/usr/lib/pybik/pybiklib/modelcommon.py is in pybik 2.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | #!/usr/bin/python3
# -*- coding: utf-8 -*-
# Copyright © 2014-2015 B. Clausius <barcc@gmx.de>
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
from math import sqrt, atan2
epsdigits = 5
epsilon = 10**-epsdigits
filebyteorder = 'little'
def get_texcoords_range(verts, normal):
texcoords = [vert.rotationyx_normal(normal) for vert in verts]
minx = min(x for x, y in texcoords)
maxx = max(x for x, y in texcoords)
miny = min(y for x, y in texcoords)
maxy = max(y for x, y in texcoords)
return minx, maxx, miny, maxy
class Coords (tuple):
def __new__(cls, args=(0,0,0)):
return tuple.__new__(cls, args)
def __add__(self, other):
return self.__class__(s+o for s, o in zip(self, other))
def __sub__(self, other):
return self.__class__(s-o for s, o in zip(self, other))
def __repr__(self):
return '{}({})'.format(self.__class__.__name__, super().__repr__())
def __str__(self):
return str(list(self))
class Vector(Coords):
def __neg__(self):
return self.__class__(-s for s in self)
def __mul__(self, value):
return self.__class__(s*value for s in self)
def __truediv__(self, value):
return self.__class__(s/value for s in self)
def cross(self, other):
return self.__class__((
self[1] * other[2] - other[1] * self[2],
self[2] * other[0] - other[2] * self[0],
self[0] * other[1] - other[0] * self[1]))
def dot(self, other): return sum(s*o for s, o in zip(self, other))
def length_squared(self): return self.dot(self)
def length(self): return sqrt(self.length_squared())
def normalised(self): return self / self.length()
def angle(self, other):
sina = self.cross(other).length()
cosa = self.dot(other)
return atan2(sina, cosa)
def angle_plane(self, other, plane_normal):
cross = self.cross(other)
sina = cross.length()
cosa = self.dot(other)
angle = atan2(sina, cosa)
if cross.dot(plane_normal) < 0:
return - angle
return angle
def anglex(self):
sina = -self[1]
cosa = -self[2]
if sina*sina + cosa*cosa < epsilon:
cosa, sina = 1, 0
return cosa, sina
def angley(self):
sina = -self[0]
cosa = self[2]
if sina*sina + cosa*cosa < epsilon:
cosa, sina = 1, 0
return cosa, sina
def rotationx(self, cosa, sina):
return self.__class__((self[0], cosa*self[1] - sina*self[2], sina*self[1] + cosa*self[2]))
def rotationy(self, cosa, sina):
return self.__class__((cosa*self[0] + sina*self[2], self[1], cosa*self[2] - sina*self[0]))
def angleyx(self):
''' Same as:
cosay, sinay = self.angley()
cosax, sinax = self.rotationy(cosay, sinay).anglex()
return cosay, sinay, cosax, sinax
'''
x, y, z = self
xx = x*x
zz = z*z
xx_zz = xx + zz
if xx_zz < epsilon:
if y*y + zz < epsilon:
return 1, 0, 1, 0
else:
return 1, 0, -z, -y
else:
if y*y + xx_zz*xx_zz < epsilon:
return z, -x, 1, 0
else:
return z, -x, -xx_zz, -y
def rotationyx(self, cosay, sinay, cosax, sinax):
x, y, z = self
x, z = cosay*x + sinay*z, cosay*z - sinay*x
y, z = cosax*y - sinax*z, sinax*y + cosax*z
return self.__class__((x, y, z))
def rotationyx_normal(self, normal):
''' Same as:
self.rotationyx(*normal.angleyx())
'''
vx, vy, vz = self
nx, ny, nz = normal
nxx = nx*nx
nzz = nz*nz
nxx_zz = nxx + nzz
if nxx_zz < epsilon:
if ny*ny + nzz < epsilon:
pass
else:
vy = ny*vz - nz*vy
else:
if ny*ny + nxx_zz*nxx_zz < epsilon:
vx = nz*vx - nx*vz
else:
vy = ny*(nz*vz + nx*vx) - nxx_zz*vy
vx = nz*vx - nx*vz
return vx, vy
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