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//
// GENERATED FILE
//
use super::*;
use crate::SpiceContext;
use f2rust_std::*;
/// Cylindrical to latitudinal
///
/// Convert from cylindrical to latitudinal coordinates.
///
/// # Brief I/O
///
/// ```text
/// VARIABLE I/O DESCRIPTION
/// -------- --- --------------------------------------------------
/// R I Distance of point from Z axis.
/// CLON I Cylindrical angle of point from XZ plane(radians).
/// Z I Height of point above XY plane.
/// RADIUS O Distance of point from origin.
/// LON O Longitude of point (radians).
/// LAT O Latitude of point (radians).
/// ```
///
/// # Detailed Input
///
/// ```text
/// R is the distance of the input point from Z axis.
///
/// CLON is the cylindrical angle of the point from XZ plane
/// (radians).
///
/// Z is the height of the point above XY plane.
/// ```
///
/// # Detailed Output
///
/// ```text
/// RADIUS is the distance of the input point from origin.
///
/// LON is the longitude (i.e. angle from the XZ plane) of
/// the input point (radians). LON is set equal to CLON.
///
/// LAT is the latitude (i.e. angle above the XY plane) of the
/// input point (radians). The range of LAT is [-pi, pi].
/// ```
///
/// # Exceptions
///
/// ```text
/// Error free.
/// ```
///
/// # Particulars
///
/// ```text
/// This routine converts coordinates given in cylindrical
/// coordinates to coordinates in latitudinal coordinates.
///
/// Latitudinal coordinates are defined by a distance from a central
/// reference point, an angle from a reference meridian, and an angle
/// above the equator of a sphere centered at the central reference
/// point.
/// ```
///
/// # Examples
///
/// ```text
/// The numerical results shown for these examples may differ across
/// platforms. The results depend on the SPICE kernels used as
/// input, the compiler and supporting libraries, and the machine
/// specific arithmetic implementation.
///
/// 1) Compute the cylindrical coordinates of the position of the
/// Moon as seen from the Earth, and convert them to latitudinal
/// and rectangular coordinates.
///
/// Use the meta-kernel shown below to load the required SPICE
/// kernels.
///
///
/// KPL/MK
///
/// File name: cyllat_ex1.tm
///
/// This meta-kernel is intended to support operation of SPICE
/// example programs. The kernels shown here should not be
/// assumed to contain adequate or correct versions of data
/// required by SPICE-based user applications.
///
/// In order for an application to use this meta-kernel, the
/// kernels referenced here must be present in the user's
/// current working directory.
///
/// The names and contents of the kernels referenced
/// by this meta-kernel are as follows:
///
/// File name Contents
/// --------- --------
/// de421.bsp Planetary ephemeris
/// naif0012.tls Leapseconds
///
///
/// \begindata
///
/// KERNELS_TO_LOAD = ( 'de421.bsp',
/// 'naif0012.tls' )
///
/// \begintext
///
/// End of meta-kernel
///
///
/// Example code begins here.
///
///
/// PROGRAM CYLLAT_EX1
/// IMPLICIT NONE
///
/// C
/// C SPICELIB functions
/// C
/// DOUBLE PRECISION DPR
///
/// C
/// C Local parameters
/// C
/// CHARACTER*(*) FMT1
/// PARAMETER ( FMT1 = '(A,F20.8)' )
///
/// C
/// C Local variables
/// C
/// DOUBLE PRECISION CLON
/// DOUBLE PRECISION ET
/// DOUBLE PRECISION LAT
/// DOUBLE PRECISION LON
/// DOUBLE PRECISION LT
/// DOUBLE PRECISION POS ( 3 )
/// DOUBLE PRECISION RADIUS
/// DOUBLE PRECISION RECTAN ( 3 )
/// DOUBLE PRECISION R
/// DOUBLE PRECISION Z
///
/// C
/// C Load SPK and LSK kernels, use a meta kernel for
/// C convenience.
/// C
/// CALL FURNSH ( 'cyllat_ex1.tm' )
///
/// C
/// C Look up the geometric state of the Moon as seen from
/// C the Earth at 2017 Mar 20, relative to the J2000
/// C reference frame.
/// C
/// CALL STR2ET ( '2017 Mar 20', ET )
///
/// CALL SPKPOS ( 'Moon', ET, 'J2000', 'NONE',
/// . 'Earth', POS, LT )
///
/// C
/// C Convert the position vector POS to cylindrical
/// C coordinates.
