1

2# -*- coding: utf-8 -*-

3

4 u'''Triaxal ellipsoid classes I{ordered} L{Triaxial} and I{unordered} L{Triaxial_} and Jacobi

5 conformal projections L{JacobiConformal} and L{JacobiConformalSpherical}, transcoded from

6 I{Charles Karney}'s C++ class U{JacobiConformal<https://GeographicLib.SourceForge.io/C++/doc/

7 classGeographicLib_1_1JacobiConformal.html#details>} to pure Python and miscellaneous classes

8 L{BetaOmega2Tuple}, L{BetaOmega3Tuple}, L{Jacobi2Tuple} and L{TriaxialError}.

9

10 Copyright (C) U{Charles Karney<mailto:Karney@Alum.MIT.edu>} (2008-2023). For more information,

11 see the U{GeographicLib<https://GeographicLib.SourceForge.io>} documentation.

12

13@see: U{Geodesics on a triaxial ellipsoid<https://WikiPedia.org/wiki/Geodesics_on_an_ellipsoid#

14 Geodesics_on_a_triaxial_ellipsoid>} and U{Triaxial coordinate systems and their geometrical

15 interpretation<https://www.Topo.Auth.GR/wp-content/uploads/sites/111/2021/12/09_Panou.pdf>}.

16

17@var Triaxials.Amalthea: Triaxial(name='Amalthea', a=125000, b=73000, c=64000, e2ab=0.658944, e2bc=0.231375493, e2ac=0.737856, volume=2446253479595252, area=93239507787.490371704, area_p=93212299402.670425415)

18@var Triaxials.Ariel: Triaxial(name='Ariel', a=581100, b=577900, c=577700, e2ab=0.01098327, e2bc=0.000692042, e2ac=0.011667711, volume=812633172614203904, area=4211301462766.580078125, area_p=4211301574065.829589844)

19@var Triaxials.Earth: Triaxial(name='Earth', a=6378173.435, b=6378103.9, c=6356754.399999999, e2ab=0.000021804, e2bc=0.006683418, e2ac=0.006705077, volume=1083208241574987694080, area=510065911057441.0625, area_p=510065915922713.6875)

20@var Triaxials.Enceladus: Triaxial(name='Enceladus', a=256600, b=251400, c=248300, e2ab=0.040119337, e2bc=0.024509841, e2ac=0.06364586, volume=67094551514082248, area=798618496278.596679688, area_p=798619018175.109863281)

21@var Triaxials.Europa: Triaxial(name='Europa', a=1564130, b=1561230, c=1560930, e2ab=0.003704694, e2bc=0.000384275, e2ac=0.004087546, volume=15966575194402123776, area=30663773697323.51953125, area_p=30663773794562.45703125)

22@var Triaxials.Io: Triaxial(name='Io', a=1829400, b=1819300, c=1815700, e2ab=0.011011391, e2bc=0.003953651, e2ac=0.014921506, volume=25313121117889765376, area=41691875849096.7421875, area_p=41691877397441.2109375)

23@var Triaxials.Mars: Triaxial(name='Mars', a=3394600, b=3393300, c=3376300, e2ab=0.000765776, e2bc=0.009994646, e2ac=0.010752768, volume=162907283585817247744, area=144249140795107.4375, area_p=144249144150662.15625)

24@var Triaxials.Mimas: Triaxial(name='Mimas', a=207400, b=196800, c=190600, e2ab=0.09960581, e2bc=0.062015624, e2ac=0.155444317, volume=32587072869017956, area=493855762247.691894531, area_p=493857714107.9375)

25@var Triaxials.Miranda: Triaxial(name='Miranda', a=240400, b=234200, c=232900, e2ab=0.050915557, e2bc=0.011070811, e2ac=0.061422691, volume=54926187094835456, area=698880863325.756958008, area_p=698881306767.950317383)

26@var Triaxials.Moon: Triaxial(name='Moon', a=1735550, b=1735324, c=1734898, e2ab=0.000260419, e2bc=0.000490914, e2ac=0.000751206, volume=21886698675223740416, area=37838824729886.09375, area_p=37838824733332.2265625)

27@var Triaxials.Tethys: Triaxial(name='Tethys', a=535600, b=528200, c=525800, e2ab=0.027441672, e2bc=0.009066821, e2ac=0.036259685, volume=623086233855821440, area=3528073490771.394042969, area_p=3528074261832.738769531)

28@var Triaxials.WGS84_35: Triaxial(name='WGS84_35', a=6378172, b=6378102, c=6356752.314245179, e2ab=0.00002195, e2bc=0.006683478, e2ac=0.006705281, volume=1083207319768789942272, area=510065621722018.125, area_p=510065626587483.3125)

29'''

30# make sure int/int division yields float quotient, see .basics

31 from __future__ import division as _; del _ # PYCHOK semicolon

32

33 from pygeodesy.basics import isLatLon, isscalar, _zip, _ValueError

34 from pygeodesy.constants import EPS, EPS0, EPS02, EPS4, INT0, PI2, PI_3, PI4, \

35 _EPS2e4, float0_, isfinite, isnear1, _0_0, _0_5, \

36 _1_0, _N_1_0, _N_2_0, _4_0 # PYCHOK used!

37 from pygeodesy.datums import Datum, _spherical_datum, _WGS84, Ellipsoid, _EWGS84, Fmt

38# from pygeodesy.ellipsoids import Ellipsoid, _EWGS84 # from .datums

39# from pygeodesy.elliptic import Elliptic # _MODS

40# from pygeodesy.errors import _ValueError # from .basics

41 from pygeodesy.fmath import Fdot, fdot, fmean_, hypot, hypot_, norm2, sqrt0

42 from pygeodesy.fsums import _Fsumf_, fsumf_, fsum1f_

43 from pygeodesy.interns import NN, _a_, _b_, _beta_, _c_, _distant_, _finite_, \

44 _height_, _inside_, _near_, _negative_, _not_, \

45 _NOTEQUAL_, _null_, _opposite_, _outside_, _SPACE_, \

46 _spherical_, _too_, _x_, _y_

47# from pygeodesy.lazily import _ALL_LAZY, _ALL_MODS as _MODS # from .vector3d

48 from pygeodesy.named import _lazyNamedEnumItem as _lazy, _name__, _NamedEnum, \

49 _NamedEnumItem, _Pass

50 from pygeodesy.namedTuples import LatLon3Tuple, _NamedTupleTo, Vector3Tuple, \

51 Vector4Tuple

52 from pygeodesy.props import Property_RO, property_RO

53# from pygeodesy.streprs import Fmt # from .datums

54 from pygeodesy.units import Degrees, Float, Height_, Meter, Meter2, Meter3, \

55 Radians, Radius, Scalar_

56 from pygeodesy.utily import asin1, atan2d, km2m, m2km, SinCos2, sincos2d_

57 from pygeodesy.vector3d import _otherV3d, Vector3d, _ALL_LAZY, _MODS

58

59 from math import atan2, fabs, sqrt

60

61__all__ = _ALL_LAZY.triaxials

62__version__ = '24.06.09'

63

64_not_ordered_ = _not_('ordered')

65_omega_ = 'omega'

66_TRIPS = 269 # 48-55, Eberly 1074?

67

68

69 class _NamedTupleToX(_NamedTupleTo): # in .testNamedTuples

70 '''(INTERNAL) Base class for L{BetaOmega2Tuple},

71 L{BetaOmega3Tuple} and L{Jacobi2Tuple}.

72 '''

73 def _toDegrees(self, name, **toDMS_kwds):

74 '''(INTERNAL) Convert C{self[0:2]} to L{Degrees} or C{toDMS}.

75 '''

76 return self._toX3U(_NamedTupleTo._Degrees3, Degrees, name, *self, **toDMS_kwds)

77

78 def _toRadians(self, name):

79 '''(INTERNAL) Convert C{self[0:2]} to L{Radians}.

80 '''

81 return self._toX3U(_NamedTupleTo._Radians3, Radians, name, *self)

82

83 def _toX3U(self, _X3, U, name, a, b, *c, **kwds):

84 a, b, s = _X3(self, a, b, **kwds)

85 if s is None or name:

86 n = self._name__(name)

87 s = self.classof(a, b, *c, name=n).reUnit(U, U).toUnits()

88 return s

89

90

91 class BetaOmega2Tuple(_NamedTupleToX):

92 '''2-Tuple C{(beta, omega)} with I{ellipsoidal} lat- and

93 longitude C{beta} and C{omega} both in L{Radians} (or

94 L{Degrees}).

95 '''

96 _Names_ = (_beta_, _omega_)

97 _Units_ = (_Pass, _Pass)

98

99 def toDegrees(self, name=NN, **toDMS_kwds):

100 '''Convert this L{BetaOmega2Tuple} to L{Degrees} or C{toDMS}.

101

102 @kwarg name: Optional name (C{str}), overriding this name.

103

104 @return: L{BetaOmega2Tuple}C{(beta, omega)} with C{beta} and

105 C{omega} both in L{Degrees} or as L{toDMS} strings

106 provided some B{C{toDMS_kwds}} keyword arguments are

107 specified.

108 '''

109 return self._toDegrees(name, **toDMS_kwds)

110

111 def toRadians(self, **name):

112 '''Convert this L{BetaOmega2Tuple} to L{Radians}.

113

114 @kwarg name: Optional C{B{name}=NN} (C{str}), overriding this name.

