565 lines
19 KiB
Python
565 lines
19 KiB
Python
"""
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Tests specific to the patches module.
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"""
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import numpy as np
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from numpy.testing import assert_almost_equal, assert_array_equal
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import pytest
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from matplotlib.patches import Polygon, Rectangle, FancyArrowPatch
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from matplotlib.testing.decorators import image_comparison, check_figures_equal
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from matplotlib.transforms import Bbox
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import matplotlib.pyplot as plt
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from matplotlib import (
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collections as mcollections, colors as mcolors, patches as mpatches,
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path as mpath, style as mstyle, transforms as mtransforms)
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import sys
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on_win = (sys.platform == 'win32')
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def test_Polygon_close():
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#: GitHub issue #1018 identified a bug in the Polygon handling
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#: of the closed attribute; the path was not getting closed
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#: when set_xy was used to set the vertices.
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# open set of vertices:
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xy = [[0, 0], [0, 1], [1, 1]]
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# closed set:
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xyclosed = xy + [[0, 0]]
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# start with open path and close it:
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p = Polygon(xy, closed=True)
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assert_array_equal(p.get_xy(), xyclosed)
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p.set_xy(xy)
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assert_array_equal(p.get_xy(), xyclosed)
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# start with closed path and open it:
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p = Polygon(xyclosed, closed=False)
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assert_array_equal(p.get_xy(), xy)
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p.set_xy(xyclosed)
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assert_array_equal(p.get_xy(), xy)
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# start with open path and leave it open:
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p = Polygon(xy, closed=False)
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assert_array_equal(p.get_xy(), xy)
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p.set_xy(xy)
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assert_array_equal(p.get_xy(), xy)
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# start with closed path and leave it closed:
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p = Polygon(xyclosed, closed=True)
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assert_array_equal(p.get_xy(), xyclosed)
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p.set_xy(xyclosed)
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assert_array_equal(p.get_xy(), xyclosed)
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def test_rotate_rect():
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loc = np.asarray([1.0, 2.0])
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width = 2
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height = 3
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angle = 30.0
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# A rotated rectangle
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rect1 = Rectangle(loc, width, height, angle=angle)
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# A non-rotated rectangle
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rect2 = Rectangle(loc, width, height)
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# Set up an explicit rotation matrix (in radians)
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angle_rad = np.pi * angle / 180.0
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rotation_matrix = np.array([[np.cos(angle_rad), -np.sin(angle_rad)],
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[np.sin(angle_rad), np.cos(angle_rad)]])
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# Translate to origin, rotate each vertex, and then translate back
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new_verts = np.inner(rotation_matrix, rect2.get_verts() - loc).T + loc
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# They should be the same
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assert_almost_equal(rect1.get_verts(), new_verts)
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def test_negative_rect():
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# These two rectangles have the same vertices, but starting from a
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# different point. (We also drop the last vertex, which is a duplicate.)
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pos_vertices = Rectangle((-3, -2), 3, 2).get_verts()[:-1]
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neg_vertices = Rectangle((0, 0), -3, -2).get_verts()[:-1]
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assert_array_equal(np.roll(neg_vertices, 2, 0), pos_vertices)
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@image_comparison(['clip_to_bbox'])
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def test_clip_to_bbox():
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fig = plt.figure()
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ax = fig.add_subplot(111)
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ax.set_xlim([-18, 20])
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ax.set_ylim([-150, 100])
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path = mpath.Path.unit_regular_star(8).deepcopy()
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path.vertices *= [10, 100]
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path.vertices -= [5, 25]
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path2 = mpath.Path.unit_circle().deepcopy()
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path2.vertices *= [10, 100]
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path2.vertices += [10, -25]
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combined = mpath.Path.make_compound_path(path, path2)
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patch = mpatches.PathPatch(
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combined, alpha=0.5, facecolor='coral', edgecolor='none')
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ax.add_patch(patch)
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bbox = mtransforms.Bbox([[-12, -77.5], [50, -110]])
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result_path = combined.clip_to_bbox(bbox)
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result_patch = mpatches.PathPatch(
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result_path, alpha=0.5, facecolor='green', lw=4, edgecolor='black')
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ax.add_patch(result_patch)
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@image_comparison(['patch_alpha_coloring'], remove_text=True)
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def test_patch_alpha_coloring():
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"""
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Test checks that the patch and collection are rendered with the specified
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alpha values in their facecolor and edgecolor.
