482 lines
17 KiB
Python
482 lines
17 KiB
Python
import numpy as np
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from ellipsoide import EllipsoidTriaxial
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from runge_kutta import rk4, rk4_step, rk4_end, rk4_integral
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import GHA_triaxial.numeric_examples_karney as ne_karney
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import GHA_triaxial.numeric_examples_panou as ne_panou
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import winkelumrechnungen as wu
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from typing import Tuple
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from numpy.typing import NDArray
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import ausgaben as aus
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from utils_angle import cot, arccot, wrap_to_pi
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def norm_a(a: float) -> float:
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a = float(a) % (2 * np.pi)
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return a
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def azimut(E: float, G: float, dbeta_du: float, dlamb_du: float) -> float:
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north = np.sqrt(E) * dbeta_du
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east = np.sqrt(G) * dlamb_du
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return norm_a(np.arctan2(east, north))
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def sph_azimuth(beta1, lam1, beta2, lam2):
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dlam = wrap_to_pi(lam2 - lam1)
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y = np.sin(dlam) * np.cos(beta2)
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x = np.cos(beta1) * np.sin(beta2) - np.sin(beta1) * np.cos(beta2) * np.cos(dlam)
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a = np.arctan2(y, x)
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if a < 0:
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a += 2 * np.pi
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return a
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# Panou 2013
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def gha2_num(
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ell: EllipsoidTriaxial,
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beta_0: float,
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lamb_0: float,
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beta_1: float,
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lamb_1: float,
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n: int = 16000,
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epsilon: float = 10**-12,
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iter_max: int = 30,
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all_points: bool = False,
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) -> Tuple[float, float, float] | Tuple[float, float, float, NDArray, NDArray]:
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"""
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:param ell: Ellipsoid
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:param beta_0: Beta Punkt 0
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:param lamb_0: Lambda Punkt 0
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:param beta_1: Beta Punkt 1
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:param lamb_1: Lambda Punkt 1
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:param n: Anzahl Schritte
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:param epsilon: Genauigkeit
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:param iter_max: Maximale Iterationen
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:param all_points: Ausgabe aller Punkte
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:return: Azimut Startpunkt, Azumit Zielpunkt, Strecke
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"""
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# Berechnung Koeffizienten, Gaußschen Fundamentalgrößen 1. Ordnung sowie deren Ableitungen
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def BETA_LAMBDA(beta, lamb):
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BETA = (ell.ay**2 * np.sin(beta) ** 2 + ell.b**2 * np.cos(beta) ** 2) / (
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ell.Ex**2 - ell.Ey**2 * np.sin(beta) ** 2
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)
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LAMBDA = (ell.ax**2 * np.sin(lamb) ** 2 + ell.ay**2 * np.cos(lamb) ** 2) / (
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ell.Ex**2 - ell.Ee**2 * np.cos(lamb) ** 2
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)
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BETA_ = (ell.ax**2 * ell.Ey**2 * np.sin(2 * beta)) / (
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ell.Ex**2 - ell.Ey**2 * np.sin(beta) ** 2
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) ** 2
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LAMBDA_ = -(ell.b**2 * ell.Ee**2 * np.sin(2 * lamb)) / (
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ell.Ex**2 - ell.Ee**2 * np.cos(lamb) ** 2
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) ** 2
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BETA__ = (
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(2 * ell.ax**2 * ell.Ey**4 * np.sin(2 * beta) ** 2)
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/ (ell.Ex**2 - ell.Ey**2 * np.sin(beta) ** 2) ** 3
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+ (2 * ell.ax**2 * ell.Ey**2 * np.cos(2 * beta))
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/ (ell.Ex**2 - ell.Ey**2 * np.sin(beta) ** 2) ** 2
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)
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LAMBDA__ = (
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(2 * ell.b**2 * ell.Ee**4 * np.sin(2 * lamb) ** 2)
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/ (ell.Ex**2 - ell.Ee**2 * np.cos(lamb) ** 2) ** 3
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- (2 * ell.b**2 * ell.Ee**2 * np.sin(2 * lamb))
