Cannot sample enough valid points. (more)

\[\tan^{-1}_* \frac{\sin \left(\lambda_1 - \lambda_2\right) \cdot \cos \phi_2}{\cos \phi_1 \cdot \sin \phi_2 - \left(\sin \phi_1 \cdot \cos \phi_2\right) \cdot \cos \left(\lambda_1 - \lambda_2\right)}\]
\tan^{-1}_* \frac{\sin \left(\lambda_1 - \lambda_2\right) \cdot \cos \phi_2}{\cos \phi_1 \cdot \sin \phi_2 - \left(\sin \phi_1 \cdot \cos \phi_2\right) \cdot \cos \left(\lambda_1 - \lambda_2\right)}
double f(double lambda1, double lambda2, double phi1, double phi2) {
        double r1214458 = lambda1;
        double r1214459 = lambda2;
        double r1214460 = r1214458 - r1214459;
        double r1214461 = sin(r1214460);
        double r1214462 = phi2;
        double r1214463 = cos(r1214462);
        double r1214464 = r1214461 * r1214463;
        double r1214465 = phi1;
        double r1214466 = cos(r1214465);
        double r1214467 = sin(r1214462);
        double r1214468 = r1214466 * r1214467;
        double r1214469 = sin(r1214465);
        double r1214470 = r1214469 * r1214463;
        double r1214471 = cos(r1214460);
        double r1214472 = r1214470 * r1214471;
        double r1214473 = r1214468 - r1214472;
        double r1214474 = atan2(r1214464, r1214473);
        return r1214474;
}