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"""
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star = mpath.Path.unit_regular_star(6)
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circle = mpath.Path.unit_circle()
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# concatenate the star with an internal cutout of the circle
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verts = np.concatenate([circle.vertices, star.vertices[::-1]])
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codes = np.concatenate([circle.codes, star.codes])
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cut_star1 = mpath.Path(verts, codes)
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cut_star2 = mpath.Path(verts + 1, codes)
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ax = plt.axes()
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patch = mpatches.PathPatch(cut_star1,
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linewidth=5, linestyle='dashdot',
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facecolor=(1, 0, 0, 0.5),
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edgecolor=(0, 0, 1, 0.75))
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ax.add_patch(patch)
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col = mcollections.PathCollection([cut_star2],
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linewidth=5, linestyles='dashdot',
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facecolor=(1, 0, 0, 0.5),
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edgecolor=(0, 0, 1, 0.75))
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ax.add_collection(col)
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ax.set_xlim([-1, 2])
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ax.set_ylim([-1, 2])
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@image_comparison(['patch_alpha_override'], remove_text=True)
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def test_patch_alpha_override():
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#: Test checks that specifying an alpha attribute for a patch or
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#: collection will override any alpha component of the facecolor
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#: or edgecolor.
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star = mpath.Path.unit_regular_star(6)
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circle = mpath.Path.unit_circle()
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# concatenate the star with an internal cutout of the circle
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verts = np.concatenate([circle.vertices, star.vertices[::-1]])
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codes = np.concatenate([circle.codes, star.codes])
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cut_star1 = mpath.Path(verts, codes)
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cut_star2 = mpath.Path(verts + 1, codes)
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ax = plt.axes()
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patch = mpatches.PathPatch(cut_star1,
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linewidth=5, linestyle='dashdot',
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alpha=0.25,
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facecolor=(1, 0, 0, 0.5),
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edgecolor=(0, 0, 1, 0.75))
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ax.add_patch(patch)
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col = mcollections.PathCollection([cut_star2],
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linewidth=5, linestyles='dashdot',
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alpha=0.25,
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facecolor=(1, 0, 0, 0.5),
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edgecolor=(0, 0, 1, 0.75))
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ax.add_collection(col)
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ax.set_xlim([-1, 2])
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ax.set_ylim([-1, 2])
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@pytest.mark.style('default')
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def test_patch_color_none():
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# Make sure the alpha kwarg does not override 'none' facecolor.
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# Addresses issue #7478.
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c = plt.Circle((0, 0), 1, facecolor='none', alpha=1)
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assert c.get_facecolor()[0] == 0
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@image_comparison(['patch_custom_linestyle'], remove_text=True)
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def test_patch_custom_linestyle():
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#: A test to check that patches and collections accept custom dash
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#: patterns as linestyle and that they display correctly.
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star = mpath.Path.unit_regular_star(6)
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circle = mpath.Path.unit_circle()
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# concatenate the star with an internal cutout of the circle
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verts = np.concatenate([circle.vertices, star.vertices[::-1]])
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codes = np.concatenate([circle.codes, star.codes])
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cut_star1 = mpath.Path(verts, codes)
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cut_star2 = mpath.Path(verts + 1, codes)
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ax = plt.axes()
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patch = mpatches.PathPatch(
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cut_star1,
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linewidth=5, linestyle=(0, (5, 7, 10, 7)),
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facecolor=(1, 0, 0), edgecolor=(0, 0, 1))
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ax.add_patch(patch)
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col = mcollections.PathCollection(
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[cut_star2],
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linewidth=5, linestyles=[(0, (5, 7, 10, 7))],
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facecolor=(1, 0, 0), edgecolor=(0, 0, 1))
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ax.add_collection(col)
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ax.set_xlim([-1, 2])
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ax.set_ylim([-1, 2])
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def test_patch_linestyle_accents():
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#: Test if linestyle can also be specified with short mnemonics like "--"
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#: c.f. GitHub issue #2136
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star = mpath.Path.unit_regular_star(6)
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circle = mpath.Path.unit_circle()
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# concatenate the star with an internal cutout of the circle
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verts = np.concatenate([circle.vertices, star.vertices[::-1]])
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codes = np.concatenate([circle.codes, star.codes])
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linestyles = ["-", "--", "-.", ":",
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"solid", "dashed", "dashdot", "dotted"]
