box_union.F90

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!! Copyright (C) 2021 M. Oliveira
!!
!! This program is free software; you can redistribute it and/or modify
!! it under the terms of the GNU General Public License as published by
!! the Free Software Foundation; either version 2, or (at your option)
!! any later version.
!!
!! This program is distributed in the hope that it will be useful,
!! but WITHOUT ANY WARRANTY; without even the implied warranty of
!! MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
!! GNU General Public License for more details.
!!
!! You should have received a copy of the GNU General Public License
!! along with this program; if not, write to the Free Software
!! Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
!! 02110-1301, USA.
!!
 
#include "global.h"
 
module box_union_oct_m
  use box_oct_m
  use debug_oct_m
  use multibox_oct_m
  use namespace_oct_m
  use global_oct_m
  use linked_list_oct_m
  use messages_oct_m
  use namespace_oct_m
  use profiling_oct_m
  use unit_oct_m
 
  implicit none
 
  private
  public ::           &
    box_union_t
 
  type, extends(multibox_t) :: box_union_t
    private
  contains
    procedure :: contains_points => box_union_contains_points
    procedure :: write_info => box_union_write_info
    procedure :: short_info => box_union_short_info
    final     :: box_union_finalize
  end type box_union_t
 
  interface box_union_t
    procedure box_union_constructor
  end interface box_union_t
 
contains
 
  !--------------------------------------------------------------
  function box_union_constructor(dim) result(box)
    integer, intent(in) :: dim
    class(box_union_t), pointer :: box
 
    push_sub(box_union_constructor)
 
    ! Allocate memory
    safe_allocate(box)
    safe_allocate(box%bounding_box_l(1:dim))
 
    ! Initialize box
    box%dim = dim
    box%bounding_box_l = m_zero
 
    pop_sub(box_union_constructor)
  end function box_union_constructor
 
  !--------------------------------------------------------------
  subroutine box_union_finalize(this)
    type(box_union_t), intent(inout) :: this
 
    push_sub(box_union_finalize)
 
    call multibox_end(this)
 
    pop_sub(box_union_finalize)
  end subroutine box_union_finalize
 
  !--------------------------------------------------------------
  recursive function box_union_contains_points(this, nn, xx) result(contained)
    class(box_union_t), intent(in) :: this
    integer,            intent(in) :: nn
    real(real64), contiguous,  intent(in) :: xx(:,:)
    logical :: contained(nn)
 
    integer :: ip
    real(real64) :: point(1:this%dim)
    type(box_iterator_t) :: iter
    class(box_t), pointer :: box
 
    ! A point must be inside at least one box to be considered inside an union of boxes
    do ip = 1, nn
      point(1:this%dim) = xx(ip, 1:this%dim)
      contained(ip) = .false.
 
      call iter%start(this%list)
      do while (iter%has_next())
        box => iter%get_next()
        contained(ip) = box%contains_point(point)
        if (contained(ip)) exit
      end do
 
      contained(ip) = contained(ip) .neqv. this%is_inside_out()
    end do
 
  end function box_union_contains_points
 
  !--------------------------------------------------------------
  subroutine box_union_write_info(this, iunit, namespace)
    class(box_union_t),          intent(in) :: this
    integer,           optional, intent(in) :: iunit
    type(namespace_t), optional, intent(in) :: namespace
 
    push_sub(box_union_write_info)
 
    ! Todo: need to decide how best to display the information of the boxes that make the union
 
    pop_sub(box_union_write_info)
  end subroutine box_union_write_info
 
  !--------------------------------------------------------------
  character(len=BOX_INFO_LEN) function box_union_short_info(this, unit_length) result(info)
    class(box_union_t), intent(in) :: this
    type(unit_t),       intent(in) :: unit_length
 
    push_sub(box_union_short_info)
 
    ! Todo: need to decide how best to display the information of the boxes that make the union
    info = ''
 
    pop_sub(box_union_short_info)
  end function box_union_short_info
 
end module box_union_oct_m
 
!! Local Variables:
!! mode: f90
!! coding: utf-8
!! End: