/usr/share/gle-graphics/4.2.5/gleinc/piesub.gle is in gle-graphics 4.2.5-7.
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! !
! GLE - Graphics Layout Engine <http://www.gle-graphics.org/> !
! !
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! Copyright (C) 2009 GLE. !
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! Subroutines to draw a pie wedge between two supplied angles
sub pie ang1 ang2 radius colour$
!
! draw pie wedge between ang1 and ang2
! radius.... the radius
! colour$... the fill color of the wedge
!
begin path fill colour$ stroke
rmove 0 0 !The rmove command is necessary to set
arc radius ang1 ang2 !the beginning of the path
closepath
end path
end sub
sub pie_text ang1 ang2 radius colour$ label$
!sub pie - Subroutine to draw a coloured pie wedge
! between two supplied angles
! with a key and a label
! draw pie wedge between ang1 and ang2
! radius.... the radius
! colour$... the fill color of the wedge
! label$ ... te text you want to display
!
gsave
begin path fill colour$ stroke
rmove 0 0 !The rmove command is necessary to set
arc radius ang1 ang2 !the beginning of the path
closepath
end path
!
! put text in center of pie
!
set just cc
ang = ang1+(ang2-ang1)/2
rmove (radius/2)*cos(torad(ang)) (radius/2)*sin(torad(ang))
write label$
grestore
end sub
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