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fig = plt.figure()
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ax = fig.add_subplot(1, 1, 1)
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for i, ls in enumerate(linestyles):
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star = mpath.Path(verts + i, codes)
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patch = mpatches.PathPatch(star,
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linewidth=3, linestyle=ls,
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facecolor=(1, 0, 0),
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edgecolor=(0, 0, 1))
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ax.add_patch(patch)
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ax.set_xlim([-1, i + 1])
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ax.set_ylim([-1, i + 1])
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fig.canvas.draw()
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def test_wedge_movement():
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param_dict = {'center': ((0, 0), (1, 1), 'set_center'),
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'r': (5, 8, 'set_radius'),
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'width': (2, 3, 'set_width'),
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'theta1': (0, 30, 'set_theta1'),
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'theta2': (45, 50, 'set_theta2')}
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init_args = {k: v[0] for k, v in param_dict.items()}
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w = mpatches.Wedge(**init_args)
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for attr, (old_v, new_v, func) in param_dict.items():
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assert getattr(w, attr) == old_v
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getattr(w, func)(new_v)
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assert getattr(w, attr) == new_v
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# png needs tol>=0.06, pdf tol>=1.617
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@image_comparison(['wedge_range'], remove_text=True, tol=1.65 if on_win else 0)
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def test_wedge_range():
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ax = plt.axes()
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t1 = 2.313869244286224
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args = [[52.31386924, 232.31386924],
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[52.313869244286224, 232.31386924428622],
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[t1, t1 + 180.0],
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[0, 360],
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[90, 90 + 360],
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[-180, 180],
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[0, 380],
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[45, 46],
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[46, 45]]
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for i, (theta1, theta2) in enumerate(args):
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x = i % 3
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y = i // 3
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wedge = mpatches.Wedge((x * 3, y * 3), 1, theta1, theta2,
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facecolor='none', edgecolor='k', lw=3)
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ax.add_artist(wedge)
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ax.set_xlim([-2, 8])
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ax.set_ylim([-2, 9])
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def test_patch_str():
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"""
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Check that patches have nice and working `str` representation.
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Note that the logic is that `__str__` is defined such that:
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str(eval(str(p))) == str(p)
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"""
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p = mpatches.Circle(xy=(1, 2), radius=3)
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assert str(p) == 'Circle(xy=(1, 2), radius=3)'
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p = mpatches.Ellipse(xy=(1, 2), width=3, height=4, angle=5)
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assert str(p) == 'Ellipse(xy=(1, 2), width=3, height=4, angle=5)'
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p = mpatches.Rectangle(xy=(1, 2), width=3, height=4, angle=5)
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assert str(p) == 'Rectangle(xy=(1, 2), width=3, height=4, angle=5)'
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p = mpatches.Wedge(center=(1, 2), r=3, theta1=4, theta2=5, width=6)
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assert str(p) == 'Wedge(center=(1, 2), r=3, theta1=4, theta2=5, width=6)'
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p = mpatches.Arc(xy=(1, 2), width=3, height=4, angle=5, theta1=6, theta2=7)
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expected = 'Arc(xy=(1, 2), width=3, height=4, angle=5, theta1=6, theta2=7)'
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assert str(p) == expected
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p = mpatches.RegularPolygon((1, 2), 20, radius=5)
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assert str(p) == "RegularPolygon((1, 2), 20, radius=5, orientation=0)"
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p = mpatches.CirclePolygon(xy=(1, 2), radius=5, resolution=20)
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assert str(p) == "CirclePolygon((1, 2), radius=5, resolution=20)"
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p = mpatches.FancyBboxPatch((1, 2), width=3, height=4)
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assert str(p) == "FancyBboxPatch((1, 2), width=3, height=4)"
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# Further nice __str__ which cannot be `eval`uated:
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path = mpath.Path([(1, 2), (2, 2), (1, 2)], closed=True)
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p = mpatches.PathPatch(path)
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assert str(p) == "PathPatch3((1, 2) ...)"
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data = [[1, 2], [2, 2], [1, 2]]
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p = mpatches.Polygon(data)
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assert str(p) == "Polygon3((1, 2) ...)"
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p = mpatches.FancyArrowPatch(path=path)
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assert str(p)[:27] == "FancyArrowPatch(Path(array("
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p = mpatches.FancyArrowPatch((1, 2), (3, 4))
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assert str(p) == "FancyArrowPatch((1, 2)->(3, 4))"
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p = mpatches.ConnectionPatch((1, 2), (3, 4), 'data')
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assert str(p) == "ConnectionPatch((1, 2), (3, 4))"
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s = mpatches.Shadow(p, 1, 1)
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assert str(s) == "Shadow(ConnectionPatch((1, 2), (3, 4)))"
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# Not testing Arrow, FancyArrow here
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# because they seem to exist only for historical reasons.
