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diff --git a/Master/texmf-dist/doc/metapost/featpost/example/standard/positivecharge.mp b/Master/texmf-dist/doc/metapost/featpost/example/standard/positivecharge.mp
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+++ b/Master/texmf-dist/doc/metapost/featpost/example/standard/positivecharge.mp
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+% positivecharge.mp
+% L. Nobre G.
+% 2004
+
+%input featpost3Dplus2D;
+
+beginfig(1);
+ numeric size, num, i, j, coos[];
+ string comm, bray;
+ color fro, tip;;
+ size = 1.5;
+ num = 70;
+ bray = "0.05";
+ draw rp(black)--rp((size,0,0))--rp((size,size,0))--rp((0,size,0))--cycle;
+ for i=1 upto num:
+ for j=1 upto 6:
+ coos[j] := uniformdeviate(size);
+ endfor;
+ fro := (coos1,coos2,coos3);
+ tip := (coos4,coos5,coos6);
+ comm := "positivecharge(true," & cstr(fro) & "," & bray & ");";
+ getready( comm, fro );
+ comm := "positivecharge(false," & cstr(tip) & "," & bray & ");";
+ getready( comm, tip );
+ endfor;
+ doitnow;
+endfig;
+end.