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#====================== 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 bpy
import math
import collections
from itertools import tee, chain, islice, repeat
from mathutils import Vector, Matrix, Color
from rna_prop_ui import rna_idprop_value_to_python
#=============================================
# 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
# Convert between a matrix and axis+roll representations.
# Re-export the C implementation internally used by bones.
matrix_from_axis_roll = bpy.types.Bone.MatrixFromAxisRoll
axis_roll_from_matrix = bpy.types.Bone.AxisRollFromMatrix
def matrix_from_axis_pair(y_axis, other_axis, axis_name):
assert axis_name in 'xz'
y_axis = Vector(y_axis).normalized()
if axis_name == 'x':
z_axis = Vector(other_axis).cross(y_axis).normalized()
x_axis = y_axis.cross(z_axis)
else:
x_axis = y_axis.cross(other_axis).normalized()
z_axis = x_axis.cross(y_axis)
return Matrix((x_axis, y_axis, z_axis)).transposed()
#=============================================
# 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 property_to_python(value):
value = rna_idprop_value_to_python(value)
if isinstance(value, dict):
return { k: property_to_python(v) for k, v in value.items() }
elif isinstance(value, list):
return map_list(property_to_python, value)
else:
return value
def clone_parameters(target):
return property_to_python(dict(target))
def assign_parameters(target, val_dict=None, **params):
if val_dict is not None:
for key in list(target.keys()):
del target[key]
data = { **val_dict, **params }
else:
data = 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
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