mods/redstone/piston.lua

   1 local minetest,math,ipairs,vector,table = minetest,math,ipairs,vector,table
   2 --exclude certain mods and nodes from being pushed and pulled to stop glitches
   3 local registered_nodes
   4 minetest.register_on_mods_loaded(function()
   5         registered_nodes  = minetest.registered_nodes
   6 end)
   7
   8 local excluded_mods = {utility=true,craftingtable=true,buildtest=true,sign=true,bed=true}
   9 local excluded_nodes = {
  10         ["redstone:piston_on"]=true,
  11         ["redstone:sticky_piston_on"]=true,
  12         ["redstone:actuator"]=true,
  13         ["redstone:sticky_actuator"]=true,
  14         ["redstone:inverter_on"]=true,
  15         ["redstone:inverter_off"]=true,
  16         ["redstone:torch_wall"]=true,
  17         ["redstone:torch_floor"]=true,
  18         ["redstone:lever_on"]=true,
  19         ["redstone:lever_off"]=true,
  20         ["redstone:button_on"]=true,
  21         ["redstone:button_off"]=true,
  22 }
  23 for i = 0,8 do
  24         excluded_nodes["redstone:dust_"..i] = true
  25 end
  26 for i = 0,7 do
  27         excluded_nodes["redstone:repeater_on_"..i] = true
  28         excluded_nodes["redstone:repeater_off_"..i] = true
  29 end
  30 for i = 0,9 do
  31         excluded_nodes["redstone:comparator_"..i] = true
  32 end
  33 for i = 0,9 do
  34         excluded_nodes["redstone:pressure_plate_"..i] = true
  35 end
  36 for i = 0,1 do
  37         excluded_nodes["redstone:ore_"..i] = true
  38 end
  39
  40
  41 --[[
  42 ███████╗██╗   ██╗███╗   ██╗ ██████╗████████╗██╗ ██████╗ ███╗   ██╗
  43 ██╔════╝██║   ██║████╗  ██║██╔════╝╚══██╔══╝██║██╔═══██╗████╗  ██║
  44 █████╗  ██║   ██║██╔██╗ ██║██║        ██║   ██║██║   ██║██╔██╗ ██║
  45 ██╔══╝  ██║   ██║██║╚██╗██║██║        ██║   ██║██║   ██║██║╚██╗██║
  46 ██║     ╚██████╔╝██║ ╚████║╚██████╗   ██║   ██║╚██████╔╝██║ ╚████║
  47 ╚═╝      ╚═════╝ ╚═╝  ╚═══╝ ╚═════╝   ╚═╝   ╚═╝ ╚═════╝ ╚═╝  ╚═══╝
  48 ]]
  49
  50 --this is how the piston pushes nodes
  51 local move_index
  52 local space
  53 local index_pos
  54 local node
  55 local param2
  56 local def
  57 local push
  58 local index
  59 local function push_nodes(pos,dir)
  60         move_index = {}
  61         space = false
  62         for i = 1,30 do
  63                 index_pos = vector.add(vector.multiply(dir,i),pos)
  64                 node = minetest.get_node(index_pos)
  65                 param2 = node.param2
  66                 def = minetest.registered_nodes[node.name]
  67                 name = node.name
  68                 push = ((excluded_mods[def.mod_origin] ~= true) and (excluded_nodes[name] ~= true))
  69                 if push and name ~= "air" then
  70                         index = {}
  71                         index.pos = index_pos
  72                         index.name = name
  73                         index.param2 = param2
  74                         table.insert(move_index,index)
  75                 elseif name == "air" then
  76                         space = true
  77                         break
  78                 else
  79                         space = false
  80                         break
  81                 end
  82         end
  83
  84         --check if room to move and objects in log
  85         if space == true and next(move_index) then
  86                 if table.getn(move_index) == 1 and minetest.get_item_group(move_index[1].name, "falling_node") > 0 then
  87                         for i = 1,table.getn(move_index) do
  88                                 print("trying")
  89                                 move_index[i].pos = vector.add(move_index[i].pos,dir)
  90                                 minetest.set_node(move_index[i].pos,{name="air"})
  91
  92                                 local obj = minetest.add_entity(vector.add(move_index[i].pos,dir), "__builtin:falling_node")
  93                                 obj:get_luaentity():set_node({name=move_index[i].name})
  94                                 obj:set_velocity(vector.multiply(dir,19))
  95                         end
  96                 else
  97                         for i = 1,table.getn(move_index) do
  98                                 move_index[i].pos = vector.add(move_index[i].pos,dir)
  99                                 minetest.set_node(move_index[i].pos,move_index[i])
 100                                 minetest.check_for_falling(move_index[i].pos)
 101                         end
 102                 end
 103         end
 104         return(space)
 105 end
 106
 107 --this is the logic of the piston
 108 local facedir
 109 local dir
 110 local piston_location
 111 local worked
 112 local function actuator_arm_function(pos)
 113         --this is where the piston activates
 114         facedir = minetest.get_node(pos).param2
 115         dir = minetest.facedir_to_dir(facedir)
 116         piston_location = vector.add(pos,dir)
 117         worked = push_nodes(pos,dir)
 118         local node = minetest.get_node(vector.add(pos,dir)).name
 119
 120         if worked == true then
 121                 --push player
 122                 if node == "air" then
 123                         for _,object in ipairs(minetest.get_objects_inside_radius(piston_location, 2)) do
 124
 125                                 if object:is_player() and object:get_hp() > 0 then
 126                                         local pos2 = object:get_pos()
 127                                         local compare = vector.subtract(pos2,piston_location)
 128                                         local real_y = compare.y
 129                                         compare = vector.abs(compare)
 130                                         --piston pointing up
 131                                         if dir.y == 1 then
 132                                                 if compare.y <= 0.5 and compare.x < 0.8 and compare.z < 0.8 then
 133                                                         object:move_to(vector.add(dir,pos2))
 134                                                         object:add_player_velocity(vector.multiply(dir,20))
 135                                                 end
 136                                         --piston sideways
 137                                         elseif dir.x ~=0 or dir.z ~= 0 then
 138                                                 if real_y <= 0.5 and real_y >= -1.6 and compare.x < 0.8 and compare.z < 0.8 then
 139                                                         object:move_to(vector.add(dir,pos2))
 140                                                         object:add_player_velocity(vector.multiply(dir,19))
 141                                                 end
 142                                         end
 143                                 elseif not object:is_player() and object:get_luaentity().name == "__builtin:falling_node" then
 144                                         local pos2 = object:get_pos()
 145                                         local compare = vector.subtract(pos2,piston_location)
 146                                         local real_y = compare.y
 147                                         compare = vector.abs(compare)
 148                                         if compare.y <= 1.5 and compare.x <= 1.5 and compare.z <= 1.5 then
 149                                                 object:move_to(vector.add(dir,pos2))
 150                                                 object:add_velocity(vector.multiply(dir,20))
 151                                         end
 152                                 elseif not object:is_player() and object:get_luaentity().name == "__builtin:item" then
 153                                         local pos2 = object:get_pos()
 154                                         local compare = vector.subtract(pos2,piston_location)
 155                                         local real_y = compare.y
 156                                         compare = vector.abs(compare)
 157                                         if compare.y <= 1 and compare.x <= 1 and compare.z <= 1 then
 158                                                 object:move_to(vector.add(dir,pos2))
 159                                                 object:add_velocity(vector.multiply(dir,20))
 160                                                 object:get_luaentity().poll_timer = 0
 161                                         end
 162                                 end
 163                         end
 164                 end
 165                 minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
 166                 minetest.set_node(piston_location,{name="redstone:actuator",param2=facedir})
 167                 minetest.swap_node(pos,{name="redstone:piston_on",param2=facedir})
 168
 169                 redstone.inject(pos,{