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/ (ell.Ex**2 - ell.Ee**2 * np.cos(lamb) ** 2) ** 2
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)
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E = BETA * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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G = LAMBDA * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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E_beta = (
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BETA_ * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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- BETA * ell.Ey**2 * np.sin(2 * beta)
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)
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E_lamb = BETA * ell.Ee**2 * np.sin(2 * lamb)
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G_beta = -LAMBDA * ell.Ey**2 * np.sin(2 * beta)
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G_lamb = (
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LAMBDA_ * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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+ LAMBDA * ell.Ee**2 * np.sin(2 * lamb)
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)
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E_beta_beta = (
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BETA__ * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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- 2 * BETA_ * ell.Ey**2 * np.sin(2 * beta)
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- 2 * BETA * ell.Ey**2 * np.cos(2 * beta)
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)
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E_beta_lamb = BETA_ * ell.Ee**2 * np.sin(2 * lamb)
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E_lamb_lamb = 2 * BETA * ell.Ee**2 * np.cos(2 * lamb)
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G_beta_beta = -2 * LAMBDA * ell.Ey**2 * np.cos(2 * beta)
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G_beta_lamb = -LAMBDA_ * ell.Ey**2 * np.sin(2 * beta)
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G_lamb_lamb = (
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LAMBDA__ * (ell.Ey**2 * np.cos(beta) ** 2 + ell.Ee**2 * np.sin(lamb) ** 2)
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+ 2 * LAMBDA_ * ell.Ee**2 * np.sin(2 * lamb)
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+ 2 * LAMBDA * ell.Ee**2 * np.cos(2 * lamb)
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)
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return (
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BETA,
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LAMBDA,
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E,
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G,
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BETA_,
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LAMBDA_,
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BETA__,
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LAMBDA__,
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E_beta,
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E_lamb,
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G_beta,
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G_lamb,
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E_beta_beta,
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E_beta_lamb,
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E_lamb_lamb,
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G_beta_beta,
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G_beta_lamb,
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G_lamb_lamb,
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)
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# Berechnung der ODE Koeffizienten für Fall 1 (lambda_0 != lambda_1)
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def p_coef(beta, lamb):
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(
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BETA,
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LAMBDA,
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E,
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G,
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BETA_,
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LAMBDA_,
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BETA__,
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LAMBDA__,
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E_beta,
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E_lamb,
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G_beta,
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G_lamb,
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E_beta_beta,
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E_beta_lamb,
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E_lamb_lamb,
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G_beta_beta,
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G_beta_lamb,
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G_lamb_lamb,
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) = BETA_LAMBDA(beta, lamb)
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p_3 = -0.5 * (E_lamb / G)
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p_2 = (G_beta / G) - 0.5 * (E_beta / E)
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p_1 = 0.5 * (G_lamb / G) - (E_lamb / E)
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p_0 = 0.5 * (G_beta / E)
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p_33 = -0.5 * ((E_beta_lamb * G - E_lamb * G_beta) / (G**2))
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p_22 = ((G * G_beta_beta - G_beta * G_beta) / (G**2)) - 0.5 * (
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(E * E_beta_beta - E_beta * E_beta) / (E**2)
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)
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p_11 = 0.5 * ((G * G_beta_lamb - G_beta * G_lamb) / (G**2)) - (
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(E * E_beta_lamb - E_beta * E_lamb) / (E**2)
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)
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p_00 = 0.5 * ((E * G_beta_beta - E_beta * G_beta) / (E**2))
