1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
import shutil
import tempfile
import unittest
from pathlib import Path
import numpy as np
from PIL import Image
from mapgen import sketch as SK
from mapgen.pipeline import StageError
from tests.helpers import make_ctx
class SampleTest(unittest.TestCase):
def test_bilinear_centres_and_wrap(self):
img = np.arange(32, dtype=np.float64).reshape(4, 8)
# pixel (1, 2) centre: lon = 2.5/8*360-180 = -67.5, lat = 90-1.5/4*180 = 22.5
self.assertAlmostEqual(SK.sample_equirect(img, np.array([22.5]), np.array([-67.5]))[0], img[1, 2])
a = SK.sample_equirect(img, np.array([22.5]), np.array([179.999]))[0]
b = SK.sample_equirect(img, np.array([22.5]), np.array([-179.999]))[0]
self.assertAlmostEqual(a, b, places=2) # wraps across the antimeridian
self.assertAlmostEqual(SK.sample_equirect(img, np.array([90.0]), np.array([-157.5]))[0], img[0, 0])
def test_mask_8bit_and_any_size(self):
tmp = Path(tempfile.mkdtemp())
try:
Image.fromarray(np.full((19, 37), 255, np.uint8), "L").save(tmp / "a.png")
Image.fromarray(np.full((10, 20), 32768, np.uint16)).save(tmp / "b.png")
self.assertGreater(SK.load_mask(tmp / "a.png").min(), 0.99)
self.assertAlmostEqual(float(np.abs(SK.load_mask(tmp / "b.png")).max()), 0.0)
finally:
shutil.rmtree(tmp)
class StageTest(unittest.TestCase):
def setUp(self):
self.tmp = Path(tempfile.mkdtemp())
def tearDown(self):
shutil.rmtree(self.tmp)
def test_requires_import(self):
ctx = make_ctx(1, root=self.tmp)
with self.assertRaisesRegex(StageError, "new-world"):
SK.run(ctx)
def test_outputs(self):
(self.tmp / "sketch").mkdir()
land = np.zeros((100, 200), np.uint8)
land[:, :100] = 255 # western hemisphere is land
for n in SK.SKETCH:
Image.fromarray(land if n == "land" else np.zeros_like(land), "L").save(self.tmp / "sketch" / f"{n}.png")
ctx = make_ctx(2, root=self.tmp)
out = SK.run(ctx)
g = ctx.grid
self.assertGreater(out["sk_land"][g.lon < -10].mean(), 0.95)
self.assertLess(out["sk_land"][g.lon > 10].mean(), 0.05)
for m in SK.MASKS:
self.assertTrue(np.all(out[f"m_{m}"] == 0))
class MaskFormatsTest(unittest.TestCase):
def setUp(self):
self.tmp = Path(tempfile.mkdtemp())
def tearDown(self):
shutil.rmtree(self.tmp)
def test_gimp_formats(self):
Image.fromarray(np.full((8, 16), 128, np.uint8), "L").save(self.tmp / "grey.png")
pal = Image.new("P", (16, 8), 0)
pal.putpalette([128, 128, 128, 255, 255, 255] + [0] * 762)
pal.save(self.tmp / "pal_grey.png")
pal.paste(1, (0, 0, 16, 8))
pal.save(self.tmp / "pal_white.png")
Image.new("1", (16, 8), 1).save(self.tmp / "bit_white.png")
Image.new("RGBA", (16, 8), (0, 0, 0, 0)).save(self.tmp / "clear.png")
self.assertEqual(float(np.abs(SK.load_mask(self.tmp / "grey.png")).max()), 0.0)
self.assertEqual(float(np.abs(SK.load_mask(self.tmp / "pal_grey.png")).max()), 0.0)
self.assertAlmostEqual(float(SK.load_mask(self.tmp / "pal_white.png").min()), 1.0)
