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https://github.com/joe7575/techpack.git
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439 lines
13 KiB
Lua
439 lines
13 KiB
Lua
--[[
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Tube Library
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============
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Copyright (C) 2017 Joachim Stolberg
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LGPLv2.1+
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See LICENSE.txt for more information
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History:
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see init.lua
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]]--
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local MAX_TUBE_LENGTH = 100
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local TubeTypes = {
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0,0,0,0,0,0,1,3,1,3, -- 01-10
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4,5,3,1,3,1,4,5,1,3, -- 11-20
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1,3,4,5,3,1,3,1,4,5, -- 21-30
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2,2,2,2,0,2,2,2,5,2, -- 31-40
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5,0, -- 40-41
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}
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local TubeFacedir = {
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0,0,0,0,0,0,0,2,0,1, -- 01-10
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2,2,2,1,3,1,3,3,0,3, -- 11-20
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0,0,0,0,1,1,0,1,1,1, -- 21-30
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0,0,0,0,0,0,0,0,0,0, -- 31-40
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0,0, -- 40-41
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}
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tubelib.knownNodes = {
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["tubelib:tube1"] = true,
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["tubelib:tube2"] = true,
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["tubelib:tube3"] = true,
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["tubelib:tube4"] = true,
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["tubelib:tube5"] = true,
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["tubelib:tube6"] = true,
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["default:chest_locked"] = true,
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["default:chest"] = true,
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["default:furnace"] = true,
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["default:furnace_active"] = true,
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}
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-- Localize functions to avoid table lookups (better performance).
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local string_find = string.find
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local minetest_get_meta = minetest.get_meta
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local minetest_get_node = minetest.get_node
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local KnownNodes = tubelib.knownNodes
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local vector_add = vector.add
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local vector_equals = vector.equals
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-- Translate from contact side to facedir
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local SideToFacedir = {B=0, R=1, F=2, L=3, D=4, U=5}
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-- 6D variant of the facedir to dir conversion
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local Facedir2Dir = {[0] =
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{x=0, y=0, z=1},
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{x=1, y=0, z=0},
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{x=0, y=0, z=-1},
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{x=-1, y=0, z=0},
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{x=0, y=-1, z=0},
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{x=0, y=1, z=0},
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}
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-- Determine position from and facedir to the node on the other side or the tubes.
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-- Param pos: my pos
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-- Param npos: neighbor tube pos
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local function remote_node(pos, npos)
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local dest_pos = minetest.string_to_pos(minetest.get_meta(npos):get_string("dest_pos"))
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-- two possible reasons, why dest_pos == pos:
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-- 1) wrong side of a single tube node
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-- 2) node connected with itself. In this case "dest_pos2" is not available
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if dest_pos and vector_equals(dest_pos, pos) then
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local dest_pos2 = minetest.string_to_pos(minetest.get_meta(npos):get_string("dest_pos2"))
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if dest_pos2 == nil then
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local facedir = minetest.get_meta(npos):get_int("facedir")
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return pos, facedir -- node connected with itself
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else
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local facedir2 = minetest.get_meta(npos):get_int("facedir2")
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return dest_pos2, facedir2 -- one tube connection
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end
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else
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local facedir = minetest.get_meta(npos):get_int("facedir")
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return dest_pos, facedir -- multi tube connection
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end
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end
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-- Calculate the facedir to the other node, based on both node positions
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local function dir_to_facedir(my_pos, other_pos)
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if my_pos.z ~= other_pos.z then return my_pos.z - other_pos.z + 1 end
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if my_pos.x ~= other_pos.x then return my_pos.x - other_pos.x + 2 end
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if my_pos.y > other_pos.y then return 5 else return 4 end
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end
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-------------------------------------------------------------------------------
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-- API functions
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-------------------------------------------------------------------------------
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-- Determine neighbor position and own facedir to the node.
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-- based on own pos and contact side 'B' - 'U'.
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-- Function considers also tube connections.
