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yap-6.3/packages/python/examples/pyx.pl
Vitor Santos Costa 36ae500118 fixes
2012-12-03 12:39:25 +00:00

50 lines
1.4 KiB
Prolog

:- use_module(library(python)).
:- initialization(main).
setup_dir :-
prolog_load_context(directory, Dir),
atom_concat(Dir,'pyx/',Base),
assert(base(Base)).
:- setup_dir.
main :-
python_import(pyx),
ex(X),
flush_output,
fail.
main.
ex(hello) :-
c := canvas:canvas(_),
:= $c:text(0, 0, 'Hello, world!'),
:= $c:stroke(path:line(0, 0, 2, 0)),
:= $c:writePDFfile('hello').
ex(pathitem) :-
c := canvas:canvas(_),
rect1 := path:path(path:moveto(0, 0), path:lineto(1, 0),
path:moveto(1, 0), path:lineto(1, 1),
path:moveto(1, 1), path:lineto(0, 1),
path:moveto(0, 1), path:lineto(0, 0)),
rect2 := path:path(path:moveto(2, 0), path:lineto(3, 0),
path:lineto(3, 1), path:lineto(2, 1),
path:lineto(2, 0)),
rect3 := path:path(path:moveto(4, 0), path:lineto(5, 0),
path:lineto(5, 1), path:lineto(4, 1),
path:closepath(_)),
:= $c:stroke($rect1, [style:linewidth:'THICK']),
:= $c:stroke($rect2, [style:linewidth:'THICK']),
:= $c:stroke($rect3, [style:linewidth:'THICK']),
:= $c:writePDFfile('pathitem').
ex(changebar) :-
g := graph:graphxy(width=8, x=graph:axis:bar(_)),
base(Source), atomic_concat(Source, 'minimal.dat', Data),
:= $g:plot(graph:data:file(Data, xname=0, y=2), [graph:style:changebar(_)]),
:= $g:writePDFfile(changebar).