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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#====================== BEGIN GPL LICENSE BLOCK ======================
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
#======================= END GPL LICENSE BLOCK ========================
# <pep8 compliant>
import math
import collections
from itertools import tee, chain, islice, repeat
from mathutils import Vector, Matrix, Color
#=============================================
# Math
#=============================================
def angle_on_plane(plane, vec1, vec2):
""" Return the angle between two vectors projected onto a plane.
"""
plane.normalize()
vec1 = vec1 - (plane * (vec1.dot(plane)))
vec2 = vec2 - (plane * (vec2.dot(plane)))
vec1.normalize()
vec2.normalize()
# Determine the angle
angle = math.acos(max(-1.0, min(1.0, vec1.dot(vec2))))
if angle < 0.00001: # close enough to zero that sign doesn't matter
return angle
# Determine the sign of the angle
vec3 = vec2.cross(vec1)
vec3.normalize()
sign = vec3.dot(plane)
if sign >= 0:
sign = 1
else:
sign = -1
return angle * sign
#=============================================
# Color correction functions
#=============================================
def linsrgb_to_srgb (linsrgb):
"""Convert physically linear RGB values into sRGB ones. The transform is
uniform in the components, so *linsrgb* can be of any shape.
*linsrgb* values should range between 0 and 1, inclusively.
"""
# From Wikipedia, but easy analogue to the above.
gamma = 1.055 * linsrgb**(1./2.4) - 0.055
scale = linsrgb * 12.92
# return np.where (linsrgb > 0.0031308, gamma, scale)
if linsrgb > 0.0031308:
return gamma
return scale
def gamma_correct(color):
corrected_color = Color()
for i, component in enumerate(color):
corrected_color[i] = linsrgb_to_srgb(color[i])
return corrected_color
#=============================================
# Iterators
#=============================================
def padnone(iterable, pad=None):
return chain(iterable, repeat(pad))
def pairwise_nozip(iterable):
"s -> (s0,s1), (s1,s2), (s2,s3), ..."
a, b = tee(iterable)
next(b, None)
return a, b
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2,s3), ..."
a, b = tee(iterable)
next(b, None)
return zip(a, b)
def map_list(func, *inputs):
"[func(a0,b0...), func(a1,b1...), ...]"
return list(map(func, *inputs))
def skip(n, iterable):
"Returns an iterator skipping first n elements of an iterable."
iterator = iter(iterable)
if n == 1:
next(iterator, None)
else:
next(islice(iterator, n, n), None)
return iterator
def map_apply(func, *inputs):
"Apply the function to inputs like map for side effects, discarding results."
collections.deque(map(func, *inputs), maxlen=0)
#=============================================
# Misc
#=============================================
def copy_attributes(a, b):
keys = dir(a)
for key in keys:
if not key.startswith("_") \
and not key.startswith("error_") \
and key != "group" \
and key != "is_valid" \
and key != "rna_type" \
and key != "bl_rna":
try:
setattr(b, key, getattr(a, key))
except AttributeError:
pass
def assign_parameters(target, val_dict=None, **params):
data = { **val_dict, **params } if val_dict else params
for key, value in data.items():
try:
target[key] = value
except Exception as e:
raise Exception("Couldn't set {} to {}: {}".format(key,value,e))
def select_object(context, object, deselect_all=False):
view_layer = context.view_layer
if deselect_all:
for objt in view_layer.objects:
objt.select_set(False) # deselect all objects
object.select_set(True)
view_layer.objects.active = object
|