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return (BETA, LAMBDA, E, G, p_3, p_2, p_1, p_0, p_33, p_22, p_11, p_00)
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# Berechnung der ODE Koeffizienten für Fall 2 (lambda_0 == lambda_1)
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def q_coef(beta, lamb):
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(
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BETA,
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LAMBDA,
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E,
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G,
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BETA_,
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LAMBDA_,
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BETA__,
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LAMBDA__,
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E_beta,
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E_lamb,
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G_beta,
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G_lamb,
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E_beta_beta,
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E_beta_lamb,
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E_lamb_lamb,
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G_beta_beta,
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G_beta_lamb,
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G_lamb_lamb,
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) = BETA_LAMBDA(beta, lamb)
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q_3 = -0.5 * (G_beta / E)
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q_2 = (E_lamb / E) - 0.5 * (G_lamb / G)
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q_1 = 0.5 * (E_beta / E) - (G_beta / G)
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q_0 = 0.5 * (E_lamb / G)
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q_33 = -0.5 * ((E * G_beta_lamb - E_lamb * G_lamb) / (E**2))
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q_22 = ((E * E_lamb_lamb - E_lamb * E_lamb) / (E**2)) - 0.5 * (
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(G * G_lamb_lamb - G_lamb * G_lamb) / (G**2)
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)
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q_11 = 0.5 * ((E * E_beta_lamb - E_beta * E_lamb) / (E**2)) - (
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(G * G_beta_lamb - G_beta * G_lamb) / (G**2)
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)
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q_00 = 0.5 * ((E_lamb_lamb * G - E_lamb * G_lamb) / (G**2))
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return BETA, LAMBDA, E, G, q_3, q_2, q_1, q_0, q_33, q_22, q_11, q_00
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def integrand_lambda(lamb, y):
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beta = y[0]
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beta_p = y[1]
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(_, _, E, G, *_) = BETA_LAMBDA(beta, lamb)
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return np.sqrt(E * beta_p**2 + G)
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def integrand_beta(beta, y):
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lamb = y[0]
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lamb_p = y[1]
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(_, _, E, G, *_) = BETA_LAMBDA(beta, lamb)
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return np.sqrt(E + G * lamb_p**2)
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lamb_0 = wrap_to_pi(lamb_0)
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lamb_1 = wrap_to_pi(lamb_1)
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# Fall 1 (lambda_0 != lambda_1)
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if abs(lamb_1 - lamb_0) >= 1e-15:
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N = int(n)
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dlamb = wrap_to_pi(lamb_1 - lamb_0)
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sgn = 1.0 if dlamb >= 0.0 else -1.0
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beta0 = float(beta_0)
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lamb0 = float(lamb_0)
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beta1 = float(beta_1)
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lamb1 = float(lamb_1)
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def ode_lamb(lamb, v):
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beta, beta_p, X3, X4 = v
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(_, _, _, _, p_3, p_2, p_1, p_0, p_33, p_22, p_11, p_00) = p_coef(beta, lamb)
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dbeta = beta_p
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dbeta_p = p_3 * beta_p**3 + p_2 * beta_p**2 + p_1 * beta_p + p_0
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dX3 = X4
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dX4 = (p_33 * beta_p**3 + p_22 * beta_p**2 + p_11 * beta_p + p_00) * X3 + (
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3 * p_3 * beta_p**2 + 2 * p_2 * beta_p + p_1
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) * X4
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return np.array([dbeta, dbeta_p, dX3, dX4], dtype=float)
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alpha0_sph = sph_azimuth(beta0, lamb0, beta1, lamb1)
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(_, _, E0, G0, *_) = BETA_LAMBDA(beta0, lamb0)
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beta_p0_sph = np.sqrt(G0 / E0) * cot(alpha0_sph)
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N_newton = min(N, 4000)
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def solve_newton(beta_p0_init: float):
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beta_p0 = float(beta_p0_init)
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for _ in range(iter_max):
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v0 = np.array([beta0, beta_p0, 0.0, 1.0], dtype=float)
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_, y_end = rk4_end(ode_lamb, lamb0, v0, dlamb, N_newton)
