Add doors

diff --git a/mods/doors/README.txt b/mods/doors/README.txt
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+Minetest 0.4 mod: doors
+========================
+
+License of source code:
+-----------------------
+Original license text:
+--    (c) 2011 Fernando Zapata
+--    Code licensed under GNU GPLv3
+--    Content licensed under CC BY-SA 3.0
+--    2012-01-08    11:03:57
+
+There has been unsuccesful attempts to contact the original author. Thus,
+based on the intentions of the author, it is assumed that this code is
+distributable and modifiable under GPLv2+later, under which Minetest is
+distributed.
+
+Modifications:
+  Copyright (C) 2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+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.
+
+http://www.gnu.org/licenses/gpl-2.0.html
+
+License of media (textures and sounds)
+--------------------------------------
+Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)                                 
+http://creativecommons.org/licenses/by-sa/3.0/
+
+Authors of media files
+-----------------------
+Everything not listed in here:
+Copyright (C) 2010-2012 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+From the original zlpdoors mod by Fernando Zapata:
+  door_wood_a.png
+  door_wood_a_r.png
+  door_wood_b.png
+  door_wood_b_r.png
+  door_wood.png
+  

diff --git a/mods/doors/depends.txt b/mods/doors/depends.txt
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+default

diff --git a/mods/doors/init.lua b/mods/doors/init.lua
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+-- Minetest 0.4 mod: doors
+-- See README.txt for licensing and other information.
+--------------------------------------------------------------------------------
+
+local WALLMX = 3
+local WALLMZ = 5
+local WALLPX = 2
+local WALLPZ = 4
+
+--------------------------------------------------------------------------------
+
+minetest.register_alias('door', 'doors:door_wood')
+minetest.register_alias('door_wood', 'doors:door_wood')
+
+minetest.register_node( 'doors:door_wood', {
+       description         = 'Wooden Door',
+       drawtype            = 'signlike',
+       tile_images         = { 'door_wood.png' },
+       inventory_image     = 'door_wood.png',
+       wield_image         = 'door_wood.png',
+       paramtype2          = 'wallmounted',
+       selection_box       = { type = 'wallmounted' },
+       groups              = { choppy=2, dig_immediate=2 },
+})
+
+minetest.register_craft( {
+       output              = 'doors:door_wood',
+       recipe = {
+               { 'default:wood', 'default:wood' },
+               { 'default:wood', 'default:wood' },
+               { 'default:wood', 'default:wood' },
+       },
+})
+
+minetest.register_craft({
+       type = 'fuel',
+       recipe = 'doors:door_wood',
+       burntime = 30,
+})
+
+minetest.register_node( 'doors:door_wood_a_c', {
+       Description         = 'Top Closed Door',
+       drawtype            = 'signlike',
+       tile_images         = { 'door_wood_a.png' },
+       inventory_image     = 'door_wood_a.png',
+       paramtype           = 'light',
+       paramtype2          = 'wallmounted',
+       walkable            = true,
+       selection_box       = { type = "wallmounted", },
+       groups              = { choppy=2, dig_immediate=2 },
+       legacy_wallmounted  = true,
+       drop                = 'doors:door_wood',
+})
+
+minetest.register_node( 'doors:door_wood_b_c', {
+       Description         = 'Bottom Closed Door',
+       drawtype            = 'signlike',
+       tile_images         = { 'door_wood_b.png' },
+       inventory_image     = 'door_wood_b.png',
+       paramtype           = 'light',
+       paramtype2          = 'wallmounted',
+       walkable            = true,
+       selection_box       = { type = "wallmounted", },
+       groups              = { choppy=2, dig_immediate=2 },
+       legacy_wallmounted  = true,
+       drop                = 'doors:door_wood',
+})
+
+minetest.register_node( 'doors:door_wood_a_o', {
+       Description         = 'Top Open Door',
+       drawtype            = 'signlike',
+       tile_images         = { 'door_wood_a_r.png' },
+       inventory_image     = 'door_wood_a_r.png',
+       paramtype           = 'light',
+       paramtype2          = 'wallmounted',
+       walkable            = false,
+       selection_box       = { type = "wallmounted", },
+       groups              = { choppy=2, dig_immediate=2 },
+       legacy_wallmounted  = true,
+       drop                = 'doors:door_wood',
+})
+
+minetest.register_node( 'doors:door_wood_b_o', {
+       Description         = 'Bottom Open Door',
+       drawtype            = 'signlike',
+       tile_images         = { 'door_wood_b_r.png' },
+       inventory_image     = 'door_wood_b_r.png',
+       paramtype           = 'light',
+       paramtype2          = 'wallmounted',
+       walkable            = false,
+       selection_box       = { type = "wallmounted", },
+       groups              = { choppy=2, dig_immediate=2 },
+       legacy_wallmounted  = true,
+       drop                = 'doors:door_wood',
+})
+
+--------------------------------------------------------------------------------