115

116 @return: L{BetaOmega2Tuple}C{(beta, omega)} with C{beta} and C{omega}

117 both in L{Radians}.

118 '''

119 return self._toRadians(name)

120

121

122 class BetaOmega3Tuple(_NamedTupleToX):

123 '''3-Tuple C{(beta, omega, height)} with I{ellipsoidal} lat- and

124 longitude C{beta} and C{omega} both in L{Radians} (or L{Degrees})

125 and the C{height}, rather the (signed) I{distance} to the triaxial's

126 surface (measured along the radial line to the triaxial's center)

127 in C{meter}, conventionally.

128 '''

129 _Names_ = BetaOmega2Tuple._Names_ + (_height_,)

130 _Units_ = BetaOmega2Tuple._Units_ + ( Meter,)

131

132 def toDegrees(self, name=NN, **toDMS_kwds):

133 '''Convert this L{BetaOmega3Tuple} to L{Degrees} or C{toDMS}.

134

135 @kwarg name: Optional name (C{str}), overriding this name.

136

137 @return: L{BetaOmega3Tuple}C{(beta, omega, height)} with

138 C{beta} and C{omega} both in L{Degrees} or as

139 L{toDMS} strings provided some B{C{toDMS_kwds}}

140 keyword arguments are specified.

141 '''

142 return self._toDegrees(name, **toDMS_kwds)

143

144 def toRadians(self, **name):

145 '''Convert this L{BetaOmega3Tuple} to L{Radians}.

146

147 @kwarg name: Optional C{B{name}=NN} (C{str}), overriding this name.

148

149 @return: L{BetaOmega3Tuple}C{(beta, omega, height)} with C{beta}

150 and C{omega} both in L{Radians}.

151 '''

152 return self._toRadians(name)

153

154 def to2Tuple(self, **name):

155 '''Reduce this L{BetaOmega3Tuple} to a L{BetaOmega2Tuple}.

156

157 @kwarg name: Optional C{B{name}=NN} (C{str}), overriding this name.

158 '''

159 return BetaOmega2Tuple(*self[:2], name=self._name__(name))

160

161

162 class Jacobi2Tuple(_NamedTupleToX):

163 '''2-Tuple C{(x, y)} with a Jacobi Conformal C{x} and C{y}

164 projection, both in L{Radians} (or L{Degrees}).

165 '''

166 _Names_ = (_x_, _y_)

167 _Units_ = (_Pass, _Pass)

168

169 def toDegrees(self, name=NN, **toDMS_kwds):

170 '''Convert this L{Jacobi2Tuple} to L{Degrees} or C{toDMS}.

171

172 @kwarg name: Optional name (C{str}), overriding this name.

173

174 @return: L{Jacobi2Tuple}C{(x, y)} with C{x} and C{y} both

175 in L{Degrees} or as L{toDMS} strings provided some

176 B{C{toDMS_kwds}} keyword arguments are specified.

177 '''

178 return self._toDegrees(name, **toDMS_kwds)

179

180 def toRadians(self, **name):

181 '''Convert this L{Jacobi2Tuple} to L{Radians}.

182

183 @kwarg name: Optional C{B{name}=NN} (C{str}), overriding this name.

184

185 @return: L{Jacobi2Tuple}C{(x, y)} with C{x} and C{y} both in L{Radians}.

186 '''

187 return self._toRadians(name)

188

189

190 class Triaxial_(_NamedEnumItem):

191 '''I{Unordered} triaxial ellipsoid and base class.

192

193 Triaxial ellipsoids with right-handed semi-axes C{a}, C{b} and C{c}, oriented

194 such that the large principal ellipse C{ab} is the equator I{Z}=0, I{beta}=0,

195 while the small principal ellipse C{ac} is the prime meridian, plane I{Y}=0,

196 I{omega}=0.

197

198 The four umbilic points, C{abs}(I{omega}) = C{abs}(I{beta}) = C{PI/2}, lie on

199 the middle principal ellipse C{bc} in plane I{X}=0, I{omega}=C{PI/2}.

200

201 @note: I{Geodetic} C{lat}- and C{lon}gitudes are in C{degrees}, I{geodetic}

202 C{phi} and C{lam}bda are in C{radians}, but I{ellipsoidal} lat- and

203 longitude C{beta} and C{omega} are in L{Radians} by default (or in

204 L{Degrees} if converted).

205 '''

206 _ijk = _kji = None

207 _unordered = True

208

209 def __init__(self, a_triaxial, b=None, c=None, **name):

210 '''New I{unordered} L{Triaxial_}.

211

212 @arg a_triaxial: Large, C{X} semi-axis (C{scalar}, conventionally in

213 C{meter}) or an other L{Triaxial} or L{Triaxial_} instance.

214 @kwarg b: Middle, C{Y} semi-axis (C{meter}, same units as B{C{a}}), required

215 if C{B{a_triaxial} is scalar}, ignored otherwise.

216 @kwarg c: Small, C{Z} semi-axis (C{meter}, same units as B{C{a}}), required

217 if C{B{a_triaxial} is scalar}, ignored otherwise.

218 @kwarg name: Optional C{B{name}=NN} (C{str}).

219

220 @raise TriaxialError: Invalid semi-axis or -axes.

221 '''

222 try:

223 try:

224 a = a_triaxial

225 t = a._abc3

226 except AttributeError:

227 t = Radius(a=a), Radius(b=b), Radius(c=c)

228 except (TypeError, ValueError) as x:

229 raise TriaxialError(a=a, b=b, c=c, cause=x)

230 if name:

231 self.name = name

232

233 a, b, c = self._abc3 = t

234 if self._unordered: # == not isinstance(self, Triaxial)

235 s, _, t = sorted(t)

236 if not (isfinite(t) and s > 0):

237 raise TriaxialError(a=a, b=b, c=c) # txt=_invalid_

238 elif not (isfinite(a) and a >= b >= c > 0):

239 raise TriaxialError(a=a, b=b, c=c, txt=_not_ordered_)

240 elif not (a > c and self._a2c2 > 0 and self.e2ac > 0):

241 raise TriaxialError(a=a, c=c, e2ac=self.e2ac, txt=_spherical_)

242

243 def __str__(self):

244 return self.toStr()

245

246 @Property_RO

247 def a(self):

248 '''Get the (largest) C{x} semi-axis (C{meter}, conventionally).

249 '''

250 a, _, _ = self._abc3

251 return a

252

253 @Property_RO

254 def _a2b2(self):

255 '''(INTERNAL) Get C{a**2 - b**2} == E_sub_e**2.

256 '''

257 a, b, _ = self._abc3

258 return ((a - b) * (a + b)) if a != b else _0_0

259

260 @Property_RO

261 def _a2_b2(self):

262 '''(INTERNAL) Get C{(a/b)**2}.

263 '''

264 a, b, _ = self._abc3

265 return (a / b)**2 if a != b else _1_0

266

267 @Property_RO

268 def _a2c2(self):

269 '''(INTERNAL) Get C{a**2 - c**2} == E_sub_x**2.

270 '''

271 a, _, c = self._abc3

272 return ((a - c) * (a + c)) if a != c else _0_0

273

274 @Property_RO

275 def area(self):

276 '''Get the surface area (C{meter} I{squared}).

277 '''

278 c, b, a = sorted(self._abc3)

279 if a > c:

280 a = Triaxial(a, b, c).area if a > b else \

281 Ellipsoid(a, b=c).areax # a == b

282 else: # a == c == b

283 a = Meter2(area=a**2 * PI4)

284 return a

285

286 def area_p(self, p=1.6075):

287 '''I{Approximate} the surface area (C{meter} I{squared}).

288

289 @kwarg p: Exponent (C{scalar} > 0), 1.6 for near-spherical or 1.5849625007

290 for "near-flat" triaxials.

291

292 @see: U{Surface area<https://WikiPedia.org/wiki/Ellipsoid#Approximate_formula>}.

293 '''

294 a, b, c = self._abc3

295 if a == b == c:

296 a *= a

297 else:

298 _p = pow

299 a = _p(fmean_(_p(a * b, p), _p(a * c, p), _p(b * c, p)), _1_0 / p)

300 return Meter2(area_p=a * PI4)

301

302 @Property_RO

303 def b(self):

304 '''Get the (middle) C{y} semi-axis (C{meter}, same units as B{C{a}}).

305 '''

306 _, b, _ = self._abc3

307 return b

308

309 @Property_RO

310 def _b2c2(self):

311 '''(INTERNAL) Get C{b**2 - c**2} == E_sub_y**2.

312 '''

313 _, b, c = self._abc3

314 return ((b - c) * (b + c)) if b != c else _0_0

315

316 @Property_RO

317 def c(self):

318 '''Get the (smallest) C{z} semi-axis (C{meter}, same units as B{C{a}}).

319 '''

320 _, _, c = self._abc3

321 return c

322

323 @Property_RO

324 def _c2_b2(self):

325 '''(INTERNAL) Get C{(c/b)**2}.

326 '''

327 _, b, c = self._abc3

328 return (c / b)**2 if b != c else _1_0

329

330 @Property_RO

331 def e2ab(self):

332 '''Get the C{ab} ellipse' I{(1st) eccentricity squared} (C{scalar}), M{1 - (b/a)**2}.

