55 lines
1.9 KiB
Python
55 lines
1.9 KiB
Python
import numpy as np
|
|
from io import BytesIO
|
|
import os
|
|
import tempfile
|
|
import warnings
|
|
|
|
import pytest
|
|
|
|
import matplotlib.pyplot as plt
|
|
from matplotlib.testing.decorators import check_figures_equal
|
|
import matplotlib
|
|
from matplotlib import (
|
|
collections as mcollections, patches as mpatches, path as mpath)
|
|
|
|
|
|
@pytest.mark.backend('cairo')
|
|
@check_figures_equal(extensions=["png"])
|
|
def test_patch_alpha_coloring(fig_test, fig_ref):
|
|
"""
|
|
Test checks that the patch and collection are rendered with the specified
|
|
alpha values in their facecolor and edgecolor.
|
|
"""
|
|
star = mpath.Path.unit_regular_star(6)
|
|
circle = mpath.Path.unit_circle()
|
|
# concatenate the star with an internal cutout of the circle
|
|
verts = np.concatenate([circle.vertices, star.vertices[::-1]])
|
|
codes = np.concatenate([circle.codes, star.codes])
|
|
cut_star1 = mpath.Path(verts, codes)
|
|
cut_star2 = mpath.Path(verts + 1, codes)
|
|
|
|
# Reference: two separate patches
|
|
ax = fig_ref.subplots()
|
|
ax.set_xlim([-1, 2])
|
|
ax.set_ylim([-1, 2])
|
|
patch = mpatches.PathPatch(cut_star1,
|
|
linewidth=5, linestyle='dashdot',
|
|
facecolor=(1, 0, 0, 0.5),
|
|
edgecolor=(0, 0, 1, 0.75))
|
|
ax.add_patch(patch)
|
|
patch = mpatches.PathPatch(cut_star2,
|
|
linewidth=5, linestyle='dashdot',
|
|
facecolor=(1, 0, 0, 0.5),
|
|
edgecolor=(0, 0, 1, 0.75))
|
|
ax.add_patch(patch)
|
|
|
|
# Test: path collection
|
|
ax = fig_test.subplots()
|
|
ax.set_xlim([-1, 2])
|
|
ax.set_ylim([-1, 2])
|
|
col = mcollections.PathCollection([cut_star1, cut_star2],
|
|
linewidth=5, linestyles='dashdot',
|
|
facecolor=(1, 0, 0, 0.5),
|
|
edgecolor=(0, 0, 1, 0.75))
|
|
ax.add_collection(col)
|