I have refactored my code to use withtransparency and separate parameters for
colors, sizes, transparency, etc. But I’m running into a problem. The
fillTransparency parameter is a pair primary (as can be seen from the show
command)
Here is a pretty minimum example (in reality there are multiple colors and
transparencies passed on):
\starttext
\startMPpage[instance=doublefun]
vardef Foo( expr w, h, fillColor, fillTransparency) =
show "FOO:", w, h, fillColor, fillTransparency;
save pic; picture pic;
save circ; path circ;
circ := (fullcircle xyscaled (h,h));
pic := image (
fill (circ shifted (w-h/2,-h/2)) withcolor fillColor withtransparency
fillTransparency;
);
pic
enddef;
pic := Foo( 150, 50, (0.686,1.000,1.000), (1,1.000));
draw pic;
\stopMPpage
\stoptext
and the result is:
metapost log > >> "FOO:"
metapost log > >> 150
metapost log > >> 50
metapost log > >> (0.68600000000000005,1,1)
metapost log > >> (1,1)
metapost log > ! Missing argument to withtransparency.
metapost log > <to be read again>
metapost log > ((1,1))
metapost log > <argument> ...0000005,1,1))withtransparency((1,1))
metapost log > ;
metapost log > image->...ture;currentpicture:=nullpicture;(TEXT3)
metapost log >
;currentpicture.if.str(SUF...
metapost log >
metapost log > Foo->...)withcolor(EXPR4)withtransparency(EXPR5);)
metapost log >
;pic.endgroup
metapost log > <*> ...o( 150, 50, (0.686,1.000,1.000), (1,1.000))
metapost log > ; draw pic;
;
What am I doing wrong here?
Thanks,
G
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