333 '''

334 return Float(e2ab=(_1_0 - self._1e2ab) or _0_0)

335

336 @Property_RO

337 def _1e2ab(self):

338 '''(INTERNAL) Get C{1 - e2ab} == C{(b/a)**2}.

339 '''

340 a, b, _ = self._abc3

341 return (b / a)**2 if a != b else _1_0

342

343 @Property_RO

344 def e2ac(self):

345 '''Get the C{ac} ellipse' I{(1st) eccentricity squared} (C{scalar}), M{1 - (c/a)**2}.

346 '''

347 return Float(e2ac=(_1_0 - self._1e2ac) or _0_0)

348

349 @Property_RO

350 def _1e2ac(self):

351 '''(INTERNAL) Get C{1 - e2ac} == C{(c/a)**2}.

352 '''

353 a, _, c = self._abc3

354 return (c / a)**2 if a != c else _1_0

355

356 @Property_RO

357 def e2bc(self):

358 '''Get the C{bc} ellipse' I{(1st) eccentricity squared} (C{scalar}), M{1 - (c/b)**2}.

359 '''

360 return Float(e2bc=(_1_0 - self._1e2bc) or _0_0)

361

362 _1e2bc = _c2_b2 # C{1 - e2bc} == C{(c/b)**2}

363

364 @property_RO

365 def _Elliptic(self):

366 '''(INTERNAL) Get class L{Elliptic}, I{once}.

367 '''

368 Triaxial_._Elliptic = E = _MODS.elliptic.Elliptic # overwrite property_RO

369 return E

370

371 def hartzell4(self, pov, los=False, **name):

372 '''Compute the intersection of this triaxial's surface with a Line-Of-Sight

373 from a Point-Of-View in space.

374

375 @see: Function L{hartzell4<triaxials.hartzell4>} for further details.

376 '''

377 return hartzell4(pov, los=los, tri_biax=self, **name)

378

379 def height4(self, x_xyz, y=None, z=None, normal=True, eps=EPS, **name):

380 '''Compute the projection on and the height above or below this triaxial's surface.

381

382 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian}, L{Ecef9Tuple},

383 L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

384 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

385 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

386 @kwarg normal: If C{True} the projection is the I{normal, plumb} to the surface of,

387 otherwise the C{radial} line to the center of this triaxial (C{bool}).

388 @kwarg eps: Tolerance for root finding and validation (C{scalar}), use a negative

389 value to skip validation.

390 @kwarg name: Optional, overriding C{B{name}="heigh4"} (C{str}).

391

392 @return: L{Vector4Tuple}C{(x, y, z, h)} with the cartesian coordinates C{x}, C{y}

393 and C{z} of the projection on or the intersection with and with the height

394 C{h} above or below the triaxial's surface in C{meter}, conventionally.

395

396 @raise TriaxialError: Non-cartesian B{C{xyz}}, invalid B{C{eps}}, no convergence in

397 root finding or validation failed.

398

399 @see: Method L{Ellipsoid.height4} and I{Eberly}'s U{Distance from a Point to ...

400 <https://www.GeometricTools.com/Documentation/DistancePointEllipseEllipsoid.pdf>}.

401 '''

402 v, r = _otherV3d_(x_xyz, y, z), self.isSpherical

403

404 i, h = None, v.length

405 if h < EPS0: # EPS

406 x = y = z = _0_0

407 h -= min(self._abc3) # nearest

408 elif r: # .isSpherical

409 x, y, z = v.times(r / h).xyz

410 h -= r

411 else:

412 x, y, z = v.xyz

413 try:

414 if normal: # plumb to surface

415 x, y, z, h, i = _normalTo5(x, y, z, self, eps=eps)

416 else: # radial to center

417 x, y, z = self._radialTo3(z, hypot(x, y), y, x)

418 h = v.minus_(x, y, z).length

419 except Exception as e:

420 raise TriaxialError(x=x, y=y, z=z, cause=e)

421 if h > 0 and self.sideOf(v, eps=EPS0) < 0:

422 h = -h # below the surface

423 return Vector4Tuple(x, y, z, h, iteration=i,

424 name=_name__(name, name__=self.height4))

425

426 @Property_RO

427 def isOrdered(self):

428 '''Is this triaxial I{ordered} and I{not spherical} (C{bool})?

429 '''

430 a, b, c = self._abc3

431 return bool(a >= b > c) # b > c!

432

433 @Property_RO

434 def isSpherical(self):

435 '''Is this triaxial I{spherical} (C{Radius} or INT0)?

436 '''

437 a, b, c = self._abc3

438 return a if a == b == c else INT0

439

440 def _norm2(self, s, c, *a):

441 '''(INTERNAL) Normalize C{s} and C{c} iff not already.

442 '''

443 if fabs(_hypot21(s, c)) > EPS02:

444 s, c = norm2(s, c)

445 if a:

446 s, c = norm2(s * self.b, c * a[0])

447 return float0_(s, c)

448

449 def normal3d(self, x_xyz, y=None, z=None, length=_1_0):

450 '''Get a 3-D vector at a cartesian on and perpendicular to this triaxial's surface.

451

452 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

453 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

454 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

455 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

456 @kwarg length: Optional length and in-/outward direction (C{scalar}).

457

458 @return: A C{Vector3d(x_, y_, z_)} normalized to B{C{length}}, pointing

459 in- or outward for neg- respectively positive B{C{length}}.

460

461 @raise TriaxialError: Zero length cartesian or vector.

462

463 @note: Cartesian location C{(B{x}, B{y}, B{z})} must be on this triaxial's

464 surface, use method L{Triaxial.sideOf} to validate.

465 '''

466 # n = 2 * (x / a2, y / b2, z / c2)

467 # == 2 * (x, y * a2 / b2, z * a2 / c2) / a2 # iff ordered

468 # == 2 * (x, y / _1e2ab, z / _1e2ac) / a2

469 # == unit(x, y / _1e2ab, z / _1e2ac).times(length)

470 n = self._normal3d.times_(*_otherV3d_(x_xyz, y, z).xyz)

471 if n.length < EPS0:

472 raise TriaxialError(x=x_xyz, y=y, z=z, txt=_null_)

473 return n.times(length / n.length)

474

475 @Property_RO

476 def _normal3d(self):

477 '''(INTERNAL) Get M{Vector3d((d/a)**2, (d/b)**2, (d/c)**2)}, M{d = max(a, b, c)}.

478 '''

479 d = max(self._abc3)

480 t = tuple(((d / x)**2 if x != d else _1_0) for x in self._abc3)

481 return Vector3d(*t, name__=self.normal3d)

482

483 def _order3(self, *abc, **reverse): # reverse=False

484 '''(INTERNAL) Un-/Order C{a}, C{b} and C{c}.

485

486 @return: 3-Tuple C{(a, b, c)} ordered by or un-ordered

487 (reverse-ordered) C{ijk} if C{B{reverse}=True}.

488 '''

489 ijk = self._order_ijk(**reverse)

490 return _getitems(abc, *ijk) if ijk else abc

491

492 def _order3d(self, v, **reverse): # reverse=False

493 '''(INTERNAL) Un-/Order a C{Vector3d}.

494

495 @return: Vector3d(x, y, z) un-/ordered.

496 '''

497 ijk = self._order_ijk(**reverse)

498 return v.classof(*_getitems(v.xyz, *ijk)) if ijk else v

499

500 @Property_RO

501 def _ordered4(self):

502 '''(INTERNAL) Helper for C{_hartzell3} and C{_normalTo5}.

503 '''

504 def _order2(reverse, a, b, c):

505 '''(INTERNAL) Un-Order C{a}, C{b} and C{c}.

506

507 @return: 2-Tuple C{((a, b, c), ijk)} with C{a} >= C{b} >= C{c}

508 and C{ijk} a 3-tuple with the initial indices.

509 '''

510 i, j, k = 0, 1, 2 # range(3)

511 if a < b:

512 a, b, i, j = b, a, j, i

513 if a < c:

514 a, c, i, k = c, a, k, i

515 if b < c:

516 b, c, j, k = c, b, k, j

517 # reverse (k, j, i) since (a, b, c) is reversed-sorted

518 ijk = (k, j, i) if reverse else (None if i < j < k else (i, j, k))

519 return (a, b, c), ijk

520

521 abc, T = self._abc3, self

522 if not self.isOrdered:

523 abc, ijk = _order2(False, *abc)

524 if ijk:

525 _, kji = _order2(True, *ijk)

526 T = Triaxial_(*abc)

527 T._ijk, T._kji = ijk, kji

528 return abc + (T,)

529

530 def _order_ijk(self, reverse=False):

531 '''(INTERNAL) Get the un-/order indices.

532 '''

533 return self._kji if reverse else self._ijk

534

535 def _radialTo3(self, sbeta, cbeta, somega, comega):

536 '''(INTERNAL) I{Unordered} helper for C{.height4}.

537 '''

538 def _rphi(a, b, sphi, cphi):

539 # <https://WikiPedia.org/wiki/Ellipse#Polar_form_relative_to_focus>

540 # polar form: radius(phi) = a * b / hypot(a * sphi, b * cphi)

541 return (b / hypot(sphi, b / a * cphi)) if a > b else (

542 (a / hypot(cphi, a / b * sphi)) if a < b else a)

543

544 sa, ca = self._norm2(sbeta, cbeta)

545 sb, cb = self._norm2(somega, comega)

546

547 a, b, c = self._abc3

548 if a != b:

549 a = _rphi(a, b, sb, cb)

550 if a != c:

551 c = _rphi(a, c, sa, ca)

552 z, r = c * sa, c * ca

553 x, y = r * cb, r * sb

554 return x, y, z

555

556 def sideOf(self, x_xyz, y=None, z=None, eps=EPS4):

557 '''Is a cartesian above, below or on the surface of this triaxial?

