--[[

Fences - from minetest_game

GNU Lesser General Public License, version 2.1
Copyright (C) 2011-2016 celeron55, Perttu Ahola <celeron55@gmail.com>
Copyright (C) 2011-2016 Various Minetest developers and contributors

This program is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details:
https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html

]]--

fences = {}

function fences.register_fence(name, def)
	local fence_texture = "default_fence_overlay.png^" .. def.texture ..
			"^default_fence_overlay.png^[makealpha:255,126,126"
	-- Allow almost everything to be overridden
	local default_fields = {
		paramtype = "light",
		drawtype = "nodebox",
		node_box = {
			type = "connected",
			fixed = {{-1/8, -1/2, -1/8, 1/8, 1/2, 1/8}},
			connect_front = {{-1/16,3/16,-1/2,1/16,5/16,-1/8},
				{-1/16,-5/16,-1/2,1/16,-3/16,-1/8}},
			connect_left = {{-1/2,3/16,-1/16,-1/8,5/16,1/16},
				{-1/2,-5/16,-1/16,-1/8,-3/16,1/16}},
			connect_back = {{-1/16,3/16,1/8,1/16,5/16,1/2},
				{-1/16,-5/16,1/8,1/16,-3/16,1/2}},
			connect_right = {{1/8,3/16,-1/16,1/2,5/16,1/16},
				{1/8,-5/16,-1/16,1/2,-3/16,1/16}},
		},
		collision_box = {
			type = "connected",
			fixed = {{-1/8, -1/2, -1/8, 1/8, 1, 1/8}},
			connect_front = {{-1/8,-1/2,-1/2,1/8,1,-1/8}},
			connect_left = {{-1/2,-1/2,-1/8,-1/8,1,1/8}},
			connect_back = {{-1/8,-1/2,1/8,1/8,1,1/2}},
			connect_right = {{1/8,-1/2,-1/8,1/2,1,1/8}},
		},
		connects_to = {"group:fence", "group:wood"},
		inventory_image = fence_texture,
		wield_image = fence_texture,
		tiles = {def.texture},
		sunlight_propagates = true,
		is_ground_content = false,
		groups = def.groups or {},
	}
	for k, v in pairs(default_fields) do
		if not def[k] then
			def[k] = v
		end
	end

	-- Always add to the fence group, even if no group provided
	def.groups.fence = 1

	def.texture = nil
	def.material = nil

	minetest.register_node(name, def)
end