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function tubelib.get_neighbor_pos(pos, side)
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local facedir = SideToFacedir[side]
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if facedir < 4 then
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local node = minetest_get_node(pos)
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facedir = (facedir + node.param2) % 4
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end
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local npos = vector_add(pos, Facedir2Dir[facedir])
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local node = minetest_get_node(npos)
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if node and string_find(node.name, "tubelib:tube") then
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npos, facedir = remote_node(pos, npos)
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end
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return npos, facedir
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end
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-- use Voxel Manipulator to read the node
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function tubelib.read_node_with_vm(pos)
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local vm = VoxelManip()
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local MinEdge, MaxEdge = vm:read_from_map(pos, pos)
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local data = vm:get_data()
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local param2_data = vm:get_param2_data()
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local area = VoxelArea:new({MinEdge = MinEdge, MaxEdge = MaxEdge})
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return {
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name=minetest.get_name_from_content_id(data[area:index(pos.x, pos.y, pos.z)]),
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param2 = param2_data[area:index(pos.x, pos.y, pos.z)]
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}
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end
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local read_node_with_vm = tubelib.read_node_with_vm
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-------------------------------------------------------------------------------
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-- Tube placement
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-------------------------------------------------------------------------------
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-- Return neighbor tubes orientation relative to the given pos.
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local function get_neighbor_tubes_orientation(pos)
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local orientation = 0
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local Nodes = {
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minetest.get_node({x=pos.x , y=pos.y , z=pos.z+1}),
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minetest.get_node({x=pos.x+1, y=pos.y , z=pos.z }),
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minetest.get_node({x=pos.x , y=pos.y , z=pos.z-1}),
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minetest.get_node({x=pos.x-1, y=pos.y , z=pos.z }),
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minetest.get_node({x=pos.x , y=pos.y-1, z=pos.z }),
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minetest.get_node({x=pos.x , y=pos.y+1, z=pos.z }),
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}
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for side,node in ipairs(Nodes) do
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if KnownNodes[node.name] then -- registered node?
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orientation = orientation * 6 + side
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if orientation > 6 then
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break
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end
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end
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end
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return orientation
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end
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local function determine_tube_node(pos)
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local node = minetest.get_node(pos)
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if not string.find(node.name, "tubelib:tube") then
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return nil
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end
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local orientation = get_neighbor_tubes_orientation(pos)
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if orientation > 6 then
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node.name = "tubelib:tube"..TubeTypes[orientation]
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node.param2 = TubeFacedir[orientation]
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return node
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elseif orientation > 0 then
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orientation = orientation * 6 + (((node.param2 + 2) % 4) + 1)
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node.name = "tubelib:tube"..TubeTypes[orientation]
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node.param2 = TubeFacedir[orientation]
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return node
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end
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return nil
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end
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local function update_tube(pos)
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local node = determine_tube_node(pos)
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if node then
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minetest.swap_node(pos, node)
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end
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end
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local OffsTable = {
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{2,0}, -- tube1
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{4,5}, -- tube2
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{2,3}, -- tube3
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{2,4}, -- tube4
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{2,5}, -- tube5
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}
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-- The tube on 'pos1' has two ends and thus two neighbor position.
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-- One is the given 'pos', the other position is returned.
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-- Param mpos: my node position
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-- Param opos: the other tube position
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-- Param node: the tube node
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local function nodetype_to_pos(mpos, opos, node)
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local idx = string.byte(node.name, -1) - 48
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local facedir1 = OffsTable[idx][1]
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local facedir2 = OffsTable[idx][2]
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if facedir1 < 4 then
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facedir1 = (facedir1 + node.param2) % 4
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end
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if facedir2 < 4 then
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facedir2 = (facedir2 + node.param2) % 4
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end
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local dir1 = Facedir2Dir[facedir1]
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local dir2 = Facedir2Dir[facedir2]
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local p1 = vector.add(opos, dir1)
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local p2 = vector.add(opos, dir2)
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if mpos == nil then
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return p1, p2
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elseif vector.equals(p1, mpos) then
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return p2
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else
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return p1
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end
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end
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-- Walk to the other end of the tube line, starting at 'pos1'.