558

559 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

560 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

561 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

562 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

563 @kwarg eps: Near-surface tolerance (C{scalar}, distance I{squared}).

564

565 @return: C{INT0} if C{(B{x}, B{y}, B{z})} is near this triaxial's surface

566 within tolerance B{C{eps}}, otherwise a signed, radial, normalized

567 distance I{squared} (C{float}), negative or positive for in-

568 respectively outside this triaxial.

569

570 @see: Methods L{Triaxial.height4} and L{Triaxial.normal3d}.

571 '''

572 return _sideOf(_otherV3d_(x_xyz, y, z).xyz, self._abc3, eps=eps)

573

574 def toEllipsoid(self, **name):

575 '''Convert this triaxial to an L{Ellipsoid}, provided 2 axes match.

576

577 @kwarg name: Optional, overriding C{B{name}=NN} (C{str})=.

578

579 @return: An L{Ellipsoid} with north along this C{Z} axis if C{a == b},

580 this C{Y} axis if C{a == c} or this C{X} axis if C{b == c}.

581

582 @raise TriaxialError: This C{a != b}, C{b != c} and C{c != a}.

583

584 @see: Method L{Ellipsoid.toTriaxial}.

585 '''

586 a, b, c = self._abc3

587 if a == b:

588 b = c # N = c-Z

589 elif b == c: # N = a-X

590 a, b = b, a

591 elif a != c: # N = b-Y

592 t = _SPACE_(_a_, _NOTEQUAL_, _b_, _NOTEQUAL_, _c_)

593 raise TriaxialError(a=a, b=b, c=c, txt=t)

594 return Ellipsoid(a, b=b, name=self._name__(name))

595

596 def toStr(self, prec=9, name=NN, **unused): # PYCHOK signature

597 '''Return this C{Triaxial} as a string.

598

599 @kwarg prec: Precision, number of decimal digits (0..9).

600 @kwarg name: Optional, overriding C{B{name}=NN} (C{str})

601 or C{None} to exclude this triaxial's name.

602

603 @return: This C{Triaxial}'s attributes (C{str}).

604 '''

605 T = Triaxial_

606 t = T.a,

607 J = JacobiConformalSpherical

608 t += (J.ab, J.bc) if isinstance(self, J) else (T.b, T.c)

609 t += T.e2ab, T.e2bc, T.e2ac

610 J = JacobiConformal

611 if isinstance(self, J):

612 t += J.xyQ2,

613 t += T.volume, T.area

614 return self._instr(name, prec, props=t, area_p=self.area_p()) # __name__

615

616 @Property_RO

617 def volume(self):

618 '''Get the volume (C{meter**3}), M{4 / 3 * PI * a * b * c}.

619 '''

620 a, b, c = self._abc3

621 return Meter3(volume=a * b * c * PI_3 * _4_0)

622

623

624 class Triaxial(Triaxial_):

625 '''I{Ordered} triaxial ellipsoid.

626

627 @see: L{Triaxial_} for more information.

628 '''

629 _unordered = False

630

631 def __init__(self, a_triaxial, b=None, c=None, **name):

632 '''New I{ordered} L{Triaxial}.

633

634 @arg a_triaxial: Largest semi-axis (C{scalar}, conventionally in C{meter})

635 or an other L{Triaxial} or L{Triaxial_} instance.

636 @kwarg b: Middle semi-axis (C{meter}, same units as B{C{a}}), required

637 if C{B{a_triaxial} is scalar}, ignored otherwise.

638 @kwarg c: Smallest semi-axis (C{meter}, same units as B{C{a}}), required

639 if C{B{a_triaxial} is scalar}, ignored otherwise.

640 @kwarg name: Optional C{B{name}=NN} (C{str}).

641

642 @note: The semi-axes must be ordered as C{B{a} >= B{b} >= B{c} > 0} and

643 must be ellipsoidal, C{B{a} > B{c}}.

644

645 @raise TriaxialError: Semi-axes not ordered, spherical or invalid.

646 '''

647 Triaxial_.__init__(self, a_triaxial, b=b, c=c, **name)

648

649 @Property_RO

650 def _a2b2_a2c2(self):

651 '''@see: Methods C{.forwardBetaOmega} and C{._k2_kp2}.

652 '''

653 return self._a2b2 / self._a2c2

654

655 @Property_RO

656 def area(self):

657 '''Get the surface area (C{meter} I{squared}).

658

659 @see: U{Surface area<https://WikiPedia.org/wiki/Ellipsoid#Surface_area>}.

660 '''

661 a, b, c = self._abc3

662 if a != b:

663 kp2, k2 = self._k2_kp2 # swapped!

664 aE = self._Elliptic(k2, _0_0, kp2, _1_0)

665 c2 = self._1e2ac # cos(phi)**2 = (c/a)**2

666 s = sqrt(self.e2ac) # sin(phi)**2 = 1 - c2

667 r = asin1(s) # phi = atan2(sqrt(c2), s)

668 b *= fsum1f_(aE.fE(r) * s, c / a * c / b,

669 aE.fF(r) * c2 / s)

670 a = Meter2(area=a * b * PI2)

671 else: # a == b > c

672 a = Ellipsoid(a, b=c).areax

673 return a

674

675 def _exyz3(self, u):

676 '''(INTERNAL) Helper for C{.forwardBetOmg}.

677 '''

678 if u > 0:

679 u2 = u**2

680 x = u * sqrt0(_1_0 + self._a2c2 / u2, Error=TriaxialError)

681 y = u * sqrt0(_1_0 + self._b2c2 / u2, Error=TriaxialError)

682 else:

683 x = y = u = _0_0

684 return x, y, u

685

686 def forwardBetaOmega(self, beta, omega, height=0, **name):

687 '''Convert I{ellipsoidal} lat- and longitude C{beta}, C{omega}

688 and height to cartesian.

689

690 @arg beta: Ellipsoidal latitude (C{radians} or L{Degrees}).

691 @arg omega: Ellipsoidal longitude (C{radians} or L{Degrees}).

692 @arg height: Height above or below the ellipsoid's surface (C{meter}, same

693 units as this triaxial's C{a}, C{b} and C{c} semi-axes).

694 @kwarg name: Optional C{B{name}=NN} (C{str}).

695

696 @return: A L{Vector3Tuple}C{(x, y, z)}.

697

698 @see: Method L{Triaxial.reverseBetaOmega} and U{Expressions (23-25)<https://

699 www.Topo.Auth.GR/wp-content/uploads/sites/111/2021/12/09_Panou.pdf>}.

700 '''

701 if height:

702 h = self._Height(height)

703 x, y, z = self._exyz3(h + self.c)

704 else:

705 x, y, z = self._abc3 # == self._exyz3(self.c)

706 if z: # and x and y:

707 sa, ca = SinCos2(beta)

708 sb, cb = SinCos2(omega)

709

710 r = self._a2b2_a2c2

711 x *= cb * sqrt0(ca**2 + r * sa**2, Error=TriaxialError)

712 y *= ca * sb

713 z *= sa * sqrt0(_1_0 - r * cb**2, Error=TriaxialError)

714 return Vector3Tuple(x, y, z, **name)

715

716 def forwardBetaOmega_(self, sbeta, cbeta, somega, comega, **name):

717 '''Convert I{ellipsoidal} lat- and longitude C{beta} and C{omega}

718 to cartesian coordinates I{on the triaxial's surface}.

719

720 @arg sbeta: Ellipsoidal latitude C{sin(beta)} (C{scalar}).

721 @arg cbeta: Ellipsoidal latitude C{cos(beta)} (C{scalar}).

722 @arg somega: Ellipsoidal longitude C{sin(omega)} (C{scalar}).

723 @arg comega: Ellipsoidal longitude C{cos(omega)} (C{scalar}).

724 @kwarg name: Optional C{B{name}=NN} (C{str}).

725

726 @return: A L{Vector3Tuple}C{(x, y, z)} on the surface.

727

728 @raise TriaxialError: This triaxial is near-spherical.

729

730 @see: Method L{Triaxial.reverseBetaOmega}, U{Triaxial ellipsoid coordinate

731 system<https://WikiPedia.org/wiki/Geodesics_on_an_ellipsoid#

732 Triaxial_ellipsoid_coordinate_system>} and U{expressions (23-25)<https://

733 www.Topo.Auth.GR/wp-content/uploads/sites/111/2021/12/09_Panou.pdf>}.

734 '''

735 t = self._radialTo3(sbeta, cbeta, somega, comega)

736 return Vector3Tuple(*t, **name)

737

738 def forwardCartesian(self, x_xyz, y=None, z=None, **normal_eps_name):

739 '''Project a cartesian on this triaxial.

740

741 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

742 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

743 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

744 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

745 @kwarg normal_eps_name: Optional keyword arguments C{B{normal}=True},

746 C{B{eps}=EPS} and overriding C{B{name}="height4"} (C{str}),

747 see method L{Triaxial.height4}.

