A friendlier Pythonic interface to PyX
PyX is a wonderful library for drawing (mathematical) diagrams in Python; it has support for LaTeX.
This is intended as a simpler interface to PyX, for simple line drawings.
Example One — Simple Lines:
#!/usr/bin/env python
# -*- coding: UTF-8 -*-
from __future__ import division
import math as maths
from pypyx.pypyx import colour, pic
p = pic (scale = 4.0)
r2 = maths.sqrt(2)
o = (0, 0)
x = (r2, 0)
y = (0, 1)
xy = (r2, 1)
p.op().stroked(colour.light_grey()).circle ((r2/2, 1/2), maths.sqrt(3) / 2)
p.op().dotted().line (o, x)
p.op().stroked('blue').line (o, y)
p.op().styled('dashed red').line (y, xy)
p.op().line (x, xy)
p.op().text ((r2/2, 1/2), 'A4')
p.output_pdf ('line_circle_text')
Example Two — Bézier Curves:
#!/usr/bin/env python
# -*- coding: UTF-8 -*-
from __future__ import division
import math as maths
from pypyx.pypyx import colour, pic
def deg (d):
return (2 * maths.pi) * d / 360
p = pic (scale = 2)
tau = 2 * maths.pi
bit = 0.1
tick = 0.05
### label
p.op().text ((tau/2, 1), 'sine')
### axes
p.op().line ((-bit, 0), (tau+bit, 0))
p.op().line ((0, -(1+bit)), (0, 1+bit))
### axis ticks and labels
p.op().to_left().below().text ((-tick, -tick), r'$0$')
p.op().line ((tau/4, -tick), (tau/4, 0))
p.op().below().text ((tau/4, -tick), r'$\tau/4$')
p.op().line ((tau/2, -tick), (tau/2, 0))
p.op().to_left().below().text ((tau/2, -tick), r'$\tau/2$')
p.op().line ((3*tau/4, -tick), (3*tau/4, 0))
p.op().below().text ((3*tau/4, -tick), r'$3\tau/4$')
p.op().line ((tau, -tick), (tau, 0))
p.op().below().text ((tau, -tick*2), r'$\tau$')
p.op().line ((-tick, 1), (0, 1))
p.op().to_left().text ((-tick, 1), r'$1$')
p.op().line ((-tick, -1), (0, -1))
p.op().to_left().text ((-tick, -1), r'$-1$')
p.op().stroked(colour.green()).smooth_poly_curve (
[
(0, 0),
(tau/4, 1),
],
start_angle = deg(45),
finish_angle = deg(0)
)
p.op().stroked(colour.green()).smooth_poly_curve (
[
(tau/4, 1),
(tau/2, 0),
],
start_angle = deg(0),
finish_angle = deg(-45)
)
p.op().stroked(colour.red()).smooth_poly_curve (
[
(tau/2, 0),
(3*tau/4, -1),
(tau, 0),
],
start_angle = deg(-45),
finish_angle = deg(45)
)
p.output_pdf('smooth-poly-curve_Bézier_sine-wave')
