%% auteur : gh
100 setxunit
-1 3 setxrange
-1 2 setyrange
/cosa {pi 6 div Cos} def
/sina {pi 6 div Sin} def
/O {0 0} def
/A {cosa sina} def
/B {0 sina sub cosa} def
/M {2 cosa mul 2 sina mul} def
/Mx {2 cosa mul 0} def
/My {0 2 sina mul} def
tracerepere
16 setfontsize
setTimesItalic
(O) O dltext
bleu
1 setlinewidth
continu
[M] points
setTimesItalic
(M) M ultext
setSymbol
(q) .5 .12 cctext
(r) A {30} uctext
O M (-) line
/arrowangle -5 store
1 0 O A 0.4 (->) tripointarc
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