748

749 @see: Method L{Triaxial.height4} for further information and method

750 L{Triaxial.reverseCartesian} to reverse the projection.

751 '''

752 return self.height4(x_xyz, y, z, **normal_eps_name)

753

754 def forwardLatLon(self, lat, lon, height=0, **name):

755 '''Convert I{geodetic} lat-, longitude and heigth to cartesian.

756

757 @arg lat: Geodetic latitude (C{degrees}).

758 @arg lon: Geodetic longitude (C{degrees}).

759 @arg height: Height above the ellipsoid (C{meter}, same units

760 as this triaxial's C{a}, C{b} and C{c} axes).

761 @kwarg name: Optional C{B{name}=NN} (C{str}).

762

763 @return: A L{Vector3Tuple}C{(x, y, z)}.

764

765 @see: Method L{Triaxial.reverseLatLon} and U{Expressions (9-11)<https://

766 www.Topo.Auth.GR/wp-content/uploads/sites/111/2021/12/09_Panou.pdf>}.

767 '''

768 return self._forwardLatLon3(height, name, *sincos2d_(lat, lon))

769

770 def forwardLatLon_(self, slat, clat, slon, clon, height=0, **name):

771 '''Convert I{geodetic} lat-, longitude and heigth to cartesian.

772

773 @arg slat: Geodetic latitude C{sin(lat)} (C{scalar}).

774 @arg clat: Geodetic latitude C{cos(lat)} (C{scalar}).

775 @arg slon: Geodetic longitude C{sin(lon)} (C{scalar}).

776 @arg clon: Geodetic longitude C{cos(lon)} (C{scalar}).

777 @arg height: Height above the ellipsoid (C{meter}, same units

778 as this triaxial's axes C{a}, C{b} and C{c}).

779 @kwarg name: Optional C{B{name}=NN} (C{str}).

780

781 @return: A L{Vector3Tuple}C{(x, y, z)}.

782

783 @see: Method L{Triaxial.reverseLatLon} and U{Expressions (9-11)<https://

784 www.Topo.Auth.GR/wp-content/uploads/sites/111/2021/12/09_Panou.pdf>}.

785 '''

786 sa, ca = self._norm2(slat, clat)

787 sb, cb = self._norm2(slon, clon)

788 return self._forwardLatLon3(height, name, sa, ca, sb, cb)

789

790 def _forwardLatLon3(self, height, name, sa, ca, sb, cb): # name always **name

791 '''(INTERNAL) Helper for C{.forwardLatLon} and C{.forwardLatLon_}.

792 '''

793 ca_x_sb = ca * sb

794 h = self._Height(height)

795 # 1 - (1 - (c/a)**2) * sa**2 - (1 - (b/a)**2) * ca**2 * sb**2

796 t = fsumf_(_1_0, -self.e2ac * sa**2, -self.e2ab * ca_x_sb**2)

797 n = self.a / sqrt0(t, Error=TriaxialError) # prime vertical

798 x = (h + n) * ca * cb

799 y = (h + n * self._1e2ab) * ca_x_sb

800 z = (h + n * self._1e2ac) * sa

801 return Vector3Tuple(x, y, z, **name)

802

803 def _Height(self, height):

804 '''(INTERNAL) Validate a C{height}.

805 '''

806 return Height_(height=height, low=-self.c, Error=TriaxialError)

807

808 @Property_RO

809 def _k2_kp2(self):

810 '''(INTERNAL) Get C{k2} and C{kp2} for C{._xE}, C{._yE} and C{.area}.

811 '''

812 # k2 = a2b2 / a2c2 * c2_b2

813 # kp2 = b2c2 / a2c2 * a2_b2

814 # b2 = b**2

815 # xE = Elliptic(k2, -a2b2 / b2, kp2, a2_b2)

816 # yE = Elliptic(kp2, +b2c2 / b2, k2, c2_b2)

817 # aE = Elliptic(kp2, 0, k2, 1)

818 return (self._a2b2_a2c2 * self._c2_b2,

819 self._b2c2 / self._a2c2 * self._a2_b2)

820

821 def _radialTo3(self, sbeta, cbeta, somega, comega):

822 '''(INTERNAL) Convert I{ellipsoidal} lat- and longitude C{beta} and

823 C{omega} to cartesian coordinates I{on the triaxial's surface},

824 also I{ordered} helper for C{.height4}.

825 '''

826 sa, ca = self._norm2(sbeta, cbeta)

827 sb, cb = self._norm2(somega, comega)

828

829 b2_a2 = self._1e2ab # == (b/a)**2

830 c2_a2 = -self._1e2ac # == -(c/a)**2

831 a2c2_a2 = self. e2ac # (a**2 - c**2) / a**2 == 1 - (c/a)**2

832

833 x2 = _Fsumf_(_1_0, -b2_a2 * sa**2, c2_a2 * ca**2).fover(a2c2_a2)

834 z2 = _Fsumf_(c2_a2, sb**2, b2_a2 * cb**2).fover(a2c2_a2)

835

836 x, y, z = self._abc3

837 x *= cb * sqrt0(x2, Error=TriaxialError)

838 y *= ca * sb

839 z *= sa * sqrt0(z2, Error=TriaxialError)

840 return x, y, z

841

842 def reverseBetaOmega(self, x_xyz, y=None, z=None, **name):

843 '''Convert cartesian to I{ellipsoidal} lat- and longitude, C{beta}, C{omega}

844 and height.

845

846 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

847 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

848 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

849 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

850 @kwarg name: Optional C{B{name}=NN} (C{str}).

851

852 @return: A L{BetaOmega3Tuple}C{(beta, omega, height)} with C{beta} and

853 C{omega} in L{Radians} and (radial) C{height} in C{meter}, same

854 units as this triaxial's axes.

855

856 @see: Methods L{Triaxial.forwardBetaOmega} and L{Triaxial.forwardBetaOmega_}

857 and U{Expressions (21-22)<https://www.Topo.Auth.GR/wp-content/uploads/

858 sites/111/2021/12/09_Panou.pdf>}.

859 '''

860 v = _otherV3d_(x_xyz, y, z)

861 a, b, h = self._reverseLatLon3(v, atan2, v, self.forwardBetaOmega_)

862 return BetaOmega3Tuple(Radians(beta=a), Radians(omega=b), h, **name)

863

864 def reverseCartesian(self, x_xyz, y=None, z=None, h=0, normal=True, eps=_EPS2e4, **name):

865 '''"Unproject" a cartesian on to a cartesion I{off} this triaxial's surface.

866

867 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

868 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

869 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

870 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

871 @arg h: Height above or below this triaxial's surface (C{meter}, same units

872 as the axes).

873 @kwarg normal: If C{True} the height is C{normal} to the surface, otherwise

874 C{radially} to the center of this triaxial (C{bool}).

875 @kwarg eps: Tolerance for surface test (C{scalar}).

876 @kwarg name: Optional C{B{name}=NN} (C{str}).

877

878 @return: A L{Vector3Tuple}C{(x, y, z)}.

879

880 @raise TrialError: Cartesian C{(x, y, z)} not on this triaxial's surface.

881

882 @see: Methods L{Triaxial.forwardCartesian} and L{Triaxial.height4}.

883 '''

884 v = _otherV3d_(x_xyz, y, z, **name)

885 s = _sideOf(v.xyz, self._abc3, eps=eps)

886 if s: # PYCHOK no cover

887 t = _SPACE_((_inside_ if s < 0 else _outside_), self.toRepr())

888 raise TriaxialError(eps=eps, sideOf=s, x=v.x, y=v.y, z=v.z, txt=t)

889

890 if h:

891 if normal:

892 v = v.plus(self.normal3d(*v.xyz, length=h))

893 elif v.length > EPS0:

894 v = v.times(_1_0 + (h / v.length))

895 return v.xyz # Vector3Tuple

896

897 def reverseLatLon(self, x_xyz, y=None, z=None, **name):

898 '''Convert cartesian to I{geodetic} lat-, longitude and height.

899

900 @arg x_xyz: X component (C{scalar}) or a cartesian (C{Cartesian},

901 L{Ecef9Tuple}, L{Vector3d}, L{Vector3Tuple} or L{Vector4Tuple}).

902 @kwarg y: Y component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

903 @kwarg z: Z component (C{scalar}), required if B{C{x_xyz}} if C{scalar}.

904 @kwarg name: Optional C{B{name}=NN} (C{str}).

905

906 @return: A L{LatLon3Tuple}C{(lat, lon, height)} with C{lat} and C{lon}

907 in C{degrees} and (radial) C{height} in C{meter}, same units

908 as this triaxial's axes.

909

910 @see: Methods L{Triaxial.forwardLatLon} and L{Triaxial.forwardLatLon_}

911 and U{Expressions (4-5)<https://www.Topo.Auth.GR/wp-content/uploads/

912 sites/111/2021/12/09_Panou.pdf>}.

913 '''

914 v = _otherV3d_(x_xyz, y, z)

915 s = v.times_(self._1e2ac, # == 1 - e_sub_x**2

916 self._1e2bc, # == 1 - e_sub_y**2

917 _1_0)

918 a, b, h = self._reverseLatLon3(s, atan2d, v, self.forwardLatLon_)

919 return LatLon3Tuple(Degrees(lat=a), Degrees(lon=b), h, **name)

920

921 def _reverseLatLon3(self, s, atan2_, v, forward_):

922 '''(INTERNAL) Helper for C{.reverseBetOmg} and C{.reverseLatLon}.