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-- Returns: cnt - number of tube nodes
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-- pos - the peer tube node
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-- pos1 - the destination position, connected with 'pos'
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local function walk_to_peer(pos, pos1)
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local node = minetest.get_node(pos1)
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local pos2
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local cnt = 0
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while string.find(node.name, "tubelib:tube") and cnt < MAX_TUBE_LENGTH do
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pos2 = nodetype_to_pos(pos, pos1, node)
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pos, pos1 = pos1, pos2
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cnt = cnt + 1
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node = minetest.get_node_or_nil(pos1) or read_node_with_vm(pos1)
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end
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return cnt, pos, pos1
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end
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-- Update head tubes with peer pos and facedir of the other end
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-- Needed for StackItem exchange.
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local function update_head_tubes(pos)
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local node = minetest.get_node(pos)
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if string.find(node.name, "tubelib:tube") then
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local pos1, pos2 = nodetype_to_pos(nil, pos, node)
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local cnt1, peer1, dest1 = walk_to_peer(pos, pos1)
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local cnt2, peer2, dest2 = walk_to_peer(pos, pos2)
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if cnt1 == 0 and cnt2 == 0 then -- first tube node placed?
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-- we have to store both dest positions
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minetest.get_meta(peer1):set_string("dest_pos", minetest.pos_to_string(dest1))
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minetest.get_meta(peer1):set_int("facedir", dir_to_facedir(peer1, dest1))
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minetest.get_meta(peer1):set_string("dest_pos2", minetest.pos_to_string(dest2))
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minetest.get_meta(peer1):set_int("facedir2", dir_to_facedir(peer2, dest2))
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else
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minetest.get_meta(peer1):set_string("dest_pos", minetest.pos_to_string(dest2))
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minetest.get_meta(peer1):set_int("facedir", dir_to_facedir(peer2, dest2))
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minetest.get_meta(peer2):set_string("dest_pos", minetest.pos_to_string(dest1))
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minetest.get_meta(peer2):set_int("facedir", dir_to_facedir(peer1, dest1))
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end
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-- delete meta data from old head nodes
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if cnt1 > 1 then
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minetest.get_meta(pos1):from_table(nil)
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end
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if cnt2 > 1 then
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minetest.get_meta(pos2):from_table(nil)
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end
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return cnt1 + cnt2
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end
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return 0
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end
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-- Update all tubes arround the currently placed tube
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local function update_surrounding_tubes(pos)
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update_tube({x=pos.x , y=pos.y , z=pos.z+1})
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update_tube({x=pos.x+1, y=pos.y , z=pos.z })
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update_tube({x=pos.x , y=pos.y , z=pos.z-1})
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update_tube({x=pos.x-1, y=pos.y , z=pos.z })
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update_tube({x=pos.x , y=pos.y-1, z=pos.z })
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update_tube({x=pos.x , y=pos.y+1, z=pos.z })
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update_tube(pos)
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return update_head_tubes(pos) < MAX_TUBE_LENGTH
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end
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-- Update tubes after a tube node is removed
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local function after_tube_removed(pos, node)
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local pos1, pos2 = nodetype_to_pos(nil, pos, node)
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update_head_tubes(pos1)
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update_head_tubes(pos2)
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end
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-- API function, called from all nodes, which shall be connected to tubes
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function tubelib.update_tubes(pos)
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update_tube( {x=pos.x , y=pos.y , z=pos.z+1})
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update_head_tubes({x=pos.x , y=pos.y , z=pos.z+1})
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update_tube( {x=pos.x+1, y=pos.y , z=pos.z })
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update_head_tubes({x=pos.x+1, y=pos.y , z=pos.z })
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update_tube( {x=pos.x , y=pos.y , z=pos.z-1})
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update_head_tubes({x=pos.x , y=pos.y , z=pos.z-1})
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update_tube( {x=pos.x-1, y=pos.y , z=pos.z })
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update_head_tubes({x=pos.x-1, y=pos.y , z=pos.z })
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update_tube( {x=pos.x , y=pos.y-1, z=pos.z })
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update_head_tubes({x=pos.x , y=pos.y-1, z=pos.z })
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update_tube( {x=pos.x , y=pos.y+1, z=pos.z })
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update_head_tubes({x=pos.x , y=pos.y+1, z=pos.z })
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end
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local DefNodeboxes = {
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-- x1 y1 z1 x2 y2 z2
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{ -1/4, -1/4, -1/4, 1/4, 1/4, 1/4 },
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{ -1/4, -1/4, -1/4, 1/4, 1/4, 1/4 },
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}
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local DirCorrections = {
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{3, 6}, {2, 5}, -- standard tubes
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{3, 1}, {3, 2}, {3, 5}, -- knees from front to..
