note
	description: "[
		subsector_t from r_defs.h
		
		A SubSector.
		References a Sector.
		Basically, this is a list of LineSegs,
		indicating the visible walls that define
		(all or some) sides of a convex BSP leaf.
	]"
	license: "[
				Copyright (C) 1993-1996 by id Software, Inc.
				Copyright (C) 2005-2014 Simon Howard
				Copyright (C) 2021 Ilgiz Mustafin
		
				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 of the License, 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.
	]"

class 
	SUBSECTOR_T

create 
	default_create,
	from_pointer

feature 

	sector: detachable SECTOR_T assign set_sector

	set_sector (a_sector: like sector)
		do
			sector := a_sector
		end

	numlines: INTEGER_16

	firstline: INTEGER_16
	
feature 

	from_pointer (m: MANAGED_POINTER; offset: INTEGER_32)
		do
			numlines := m.read_integer_16_le (offset)
			firstline := m.read_integer_16_le (offset + 2)
		end

	Structure_size: INTEGER_32 = 4
	
end -- class SUBSECTOR_T

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