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@image_comparison(['multi_color_hatch'], remove_text=True, style='default')
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def test_multi_color_hatch():
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fig, ax = plt.subplots()
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rects = ax.bar(range(5), range(1, 6))
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for i, rect in enumerate(rects):
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rect.set_facecolor('none')
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rect.set_edgecolor('C{}'.format(i))
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rect.set_hatch('/')
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ax.autoscale_view()
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ax.autoscale(False)
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for i in range(5):
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with mstyle.context({'hatch.color': 'C{}'.format(i)}):
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r = Rectangle((i - .8 / 2, 5), .8, 1, hatch='//', fc='none')
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ax.add_patch(r)
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@image_comparison(['units_rectangle.png'])
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def test_units_rectangle():
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import matplotlib.testing.jpl_units as U
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U.register()
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p = mpatches.Rectangle((5*U.km, 6*U.km), 1*U.km, 2*U.km)
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fig, ax = plt.subplots()
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ax.add_patch(p)
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ax.set_xlim([4*U.km, 7*U.km])
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ax.set_ylim([5*U.km, 9*U.km])
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@image_comparison(['connection_patch.png'], style='mpl20', remove_text=True)
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def test_connection_patch():
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fig, (ax1, ax2) = plt.subplots(1, 2)
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con = mpatches.ConnectionPatch(xyA=(0.1, 0.1), xyB=(0.9, 0.9),
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coordsA='data', coordsB='data',
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axesA=ax2, axesB=ax1,
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arrowstyle="->")
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ax2.add_artist(con)
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xyA = (0.6, 1.0) # in axes coordinates
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xyB = (0.0, 0.2) # x in axes coordinates, y in data coordinates
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coordsA = "axes fraction"
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coordsB = ax2.get_yaxis_transform()
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con = mpatches.ConnectionPatch(xyA=xyA, xyB=xyB, coordsA=coordsA,
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coordsB=coordsB, arrowstyle="-")
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ax2.add_artist(con)
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@check_figures_equal(extensions=["png"])
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def test_connection_patch_fig(fig_test, fig_ref):
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# Test that connection patch can be added as figure artist, and that figure
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# pixels count negative values from the top right corner (this API may be
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# changed in the future).
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ax1, ax2 = fig_test.subplots(1, 2)
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con = mpatches.ConnectionPatch(
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xyA=(.3, .2), coordsA="data", axesA=ax1,
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xyB=(-30, -20), coordsB="figure pixels",
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arrowstyle="->", shrinkB=5)
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fig_test.add_artist(con)
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ax1, ax2 = fig_ref.subplots(1, 2)
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bb = fig_ref.bbox
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# Necessary so that pixel counts match on both sides.
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plt.rcParams["savefig.dpi"] = plt.rcParams["figure.dpi"]
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con = mpatches.ConnectionPatch(
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xyA=(.3, .2), coordsA="data", axesA=ax1,
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xyB=(bb.width - 30, bb.height - 20), coordsB="figure pixels",
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arrowstyle="->", shrinkB=5)
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fig_ref.add_artist(con)
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def test_datetime_rectangle():
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# Check that creating a rectangle with timedeltas doesn't fail
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from datetime import datetime, timedelta
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start = datetime(2017, 1, 1, 0, 0, 0)
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delta = timedelta(seconds=16)
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patch = mpatches.Rectangle((start, 0), delta, 1)
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fig, ax = plt.subplots()
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ax.add_patch(patch)
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def test_datetime_datetime_fails():
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from datetime import datetime
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start = datetime(2017, 1, 1, 0, 0, 0)
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dt_delta = datetime(1970, 1, 5) # Will be 5 days if units are done wrong
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with pytest.raises(TypeError):
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mpatches.Rectangle((start, 0), dt_delta, 1)
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with pytest.raises(TypeError):
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mpatches.Rectangle((0, start), 1, dt_delta)
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def test_contains_point():
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ell = mpatches.Ellipse((0.5, 0.5), 0.5, 1.0, 0)
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points = [(0.0, 0.5), (0.2, 0.5), (0.25, 0.5), (0.5, 0.5)]
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path = ell.get_path()
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transform = ell.get_transform()
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radius = ell._process_radius(None)
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expected = np.array([path.contains_point(point,
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transform,
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radius) for point in points])
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result = np.array([ell.contains_point(point) for point in points])
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assert np.all(result == expected)
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|
|
|
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def test_contains_points():
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ell = mpatches.Ellipse((0.5, 0.5), 0.5, 1.0, 0)
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points = [(0.0, 0.5), (0.2, 0.5), (0.25, 0.5), (0.5, 0.5)]
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path = ell.get_path()
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|
transform = ell.get_transform()
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radius = ell._process_radius(None)
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expected = path.contains_points(points, transform, radius)
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result = ell.contains_points(points)
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assert np.all(result == expected)
