* About the macro path intersectionpoint path with Metapost @ 2019-02-03 11:27 Fabrice Couvreur 2019-02-04 14:16 ` Fabrice L 0 siblings, 1 reply; 3+ messages in thread From: Fabrice Couvreur @ 2019-02-03 11:27 UTC (permalink / raw) To: mailing list for ConTeXt users [-- Attachment #1.1: Type: text/plain, Size: 636 bytes --] Hi, I would like to reproduce the attached figure. My problem is to create the points of intersection between the circles. It seems that my approach is not the right one. Thank you. Fabrice \starttext \startMPcode path p, q, r, b ; p:= fullcircle scaled 6cm ; q:= fullcircle scaled 4cm shifted (2.5cm,2cm) ; r:= fullcircle scaled 4cm shifted (-2.5cm,2cm); b:= fullcircle scaled 2cm shifted (0,-3cm); pair A, B ; A:= p intersectionpoint r ; B:= p intersectionpoint r ; path u ; u:= A--B--cycle ; draw p ; draw q ; draw r ; draw b ; draw u numberstriped (.25,15,5) withcolor magenta ; \stopMPcode \stoptext [-- Attachment #1.2: Type: text/html, Size: 1401 bytes --] [-- Attachment #2: Type: text/plain, Size: 493 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: About the macro path intersectionpoint path with Metapost 2019-02-03 11:27 About the macro path intersectionpoint path with Metapost Fabrice Couvreur @ 2019-02-04 14:16 ` Fabrice L 0 siblings, 0 replies; 3+ messages in thread From: Fabrice L @ 2019-02-04 14:16 UTC (permalink / raw) To: mailing list for ConTeXt users, Fabrice Couvreur [-- Attachment #1.1: Type: text/plain, Size: 2457 bytes --] Hi, I guess your problem is to find the two points of intersection between p and r ? If so, the problem is that intersectionpoint does return the same intersection when there is several, as it is the case here. So a quick solution that you can do is to find intersections for the two part. A drawing is simple than words ! here is the code to illustrate: Happy drawing ! F. \setupcolors[state=start] \starttext \startMPpage path p, q, r, b , u; p:= fullcircle scaled 6cm ; q:= fullcircle scaled 4cm shifted (2.5cm,2cm) ; r:= fullcircle scaled 4cm shifted (-2.5cm,2cm); b:= fullcircle scaled 2cm shifted (0,-3cm); pair A, B ; path rprime ; % Rprime is a a part of r (drawn in black to see it): rprime := r cutbefore point .5 along r; A:= p intersectionpoint r ; B:= p intersectionpoint rprime ; draw A withpen pencircle scaled .1in ; draw B withpen pencircle scaled .1in ; u:= A--B--cycle ; draw p withcolor green; draw q withcolor blue; draw rprime withpen pencircle scaled .05in withcolor black; draw r withcolor red; draw b withcolor magenta; draw u numberstriped (.25,15,5) withcolor magenta ; \stopMPpage \stoptext Le 3 février 2019 à 06:28:37, Fabrice Couvreur (fabrice1.couvreur@gmail.com) a écrit: Hi, I would like to reproduce the attached figure. My problem is to create the points of intersection between the circles. It seems that my approach is not the right one. Thank you. Fabrice \starttext \startMPcode path p, q, r, b ; p:= fullcircle scaled 6cm ; q:= fullcircle scaled 4cm shifted (2.5cm,2cm) ; r:= fullcircle scaled 4cm shifted (-2.5cm,2cm); b:= fullcircle scaled 2cm shifted (0,-3cm); pair A, B ; A:= p intersectionpoint r ; B:= p intersectionpoint r ; path u ; u:= A--B--cycle ; draw p ; draw q ; draw r ; draw b ; draw u numberstriped (.25,15,5) withcolor magenta ; \stopMPcode \stoptext ___________________________________________________________________________________ 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ [-- Attachment #1.2: Type: text/html, Size: 5156 bytes --] [-- Attachment #2: Type: text/plain, Size: 493 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 3+ messages in thread
[parent not found: <mailman.54.1549201746.1205.ntg-context@ntg.nl>]
* Re: About the macro path intersectionpoint path with Metapost [not found] <mailman.54.1549201746.1205.ntg-context@ntg.nl> @ 2019-02-03 23:26 ` Jeong Dal 0 siblings, 0 replies; 3+ messages in thread From: Jeong Dal @ 2019-02-03 23:26 UTC (permalink / raw) To: list ntg-context@ntg.nl ntg-context@ntg.nl ntg-context@ntg.nl ntg-context@ntg.nl Dear Fabrice, Metapost is great for drawiang figures but it is not easy for me to use it. > b:= fullcircle scaled 2cm shifted (0,-3cm); > pair A, B ; > A:= p intersectionpoint r ; > B:= p intersectionpoint r ; > path u ; > u:= A--B--cycle ; A and B are the same point. One of “r” should be changed to “q” or “b”. Then you can have a line. I also made similar errors many times too. Btw, is there any reason to add “—cycle”? Enjoy the drawing. Best regards, Dalyoung ___________________________________________________________________________________ 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://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________ ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-02-04 14:16 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-02-03 11:27 About the macro path intersectionpoint path with Metapost Fabrice Couvreur
2019-02-04 14:16 ` Fabrice L
[not found] <mailman.54.1549201746.1205.ntg-context@ntg.nl>
2019-02-03 23:26 ` Jeong Dal
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).