On 11/3/2016 5:09 PM, Mikael P. Sundqvist wrote:
Dear list,
the example below has shifted axes. I updated to the latest standalone
earlier today. The problem was not present some weeks ago.
In particular look at the red line that should start from the origin...
\starttext
\startMPpage
ut:=1.0cm;
ux:=0.6cm;
vardef diffp(expr riktn) =
((-1,0)--(1,0)) rotatedaround (origin,angle(ut,riktn*ux))
enddef;
path taxel,xaxel;
taxel:=((-1.4,0)--(5.4,0));
xaxel:=((0,-1.4)--(0,4.6));
drawarrow taxel xyscaled(ut,ux);
drawarrow xaxel xyscaled(ut,ux);
label.bot("$t$", (point length(taxel) of taxel) xyscaled(ut,ux));
label.lft("$P$", (point length(xaxel) of xaxel) xyscaled(ut,ux));
draw image(
vardef fun(expr t, x) = x*(3-x) enddef;
for i=-1 step 0.5 until 5 :
for j=-1 step 0.5 until 4 :
ii:=i;
jj:=j;
draw diffp(fun(ii,jj)) scaled 2bp shifted (ii*ut,jj*ux);
endfor;
endfor;
draw function (2, "x", "3/(1+2*exp(-3*x))" ,-1, 5, 1/5) xyscaled (ut,ux);
draw (0,0)--(3,3) xyscaled(ut,ux) withcolor darkred;
);
\stopMPpage
\stoptext
I'll fix it. Alan: we really need this one then:
vardef image@#(text t) =
save currentpicture ;
picture currentpicture ;
currentpicture := nullpicture ;
t ;
currentpicture
if str @# <> "" :
shifted (
mfun_labxf@# * lrcorner currentpicture
+ mfun_labyf@# * ulcorner currentpicture
+ (1-mfun_labxf@#-mfun_labyf@#) * llcorner currentpicture
)
fi
enddef ;
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