/// C
/// CALL RECCYL ( POS, R, CLON, Z )
///
/// C
/// C Convert the cylindrical coordinates to latitudinal.
/// C
/// CALL CYLLAT ( R, CLON, Z, RADIUS, LON, LAT )
///
/// C
/// C Convert the latitudinal coordinates to rectangular.
/// C
/// CALL LATREC ( RADIUS, LON, LAT, RECTAN )
///
///
/// WRITE(*,*) ' '
/// WRITE(*,*) 'Original rectangular coordinates:'
/// WRITE(*,*) ' '
/// WRITE(*,FMT1) ' X (km): ', POS(1)
/// WRITE(*,FMT1) ' Y (km): ', POS(2)
/// WRITE(*,FMT1) ' Z (km): ', POS(3)
/// WRITE(*,*) ' '
/// WRITE(*,*) 'Cylindrical coordinates:'
/// WRITE(*,*) ' '
/// WRITE(*,FMT1) ' Radius (km): ', R
/// WRITE(*,FMT1) ' Longitude (deg): ', CLON*DPR()
/// WRITE(*,FMT1) ' Z (km): ', Z
/// WRITE(*,*) ' '
/// WRITE(*,*) 'Latitudinal coordinates:'
/// WRITE(*,*) ' '
/// WRITE(*,FMT1) ' Radius (km): ', RADIUS
/// WRITE(*,FMT1) ' Longitude (deg): ', LON*DPR()
/// WRITE(*,FMT1) ' Latitude (deg): ', LAT*DPR()
/// WRITE(*,*) ' '
/// WRITE(*,*) 'Rectangular coordinates from LATREC:'
/// WRITE(*,*) ' '
/// WRITE(*,FMT1) ' X (km): ', RECTAN(1)
/// WRITE(*,FMT1) ' Y (km): ', RECTAN(2)
/// WRITE(*,FMT1) ' Z (km): ', RECTAN(3)
/// WRITE(*,*) ' '
///
/// END
///
///
/// When this program was executed on a Mac/Intel/gfortran/64-bit
/// platform, the output was:
///
///
/// Original rectangular coordinates:
///
/// X (km): -55658.44323296
/// Y (km): -379226.32931475
/// Z (km): -126505.93063865
///
/// Cylindrical coordinates:
///
/// Radius (km): 383289.01777726
/// Longitude (deg): 261.65040211
/// Z (km): -126505.93063865
///
/// Latitudinal coordinates:
///
/// Radius (km): 403626.33912495
/// Longitude (deg): 261.65040211
/// Latitude (deg): -18.26566077
///
/// Rectangular coordinates from LATREC:
///
/// X (km): -55658.44323296
/// Y (km): -379226.32931475
/// Z (km): -126505.93063865
///
///
/// 2) Create a table showing a variety of cylindrical coordinates
/// and the corresponding latitudinal coordinates.
///
/// Corresponding latitudinal and cylindrical coordinates are
/// listed to three decimal places. All input and output angles
/// are in degrees.
///
///
/// Example code begins here.
///
///
/// PROGRAM CYLLAT_EX2
/// IMPLICIT NONE
///
/// C
/// C SPICELIB functions
/// C
/// DOUBLE PRECISION DPR
/// DOUBLE PRECISION RPD
///
/// C
/// C Local parameters.
/// C
/// INTEGER NREC
/// PARAMETER ( NREC = 11 )
///
/// C
/// C Local variables.
/// C
/// DOUBLE PRECISION CLON ( NREC )
/// DOUBLE PRECISION LAT
/// DOUBLE PRECISION LON
/// DOUBLE PRECISION R ( NREC )
/// DOUBLE PRECISION RADIUS
/// DOUBLE PRECISION RCLON
/// DOUBLE PRECISION Z ( NREC )
///
/// INTEGER I
///
/// C
/// C Define the input cylindrical coordinates. Angles
/// C in degrees.
/// C
///
/// DATA R / 0.D0, 1.D0, 1.D0,
/// . 0.D0, 1.D0, 1.D0,
/// . 0.D0, 1.D0, 1.D0,
/// . 0.D0, 0.D0 /
///
/// DATA CLON / 0.D0, 0.D0, 90.D0,
/// . 0.D0, 180.D0, -90.D0,
/// . 0.D0, 45.D0, 180.D0,
/// . 180.D0, 33.D0 /
///
/// DATA Z / 0.D0, 0.D0, 0.D0,
/// . 1.D0, 1.D0, 0.D0,
/// . -1.D0, 0.D0, -1.D0,
/// . 1.D0, 0.D0 /
///
/// C
/// C Print the banner.