923 '''

924 x, y, z = s.xyz

925 d = hypot( x, y)

926 a = atan2_(z, d)

927 b = atan2_(y, x)

928 h = v.minus_(*forward_(z, d, y, x)).length

929 return a, b, h

930

931

932 class JacobiConformal(Triaxial):

933 '''This is a conformal projection of a triaxial ellipsoid to a plane in which the

934 C{X} and C{Y} grid lines are straight.

935

936 Ellipsoidal coordinates I{beta} and I{omega} are converted to Jacobi Conformal

937 I{y} respectively I{x} separately. Jacobi's coordinates have been multiplied

938 by C{sqrt(B{a}**2 - B{c}**2) / (2 * B{b})} so that the customary results are

939 returned in the case of an ellipsoid of revolution.

940

941 Copyright (C) U{Charles Karney<mailto:Karney@Alum.MIT.edu>} (2014-2023) and

942 licensed under the MIT/X11 License.

943

944 @note: This constructor can I{not be used to specify a sphere}, see alternate

945 L{JacobiConformalSpherical}.

946

947 @see: L{Triaxial}, C++ class U{JacobiConformal<https://GeographicLib.SourceForge.io/

948 C++/doc/classGeographicLib_1_1JacobiConformal.html#details>}, U{Jacobi's conformal

949 projection<https://GeographicLib.SourceForge.io/C++/doc/jacobi.html>} and Jacobi,

950 C. G. J. I{U{Vorlesungen über Dynamik<https://Books.Google.com/books?

951 id=ryEOAAAAQAAJ&pg=PA212>}}, page 212ff.

952 '''

953

954 @Property_RO

955 def _xE(self):

956 '''(INTERNAL) Get the x-elliptic function.

957 '''

958 k2, kp2 = self._k2_kp2

959 # -a2b2 / b2 == (b2 - a2) / b2 == 1 - a2 / b2 == 1 - a2_b2

960 return self._Elliptic(k2, _1_0 - self._a2_b2, kp2, self._a2_b2)

961

962 def xR(self, omega):

963 '''Compute a Jacobi Conformal C{x} projection.

964

965 @arg omega: Ellipsoidal longitude (C{radians} or L{Degrees}).

966

967 @return: The C{x} projection (L{Radians}).

968 '''

969 return self.xR_(*SinCos2(omega))

970

971 def xR_(self, somega, comega):

972 '''Compute a Jacobi Conformal C{x} projection.

973

974 @arg somega: Ellipsoidal longitude C{sin(omega)} (C{scalar}).

975 @arg comega: Ellipsoidal longitude C{cos(omega)} (C{scalar}).

976

977 @return: The C{x} projection (L{Radians}).

978 '''

979 s, c = self._norm2(somega, comega, self.a)

980 return Radians(x=self._xE.fPi(s, c) * self._a2_b2)

981

982 @Property_RO

983 def xyQ2(self):

984 '''Get the Jacobi Conformal quadrant size (L{Jacobi2Tuple}C{(x, y)}).

985 '''

986 return Jacobi2Tuple(Radians(x=self._a2_b2 * self._xE.cPi),

987 Radians(y=self._c2_b2 * self._yE.cPi),

988 name=JacobiConformal.xyQ2.name)

989

990 def xyR2(self, beta, omega, **name):

991 '''Compute a Jacobi Conformal C{x} and C{y} projection.

992

993 @arg beta: Ellipsoidal latitude (C{radians} or L{Degrees}).

994 @arg omega: Ellipsoidal longitude (C{radians} or L{Degrees}).

995 @kwarg name: Optional, overriding C{B{name}="xyR2"} (C{str}).

996

997 @return: A L{Jacobi2Tuple}C{(x, y)}.

998 '''

999 return self.xyR2_(*(SinCos2(beta) + SinCos2(omega)),

1000 name=_name__(name, name__=self.xyR2))

1001

1002 def xyR2_(self, sbeta, cbeta, somega, comega, **name):

1003 '''Compute a Jacobi Conformal C{x} and C{y} projection.

1004

1005 @arg sbeta: Ellipsoidal latitude C{sin(beta)} (C{scalar}).

1006 @arg cbeta: Ellipsoidal latitude C{cos(beta)} (C{scalar}).

1007 @arg somega: Ellipsoidal longitude C{sin(omega)} (C{scalar}).

1008 @arg comega: Ellipsoidal longitude C{cos(omega)} (C{scalar}).

1009 @kwarg name: Optional, overriding C{B{name}="xyR2_"} (C{str}).

1010

1011 @return: A L{Jacobi2Tuple}C{(x, y)}.

1012 '''

1013 return Jacobi2Tuple(self.xR_(somega, comega),

1014 self.yR_(sbeta, cbeta),

1015 name=_name__(name, name__=self.xyR2_))

1016

1017 @Property_RO

1018 def _yE(self):

1019 '''(INTERNAL) Get the x-elliptic function.

1020 '''

1021 kp2, k2 = self._k2_kp2 # swapped!

1022 # b2c2 / b2 == (b2 - c2) / b2 == 1 - c2 / b2 == e2bc

1023 return self._Elliptic(k2, self.e2bc, kp2, self._c2_b2)

1024

1025 def yR(self, beta):

1026 '''Compute a Jacobi Conformal C{y} projection.

1027

1028 @arg beta: Ellipsoidal latitude (C{radians} or L{Degrees}).

1029

1030 @return: The C{y} projection (L{Radians}).

1031 '''

1032 return self.yR_(*SinCos2(beta))

1033

1034 def yR_(self, sbeta, cbeta):

1035 '''Compute a Jacobi Conformal C{y} projection.

1036

1037 @arg sbeta: Ellipsoidal latitude C{sin(beta)} (C{scalar}).

1038 @arg cbeta: Ellipsoidal latitude C{cos(beta)} (C{scalar}).

1039

1040 @return: The C{y} projection (L{Radians}).

1041 '''

1042 s, c = self._norm2(sbeta, cbeta, self.c)

1043 return Radians(y=self._yE.fPi(s, c) * self._c2_b2)

1044

1045

1046 class JacobiConformalSpherical(JacobiConformal):

1047 '''An alternate, I{spherical} L{JacobiConformal} projection.

1048

1049 @see: L{JacobiConformal} for other and more details.

1050 '''

1051 _ab = _bc = 0

1052

1053 def __init__(self, radius_triaxial, ab=0, bc=0, **name):

1054 '''New L{JacobiConformalSpherical}.

1055

1056 @arg radius_triaxial: Radius (C{scalar}, conventionally in

1057 C{meter}) or an other L{JacobiConformalSpherical},

1058 L{JacobiConformal} or ordered L{Triaxial}.

1059 @kwarg ab: Relative magnitude of C{B{a} - B{b}} (C{meter},

1060 same units as C{scalar B{radius}}.

1061 @kwarg bc: Relative magnitude of C{B{b} - B{c}} (C{meter},

1062 same units as C{scalar B{radius}}.

1063 @kwarg name: Optional C{B{name}=NN} (C{str}).

1064

1065 @raise TriaxialError: Invalid B{C{radius_triaxial}}, negative

1066 B{C{ab}}, negative B{C{bc}} or C{(B{ab}

1067 + B{bc})} not positive.

1068

1069 @note: If B{C{radius_triaxial}} is a L{JacobiConformalSpherical}

1070 and if B{C{ab}} and B{C{bc}} are both zero or C{None},

1071 the B{C{radius_triaxial}}'s C{ab}, C{bc}, C{a}, C{b}

1072 and C{c} are copied.

1073 '''

1074 try:

1075 r = radius_triaxial

1076 if isinstance(r, Triaxial): # ordered only

1077 t = r._abc3

1078 j = isinstance(r, JacobiConformalSpherical) and not bool(ab or bc)

1079 else:

1080 t = (Radius(radius=r),) * 3

1081 j = False

1082 self._ab = r.ab if j else Scalar_(ab=ab) # low=0

1083 self._bc = r.bc if j else Scalar_(bc=bc) # low=0

1084 if (self.ab + self.bc) <= 0:

1085 raise ValueError(_negative_)

1086 a, _, c = self._abc3 = t

1087 if not (a >= c and isfinite(self._a2b2)

1088 and isfinite(self._a2c2)):

1089 raise ValueError(_not_(_finite_))

1090 except (TypeError, ValueError) as x:

1091 raise TriaxialError(radius_triaxial=r, ab=ab, bc=bc, cause=x)

1092 if name:

1093 self.name = name

1094

1095 @Property_RO

1096 def ab(self):

1097 '''Get relative magnitude C{ab} (C{meter}, same units as B{C{a}}).

1098 '''

1099 return self._ab

1100

1101 @Property_RO

1102 def _a2b2(self):

1103 '''(INTERNAL) Get C{a**2 - b**2} == ab * (a + b).

1104 '''

1105 a, b, _ = self._abc3

1106 return self.ab * (a + b)

1107

1108 @Property_RO

1109 def _a2c2(self):

1110 '''(INTERNAL) Get C{a**2 - c**2} == a2b2 + b2c2.

1111 '''

1112 return self._a2b2 + self._b2c2

1113

1114 @Property_RO

1115 def bc(self):

1116 '''Get relative magnitude C{bc} (C{meter}, same units as B{C{a}}).

