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C Library Functions  - norm_angle_deg (3)

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NAME

norm_angle_deg(3f) - [M_units:TRIGONOMETRY] Return input angle given in degrees as angle between 0 and 360 (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Results
Example
License

SYNOPSIS

elemental function norm_angle_deg(ang) result(rev)

     doubleprecision, intent(in) :: ang
     doubleprecision             :: rev
        or
     real, intent(in) :: ang
     real             :: rev
        or
     integer, intent(in) :: ang
     integer             :: rev

DESCRIPTION

Given an input angle in degrees, normalize the value to fall in the range 0 to 360 degrees.

OPTIONS

ang	Input angle (degrees)

RESULTS

rev	Return input angle (degrees) normalized to range 0 to 360 degrees

EXAMPLE

Sample program:

   program demo_norm_angle_deg
   use M_units, only : norm_angle_deg
   implicit none
   real,parameter :: PI=360
   real           :: val
   integer        :: i
   do i=-2,2
      val=i*2*pi;   write(*,*)val,norm_angle_deg(val)
      val=i*pi;     write(*,*)val,norm_angle_deg(val)
      val=i*pi/2;   write(*,*)val,norm_angle_deg(val)
      write(*,*)
   enddo
   end program demo_norm_angle_deg

Results:

     -1440.00000       0.00000000
     -720.000000       0.00000000
     -360.000000       0.00000000

     -720.000000       0.00000000
     -360.000000       0.00000000
     -180.000000       180.000000

      0.00000000       0.00000000
      0.00000000       0.00000000
      0.00000000       0.00000000

      720.000000       0.00000000
      360.000000       0.00000000
      180.000000       180.000000

      1440.00000       0.00000000
      720.000000       0.00000000
      360.000000       0.00000000

LICENSE

MIT License

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Nemo Release 3.1

norm_angle_deg (3)

February 23, 2025

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