 170                         name = "redstone:piston_on",
 171                         activator = true,
 172                 })
 173                 minetest.after(0,function()
 174                         redstone.update(pos)
 175                 end)
 176         end
 177 end
 178
 179
 180 --[[
 181  ██████╗ ███████╗███████╗
 182 ██╔═══██╗██╔════╝██╔════╝
 183 ██║   ██║█████╗  █████╗
 184 ██║   ██║██╔══╝  ██╔══╝
 185 ╚██████╔╝██║     ██║
 186  ╚═════╝ ╚═╝     ╚═╝
 187 ]]
 188
 189
 190 minetest.register_node("redstone:piston_off", {
 191     description = "Piston",
 192     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","wood.png","stone.png"},
 193     paramtype2 = "facedir",
 194     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
 195     sounds = main.stoneSound(),
 196     drop = "redstone:piston_off",
 197     paramtype = "light",
 198         sunlight_propagates = true,
 199     --reverse the direction to face the player
 200     after_place_node = function(pos, placer, itemstack, pointed_thing)
 201                 local look = placer:get_look_dir()
 202                 look = vector.multiply(look,-1)
 203                 local dir = minetest.dir_to_facedir(look, true)
 204                 minetest.swap_node(pos,{name="redstone:piston_off",param2=dir})
 205                 redstone.inject(pos,{
 206                         name = "redstone:piston_off",
 207                         activator = true,
 208                 })
 209                 redstone.update(pos)
 210         end,
 211         after_destruct = function(pos, oldnode)
 212                 redstone.inject(pos,nil)
 213     end,
 214 })
 215
 216
 217 redstone.register_activator({
 218         name = "redstone:piston_off",
 219         activate = function(pos)
 220                 actuator_arm_function(pos)
 221         end
 222 })
 223
 224 minetest.register_lbm({
 225         name = "redstone:piston_off",
 226         nodenames = {"redstone:piston_off"},
 227         run_at_every_load = true,
 228         action = function(pos)
 229                 redstone.inject(pos,{
 230                         name = "redstone:piston_off",
 231                         activator = true,
 232                 })
 233                 minetest.after(0,function()
 234                         redstone.update(pos)
 235                 end)
 236         end,
 237 })
 238
 239
 240 --[[
 241  ██████╗ ███╗   ██╗
 242 ██╔═══██╗████╗  ██║
 243 ██║   ██║██╔██╗ ██║
 244 ██║   ██║██║╚██╗██║
 245 ╚██████╔╝██║ ╚████║
 246  ╚═════╝ ╚═╝  ╚═══╝
 247 ]]
 248
 249 minetest.register_node("redstone:piston_on", {
 250     description = "Piston",
 251     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","stone.png","stone.png"},
 252     drawtype = "nodebox",
 253     paramtype = "light",
 254     paramtype2 = "facedir",
 255     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
 256     sounds = main.stoneSound(),
 257     drop = "redstone:piston_off",
 258     node_box = {
 259                 type = "fixed",
 260                 fixed = {
 261                                 --left front bottom right back top
 262                                 {-0.5, -0.5,  -0.5, 0.5,  0.5, 3/16},
 263                         },
 264                 },
 265     after_destruct = function(pos, oldnode)
 266                 local facedir = oldnode.param2
 267                 local dir = minetest.facedir_to_dir(facedir)
 268                 local piston_location = vector.add(pos,dir)
 269                 minetest.remove_node(piston_location)
 270                 redstone.inject(pos,nil)
 271     end,
 272 })
 273
 274 minetest.register_lbm({
 275         name = "redstone:piston_on",
 276         nodenames = {"redstone:piston_on"},
 277         run_at_every_load = true,
 278         action = function(pos)
 279                 redstone.inject(pos,{
 280                         name = "redstone:piston_on",
 281                         activator = true,
 282                 })
 283                 minetest.after(0,function()
 284                         redstone.update(pos)
 285                 end)
 286         end,
 287 })
 288
 289 redstone.register_activator({
 290         name = "redstone:piston_on",
 291         deactivate = function(pos)
 292                 --this is where the piston deactivates
 293                 local facedir = minetest.get_node(pos).param2
