mcstair = {} local get_stair_param = function(node) local stair = minetest.get_item_group(node.name, "stair") if stair == 1 then return node.param2 elseif stair == 2 then if node.param2 < 12 then return node.param2 + 4 else return node.param2 - 4 end elseif stair == 3 then if node.param2 < 12 then return node.param2 + 8 else return node.param2 - 8 end end end local get_stair_from_param = function(param, stairs) if param < 12 then if param < 4 then return {name = stairs[1], param2 = param} elseif param < 8 then return {name = stairs[2], param2 = param - 4} else return {name = stairs[3], param2 = param - 8} end else if param >= 20 then return {name = stairs[1], param2 = param} elseif param >= 16 then return {name = stairs[2], param2 = param + 4} else return {name = stairs[3], param2 = param + 8} end end end local stair_param_to_connect = function(param, ceiling) local out = {false, false, false, false, false, false, false, false} if not ceiling then if param == 0 then out[3] = true out[8] = true elseif param == 1 then out[2] = true out[5] = true elseif param == 2 then out[4] = true out[7] = true elseif param == 3 then out[1] = true out[6] = true elseif param == 4 then out[1] = true out[8] = true elseif param == 5 then out[2] = true out[3] = true elseif param == 6 then out[4] = true out[5] = true elseif param == 7 then out[6] = true out[7] = true elseif param == 8 then out[3] = true out[6] = true elseif param == 9 then out[5] = true out[8] = true elseif param == 10 then out[2] = true out[7] = true elseif param == 11 then out[1] = true out[4] = true end else if param == 12 then out[5] = true out[8] = true elseif param == 13 then out[3] = true out[6] = true elseif param == 14 then out[1] = true out[4] = true elseif param == 15 then out[2] = true out[7] = true elseif param == 16 then out[2] = true out[3] = true elseif param == 17 then out[1] = true out[8] = true elseif param == 18 then out[6] = true out[7] = true elseif param == 19 then out[4] = true out[5] = true elseif param == 20 then out[3] = true out[8] = true elseif param == 21 then out[1] = true out[6] = true elseif param == 22 then out[4] = true out[7] = true elseif param == 23 then out[2] = true out[5] = true end end return out end local stair_connect_to_param = function(connect, ceiling) local param if not ceiling then if connect[3] and connect[8] then param = 0 elseif connect[2] and connect[5] then param = 1 elseif connect[4] and connect[7] then param = 2 elseif connect[1] and connect[6] then param = 3 elseif connect[1] and connect[8] then param = 4 elseif connect[2] and connect[3] then param = 5 elseif connect[4] and connect[5] then param = 6 elseif connect[6] and connect[7] then param = 7 elseif connect[3] and connect[6] then param = 8 elseif connect[5] and connect[8] then param = 9 elseif connect[2] and connect[7] then param = 10 elseif connect[1] and connect[4] then param = 11 end else if connect[5] and connect[8] then param = 12 elseif connect[3] and connect[6] then param = 13 elseif connect[1] and connect[4] then param = 14 elseif connect[2] and connect[7] then param = 15 elseif connect[2] and connect[3] then param = 16 elseif connect[1] and connect[8] then param = 17 elseif connect[6] and connect[7] then param = 18 elseif connect[4] and connect[5] then param = 19 elseif connect[3] and connect[8] then param = 20 elseif connect[1] and connect[6] then param = 21 elseif connect[4] and connect[7] then param = 22 elseif connect[2] and connect[5] then param = 23 end end return param end function mcstair.add(name, stairtiles) local node_def = minetest.registered_nodes[name] local outer_tiles local inner_tiles if stairtiles then outer_tiles = stairtiles[1] inner_tiles = stairtiles[2] else outer_tiles = node_def.tiles inner_tiles = node_def.tiles