mirror of
https://github.com/minetest-mods/magma_conduits.git
synced 2024-12-20 20:45:40 +01:00
75 lines
2.3 KiB
Lua
75 lines
2.3 KiB
Lua
-- These functions are a minor modification of the voxel area iterator defined in the built in voxelarea.lua lua code.
|
|
-- As such, this file is separately licened under the LGPL as follows:
|
|
|
|
-- License of Minetest source code
|
|
-------------------------------
|
|
|
|
--Minetest
|
|
--Copyright (C) 2010-2018 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 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.
|
|
|
|
--You should have received a copy of the GNU Lesser 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.
|
|
|
|
function VoxelArea:iter_xyz(minx, miny, minz, maxx, maxy, maxz)
|
|
local i = self:index(minx, miny, minz) - 1
|
|
|
|
local x = minx - 1 -- subtracting one because x gets incremented before it gets returned the first time.
|
|
local xrange = maxx - minx + 1
|
|
local nextaction = i + 1 + xrange
|
|
|
|
local y = 0
|
|
local yrange = maxy - miny + 1
|
|
local yreqstride = self.ystride - xrange
|
|
|
|
local z = 0
|
|
local zrange = maxz - minz + 1
|
|
local multistride = self.zstride - ((yrange - 1) * self.ystride + xrange)
|
|
|
|
return function()
|
|
-- continue i until it needs to jump
|
|
i = i + 1
|
|
x = x + 1
|
|
if i ~= nextaction then
|
|
return i, x, y+miny, z+minz
|
|
end
|
|
|
|
-- continue y until maxy is exceeded
|
|
y = y + 1
|
|
x = minx -- new line
|
|
if y ~= yrange then
|
|
-- set i to index(minx, miny + y, minz + z) - 1
|
|
i = i + yreqstride
|
|
nextaction = i + xrange
|
|
return i, x, y+miny, z+minz
|
|
end
|
|
|
|
-- continue z until maxz is exceeded
|
|
z = z + 1
|
|
if z == zrange then
|
|
-- cuboid finished, return nil
|
|
return
|
|
end
|
|
|
|
-- set i to index(minx, miny, minz + z) - 1
|
|
i = i + multistride
|
|
|
|
y = 0
|
|
nextaction = i + xrange
|
|
return i, x, y+miny, z+minz
|
|
end
|
|
end
|
|
|
|
function VoxelArea:iterp_xyz(minp, maxp)
|
|
return self:iter_xyz(minp.x, minp.y, minp.z, maxp.x, maxp.y, maxp.z)
|
|
end |