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beta_end, _, X3_end, _ = y_end
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delta = beta_end - beta1
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if abs(delta) < epsilon:
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return True, beta_p0
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if abs(X3_end) < 1e-20:
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return False, None
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step = delta / X3_end
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step = np.clip(step, -0.5, 0.5)
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beta_p0 -= step
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return False, None
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ok, beta_p0_sol = solve_newton(beta_p0_sph)
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if not ok:
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candidates = [-beta_p0_sph, 0.5 * beta_p0_sph, 2.0 * beta_p0_sph]
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N_quick = min(N, 2000)
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best = None
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for g in candidates:
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ok_g, sol = solve_newton(g)
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if not ok_g:
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continue
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v0_g = np.array([beta0, sol, 0.0, 1.0], dtype=float)
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_, _, s_quick = rk4_integral(ode_lamb, lamb0, v0_g, dlamb, N_quick, integrand_lambda)
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if (best is None) or (s_quick < best[0]):
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best = (s_quick, sol)
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if best is None:
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raise RuntimeError("GHA2_num: Keine Startwert-Variante konvergiert (lambda-Fall)")
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beta_p0_sol = best[1]
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beta_p0 = float(beta_p0_sol)
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v0_final = np.array([beta0, beta_p0, 0.0, 1.0], dtype=float)
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if all_points:
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lamb_list, states = rk4(ode_lamb, lamb0, v0_final, dlamb, N, False)
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lamb_arr = np.array(lamb_list, dtype=float)
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beta_arr = np.array([st[0] for st in states], dtype=float)
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beta_p_arr = np.array([st[1] for st in states], dtype=float)
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(_, _, E_start, G_start, *_) = BETA_LAMBDA(beta_arr[0], lamb_arr[0])
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(_, _, E_end, G_end, *_) = BETA_LAMBDA(beta_arr[-1], lamb_arr[-1])
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alpha_0 = azimut(E_start, G_start, dbeta_du=beta_p_arr[0] * sgn, dlamb_du=1.0 * sgn)
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alpha_1 = azimut(E_end, G_end, dbeta_du=beta_p_arr[-1] * sgn, dlamb_du=1.0 * sgn)
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# Distanz aus Arrays
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integrand = np.zeros(N + 1, dtype=float)
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for i in range(N + 1):
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(_, _, Ei, Gi, *_) = BETA_LAMBDA(beta_arr[i], lamb_arr[i])
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integrand[i] = np.sqrt(Ei * beta_p_arr[i] ** 2 + Gi)
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h = abs(dlamb) / N
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if N % 2 == 0:
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S = integrand[0] + integrand[-1] + 4.0 * np.sum(integrand[1:-1:2]) + 2.0 * np.sum(
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integrand[2:-1:2]
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)
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s = h / 3.0 * S
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else:
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s = np.trapz(integrand, dx=h)
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return float(alpha_0), float(alpha_1), float(s), beta_arr, lamb_arr
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_, y_end, s = rk4_integral(ode_lamb, lamb0, v0_final, dlamb, N, integrand_lambda)
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beta_end, beta_p_end, _, _ = y_end
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(_, _, E_start, G_start, *_) = BETA_LAMBDA(beta0, lamb0)
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alpha_0 = azimut(E_start, G_start, dbeta_du=beta_p0 * sgn, dlamb_du=1.0 * sgn)
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(_, _, E_end, G_end, *_) = BETA_LAMBDA(float(beta_end), lamb1)
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alpha_1 = azimut(E_end, G_end, dbeta_du=float(beta_p_end) * sgn, dlamb_du=1.0 * sgn)
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return float(alpha_0), float(alpha_1), float(s)
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# Fall 2 (lambda_0 == lambda_1)
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N = int(n)
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dbeta = float(beta_1 - beta_0)
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if abs(dbeta) < 1e-15:
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if all_points:
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return 0.0, 0.0, 0.0, np.array([]), np.array([])
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return 0.0, 0.0, 0.0
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beta0 = float(beta_0)
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lamb0 = float(lamb_0)
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beta1 = float(beta_1)
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lamb1 = float(lamb_1)
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sgn = 1.0 if dbeta >= 0.0 else -1.0
