Hi, > Le 25 déc. 2020 à 08:48, Jairo A. del Rio <jairoadelr...@gmail.com> a écrit : > > Hi, list. I've got a question about paths and intersections. The following: > > \starttext > \startMPpage > path p[]; > > p[1] = fullcircle scaled 2cm; > p[2] = unitsquare shifted (4cm,6cm); > > if (known (p[1] intersectionpoint p[2])): > > draw textext("yes"); > > else: > > draw textext("no"); > fi; > > \stopMPpage > \stoptext > > yields an error message: "The paths don't intersect". Is there a way to > intercept this error message and trigger an action instead? Thank you in > advance.
Instead of using « intersectionpoint » use « Intersectiontimes », this will give you the « time » of the intersection of the two paths. If the paths do not intersect, than the value is (-1,-1). So you could do something like: pair checkintersec ; checkintersec := p[1] intersectiontimes p[2] ; If xpart(checkintersec) <> -1 : draw textext("yes »); else: draw textext(« non »); fi; Fabrice. > > Best regards, > > Jairo > ___________________________________________________________________________________ > 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 > ___________________________________________________________________________________ ___________________________________________________________________________________ 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 ___________________________________________________________________________________