Édition du fichier noeud

%% d'apres les donnees de
%% http://www.mathcurve.com/courbes3d/noeuds/noeuddetrefle.shtml

-1 1 setxrange
-1 1 setyrange
200 setxunit

50.01 50 20 SetCamPos
0 0 0 SetCamView
%/ScreenDist .05 def

-10 10 setxrange3d
-3 3 setyrange3d
2 setlinejoin

/m 12 def %% ex R
/r 8 def
/n 3 1 div def

/g {
3 dict begin
   settvar
#rpn# (4+Cos(3*t))*Cos(2*t)
#rpn# (4+Cos(3*t))*Sin(2*t)
#rpn# Sin(3*t)
end
} def

/g' {
3 dict begin
   settvar
#rpn# -3*Sin(3*t)*Cos(2*t) - 2*(4+Cos(3*t))*Sin(2*t)
#rpn# -3*Sin(3*t)*Sin(2*t) + 2*(4+Cos(3*t))*Cos(2*t)
#rpn# 3*Cos(3*t)
end
} def

/g'' {
3 dict begin
   settvar
#rpn# -9*Cos(3*t)*Cos(2*t) + 6*Sin(3*t)*Sin(2*t) + 6*Sin(3*t)*Sin(2*t) - 4*(4+Cos(3*t))*Cos(2*t)
#rpn# -9*Cos(3*t)*Sin(2*t) -6*Sin(3*t)*Cos(2*t) - 6*Sin(3*t)*Cos(2*t) - 4*(4+Cos(3*t))*Sin(2*t)
#rpn# -9*Sin(3*t)
end
} def

%rouge
0 pi 2 mul {g} CourbeR3
%stop

.1 setlinewidth
/aretescachees false def

GetCamPos setlightsrc
%solidgridOff

0 2 pi mul (g) .5 [102 8] newtube
%dup (rouge) outputcolors
dup [.5 .6] solidputhuecolors
dup videsolid

drawsolid**

Tapez les 3 lettres : AWE

Édition du fichier noeud_20.jps