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def ode_beta(beta, v):
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lamb, lamb_p, Y3, Y4 = v
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(_, _, _, _, q_3, q_2, q_1, q_0, q_33, q_22, q_11, q_00) = q_coef(beta, lamb)
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dlamb = lamb_p
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dlamb_p = q_3 * lamb_p**3 + q_2 * lamb_p**2 + q_1 * lamb_p + q_0
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dY3 = Y4
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dY4 = (q_33 * lamb_p**3 + q_22 * lamb_p**2 + q_11 * lamb_p + q_00) * Y3 + (
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3 * q_3 * lamb_p**2 + 2 * q_2 * lamb_p + q_1
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) * Y4
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return np.array([dlamb, dlamb_p, dY3, dY4], dtype=float)
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lamb_p0 = 0.0
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for _ in range(iter_max):
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v0 = np.array([lamb0, lamb_p0, 0.0, 1.0], dtype=float)
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_, y_end = rk4_end(ode_beta, beta0, v0, dbeta, N)
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lamb_end, _, Y3_end, _ = y_end
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delta = lamb_end - lamb1
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if abs(delta) < epsilon:
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break
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if abs(Y3_end) < 1e-20:
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raise RuntimeError("GHA2_num: Ableitung ~ 0 im beta-Fall")
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step = delta / Y3_end
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step = np.clip(step, -1.0, 1.0)
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lamb_p0 -= step
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v0_final = np.array([lamb0, lamb_p0, 0.0, 1.0], dtype=float)
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if all_points:
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beta_list, states = rk4(ode_beta, beta0, v0_final, dbeta, N, False)
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beta_arr = np.array(beta_list, dtype=float)
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lamb_arr = np.array([st[0] for st in states], dtype=float)
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lamb_p_arr = np.array([st[1] for st in states], dtype=float)
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(_, _, E_start, G_start, *_) = BETA_LAMBDA(beta_arr[0], lamb_arr[0])
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(_, _, E_end, G_end, *_) = BETA_LAMBDA(beta_arr[-1], lamb_arr[-1])
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alpha_0 = azimut(E_start, G_start, dbeta_du=1.0 * sgn, dlamb_du=lamb_p_arr[0] * sgn)
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alpha_1 = azimut(E_end, G_end, dbeta_du=1.0 * sgn, dlamb_du=lamb_p_arr[-1] * sgn)
|
|
|
|
integrand = np.zeros(N + 1, dtype=float)
|
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for i in range(N + 1):
|
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(_, _, Ei, Gi, *_) = BETA_LAMBDA(beta_arr[i], lamb_arr[i])
|
|
integrand[i] = np.sqrt(Ei + Gi * lamb_p_arr[i] ** 2)
|
|
|
|
h = abs(dbeta) / N
|
|
if N % 2 == 0:
|
|
S = integrand[0] + integrand[-1] + 4.0 * np.sum(integrand[1:-1:2]) + 2.0 * np.sum(
|
|
integrand[2:-1:2]
|
|
)
|
|
s = h / 3.0 * S
|
|
else:
|
|
s = np.trapz(integrand, dx=h)
|
|
|
|
return float(alpha_0), float(alpha_1), float(s), beta_arr, lamb_arr
|
|
|
|
_, y_end, s = rk4_integral(ode_beta, beta0, v0_final, dbeta, N, integrand_beta)
|
|
lamb_end, lamb_p_end, _, _ = y_end
|
|
|
|
(_, _, E_start, G_start, *_) = BETA_LAMBDA(beta0, lamb0)
|
|
alpha_0 = azimut(E_start, G_start, dbeta_du=1.0 * sgn, dlamb_du=lamb_p0 * sgn)
|
|
|
|
(_, _, E_end, G_end, *_) = BETA_LAMBDA(beta1, float(lamb_end))
|
|
alpha_1 = azimut(E_end, G_end, dbeta_du=1.0 * sgn, dlamb_du=float(lamb_p_end) * sgn)
|
|
|
|
return float(alpha_0), float(alpha_1), float(s)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
# ell = EllipsoidTriaxial.init_name("BursaSima1980round")
|
|
# beta1 = np.deg2rad(75)
|
|
# lamb1 = np.deg2rad(-90)
|
|
# beta2 = np.deg2rad(75)
|
|
# lamb2 = np.deg2rad(66)
|
|
# a0, a1, s = gha2_num(ell, beta1, lamb1, beta2, lamb2, n=5000)
|
|
# print(aus.gms("a0", a0, 4))
|
|
# print(aus.gms("a1", a1, 4))
|
|
# print("s: ", s)
|
|
# # print(aus.gms("a2", a2, 4))
|
|
# # print(s)
|
|
# cart1 = ell.para2cart(0, 0)
|
|
# cart2 = ell.para2cart(0.4, 1.4)
|
|
# beta1, lamb1 = ell.cart2ell(cart1)
|
|
# beta2, lamb2 = ell.cart2ell(cart2)
|
|
#
|
|
# a1, a2, s = gha2_num(ell, beta1, lamb1, beta2, lamb2, n=5000)
|
|
# print(s)
|
|
|
|
# ell = EllipsoidTriaxial.init_name("BursaSima1980round")
|
|
# diffs_panou = []
|
|
# examples_panou = ne_panou.get_random_examples(4)
|
|
# for example in examples_panou:
|
|
# beta0, lamb0, beta1, lamb1, _, alpha0, alpha1, s = example
|
|
# P0 = ell.ell2cart(beta0, lamb0)
|
|
# try:
|
|
# alpha0_num, alpha1_num, s_num = gha2_num(ell, beta0, lamb0, beta1, lamb1, n=4000, iter_max=10)
|
|
# diffs_panou.append(
|
|
# (wu.rad2deg(abs(alpha0 - alpha0_num)), wu.rad2deg(abs(alpha1 - alpha1_num)), abs(s - s_num)))
|
|
# except:
|
|
# print(f"Fehler für {beta0}, {lamb0}, {beta1}, {lamb1}")
|
|
# diffs_panou = np.array(diffs_panou)
|
|
# print(diffs_panou)
|
|
#
|
|
# ell = EllipsoidTriaxial.init_name("KarneyTest2024")
|
|
# diffs_karney = []
|
|
# # examples_karney = ne_karney.get_examples((30500, 40500))
|
|
# examples_karney = ne_karney.get_random_examples(2)
|
|
# for example in examples_karney:
|
|
# beta0, lamb0, alpha0, beta1, lamb1, alpha1, s = example
|
|
#
|
|
# try:
|
|
# alpha0_num, alpha1_num, s_num = gha2_num(ell, beta0, lamb0, beta1, lamb1, n=4000, iter_max=10)
|
|
# diffs_karney.append((wu.rad2deg(abs(alpha0-alpha0_num)), wu.rad2deg(abs(alpha1-alpha1_num)), abs(s-s_num)))
|
|
# except:
|
|
# print(f"Fehler für {beta0}, {lamb0}, {beta1}, {lamb1}")
|
|
# diffs_karney = np.array(diffs_karney)
|
|
# print(diffs_karney)
|
|
|
|
pass
|