1117 '''

1118 return self._bc

1119

1120 @Property_RO

1121 def _b2c2(self):

1122 '''(INTERNAL) Get C{b**2 - c**2} == bc * (b + c).

1123 '''

1124 _, b, c = self._abc3

1125 return self.bc * (b + c)

1126

1127 @Property_RO

1128 def radius(self):

1129 '''Get radius (C{meter}, conventionally).

1130 '''

1131 return self.a

1132

1133

1134 class TriaxialError(_ValueError):

1135 '''Raised for L{Triaxial} issues.

1136 '''

1137 pass # ...

1138

1139

1140 class Triaxials(_NamedEnum):

1141 '''(INTERNAL) L{Triaxial} registry, I{must} be a sub-class

1142 to accommodate the L{_LazyNamedEnumItem} properties.

1143 '''

1144 def _Lazy(self, *abc, **name):

1145 '''(INTERNAL) Instantiate the C{Triaxial}.

1146 '''

1147 a, b, c = map(km2m, abc)

1148 return Triaxial(a, b, c, **name)

1149

1150 Triaxials = Triaxials(Triaxial, Triaxial_) # PYCHOK singleton

1151'''Some pre-defined L{Triaxial}s, all I{lazily} instantiated.'''

1152# <https://ArxIV.org/pdf/1909.06452.pdf> Table 1 Semi-axes in Km

1153# <https://www.JPS.NASA.gov/education/images/pdf/ss-moons.pdf>

1154# <https://link.Springer.com/article/10.1007/s00190-022-01650-9>

1155_abc84_35 = (_EWGS84.a + 35), (_EWGS84.a - 35), _EWGS84.b

1156 Triaxials._assert( # a (Km) b (Km) c (Km) planet

1157 Amalthea = _lazy('Amalthea', 125.0, 73.0, 64), # Jupiter

1158 Ariel = _lazy('Ariel', 581.1, 577.9, 577.7), # Uranus

1159 Earth = _lazy('Earth', 6378.173435, 6378.1039, 6356.7544),

1160 Enceladus = _lazy('Enceladus', 256.6, 251.4, 248.3), # Saturn

1161 Europa = _lazy('Europa', 1564.13, 1561.23, 1560.93), # Jupiter

1162 Io = _lazy('Io', 1829.4, 1819.3, 1815.7), # Jupiter

1163 Mars = _lazy('Mars', 3394.6, 3393.3, 3376.3),

1164 Mimas = _lazy('Mimas', 207.4, 196.8, 190.6), # Saturn

1165 Miranda = _lazy('Miranda', 240.4, 234.2, 232.9), # Uranus

1166 Moon = _lazy('Moon', 1735.55, 1735.324, 1734.898), # Earth

1167 Tethys = _lazy('Tethys', 535.6, 528.2, 525.8), # Saturn

1168 WGS84_35 = _lazy('WGS84_35', *map(m2km, _abc84_35)))

1169 del _abc84_35, _EWGS84

1170

1171

1172 def _getitems(items, *indices):

1173 '''(INTERNAL) Get the C{items} at the given I{indices}.

1174

1175 @return: C{Type(items[i] for i in indices)} with

1176 C{Type = type(items)}, any C{type} having

1177 the special method C{__getitem__}.

1178 '''

1179 return type(items)(map(items.__getitem__, indices))

1180

1181

1182 def _hartzell3(pov, los, Tun): # in .Ellipsoid.hartzell4, .formy.hartzell

1183 '''(INTERNAL) Hartzell's "Satellite Line-of-Sight Intersection ...",

1184 formula from a Point-Of-View to an I{un-/ordered} Triaxial.

1185 '''

1186 def _toUvwV3d(los, pov):

1187 try: # pov must be LatLon or Cartesian if los is a Los

1188 v = los.toUvw(pov)

1189 except (AttributeError, TypeError):

1190 v = _otherV3d(los=los)

1191 return v

1192

1193 p3 = _otherV3d(pov=pov.toCartesian() if isLatLon(pov) else pov)

1194 if los is True: # normal

1195 a, b, c, d, i = _normalTo5(p3.x, p3.y, p3.z, Tun)

1196 return type(p3)(a, b, c), d, i

1197

1198 u3 = p3.negate() if los is False or los is None else _toUvwV3d(los, pov)

1199

1200 a, b, c, T = Tun._ordered4

1201

1202 a2 = a**2 # largest, factored out

1203 b2, p2 = (b**2, T._1e2ab) if b != a else (a2, _1_0)

1204 c2, q2 = (c**2, T._1e2ac) if c != a else (a2, _1_0)

1205

1206 p3 = T._order3d(p3)

1207 u3 = T._order3d(u3).unit() # unit vector, opposing signs

1208

1209 x2, y2, z2 = p3.x2y2z2 # p3.times_(p3).xyz

1210 ux, vy, wz = u3.times_(p3).xyz

1211 u2, v2, w2 = u3.x2y2z2 # u3.times_(u3).xyz

1212

1213 t = (p2 * c2), c2, b2

1214 m = fdot(t, u2, v2, w2) # a2 factored out

1215 if m < EPS0: # zero or near-null LOS vector

1216 raise _ValueError(_near_(_null_))

1217

1218 r = fsumf_(b2 * w2, c2 * v2, -v2 * z2, vy * wz * 2,

1219 -w2 * y2, -u2 * y2 * q2, -u2 * z2 * p2, ux * wz * 2 * p2,

1220 -w2 * x2 * p2, b2 * u2 * q2, -v2 * x2 * q2, ux * vy * 2 * q2)

1221 if r > 0: # a2 factored out

1222 r = sqrt(r) * b * c # == a * a * b * c / a2

1223 elif r < 0: # LOS pointing away from or missing the triaxial

1224 raise _ValueError(_opposite_ if max(ux, vy, wz) > 0 else _outside_)

1225

1226 d = Fdot(t, ux, vy, wz).fadd_(r).fover(m) # -r for antipode, a2 factored out

1227 if d > 0: # POV inside or LOS outside or missing the triaxial

1228 s = fsumf_(_N_1_0, x2 / a2, y2 / b2, z2 / c2) # like _sideOf

1229 raise _ValueError(_outside_ if s > 0 else _inside_)

1230 elif fsum1f_(x2, y2, z2) < d**2: # d past triaxial's center

1231 raise _ValueError(_too_(_distant_))

1232

1233 v = p3.minus(u3.times(d)) # cartesian type(pov) or Vector3d

1234 h = p3.minus(v).length # distance to pov == -d

1235 return T._order3d(v, reverse=True), h, None

1236

1237

1238 def hartzell4(pov, los=False, tri_biax=_WGS84, **name):

1239 '''Compute the intersection of a tri-/biaxial ellipsoid and a Line-Of-Sight

1240 from a Point-Of-View outside.

1241

1242 @arg pov: Point-Of-View outside the tri-/biaxial (C{Cartesian}, L{Ecef9Tuple}

1243 C{LatLon} or L{Vector3d}).

1244 @kwarg los: Line-Of-Sight, I{direction} to the tri-/biaxial (L{Los}, L{Vector3d}),

1245 C{True} for the I{normal, plumb} onto the surface or C{False} or

1246 C{None} to point to the center of the tri-/biaxial.

1247 @kwarg tri_biax: A triaxial (L{Triaxial}, L{Triaxial_}, L{JacobiConformal} or

1248 L{JacobiConformalSpherical}) or biaxial ellipsoid (L{Datum},

1249 L{Ellipsoid}, L{Ellipsoid2}, L{a_f2Tuple} or C{scalar} radius,

1250 conventionally in C{meter}).

1251 @kwarg name: Optional, overriding C{B{name}="hartzell4"} (C{str}).

1252

1253 @return: L{Vector4Tuple}C{(x, y, z, h)} on the tri-/biaxial's surface, with C{h}

1254 the distance from B{C{pov}} to C{(x, y, z)} I{along the} B{C{los}}, all

1255 in C{meter}, conventionally.

1256

1257 @raise TriaxialError: Invalid B{C{pov}} or B{C{pov}} inside the tri-/biaxial or

1258 invalid B{C{los}} or B{C{los}} points outside or away from

1259 the tri-/biaxial.

1260

1261 @raise TypeError: Invalid B{C{tri_biax}}, C{ellipsoid} or C{datum}.

1262

1263 @see: Class L{pygeodesy3.Los}, functions L{pygeodesy.tyr3d} and L{pygeodesy.hartzell}

1264 and U{lookAtSpheroid<https://PyPI.org/project/pymap3d>} and U{"Satellite

1265 Line-of-Sight Intersection with Earth"<https://StephenHartzell.Medium.com/

1266 satellite-line-of-sight-intersection-with-earth-d786b4a6a9b6>}.

1267 '''

1268 if isinstance(tri_biax, Triaxial_):

1269 T = tri_biax

1270 else:

1271 D = tri_biax if isinstance(tri_biax, Datum) else \

1272 _spherical_datum(tri_biax, name__=hartzell4) # _dunder_nameof

1273 T = D.ellipsoid._triaxial

1274 try:

1275 v, h, i = _hartzell3(pov, los, T)

1276 except Exception as x:

1277 raise TriaxialError(pov=pov, los=los, tri_biax=tri_biax, cause=x)

1278 return Vector4Tuple(v.x, v.y, v.z, h, iteration=i, # _dunder_nameof

1279 name=_name__(name, name__=hartzell4))

1280

1281

1282 def _hypot21(x, y, z=0):

1283 '''(INTERNAL) Compute M{x**2 + y**2 + z**2 - 1} with C{max(fabs(x),

1284 fabs(y), fabs(z))} rarely greater than 1.0.