+
+local round = function( n )
+       if n >= 0 then
+               return math.floor( n + 0.5 )
+       else
+               return math.ceil( n - 0.5 )
+       end
+end
+
+local on_door_placed = function( pos, node, placer )
+       if node.name ~= 'doors:door_wood' then return end
+
+       upos = { x = pos.x, y = pos.y - 1, z = pos.z }
+       apos = { x = pos.x, y = pos.y + 1, z = pos.z }
+       und = minetest.env:get_node( upos )
+       abv = minetest.env:get_node( apos )
+
+       dir = placer:get_look_dir()
+
+       if     round( dir.x ) == 1  then
+               newparam = WALLPX
+       elseif round( dir.x ) == -1 then
+               newparam = WALLMX
+       elseif round( dir.z ) == 1  then
+               newparam = WALLPZ
+       elseif round( dir.z ) == -1 then
+               newparam = WALLMZ
+       end
+
+       if und.name == 'air' then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_a_c', param2 = newparam } )
+               minetest.env:add_node( upos, { name = 'doors:door_wood_b_c', param2 = newparam } )
+       elseif abv.name == 'air' then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_b_c', param2 = newparam } )
+               minetest.env:add_node( apos, { name = 'doors:door_wood_a_c', param2 = newparam } )
+       else
+               minetest.env:remove_node( pos )
+               placer:get_inventory():add_item( "main", 'doors:door_wood' )
+               minetest.chat_send_player( placer:get_player_name(), 'not enough space' )
+       end
+end
+
+local on_door_punched = function( pos, node, puncher )
+       if string.find( node.name, 'doors:door_wood' ) == nil then return end
+
+       upos = { x = pos.x, y = pos.y - 1, z = pos.z }
+       apos = { x = pos.x, y = pos.y + 1, z = pos.z }
+
+       if string.find( node.name, '_c', -2 ) ~= nil then
+               if     node.param2 == WALLPX then
+                       newparam = WALLMZ
+               elseif node.param2 == WALLMZ then
+                       newparam = WALLMX
+               elseif node.param2 == WALLMX then
+                       newparam = WALLPZ
+               elseif node.param2 == WALLPZ then
+                       newparam = WALLPX
+               end
+       elseif string.find( node.name, '_o', -2 ) ~= nil then
+               if     node.param2 == WALLMZ then
+                       newparam = WALLPX
+               elseif node.param2 == WALLMX then
+                       newparam = WALLMZ
+               elseif node.param2 == WALLPZ then
+                       newparam = WALLMX
+               elseif node.param2 == WALLPX then
+                       newparam = WALLPZ
+               end
+       end
+
+       if ( node.name == 'doors:door_wood_a_c' ) then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_a_o', param2 = newparam } )
+               minetest.env:add_node( upos, { name = 'doors:door_wood_b_o', param2 = newparam } )
+
+       elseif ( node.name == 'doors:door_wood_b_c' ) then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_b_o', param2 = newparam } )
+               minetest.env:add_node( apos, { name = 'doors:door_wood_a_o', param2 = newparam } )
+
+       elseif ( node.name == 'doors:door_wood_a_o' ) then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_a_c', param2 = newparam } )
+               minetest.env:add_node( upos, { name = 'doors:door_wood_b_c', param2 = newparam } )
+
+       elseif ( node.name == 'doors:door_wood_b_o' ) then
+               minetest.env:add_node( pos,  { name = 'doors:door_wood_b_c', param2 = newparam } )
+               minetest.env:add_node( apos, { name = 'doors:door_wood_a_c', param2 = newparam } )
+
+       end
+end
+
+local on_door_digged = function( pos, node, digger )
+       upos = { x = pos.x, y = pos.y - 1, z = pos.z }
+       apos = { x = pos.x, y = pos.y + 1, z = pos.z }
+
+       if ( node.name == 'doors:door_wood_a_c' ) or ( node.name == 'doors:door_wood_a_o' ) then
+               minetest.env:remove_node( upos )
+       elseif ( node.name == 'doors:door_wood_b_c' ) or ( node.name == 'doors:door_wood_b_o' ) then
+               minetest.env:remove_node( apos )
+       end
+end
+
+--------------------------------------------------------------------------------
+
+minetest.register_on_placenode( on_door_placed )
+minetest.register_on_punchnode( on_door_punched )
+minetest.register_on_dignode( on_door_digged )
+
+--------------------------------------------------------------------------------
+

diff --git a/mods/doors/textures/door_wood.png b/mods/doors/textures/door_wood.png
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diff --git a/mods/doors/textures/door_wood_a.png b/mods/doors/textures/door_wood_a.png
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diff --git a/mods/doors/textures/door_wood_a_r.png b/mods/doors/textures/door_wood_a_r.png
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diff --git a/mods/doors/textures/door_wood_b.png b/mods/doors/textures/door_wood_b.png
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diff --git a/mods/doors/textures/door_wood_b_r.png b/mods/doors/textures/door_wood_b_r.png
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