On Wed, Nov 25, 2009 at 5:45 AM, Curiouslearn wrote:

The code below shows a cyclic path that I am interested in creating (it is in red if you run the code). The example works fine as long as I have, u:=1cm, as in the code below. But if I replace it by , u:=0.6cm, there is no output. There is an error saying that paths 4 and 3 do not intersect. Is this a bug?

Thanks for your help.

\setuppapersize[letter][letter] \setuplayout[leftedge=0in,leftmargin=1in,leftmargindistance=0in,rightmargin=1in,rightmargindistance=0in,rightedge=0in,leftedgedistance=0in,rightedgedistance=0in,topspace=0.5in,width=6.5in,height=10in]

\setupcolors[state=start]

\starttext

\startuseMPgraphic{buildS22}        numeric u;        u := 1cm;        w:= 2pt;        path xaxis; path yaxis;        xaxis := (0,0)--(12,0) scaled u;        yaxis := (0,0)--(0,12) scaled u;        path stLine;        path Curve;        stLine :=                        function (1,"x","10-x",0,10,1) scaled u;        Curve :=                        function(1,"x","2+8/x",1,10,0.1) scaled u;        drawarrow xaxis withpen pencircle scaled w;        drawarrow yaxis withpen pencircle scaled w;        draw stLine withpen pencircle scaled w withcolor 0.5red;        draw Curve withpen pencircle scaled w withcolor 0.5green;        pair Lint[];        Lint[1]:=yaxis intersectionpoint stLine;        Lint[2]:=stLine intersectionpoint Curve;        Lint[3]:=reverse stLine intersectionpoint Curve;        Lint[4]:=stLine intersectionpoint xaxis;        path cyclicPath;        cyclicPath := buildcycle(Lint[1]--Lint[2],Curve,Lint[3]--Lint[4],reverse xaxis,yaxis);        draw cyclicPath withpen pencircle scaled 5pt withcolor red; \stopuseMPgraphic \useMPgraphic{buildS22}

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hm.. can you try with tracingall; cyclicPath := buildcycle(Lint[1]--Lint[2],Curve,Lint[3]--Lint[4],reverse xaxis,yaxis); ? -- luigi