self.assertAlmostEqual(float(SK.load_mask(self.tmp / "bit_white.png").min()), 1.0)
self.assertEqual(float(np.abs(SK.load_mask(self.tmp / "clear.png")).max()), 0.0)
def test_corrupt_mask_is_stage_error(self):
(self.tmp / "bad.png").write_bytes(b"not a png")
with self.assertRaisesRegex(StageError, "bad.png"):
SK.load_mask(self.tmp / "bad.png")
class SketchWarpTest(unittest.TestCase):
def setUp(self):
self.tmp = Path(tempfile.mkdtemp())
(self.tmp / "sketch").mkdir()
lat = 90 - (np.arange(100) + 0.5) * 1.8
lon = (np.arange(200) + 0.5) * 1.8 - 180
LA, LO = np.meshgrid(lat, lon, indexing="ij")
land = ((np.abs(LA) < 35) & (np.abs(LO) < 60)).astype(np.uint8) * 255
for n in SK.SKETCH:
Image.fromarray(land if n == "land" else np.zeros_like(land), "L").save(self.tmp / "sketch" / f"{n}.png")
def tearDown(self):
shutil.rmtree(self.tmp)
def _land(self, **over):
ctx = make_ctx(3, root=self.tmp, cfg={"sketch": over} if over else None)
return SK.run(ctx)["sk_land"] > 0.5, ctx.grid
def test_warp_off_matches_drawing(self):
warped, g = self._land(warp_km=0.0, detail_warp_km=0.0)
direct = SK.sample_equirect(SK.load_png01(self.tmp / "sketch" / "land.png"), g.lat, g.lon) > 0.5
np.testing.assert_array_equal(warped, direct)
def test_default_warp_deviates_but_keeps_continent(self):
straight, g = self._land(warp_km=0.0, detail_warp_km=0.0)
warped, _ = self._land()
iou = (warped & straight).sum() / (warped | straight).sum()
self.assertTrue(0.35 < iou < 0.85, iou)
again, _ = self._land()
np.testing.assert_array_equal(warped, again)
class SketchMoveTest(unittest.TestCase):
def setUp(self):
self.tmp = Path(tempfile.mkdtemp())
(self.tmp / "sketch").mkdir()
lat = 90 - (np.arange(200) + 0.5) * 0.9
lon = (np.arange(400) + 0.5) * 0.9 - 180
LA, LO = np.meshgrid(lat, lon, indexing="ij")
land = (((LA - 0) ** 2 + (LO - 0) ** 2 < 15 ** 2) | ((LA + 40) ** 2 + (LO - 100) ** 2 < 10 ** 2))
for n in SK.SKETCH:
Image.fromarray((land * 255).astype(np.uint8) if n == "land" else np.zeros(land.shape, np.uint8), "L") \
.save(self.tmp / "sketch" / f"{n}.png")
def tearDown(self):
shutil.rmtree(self.tmp)
def _land(self, moves):
ctx = make_ctx(4, root=self.tmp, cfg={"sketch": {"warp_km": 0.0, "detail_warp_km": 0.0, "moves": moves}})
return SK.run(ctx)["sk_land"] > 0.5, ctx.grid
def test_move_rotates_one_continent_and_keeps_its_area(self):
before, g = self._land([])
after, _ = self._land([{"at": [0.0, 0.0], "to": [30.0, 0.0]}])
near = lambda la, lo, r: g.radius_km * np.arccos(np.clip(g.xyz @ g.xyz[g.cell_index(la, lo)], -1, 1)) < r
self.assertTrue(before[near(0.0, 0.0, 800)].all() and not after[near(0.0, 0.0, 800)].any())
self.assertTrue(after[near(30.0, 0.0, 800)].all())
other = near(-40.0, 100.0, 600)
np.testing.assert_array_equal(before[other], after[other]) # the other island stays
a = g.area_km2
moved_area = a[after & ~other].sum() / a[before & ~other].sum()
self.assertAlmostEqual(moved_area, 1.0, delta=0.05) # rotation preserves area
|