end local outer_groups = table.copy(node_def.groups) outer_groups.not_in_creative_inventory = 1 local inner_groups = table.copy(outer_groups) outer_groups.stair = 2 outer_groups.not_in_craft_guide = 1 inner_groups.stair = 3 inner_groups.not_in_craft_guide = 1 local drop = node_def.drop or name local after_dig_node = function(pos, oldnode) local param = get_stair_param(oldnode) local ceiling if param < 12 then ceiling = false else ceiling = true end local connect = stair_param_to_connect(param, ceiling) local t = { {pos = {x = pos.x, y = pos.y, z = pos.z + 2}}, {pos = {x = pos.x - 1, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x - 2, y = pos.y, z = pos.z}}, {pos = {x = pos.x - 1, y = pos.y, z = pos.z}}, {pos = pos, connect = connect}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z}}, {pos = {x = pos.x + 2, y = pos.y, z = pos.z}}, {pos = {x = pos.x - 1, y = pos.y, z = pos.z - 1}}, {pos = {x = pos.x, y = pos.y, z = pos.z - 1}}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z - 1}}, {pos = {x = pos.x, y = pos.y, z = pos.z - 2}} } for i,v in ipairs(t) do if not v.connect then local node = minetest.get_node(v.pos) local node_def = minetest.registered_nodes[node.name] if node_def.stairs then t[i].stairs = node_def.stairs t[i].connect = stair_param_to_connect(get_stair_param(node), ceiling) else t[i].connect = {false, false, false, false, false, false, false, false} end end end local swap_stair = function(index, n1, n2) local connect = {false, false, false, false, false, false, false, false} connect[n1] = true connect[n2] = true local node = get_stair_from_param(stair_connect_to_param(connect, ceiling), t[index].stairs) minetest.swap_node(t[index].pos, node) end if t[3].stairs then if t[7].connect[1] and t[3].connect[6] then if t[3].connect[1] and t[1].connect[6] then if t[2].connect[3] then swap_stair(3, 1, 8) elseif t[4].connect[7] then swap_stair(3, 1, 4) end elseif t[3].connect[7] then swap_stair(3, 4, 7) elseif t[3].connect[3] then swap_stair(3, 3, 8) end elseif t[7].connect[2] and t[3].connect[5] then if t[3].connect[2] and t[1].connect[5] then if t[4].connect[8] then swap_stair(3, 2, 3) elseif t[2].connect[4] then swap_stair(3, 2, 7) end elseif t[3].connect[4] then swap_stair(3, 4, 7) elseif t[3].connect[8] then swap_stair(3, 3, 8) end end end if t[8].stairs then if t[7].connect[3] and t[8].connect[8] then if t[8].connect[3] and t[9].connect[8] then if t[4].connect[5] then swap_stair(8, 2, 3) elseif t[12].connect[1] then swap_stair(8, 3, 6) end elseif t[8].connect[1] then swap_stair(8, 1, 6) elseif t[8].connect[5] then swap_stair(8, 2, 5) end elseif t[7].connect[4] and t[8].connect[7] then if t[8].connect[4] and t[9].connect[7] then if t[12].connect[2] then swap_stair(8, 4, 5) elseif t[4].connect[6] then swap_stair(8, 1, 4) end elseif t[8].connect[6] then swap_stair(8, 1, 6) elseif t[8].connect[2] then swap_stair(8, 2, 5) end end end if t[11].stairs then if t[7].connect[5] and t[11].connect[2] then if t[11].connect[5] and t[13].connect[2] then if t[12].connect[7] then swap_stair(11, 4, 5) elseif t[10].connect[3] then swap_stair(11, 5, 8) end elseif t[11].connect[3] then swap_stair(11, 3, 8) elseif t[11].connect[7] then swap_stair(11, 4, 7) end elseif t[7].connect[6] and t[11].connect[1] then if t[11].connect[6] and t[13].connect[1] then if t[10].connect[4] then swap_stair(11, 6, 7) elseif t[12].connect[8] then swap_stair(11, 3, 6) end elseif t[11].connect[8] then swap_stair(11, 3, 8) elseif t[11].connect[4] then swap_stair(11, 4, 7) end end end if t[6].stairs then if t[7].connect[7] and t[6].connect[4] then if t[6].connect[7] and t[5].connect[4] then if t[10].connect[1] then swap_stair(6, 6, 7) elseif t[2].connect[5] then swap_stair(6, 2, 7) end elseif t[6].connect[5] then swap_stair(6, 2, 5) elseif t[6].connect[1] then swap_stair(6, 1, 6) end elseif t[7].connect[8] and t[6].connect[3] then if t[6].connect[8] and t[5].connect[3] then if t[2].connect[6] then swap_stair(6, 1, 8) elseif t[10].connect[2] then swap_stair(6, 5, 8) end elseif t[6].connect[2] then swap_stair(6, 2, 5) elseif t[6].connect[6] then swap_stair(6, 1, 6) end end end end minetest.override_item(name, { stairs = {name, name.."