Dear all, I stumbled upon some very weird behaviour of clipping in metafun/context. When I add some clipped pictures to currentpicture and draw something dashed, some subsequent lines will also be drawn dashed.
This behaviour only shows up with context but not with mptopdf or mpost. I attached a minimal example and the corresponding output of context and mptopdf. I tried context versions 2014.05.21 22:04 and 2014.10.29 17:47, but the result is the same in both. Tobias --
vardef mycircle =
save c ; picture c ; c := nullpicture ;
addto c contour fullcircle scaled 2mm ;
c
enddef ;
def a expr p =
path _p_ ; _p_ := p ;
a_impl
enddef ;
def a_impl text t =
begingroup
save c ; picture c ; c := mycircle ;
clip c to bbox c scaled 0.5 ;
addto currentpicture also c t ;
addto currentpicture doublepath _p_ t ;
endgroup
enddef ;
def b expr p =
path _p_ ; _p_ := p ;
b_impl
enddef ;
def b_impl text t =
begingroup
save c; picture c ; c := mycircle ;
addto currentpicture also c t ;
addto currentpicture doublepath _p_ t ;
endgroup
enddef ;
beginfig(1)
a (0,0) -- (1cm,0) dashed evenly ;
currentpicture := currentpicture shifted (2cm,0) ;
a (0,0) -- (1cm,0) ;
currentpicture := currentpicture shifted (-2cm, 0.5cm );
b (0,0) -- (1cm,0) dashed evenly ;
currentpicture := currentpicture shifted (2cm,0) ;
b (0,0) -- (1cm,0) ;
endfig ;
end
mwe-context.pdf
Description: Adobe PDF document
mwe-mptopdf.pdf
Description: Adobe PDF document
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