|
|
|
|
|
|
# Currently fails with pdf/svg, probably because some parts assume a dpi of 72.
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|
@check_figures_equal(extensions=["png"])
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|
def test_shadow(fig_test, fig_ref):
|
|
xy = np.array([.2, .3])
|
|
dxy = np.array([.1, .2])
|
|
# We need to work around the nonsensical (dpi-dependent) interpretation of
|
|
# offsets by the Shadow class...
|
|
plt.rcParams["savefig.dpi"] = "figure"
|
|
# Test image.
|
|
a1 = fig_test.subplots()
|
|
rect = mpatches.Rectangle(xy=xy, width=.5, height=.5)
|
|
shadow = mpatches.Shadow(rect, ox=dxy[0], oy=dxy[1])
|
|
a1.add_patch(rect)
|
|
a1.add_patch(shadow)
|
|
# Reference image.
|
|
a2 = fig_ref.subplots()
|
|
rect = mpatches.Rectangle(xy=xy, width=.5, height=.5)
|
|
shadow = mpatches.Rectangle(
|
|
xy=xy + fig_ref.dpi / 72 * dxy, width=.5, height=.5,
|
|
fc=np.asarray(mcolors.to_rgb(rect.get_facecolor())) * .3,
|
|
ec=np.asarray(mcolors.to_rgb(rect.get_facecolor())) * .3,
|
|
alpha=.5)
|
|
a2.add_patch(shadow)
|
|
a2.add_patch(rect)
|
|
|
|
|
|
def test_fancyarrow_units():
|
|
from datetime import datetime
|
|
# Smoke test to check that FancyArrowPatch works with units
|
|
dtime = datetime(2000, 1, 1)
|
|
fig, ax = plt.subplots()
|
|
arrow = FancyArrowPatch((0, dtime), (0.01, dtime))
|
|
ax.add_patch(arrow)
|
|
|
|
|
|
@image_comparison(["large_arc.svg"], style="mpl20")
|
|
def test_large_arc():
|
|
fig, (ax1, ax2) = plt.subplots(1, 2)
|
|
x = 210
|
|
y = -2115
|
|
diameter = 4261
|
|
for ax in [ax1, ax2]:
|
|
a = mpatches.Arc((x, y), diameter, diameter, lw=2, color='k')
|
|
ax.add_patch(a)
|
|
ax.set_axis_off()
|
|
ax.set_aspect('equal')
|
|
# force the high accuracy case
|
|
ax1.set_xlim(7, 8)
|
|
ax1.set_ylim(5, 6)
|
|
|
|
# force the low accuracy case
|
|
ax2.set_xlim(-25000, 18000)
|
|
ax2.set_ylim(-20000, 6600)
|
|
|
|
|
|
@image_comparison(["all_quadrants_arcs.svg"], style="mpl20")
|
|
def test_rotated_arcs():
|
|
fig, ax_arr = plt.subplots(2, 2, squeeze=False, figsize=(10, 10))
|
|
|
|
scale = 10_000_000
|
|
diag_centers = ((-1, -1), (-1, 1), (1, 1), (1, -1))
|
|
on_axis_centers = ((0, 1), (1, 0), (0, -1), (-1, 0))
|
|
skews = ((2, 2), (2, 1/10), (2, 1/100), (2, 1/1000))
|
|
|
|
for ax, (sx, sy) in zip(ax_arr.ravel(), skews):
|
|
k = 0
|
|
for prescale, centers in zip((1 - .0001, (1 - .0001) / np.sqrt(2)),
|
|
(on_axis_centers, diag_centers)):
|
|
for j, (x_sign, y_sign) in enumerate(centers, start=k):
|
|
a = mpatches.Arc(
|
|
(x_sign * scale * prescale,
|
|
y_sign * scale * prescale),
|
|
scale * sx,
|
|
scale * sy,
|
|
lw=4,
|
|
color=f"C{j}",
|
|
zorder=1 + j,
|
|
angle=np.rad2deg(np.arctan2(y_sign, x_sign)) % 360,
|
|
label=f'big {j}',
|
|
gid=f'big {j}'
|
|
)
|
|
ax.add_patch(a)
|
|
|
|
k = j+1
|
|
ax.set_xlim(-scale / 4000, scale / 4000)
|
|
ax.set_ylim(-scale / 4000, scale / 4000)
|
|
ax.axhline(0, color="k")
|
|
ax.axvline(0, color="k")
|
|
ax.set_axis_off()
|
|
ax.set_aspect("equal")
|
|
|
|
|
|
def test_degenerate_polygon():
|
|
point = [0, 0]
|
|
correct_extents = Bbox([point, point]).extents
|
|
assert np.all(Polygon([point]).get_extents().extents == correct_extents)
|