GLE Example: 1.gle

[PDF file]

 

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size 7.2 1 ! 6*x+2*(dx+d) y+2*d

include "feyn.gle"

x = 1
y = 0.8
dx = 0.5
d = 0.1

a = 1.75*doublea

sub quad x y
    amove x-a y-a
    begin path fill black
        rline 2*a 0
        rline 0 2*a
        rline -2*a 0
        rline 0 -2*a
    end path
    amove x y
end sub

begin translate x+d d
    amove -x 0
    @double x 0
    @arrow 0.25
    @arrow 0.75
    @quad 0 0
end translate

begin translate 3*x+dx+d d
    amove -x 0
    @double x 0
    @arrow 0.25
    @arrow 0.75
    @quad 0 0
    @photon 0 y
end translate

begin translate 5*x+2*dx+d d
    amove -x 0
    @double x 0
    @arrow 0.25
    @arrow 0.75
    @quad 0 0
    @photon -y y
    amove 0 0
    photona = -photona
    @photon y y
    photona = -photona
end translate

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