* Square pens and dash pattern
@ 2016-04-05 23:44 Aditya Mahajan
2016-04-06 0:59 ` Alan BRASLAU
2016-04-06 7:52 ` Hans Hagen
0 siblings, 2 replies; 4+ messages in thread
From: Aditya Mahajan @ 2016-04-05 23:44 UTC (permalink / raw)
To: mailing list for ConTeXt users
Hi,
There appears to be a metapost bug with square pens and dash patterns:
\starttext
\startMPcode
pickup pencircle scaled 1bp;
drawarrow origin -- (5cm, 4cm) dashed evenly;
pickup pensquare scaled 1bp;
drawarrow origin -- (5cm,-4cm) dashed evenly;
\stopMPcode
\stoptext
Note that the second arrow is not dashed at all! This is not due to the
thick pen.
Aditya
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^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Square pens and dash pattern 2016-04-05 23:44 Square pens and dash pattern Aditya Mahajan @ 2016-04-06 0:59 ` Alan BRASLAU 2016-04-06 7:52 ` Hans Hagen 1 sibling, 0 replies; 4+ messages in thread From: Alan BRASLAU @ 2016-04-06 0:59 UTC (permalink / raw) To: Aditya Mahajan; +Cc: mailing list for ConTeXt users On Tue, 5 Apr 2016 19:44:33 -0400 Aditya Mahajan <adityam@umich.edu> wrote: > There appears to be a metapost bug with square pens and dash patterns: I confirm that dashed anything with a pensquare does not dash. Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Square pens and dash pattern 2016-04-05 23:44 Square pens and dash pattern Aditya Mahajan 2016-04-06 0:59 ` Alan BRASLAU @ 2016-04-06 7:52 ` Hans Hagen 2016-04-06 8:01 ` luigi scarso 1 sibling, 1 reply; 4+ messages in thread From: Hans Hagen @ 2016-04-06 7:52 UTC (permalink / raw) To: ntg-context On 4/6/2016 1:44 AM, Aditya Mahajan wrote: > Hi, > > There appears to be a metapost bug with square pens and dash patterns: > > \starttext > > \startMPcode > pickup pencircle scaled 1bp; > drawarrow origin -- (5cm, 4cm) dashed evenly; > pickup pensquare scaled 1bp; > drawarrow origin -- (5cm,-4cm) dashed evenly; > \stopMPcode > > \stoptext > > Note that the second arrow is not dashed at all! This is not due to the > thick pen. pencircles make simple round pens that are mapped directly onto ps primitives and there dashing applies (dashing is just passing data to the backend) ... afaik other penshapes can result in a filled path so no dashing applies (but mp master luigi will tripple check it in the source for you so he might come up with another answer) (and after that, as mathematical challenge, alan will write a mp macro that fakes the dashing) Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl ----------------------------------------------------------------- ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Square pens and dash pattern 2016-04-06 7:52 ` Hans Hagen @ 2016-04-06 8:01 ` luigi scarso 0 siblings, 0 replies; 4+ messages in thread From: luigi scarso @ 2016-04-06 8:01 UTC (permalink / raw) To: mailing list for ConTeXt users [-- Attachment #1.1: Type: text/plain, Size: 1940 bytes --] On Wed, Apr 6, 2016 at 9:52 AM, Hans Hagen <pragma@wxs.nl> wrote: > On 4/6/2016 1:44 AM, Aditya Mahajan wrote: > >> Hi, >> >> There appears to be a metapost bug with square pens and dash patterns: >> >> \starttext >> >> \startMPcode >> pickup pencircle scaled 1bp; >> drawarrow origin -- (5cm, 4cm) dashed evenly; >> pickup pensquare scaled 1bp; >> drawarrow origin -- (5cm,-4cm) dashed evenly; >> \stopMPcode >> >> \stoptext >> >> Note that the second arrow is not dashed at all! This is not due to the >> thick pen. >> > > pencircles make simple round pens that are mapped directly onto ps > primitives and there dashing applies (dashing is just passing data to the > backend) ... afaik other penshapes can result in a filled path so no > dashing applies > > (but mp master luigi will tripple check it in the source for you so he > might come up with another answer) > > (and after that, as mathematical challenge, alan will write a mp macro > that fakes the dashing) > > Hans > > # cat test-square.mp test-circle.mp beginfig(1); tracingall; %pickup pencircle scaled 1bp; %drawarrow origin -- (5cm, 4cm) dashed evenly; pickup pensquare scaled 1bp; drawarrow origin -- (5cm,-4cm) dashed evenly; endfig; end. beginfig(1); tracingall; pickup pencircle scaled 1bp; drawarrow origin -- (5cm, 4cm) dashed evenly; %pickup pensquare scaled 1bp; %drawarrow origin -- (5cm,-4cm) dashed evenly; endfig; end. # mpost test-square.mp says, near the end, Edge structure at line 7 (just shipped out): Filled pen stroke : (0,0)..controls (47.24408,-37.79527) and (94.48817,-75.59053) ..(141.73225,-113.3858) dashed (on 3 off 3) shifted 0 (this will be ignored) while # mpost test-circle.mp says Edge structure at line 7 (just shipped out): Filled pen stroke : (0,0)..controls (47.24408,37.79527) and (94.48817,75.59053) ..(141.73225,113.3858) dashed (on 3 off 3) shifted 0 So it doesn't look a mpost bug . -- luigi [-- Attachment #1.2: Type: text/html, Size: 3490 bytes --] [-- Attachment #2: Type: text/plain, Size: 485 bytes --] ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2016-04-06 8:01 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2016-04-05 23:44 Square pens and dash pattern Aditya Mahajan 2016-04-06 0:59 ` Alan BRASLAU 2016-04-06 7:52 ` Hans Hagen 2016-04-06 8:01 ` luigi scarso
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