Hi Stefan, Thanks for your explanations: everything works as expected and your solution is very instructive for me. Later this weekend I'll put it on the wiki.
Have a nice day. Best regards: OK On 24 mars 2011, at 11:29, Stefan Müller wrote: > > > On 24.03.2011 10:57, Otared Kavian wrote: >> Hi Stefan, >> >> Thanks for the quick answer and solution! >> Your solution works perfectly in mkiv; however typesetting with mkii results >> in >> ! Undefined control sequence. >> l.3 \startMPdefinitions >> Is there a solution with mkii? > > Then just drop the MPdefinitions section and put the complete vardef before > your normal mp code in the MPcode section. That should work, I think. > >> May I ask one more question? >> In the macro you wrote >> Triangle((0cm,0cm), (5cm,0cm), 8cm, 6cm) >> one has to specify the double of the length of each side (because a unit >> circle in MetaPost is a circle having diameter one). Would it be possible to >> change slightly the lines > > Now that's strange... But I see what you mean. I didn't notice. > >> p := fullcircle scaled la shifted za ; >> q := fullcircle scaled lb shifted zb ; >> so that la and lb are replaced with their doubled values? I tried >> p := fullcircle scaled 2*la shifted za ; > > Yeah, you need parentheses here, because otherwise Metapost tries to scale by > 2 and then doesn't know how to multiply the result (the path "fullcircle > scaled 2") with "la". > > p := fullcircle scaled (2 * la) shifted za ; > q := fullcircle scaled (2 * lb) shifted zb ; > > >> but this does not work. >> >> Thanks for your attention: OK > > np, Stefan. > >> On 24 mars 2011, at 10:29, Stefan Müller wrote: >> >>> Hi, >>> >>> what about >>> >>> \startMPdefinitions >>> vardef Triangle(expr za, zb, la, lb) = >>> path p, q ; >>> pair zc ; >>> pickup pencircle scaled 2mm ; >>> drawdot za ; >>> drawdot zb ; >>> p := fullcircle scaled la shifted za ; >>> q := fullcircle scaled lb shifted zb ; >>> zc = p intersectionpoint q ; >>> drawdot zc ; >>> pickup pencircle scaled 1mm ; >>> za--zb--zc--cycle >>> enddef; >>> \stopMPdefinitions >>> >>> \starttext >>> \startMPcode >>> draw Triangle((0cm,0cm), (5cm,0cm), 8cm, 6cm) withcolor blue ; >>> \stopMPcode >>> \stoptext >>> >>> Stefan >>> >>> On 24.03.2011 09:59, Otared Kavian wrote: >>>> Hi all, >>>> >>>> I have a document in which I must draw several triangles for which two >>>> summits, say z0, z1, and the length of the two other sides are known, so >>>> that the third summit, say z2, is completly determined. >>>> In order to draw one triangle the following works fine: >>>> >>>> \setupcolors[state=start] >>>> \starttext >>>> \startMPcode >>>> z0 = (0cm,0cm) ; >>>> z1 = (5cm,0cm) ; >>>> path p, q ; >>>> pickup pencircle scaled 2mm ; >>>> drawdot z0 ; >>>> drawdot z1 ; >>>> p := halfcircle scaled 8 cm ; % twice the length of the second side at >>>> z0 >>>> p := p shifted z0 ; >>>> q := halfcircle scaled 6 cm ; % twice the length of the second side at >>>> z1 >>>> q := q shifted z1 ; >>>> z2 = p intersectionpoint q ; >>>> drawdot z2 ; >>>> pickup pencircle scaled 1mm ; >>>> draw z0--z1--z2--cycle withcolor blue ; >>>> \stopMPcode >>>> \stoptext >>>> >>>> However I would like to have a macro, for instance named Triangle, which >>>> accepts four arguments z0,z1, length_1, length_2, so that in a MetaPost >>>> code i can use >>>> draw Triangle(z0,z1, 4, 3) withcolor blue ; >>>> in order to draw the above triangle. >>>> Has anyone any idea about how to do this? >>>> >>>> Thanks in advance for your help: OK >>>> ___________________________________________________________________________________ >>>> 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 >>>> ___________________________________________________________________________________ >>>> >>> ___________________________________________________________________________________ >>> 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 >>> ___________________________________________________________________________________ >> >> %%%%%%%%%%%%%%%%%% >> Otared Kavian >> Département de Mathématiques >> Université de Versailles Saint-Quentin >> Bâtiment Fermat >> 45 avenue des Etats Unis >> 78035 Versailles cedex >> >> Téléphone: +33 1 39 25 46 42 >> Secrétariat: +33 1 39 25 46 44 >> Secrétariat: +33 1 39 25 46 46 >> >> e-mail: otared.kav...@math.uvsq.fr >> >> >> >> >> ___________________________________________________________________________________ >> 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 >> ___________________________________________________________________________________ >> > ___________________________________________________________________________________ > 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 > ___________________________________________________________________________________ %%%%%%%%%%%%%%%%%% Otared Kavian Département de Mathématiques Université de Versailles Saint-Quentin Bâtiment Fermat 45 avenue des Etats Unis 78035 Versailles cedex Téléphone: +33 1 39 25 46 42 Secrétariat: +33 1 39 25 46 44 Secrétariat: +33 1 39 25 46 46 e-mail: otared.kav...@math.uvsq.fr
___________________________________________________________________________________ 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 ___________________________________________________________________________________