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}
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local SelectBoxes = {
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{ -1/4, -1/4, -1/2, 1/4, 1/4, 1/2 },
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{ -1/4, -1/2, -1/4, 1/4, 1/2, 1/4 },
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{ -1/2, -1/4, -1/2, 1/4, 1/4, 1/4 },
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{ -1/4, -1/2, -1/2, 1/4, 1/4, 1/4 },
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{ -1/4, -1/4, -1/2, 1/4, 1/2, 1/4 },
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}
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local TilesData = {
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-- up, down, right, left, back, front
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{
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"tubelib_tube.png^[transformR90",
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"tubelib_tube.png^[transformR90",
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"tubelib_tube.png",
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"tubelib_tube.png",
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"tubelib_hole.png",
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"tubelib_hole.png",
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},
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{
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"tubelib_hole.png",
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"tubelib_hole.png",
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"tubelib_tube.png^[transformR90",
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"tubelib_tube.png^[transformR90",
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"tubelib_tube.png^[transformR90",
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"tubelib_tube.png^[transformR90",
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},
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{
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"tubelib_knee.png^[transformR270",
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"tubelib_knee.png^[transformR180",
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"tubelib_knee2.png^[transformR270",
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"tubelib_hole2.png^[transformR90",
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"tubelib_knee2.png^[transformR90",
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"tubelib_hole2.png^[transformR270",
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},
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{
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"tubelib_knee2.png",
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"tubelib_hole2.png^[transformR180",
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"tubelib_knee.png^[transformR270",
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"tubelib_knee.png",
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"tubelib_knee2.png",
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"tubelib_hole2.png",
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},
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{
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"tubelib_hole2.png",
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"tubelib_knee2.png^[transformR180",
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"tubelib_knee.png^[transformR180",
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"tubelib_knee.png^[transformR90",
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"tubelib_knee2.png^[transformR180",
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"tubelib_hole2.png^[transformR180",
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},
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}
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for idx,pos in ipairs(DirCorrections) do
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node_box_data = table.copy(DefNodeboxes)
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node_box_data[1][pos[1]] = node_box_data[1][pos[1]] * 2
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node_box_data[2][pos[2]] = node_box_data[2][pos[2]] * 2
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tiles_data = TilesData[idx]
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if idx == 1 then
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hidden = 0
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else
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hidden = 1
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end
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minetest.register_node("tubelib:tube"..idx, {
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description = "Tubelib Tube",
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tiles = tiles_data,
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drawtype = "nodebox",
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node_box = {
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type = "fixed",
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fixed = node_box_data,
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},
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selection_box = {
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type = "fixed",
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fixed = SelectBoxes[idx],
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},
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collision_box = {
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type = "fixed",
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fixed = SelectBoxes[idx],
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},
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after_place_node = function(pos, placer, itemstack, pointed_thing)
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if update_surrounding_tubes(pos) == false then
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after_tube_removed(pos, minetest.get_node(pos))
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minetest.remove_node(pos)
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return itemstack
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end
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end,
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after_dig_node = function(pos, oldnode, oldmetadata, digger)
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after_tube_removed(pos, oldnode)
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end,
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paramtype2 = "facedir",
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paramtype = "light",
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sunlight_propagates = true,
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is_ground_content = false,
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groups = {choppy=2, cracky=3, stone=1, not_in_creative_inventory=hidden},
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drop = "tubelib:tube1",
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sounds = default.node_sound_wood_defaults(),
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})
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end
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minetest.register_craft({
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output = "tubelib:tube1 4",
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recipe = {
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{"default:steel_ingot", "", "group:wood"},
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{"", "group:wood", ""},
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{"group:wood", "", "default:tin_ingot"},
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},
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})
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