1285 '''

1286 return fsumf_(_1_0, x**2, y**2, (z**2 if z else _0_0), _N_2_0)

1287

1288

1289 def _normalTo4(x, y, a, b, eps=EPS):

1290 '''(INTERNAL) Nearest point on and distance to a 2-D ellipse, I{unordered}.

1291

1292 @see: Function C{pygeodesy.ellipsoids._normalTo3} and I{Eberly}'s U{Distance

1293 from a Point to ... an Ellipse ...<https://www.GeometricTools.com/

1294 Documentation/DistancePointEllipseEllipsoid.pdf>}.

1295 '''

1296 if b > a:

1297 b, a, d, i = _normalTo4(y, x, b, a, eps=eps)

1298 return a, b, d, i

1299

1300 if not (b > 0 and isfinite(a)):

1301 raise _ValueError(a=a, b=b)

1302

1303 i, _a = None, fabs

1304 if y:

1305 if x:

1306 u = _a(x / a)

1307 v = _a(y / b)

1308 g = _hypot21(u, v)

1309 if _a(g) < EPS02: # on the ellipse

1310 a, b, d = x, y, _0_0

1311 else:

1312 r = (b / a)**2

1313 t, i = _rootXd(_1_0 / r, 0, u, 0, v, g, eps)

1314 a = x / (t * r + _1_0)

1315 b = y / (t + _1_0)

1316 d = hypot(x - a, y - b)

1317 else: # x == 0

1318 if y < 0:

1319 b = -b

1320 a, d = x, _a(y - b)

1321

1322 else: # y == 0

1323 n = a * x

1324 d = (a + b) * (a - b)

1325 if d > _a(n): # PYCHOK no cover

1326 r = n / d

1327 a *= r

1328 r = _1_0 - r**2

1329 if r > EPS02:

1330 b *= sqrt(r)

1331 d = hypot(x - a, b)

1332 else:

1333 b = _0_0

1334 d = _a(x - a)

1335 else:

1336 if x < 0:

1337 a = -a

1338 b, d = y, _a(x - a)

1339 return a, b, d, i

1340

1341

1342 def _normalTo5(x, y, z, Tun, eps=EPS): # MCCABE 19

1343 '''(INTERNAL) Nearest point on and distance to an I{un-/ordered} triaxial.

1344

1345 @see: I{Eberly}'s U{Distance from a Point to ... an Ellipsoid ...<https://

1346 www.GeometricTools.com/Documentation/DistancePointEllipseEllipsoid.pdf>}.

1347 '''

1348 a, b, c, T = Tun._ordered4

1349 if Tun is not T: # T is ordered, Tun isn't

1350 t = T._order3(x, y, z) + (T,)

1351 a, b, c, d, i = _normalTo5(*t, eps=eps)

1352 return T._order3(a, b, c, reverse=True) + (d, i)

1353

1354 if not (c > 0 and isfinite(a)):

1355 raise _ValueError(a=a, b=b, c=c)

1356

1357 if eps > 0:

1358 val = max(eps * 1e8, EPS)

1359 else: # no validation

1360 val, eps = 0, max(EPS0, -eps)

1361

1362 i, _a = None, fabs

1363 if z:

1364 if y:

1365 if x:

1366 u = _a(x / a)

1367 v = _a(y / b)

1368 w = _a(z / c)

1369 g = _hypot21(u, v, w)

1370 if _a(g) < EPS02: # on the ellipsoid

1371 a, b, c, d = x, y, z, _0_0

1372 else:

1373 r = T._1e2ac # (c / a)**2

1374 s = T._1e2bc # (c / b)**2

1375 t, i = _rootXd(_1_0 / r, _1_0 / s, u, v, w, g, eps)

1376 a = x / (t * r + _1_0)

1377 b = y / (t * s + _1_0)

1378 c = z / (t + _1_0)

1379 d = hypot_(x - a, y - b, z - c)

1380 else: # x == 0

1381 a = x # 0

1382 b, c, d, i = _normalTo4(y, z, b, c, eps=eps)

1383 elif x: # y == 0

1384 b = y # 0

1385 a, c, d, i = _normalTo4(x, z, a, c, eps=eps)

1386 else: # x == y == 0

1387 if z < 0:

1388 c = -c

1389 a, b, d = x, y, _a(z - c)

1390

1391 else: # z == 0

1392 t = True

1393 d = T._a2c2 # (a + c) * (a - c)

1394 n = a * x

1395 if d > _a(n):

1396 u = n / d

1397 d = T._b2c2 # (b + c) * (b - c)

1398 n = b * y

1399 if d > _a(n):

1400 v = n / d

1401 n = _hypot21(u, v)

1402 if n < 0:

1403 a *= u

1404 b *= v

1405 c *= sqrt(-n)

1406 d = hypot_(x - a, y - b, c)

1407 t = False

1408 if t:

1409 c = z # signed-0

1410 a, b, d, i = _normalTo4(x, y, a, b, eps=eps)

1411

1412 if val > 0: # validate

1413 e = T.sideOf(a, b, c, eps=val)

1414 if e: # not near the ellipsoid's surface

1415 raise _ValueError(a=a, b=b, c=c, d=d,

1416 sideOf=e, eps=val)

1417 if d: # angle of delta and normal vector

1418 m = Vector3d(x, y, z).minus_(a, b, c)

1419 if m.euclid > val:

1420 m = m.unit()

1421 n = T.normal3d(a, b, c)

1422 e = n.dot(m) # n.negate().dot(m)

1423 if not isnear1(_a(e), eps1=val):

1424 raise _ValueError(n=n, m=m,

1425 dot=e, eps=val)

1426 return a, b, c, d, i

1427

1428

1429 def _otherV3d_(x_xyz, y, z, **name):

1430 '''(INTERNAL) Get a Vector3d from C{x_xyz}, C{y} and C{z}.

1431 '''

1432 return Vector3d(x_xyz, y, z, **name) if isscalar(x_xyz) else \

1433 _otherV3d(x_xyz=x_xyz)

1434

1435

1436 def _rootXd(r, s, u, v, w, g, eps):

1437 '''(INTERNAL) Robust 2d- or 3d-root finder: 2d- if C{s == v == 0} else 3d-root.

1438

1439 @see: I{Eberly}'s U{Robust Root Finders ...<https://www.GeometricTools.com/

1440 Documentation/DistancePointEllipseEllipsoid.pdf>}.

1441 '''

1442 _1, __2 = _1_0, _0_5

1443 _a, _h21 = fabs, _hypot21

1444

1445 u *= r

1446 v *= s # 0 for 2d-root

1447 t0 = w - _1

1448 t1 = _0_0 if g < 0 else (hypot_(u, w, v) - _1)

1449 # assert t0 <= t1

1450 for i in range(1, _TRIPS): # 48-55

1451 e = _a(t0 - t1)

1452 if e < eps:

1453 break

1454 t = (t0 + t1) * __2

1455 if t in (t0, t1):

1456 break

1457 g = _h21(u / (t + r), w / (t + _1),

1458 (v / (t + s)) if v else 0)

1459 if g > 0:

1460 t0 = t

1461 elif g < 0:

1462 t1 = t

1463 else:

1464 break

1465 else: # PYCHOK no cover

1466 t = Fmt.no_convergence(e, eps)

1467 raise _ValueError(t, txt__=_rootXd)

1468 return t, i

1469

1470

1471 def _sideOf(xyz, abc, eps=EPS):

1472 '''(INTERNAL) Helper for C{_hartzell3}, M{.sideOf} and M{.reverseCartesian}.

1473

1474 @return: M{sum((x / a)**2 for x, a in zip(xyz, abc)) - 1} or C{INT0}.

1475 '''

1476 s = fsumf_(_N_1_0, *((x / a)**2 for x, a in _zip(xyz, abc) if a)) # strict=True

1477 return INT0 if fabs(s) < eps else s

1478

1479

1480 if __name__ == '__main__':

1481

1482 from pygeodesy import printf

1483 from pygeodesy.interns import _COMMA_, _NL_, _NLATvar_

1484

1485 # __doc__ of this file, force all into registery

1486 t = [NN] + Triaxials.toRepr(all=True, asorted=True).split(_NL_)

1487 printf(_NLATvar_.join(i.strip(_COMMA_) for i in t))

1488

1489# **) MIT License

1490#

1491# Copyright (C) 2022-2024 -- mrJean1 at Gmail -- All Rights Reserved.

1492#

1493# Permission is hereby granted, free of charge, to any person obtaining a

1494# copy of this software and associated documentation files (the "Software"),

1495# to deal in the Software without restriction, including without limitation

1496# the rights to use, copy, modify, merge, publish, distribute, sublicense,

1497# and/or sell copies of the Software, and to permit persons to whom the

1498# Software is furnished to do so, subject to the following conditions:

1499#

1500# The above copyright notice and this permission notice shall be included

1501# in all copies or substantial portions of the Software.

1502#

1503# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

1504# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

1505# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

1506# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR

1507# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,

1508# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR

1509# OTHER DEALINGS IN THE SOFTWARE.