int_g1_box Function

public pure function int_g1_box(r) result(val)

Integral of box filter from 0 to r.

Arguments

Type IntentOptional Attributes Name
real(kind=wp), intent(in) :: r

Distance from filter center

Return Value real(kind=wp)

Result


Source Code

    pure function int_g1_box(r) result(val)
      !> Integral of box filter from 0 to r.
      implicit none
      real(wp), intent(in) :: r                                                !! Distance from filter center
      real(wp)             :: val                                              !! Result
      ! Work variable
      real(wp) :: new_r

      new_r = min(max(r,-1.0_wp),1.0_wp)
      val=0.5_wp*new_r

      return
    end function int_g1_box