_outer", name.."_inner"}, after_dig_node = function(pos, oldnode) after_dig_node(pos, oldnode) end, on_place = nil, after_place_node = function(pos, placer, itemstack, pointed_thing) local node = minetest.get_node(pos) local ceiling = false if pointed_thing.under.y > pointed_thing.above.y then ceiling = true if node.param2 == 0 then node.param2 = 20 elseif node.param2 == 1 then node.param2 = 23 elseif node.param2 == 2 then node.param2 = 22 elseif node.param2 == 3 then node.param2 = 21 end end local connect = stair_param_to_connect(get_stair_param(node), ceiling) local t = { {pos = {x = pos.x - 1, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z + 1}}, {pos = {x = pos.x - 1, y = pos.y, z = pos.z}}, {pos = pos, stairs = {name, name.."_outer", name.."_inner"}, connect = connect}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z}}, {pos = {x = pos.x - 1, y = pos.y, z = pos.z - 1}}, {pos = {x = pos.x, y = pos.y, z = pos.z - 1}}, {pos = {x = pos.x + 1, y = pos.y, z = pos.z - 1}}, } for i,v in ipairs(t) do if not v.connect then local node = minetest.get_node(v.pos) local node_def = minetest.registered_nodes[node.name] if node_def.stairs then t[i].stairs = node_def.stairs t[i].connect = stair_param_to_connect(get_stair_param(node), ceiling) else t[i].connect = {false, false, false, false, false, false, false, false} end end end local reset_node = function(n1, n2) local connect = {false, false, false, false, false, false, false, false} connect[n1] = true connect[n2] = true node = get_stair_from_param(stair_connect_to_param(connect, ceiling), t[5].stairs) end local swap_stair = function(index, n1, n2) local connect = {false, false, false, false, false, false, false, false} connect[n1] = true connect[n2] = true local node = get_stair_from_param(stair_connect_to_param(connect, ceiling), t[index].stairs) t[index].connect = connect minetest.swap_node(t[index].pos, node) end if connect[3] then if t[4].connect[2] and t[4].connect[5] and t[1].connect[5] and not t[7].connect[2] then swap_stair(4, 2, 3) elseif t[4].connect[1] and t[4].connect[6] and t[7].connect[1] and not t[1].connect[6] then swap_stair(4, 3, 6) end if t[6].connect[1] and t[6].connect[6] and t[3].connect[6] and not t[9].connect[1] then swap_stair(6, 1, 8) elseif t[6].connect[2] and t[6].connect[5] and t[9].connect[2] and not t[3].connect[5] then swap_stair(6, 5, 8) end if t[4].connect[3] ~= t[6].connect[8] then if t[4].connect[3] then if t[2].connect[6] then reset_node(1, 8) elseif t[8].connect[2] then reset_node(5, 8) elseif t[2].connect[4] and t[2].connect[7] and t[1].connect[4] and not t[3].connect[7] then swap_stair(2, 6, 7) reset_node(1, 8) elseif t[2].connect[3] and t[2].connect[8] and t[3].connect[8] and not t[1].connect[3] then swap_stair(2, 3, 6) reset_node(1, 8) elseif t[8].connect[3] and t[8].connect[8] and t[9].connect[8] and not t[7].connect[3] then swap_stair(8, 2, 3) reset_node(5, 8) elseif t[8].connect[4] and t[8].connect[7] and t[7].connect[4] and not t[9].connect[7] then swap_stair(8, 2, 7) reset_node(5, 8) end else if t[2].connect[5] then reset_node(2, 3) elseif t[8].connect[1] then reset_node(3, 6) elseif t[2].connect[4] and t[2].connect[7] and t[3].connect[7] and not t[1].connect[4] then swap_stair(2, 4, 5) reset_node(2, 3) elseif t[2].connect[3] and t[2].connect[8] and t[1].connect[3] and not