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showcase example code: firefox.pyΒΆ

(Source code, png, pdf)

../../_images/firefox.png
"""
=======
Firefox
=======

This example shows how to create the Firefox logo with path and patches.
"""

import re
import numpy as np
import matplotlib.pyplot as plt
from matplotlib.path import Path
import matplotlib.patches as patches

# From: http://raphaeljs.com/icons/#firefox
firefox = "M28.4,22.469c0.479-0.964,0.851-1.991,1.095-3.066c0.953-3.661,0.666-6.854,0.666-6.854l-0.327,2.104c0,0-0.469-3.896-1.044-5.353c-0.881-2.231-1.273-2.214-1.274-2.21c0.542,1.379,0.494,2.169,0.483,2.288c-0.01-0.016-0.019-0.032-0.027-0.047c-0.131-0.324-0.797-1.819-2.225-2.878c-2.502-2.481-5.943-4.014-9.745-4.015c-4.056,0-7.705,1.745-10.238,4.525C5.444,6.5,5.183,5.938,5.159,5.317c0,0-0.002,0.002-0.006,0.005c0-0.011-0.003-0.021-0.003-0.031c0,0-1.61,1.247-1.436,4.612c-0.299,0.574-0.56,1.172-0.777,1.791c-0.375,0.817-0.75,2.004-1.059,3.746c0,0,0.133-0.422,0.399-0.988c-0.064,0.482-0.103,0.971-0.116,1.467c-0.09,0.845-0.118,1.865-0.039,3.088c0,0,0.032-0.406,0.136-1.021c0.834,6.854,6.667,12.165,13.743,12.165l0,0c1.86,0,3.636-0.37,5.256-1.036C24.938,27.771,27.116,25.196,28.4,22.469zM16.002,3.356c2.446,0,4.73,0.68,6.68,1.86c-2.274-0.528-3.433-0.261-3.423-0.248c0.013,0.015,3.384,0.589,3.981,1.411c0,0-1.431,0-2.856,0.41c-0.065,0.019,5.242,0.663,6.327,5.966c0,0-0.582-1.213-1.301-1.42c0.473,1.439,0.351,4.17-0.1,5.528c-0.058,0.174-0.118-0.755-1.004-1.155c0.284,2.037-0.018,5.268-1.432,6.158c-0.109,0.07,0.887-3.189,0.201-1.93c-4.093,6.276-8.959,2.539-10.934,1.208c1.585,0.388,3.267,0.108,4.242-0.559c0.982-0.672,1.564-1.162,2.087-1.047c0.522,0.117,0.87-0.407,0.464-0.872c-0.405-0.466-1.392-1.105-2.725-0.757c-0.94,0.247-2.107,1.287-3.886,0.233c-1.518-0.899-1.507-1.63-1.507-2.095c0-0.366,0.257-0.88,0.734-1.028c0.58,0.062,1.044,0.214,1.537,0.466c0.005-0.135,0.006-0.315-0.001-0.519c0.039-0.077,0.015-0.311-0.047-0.596c-0.036-0.287-0.097-0.582-0.19-0.851c0.01-0.002,0.017-0.007,0.021-0.021c0.076-0.344,2.147-1.544,2.299-1.659c0.153-0.114,0.55-0.378,0.506-1.183c-0.015-0.265-0.058-0.294-2.232-0.286c-0.917,0.003-1.425-0.894-1.589-1.245c0.222-1.231,0.863-2.11,1.919-2.704c0.02-0.011,0.015-0.021-0.008-0.027c0.219-0.127-2.524-0.006-3.76,1.604C9.674,8.045,9.219,7.95,8.71,7.95c-0.638,0-1.139,0.07-1.603,0.187c-0.05,0.013-0.122,0.011-0.208-0.001C6.769,8.04,6.575,7.88,6.365,7.672c0.161-0.18,0.324-0.356,0.495-0.526C9.201,4.804,12.43,3.357,16.002,3.356z"


def svg_parse(path):
    commands = {'M': (Path.MOVETO,),
                'L': (Path.LINETO,),
                'Q': (Path.CURVE3,)*2,
                'C': (Path.CURVE4,)*3,
                'Z': (Path.CLOSEPOLY,)}
    path_re = re.compile(r'([MLHVCSQTAZ])([^MLHVCSQTAZ]+)', re.IGNORECASE)
    float_re = re.compile(r'(?:[\s,]*)([+-]?\d+(?:\.\d+)?)')
    vertices = []
    codes = []
    last = (0, 0)
    for cmd, values in path_re.findall(path):
        points = [float(v) for v in float_re.findall(values)]
        points = np.array(points).reshape((len(points)//2, 2))
        if cmd.islower():
            points += last
        cmd = cmd.capitalize()
        last = points[-1]
        codes.extend(commands[cmd])
        vertices.extend(points.tolist())
    return codes, vertices

# SVG to matplotlib
codes, verts = svg_parse(firefox)
verts = np.array(verts)
path = Path(verts, codes)

# Make upside down
verts[:, 1] *= -1
xmin, xmax = verts[:, 0].min()-1, verts[:, 0].max()+1
ymin, ymax = verts[:, 1].min()-1, verts[:, 1].max()+1

fig = plt.figure(figsize=(5, 5))
ax = fig.add_axes([0.0, 0.0, 1.0, 1.0], frameon=False, aspect=1)

# White outline (width = 6)
patch = patches.PathPatch(path, facecolor='None', edgecolor='w', lw=6)
ax.add_patch(patch)

# Actual shape with black outline
patch = patches.PathPatch(path, facecolor='orange', edgecolor='k', lw=2)
ax.add_patch(patch)

# Centering
ax.set_xlim(xmin, xmax)
ax.set_ylim(ymin, ymax)

# No ticks
ax.set_xticks([])
ax.set_yticks([])

# Display
plt.show()

Keywords: python, matplotlib, pylab, example, codex (see Search examples)