/// C
/// WRITE(*,*) ' R CLON Z '
/// . // ' RADIUS LON LAT '
/// WRITE(*,*) ' ------- ------- ------- '
/// . // ' ------- ------- ------- '
///
/// C
/// C Do the conversion. Output angles in degrees.
/// C
/// DO I = 1, NREC
///
/// RCLON = CLON(I) * RPD()
///
/// CALL CYLLAT( R(I), RCLON, Z(I), RADIUS, LON, LAT )
///
/// WRITE (*,'(6F9.3)') R(I), CLON(I), Z(I),
/// . RADIUS, LON * DPR(), LAT * DPR()
///
/// END DO
///
/// END
///
///
/// When this program was executed on a Mac/Intel/gfortran/64-bit
/// platform, the output was:
///
///
/// R CLON Z RADIUS LON LAT
/// ------- ------- ------- ------- ------- -------
/// 0.000 0.000 0.000 0.000 0.000 0.000
/// 1.000 0.000 0.000 1.000 0.000 0.000
/// 1.000 90.000 0.000 1.000 90.000 0.000
/// 0.000 0.000 1.000 1.000 0.000 90.000
/// 1.000 180.000 1.000 1.414 180.000 45.000
/// 1.000 -90.000 0.000 1.000 -90.000 0.000
/// 0.000 0.000 -1.000 1.000 0.000 -90.000
/// 1.000 45.000 0.000 1.000 45.000 0.000
/// 1.000 180.000 -1.000 1.414 180.000 -45.000
/// 0.000 180.000 1.000 1.000 180.000 90.000
/// 0.000 33.000 0.000 0.000 33.000 0.000
/// ```
///
/// # Author and Institution
///
/// ```text
/// J. Diaz del Rio (ODC Space)
/// B.V. Semenov (JPL)
/// W.L. Taber (JPL)
/// E.D. Wright (JPL)
/// ```
///
/// # Version
///
/// ```text
/// - SPICELIB Version 1.1.0, 06-JUL-2021 (JDR)
///
/// Changed the argument names LONGC and LONG to CLON and LON for
/// consistency with other routines.
///
/// Added IMPLICIT NONE statement.
///
/// Edited the header to comply with NAIF standard. Removed
/// unnecessary $Revisions section. Added complete code examples.
///
/// - SPICELIB Version 1.0.3, 26-JUL-2016 (BVS)
///
/// Minor headers edits.
///
/// - SPICELIB Version 1.0.2, 22-AUG-2001 (EDW)
///
/// Corrected ENDIF to END IF.
///
/// - SPICELIB Version 1.0.1, 10-MAR-1992 (WLT)
///
/// Comment section for permuted index source lines was added
/// following the header.
///
/// - SPICELIB Version 1.0.0, 31-JAN-1990 (WLT)
/// ```
pub fn cyllat(r: f64, clon: f64, z: f64, radius: &mut f64, lon: &mut f64, lat: &mut f64) {
CYLLAT(r, clon, z, radius, lon, lat);
}
//$Procedure CYLLAT ( Cylindrical to latitudinal )
pub fn CYLLAT(R: f64, CLON: f64, Z: f64, RADIUS: &mut f64, LON: &mut f64, LAT: &mut f64) {
let mut BIG: f64 = 0.0;
let mut X: f64 = 0.0;
let mut Y: f64 = 0.0;
let mut RHO: f64 = 0.0;
let mut LATTUD: f64 = 0.0;
//
// Local Variables
//
//
// Convert the input cylindrical coordinates to latitudinal
// coordinates, storing in temporary variables.
//
BIG = intrinsics::DMAX1(&[f64::abs(R), f64::abs(Z)]);
if (BIG > 0 as f64) {
X = (R / BIG);
Y = (Z / BIG);
RHO = (BIG * f64::sqrt(((X * X) + (Y * Y))));
} else {
RHO = 0.0;
}
if (RHO == 0.0) {
LATTUD = 0.0;
} else {
LATTUD = f64::atan2(Z, R);
}
//
// Move results to output variables
//
*LON = CLON;
*RADIUS = RHO;
*LAT = LATTUD;
//
}