t[3].connect[8] then swap_stair(2, 5, 8) reset_node(2, 3) elseif t[8].connect[3] and t[8].connect[8] and t[7].connect[3] and not t[9].connect[8] then swap_stair(8, 1, 8) reset_node(3, 6) elseif t[8].connect[4] and t[8].connect[7] and t[9].connect[7] and not t[7].connect[4] then swap_stair(8, 1, 4) reset_node(3, 6) end end end elseif connect[2] then if t[2].connect[4] and t[2].connect[7] and t[3].connect[7] and not t[1].connect[4] then swap_stair(2, 4, 5) elseif t[2].connect[3] and t[2].connect[8] and t[1].connect[3] and not t[3].connect[8] then swap_stair(2, 5, 8) end if t[8].connect[3] and t[8].connect[8] and t[9].connect[8] and not t[7].connect[3] then swap_stair(8, 2, 3) elseif t[8].connect[4] and t[8].connect[7] and t[7].connect[4] and not t[9].connect[7] then swap_stair(8, 2, 7) end if t[2].connect[5] ~= t[8].connect[2] then if t[2].connect[5] then if t[6].connect[8] then reset_node(2, 3) elseif t[4].connect[4] then reset_node(2, 7) elseif t[6].connect[1] and t[6].connect[6] and t[3].connect[6] and not t[9].connect[1] then swap_stair(6, 1, 8) reset_node(2, 3) elseif t[6].connect[2] and t[6].connect[5] and t[9].connect[2] and not t[3].connect[5] then swap_stair(6, 5, 8) reset_node(2, 3) elseif t[4].connect[2] and t[4].connect[5] and t[7].connect[2] and not t[1].connect[5] then swap_stair(4, 4, 5) reset_node(2, 7) elseif t[4].connect[1] and t[4].connect[6] and t[1].connect[6] and not t[7].connect[1] then swap_stair(4, 1, 4) reset_node(2, 7) end else if t[6].connect[7] then reset_node(4, 5) elseif t[4].connect[3] then reset_node(5, 8) elseif t[6].connect[1] and t[6].connect[6] and t[9].connect[1] and not t[3].connect[6] then swap_stair(6, 6, 7) reset_node(4, 5) elseif t[6].connect[2] and t[6].connect[5] and t[3].connect[5] and not t[9].connect[2] then swap_stair(6, 2, 7) reset_node(4, 5) elseif t[4].connect[2] and t[4].connect[5] and t[1].connect[5] and not t[7].connect[2] then swap_stair(4, 2, 3) reset_node(5, 8) elseif t[4].connect[1] and t[4].connect[6] and t[7].connect[1] and not t[1].connect[6] then swap_stair(4, 3, 6) reset_node(5, 8) end end end elseif connect[4] then if t[6].connect[1] and t[6].connect[6] and t[9].connect[1] and not t[3].connect[6] then swap_stair(6, 6, 7) elseif t[6].connect[2] and t[6].connect[5] and t[3].connect[5] and not t[9].connect[2] then swap_stair(6, 2, 7) end if t[4].connect[2] and t[4].connect[5] and t[7].connect[2] and not t[1].connect[5] then swap_stair(4, 4, 5) elseif t[4].connect[1] and t[4].connect[6] and t[1].connect[6] and not t[7].connect[1] then swap_stair(4, 1, 4) end if t[4].connect[4] ~= t[6].connect[7] then if t[4].connect[4] then if t[8].connect[1] then reset_node(6, 7) elseif t[2].connect[5] then reset_node(2, 7) elseif t[8].connect[3] and t[8].connect[8] and t[7].connect[3] and not t[9].connect[8] then swap_stair(8, 1, 8) reset_node(6, 7) elseif t[8].connect[4] and t[8].connect[7] and t[9].connect[7] and not t[7].connect[4] then swap_stair(8, 1, 4) reset_node(6, 7) elseif t[2].connect[4] and t[2].connect[7] and t[3].connect[7] and not t[1].connect[4] then swap_stair(2, 4, 5) reset_node(2, 7) elseif t[2].connect[3] and t[2].connect[8] and t[1].connect[3] and not t[3].connect[8] then swap_stair(2, 5, 8) reset_node(2, 7) end else if t[8].connect[2] then reset_node(4, 5) elseif t[2].connect[6] then reset_node(1, 4) elseif t[8].connect[3] and t[8].connect[8] and t[9].connect[8] and not t[7].connect[3] then swap_stair(8, 2, 3) reset_node(4, 5) elseif t[8].connect[4] and t[8].connect[7] and t[7].connect[4] and not t[9].connect[7] then swap_stair(8, 2, 7) reset_node(4, 5) elseif t[2].connect[4] and t[2].connect[7] and t[1].connect[4] and not t[3].connect[7] then swap_stair(2, 6, 7) reset_node(1, 4) elseif t[2].connect[3] and t[2].connect[8] and t[3].connect[8] and