k_smallblocks/generate_nodeboxes.lua

--[[

k_smallblocks is a Minetest mod that adds smaller blocks to minetest aswell as 
its own node placement prediction/system

Copyright (C) 2019 Kurtzmusch

This file is part of k_smallblocks

k_smallblocks 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.

k_smallblocks 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.

You should have received a copy of the GNU Lesser General Public License along
with k_smallblocks. If not, see <https://www.gnu.org/licenses/>.

--]]

nodeboxes = {}

smallblocks.nodeboxes = nodeboxes

local function box_from_point( point )
	
	local nodebox = { point.x, point.y, point.z, point.x+0.5, point.y+0.5, point.z+0.5 }
	return nodebox
end

for key_int, val_bitmap_as_int in pairs(smallblocks.origin_bitmaps) do
	local bitmap = util.integer_to_bitmap( val_bitmap_as_int )
	local bitmap_as_array = util.bitmap_to_array3d( bitmap )
	local index = 1
	local max_index = 1
	nodeboxes[key_int] = {}
	minetest.log("none", "generating nodebox for ".. key_int.. ">>".. val_bitmap_as_int )
	local gen_string = ""
	local bitmap_string = ""
	for ix = 0, max_index, 1 do
		for iy = 0, max_index, 1 do
			for iz = 0, max_index, 1 do
				bitmap_string = bitmap_string .. bitmap_as_array[ix][iy][iz]
				if( bitmap_as_array[ix][iy][iz] == 1) then
					nodeboxes[key_int][index] = box_from_point( { x=ix/2-0.5, y=iy/2-0.5, z=iz/2-0.5} )
					index = index + 1
					gen_string = gen_string .."{"
					for k, v in pairs(nodeboxes[key_int][index-1]) do
						gen_string = gen_string..v..", "
					end
					gen_string = gen_string .."} "
				end
			end
		end
	end
	
	minetest.log("none", bitmap_string)
	minetest.log("none", gen_string )
end