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gezelter |
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module switcheroo |
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use definitions |
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implicit none |
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PRIVATE |
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#define __FORTRAN90 |
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#include "UseTheForce/fSwitchingFunction.h" |
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real ( kind = dp ), dimension(NSWITCHTYPES) :: rin |
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real ( kind = dp ), dimension(NSWITCHTYPES) :: rout |
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real ( kind = dp ), dimension(NSWITCHTYPES) :: rin2 |
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real ( kind = dp ), dimension(NSWITCHTYPES) :: rout2 |
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logical, dimension(NSWITCHTYPES) :: isOK |
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public::set_switch |
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public::get_switch |
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contains |
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subroutine set_switch(SwitchType, rinner, router) |
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real ( kind = dp ), intent(in):: rinner, router |
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integer, intent(in) :: SwitchType |
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if (SwitchType .gt. NSWITCHTYPES) then |
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write(default_error, *) & |
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'set_switch: not that many switch types! ' |
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return |
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endif |
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isOK(SwitchType) = .false. |
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if (router .lt. rinner) then |
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write(default_error, *) & |
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'set_switch: router is less than rinner ' |
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return |
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endif |
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if ((router .lt. 0.0d0) .or. (rinner .lt. 0.0d0)) then |
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write(default_error, *) & |
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'set_switch: one of the switches is negative!' |
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return |
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endif |
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rin(SwitchType) = rinner |
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rout(SwitchType) = router |
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rin2(SwitchType) = rinner * rinner |
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rout2(SwitchType) = router * router |
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isOK(SwitchType) = .true. |
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end subroutine set_switch |
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subroutine get_switch(r2, sw, dswdr, r, SwitchType, in_switching_region) |
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real( kind = dp ), intent(in) :: r2 |
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real( kind = dp ), intent(inout) :: sw, dswdr, r |
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real( kind = dp ) :: ron, roff |
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integer, intent(in) :: SwitchType |
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logical, intent(inout) :: in_switching_region |
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sw = 0.0d0 |
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dswdr = 0.0d0 |
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in_switching_region = .false. |
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if (.not.isOK(SwitchType)) then |
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write(default_error, *) & |
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'get_switch: this switching function has not been set up!' |
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return |
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endif |
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if (r2.lt.rout2(SwitchType)) then |
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if (r2.lt.rin2(SwitchType)) then |
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sw = 1.0d0 |
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dswdr = 0.0d0 |
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return |
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else |
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r = dsqrt(r2) |
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ron = rin(SwitchType) |
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roff = rout(SwitchType) |
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sw = (roff + 2.0d0*r - 3.0d0*ron)*(roff-r)**2/ ((roff-ron)**3) |
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dswdr = 6.0d0*(r*r - r*ron - r*roff +roff*ron)/((roff-ron)**3) |
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in_switching_region = .true. |
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return |
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endif |
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else |
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return |
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endif |
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end subroutine get_switch |
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end module switcheroo |