not t[1].connect[3] then swap_stair(2, 3, 6) reset_node(1, 4) end end end elseif connect[1] then if t[8].connect[3] and t[8].connect[8] and t[7].connect[3] and not t[9].connect[8] then swap_stair(8, 1, 8) elseif t[8].connect[4] and t[8].connect[7] and t[9].connect[7] and not t[7].connect[4] then swap_stair(8, 1, 4) end if t[2].connect[4] and t[2].connect[7] and t[1].connect[4] and not t[3].connect[7] then swap_stair(2, 6, 7) elseif t[2].connect[3] and t[2].connect[8] and t[3].connect[8] and not t[1].connect[3] then swap_stair(2, 3, 6) end if t[2].connect[6] ~= t[8].connect[1] then if t[2].connect[6] then if t[4].connect[3] then reset_node(1, 8) elseif t[6].connect[7] then reset_node(1, 4) elseif t[4].connect[2] and t[4].connect[5] and t[1].connect[5] and not t[7].connect[2] then swap_stair(4, 2, 3) reset_node(1, 8) elseif t[4].connect[1] and t[4].connect[6] and t[7].connect[1] and not t[1].connect[6] then swap_stair(4, 3, 6) reset_node(1, 8) elseif t[6].connect[1] and t[6].connect[6] and t[9].connect[1] and not t[3].connect[6] then swap_stair(6, 6, 7) reset_node(1, 4) elseif t[6].connect[2] and t[6].connect[5] and t[3].connect[5] and not t[9].connect[2] then swap_stair(6, 2, 7) reset_node(1, 4) end else if t[4].connect[4] then reset_node(6, 7) elseif t[6].connect[8] then reset_node(3, 6) elseif t[4].connect[2] and t[4].connect[5] and t[7].connect[2] and not t[1].connect[5] then swap_stair(4, 4, 5) reset_node(6, 7) elseif t[4].connect[1] and t[4].connect[6] and t[1].connect[6] and not t[7].connect[1] then swap_stair(4, 1, 4) reset_node(6, 7) elseif t[6].connect[1] and t[6].connect[6] and t[3].connect[6] and not t[9].connect[1] then swap_stair(6, 1, 8) reset_node(3, 6) elseif t[6].connect[2] and t[6].connect[5] and t[9].connect[2] and not t[3].connect[5] then swap_stair(6, 5, 8) reset_node(3, 6) end end end end minetest.swap_node(pos, node) end }) minetest.register_node(":"..name.."_outer", { description = node_def.description, drawtype = "nodebox", tiles = outer_tiles, paramtype = "light", paramtype2 = "facedir", is_ground_content = false, sunlight_propagates = false, groups = outer_groups, sounds = node_def.sounds, node_box = { type = "fixed", fixed = { {-0.5, -0.5, -0.5, 0.5, 0, 0.5}, {-0.5, 0, 0, 0, 0.5, 0.5} } }, drop = drop, stairs = {name, name.."_outer", name.."_inner"}, after_dig_node = function(pos, oldnode) after_dig_node(pos, oldnode) end, _mcl_hardness = node_def._mcl_hardness, }) minetest.register_node(":"..name.."_inner", { description = node_def.description, drawtype = "nodebox", tiles = inner_tiles, paramtype = "light", paramtype2 = "facedir", is_ground_content = false, sunlight_propagates = false, groups = inner_groups, sounds = node_def.sounds, node_box = { type = "fixed", fixed = { {-0.5, -0.5, -0.5, 0.5, 0, 0.5}, {-0.5, 0, 0, 0.5, 0.5, 0.5}, {-0.5, 0, -0.5, 0, 0.5, 0} } }, drop = drop, stairs = {name, name.."_outer", name.."_inner"}, after_dig_node = function(pos, oldnode) after_dig_node(pos, oldnode) end, _mcl_hardness = node_def._mcl_hardness, }) end for _,v in ipairs({ "wood", "junglewood", "sprucewood", "acaciawood", "birchwood", "darkwood" }) do local t = minetest.registered_nodes["mcl_core:"..v].tiles[1] mcstair.add("stairs:stair_"..v, { { t.."^("..t.."^[transformR90^mcstair_turntexture.png^[makealpha:255,0,255)", t.."^("..t.."^mcstair_turntexture.png^[transformR270^[makealpha:255,0,255)", t }, { t.."^("..t.."^[transformR90^(mcstair_turntexture.png^[transformR180)^[makealpha:255,0,255)", t.."^("..t.."^[transformR270^(mcstair_turntexture.png^[transformR90)^[makealpha:255,0,255)", t } }) end for _,v in ipairs({ "cobble", "brick_block", "sandstone", "redsandstone", "stonebrick", "quartzblock", "purpur_block", "nether_brick", }) do mcstair.add("stairs:stair_"..v) end