On 10/31/2014 9:58 AM, Tobias Columbus wrote:
Hi again,
I tried my example from yesterday in context with metapost format, but the output still differs from what mptopdf produces.
While doing that, I noticed that the mpost format is currently not usable out of the box:
\startMPcode{metapost} draw (0,0) -- (1cm,0) ; \stopMPcode
produces the error message
\startMPcode draw (0,0) -- (1cm,0) ; \stopMPcode why the {metapost}
mfun_first_run true ! Equation cannot be performed (numeric=boolean).
and the same for 'mfun_trial_run'. Simply adding
boolean mfun_trial_run, mfun_first_run ;
to texmf/metapost/base/mpost.mp resolved the issue for me. However, that may introduce other complications that I have no idea of.
Tobias
On Thu, Oct 30, 2014 at 08:56:34PM +0100, Tobias Columbus wrote:
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
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