
     pickup pencircle scaled 1pt ;
     drawarrow ((xmin,0) -- (xmax,0)) scaled u;
     drawarrow ((0,ymin) -- (0,ymax)) scaled u;
     draw tightfunction ("x", "0.5*(x-1)*(x-1)+2", xmin, xmax, 
(xmax-xmin)/20)
     scaled u;
     path screen;
screen=(xmin,ymin)*u--(xmax,ymin)*u--(xmax,ymax)*u--(xmin,ymax)*u--cycle;
     clip currentpicture to screen;
\stopMPcode
}
{2.}
{%
\startMPcode
     input hvdm;
     l:=2.8mm; r:=0.6; alfa:=45; beta:=0; gamma:=0;
     defineDefaultArrow (l, r, alfa, beta, gamma);
     numeric xmin, xmax, ymin, ymax;
     xmin := -2; xmax :=4; ymax :=5 ;ymin:=-1; u := 0.7cm;
     pickup pencircle scaled 1pt ;
     drawarrow ((xmin,0) -- (xmax,0)) scaled u;
     drawarrow ((0,ymin) -- (0,ymax)) scaled u;
     draw tightfunction ("x", "-0.5*(x-1)*(x-1)+2", xmin, xmax, 
(xmax-xmin)/20)
     scaled u;
     path screen;
screen=(xmin,ymin)*u--(xmax,ymin)*u--(xmax,ymax)*u--(xmin,ymax)*u--cycle;
     clip currentpicture to screen;
\stopMPcode
}
{3.}
{%
\startMPcode
     input hvdm;
     l:=2.8mm; r:=0.6; alfa:=45; beta:=0; gamma:=0;
     defineDefaultArrow (l, r, alfa, beta, gamma);
     numeric xmin, xmax, ymin, ymax;
     xmin := -2; xmax :=4; ymax :=5 ;ymin:=-1; u := 0.7cm;
     pickup pencircle scaled 1pt ;
     drawarrow ((xmin,0) -- (xmax,0)) scaled u;
     drawarrow ((0,ymin) -- (0,ymax)) scaled u;
     draw tightfunction ("x", "2*(x-1)*(x-1)+2", xmin, xmax, 
(xmax-xmin)/20)
     scaled u;
     path screen;
screen=(xmin,ymin)*u--(xmax,ymin)*u--(xmax,ymax)*u--(xmin,ymax)*u--cycle;
     clip currentpicture to screen;
\stopMPcode}
{4.}
\stopcombination}

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