 294                 local dir = minetest.facedir_to_dir(facedir)
 295                 local piston_location = vector.add(pos,dir)
 296                 minetest.remove_node(piston_location)
 297                 minetest.swap_node(pos,{name="redstone:piston_off",param2=facedir})
 298                 piston_location.y = piston_location.y + 1
 299                 minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
 300                 redstone.inject(pos,{
 301                         name = "redstone:piston_off",
 302                         activator = true,
 303                 })
 304         end
 305 })
 306
 307
 308 --[[
 309  █████╗ ██████╗ ███╗   ███╗
 310 ██╔══██╗██╔══██╗████╗ ████║
 311 ███████║██████╔╝██╔████╔██║
 312 ██╔══██║██╔══██╗██║╚██╔╝██║
 313 ██║  ██║██║  ██║██║ ╚═╝ ██║
 314 ╚═╝  ╚═╝╚═╝  ╚═╝╚═╝     ╚═╝
 315 ]]
 316
 317
 318
 319 minetest.register_node("redstone:actuator", {
 320     description = "Piston Actuator",
 321     tiles = {"wood.png"},
 322     drawtype = "nodebox",
 323     paramtype = "light",
 324     paramtype2 = "facedir",
 325     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1},
 326     sounds = main.stoneSound(),
 327     drop = "redstone:piston_off",
 328     node_box = {
 329                 type = "fixed",
 330                 fixed = {
 331                                 --left front bottom right back top
 332                                 {-0.5, -0.5,  0.2, 0.5,  0.5, 0.5}, --mover
 333                                 {-0.15, -0.15,  -0.9, 0.15,  0.15, 0.5}, --actuator
 334                         },
 335                 },
 336         after_destruct = function(pos, oldnode)
 337                 local facedir = oldnode.param2
 338                 local dir = minetest.facedir_to_dir(facedir)
 339                 dir = vector.multiply(dir,-1)
 340                 local piston_location = vector.add(pos,dir)
 341                 minetest.remove_node(piston_location)
 342     end,
 343 })
 344
 345 --[[
 346 -------------------------------------------------------------------------------------------------------------------------------------------------------
 347 --this is how the piston pushes nodes
 348 local function sticky_piston_push_nodes(pos,dir)
 349         local move_index = {}
 350         local space = false
 351         for i = 1,30 do
 352                 local index_pos = vector.multiply(dir,i)
 353                 local index_pos = vector.add(index_pos,pos)
 354                 local node = minetest.get_node(index_pos)
 355                 local param2 = node.param2
 356                 local def = minetest.registered_nodes[node.name]
 357                 local name = node.name
 358                 local push = ((excluded_mods[def.mod_origin] ~= true) and (excluded_nodes[name] ~= true))
 359                 if push and name ~= "air" then
 360                         local index = {}
 361                         index.pos = index_pos
 362                         index.name = name
 363                         index.param2 = param2
 364                         table.insert(move_index,index)
 365                 elseif name == "air" then
 366                         space = true
 367                         break
 368                 else
 369                         space = false
 370                         break
 371                 end
 372         end
 373         --check if room to move and objects in log
 374         if space == true and next(move_index) then
 375                 for i = 1,table.getn(move_index) do
 376                         move_index[i].pos = vector.add(move_index[i].pos,dir)
 377                         minetest.set_node(move_index[i].pos,{name=move_index[i].name,param2=move_index[i].param2})
 378                 end
 379         end
 380         return(space)
 381 end
 382
 383 --this is the logic of the piston
 384 local function sticky_piston_push(pos)
 385         --this is where the piston activates
 386         local facedir = minetest.get_node(pos).param2
 387         local dir = minetest.facedir_to_dir(facedir)
 388         local piston_location = vector.add(pos,dir)
 389         local worked = sticky_piston_push_nodes(pos,dir)
 390         local node = minetest.get_node(vector.add(pos,dir)).name
 391         if worked == true then
 392                 --push player
 393                 if node == "air" then
 394                         for _,object in ipairs(minetest.get_objects_inside_radius(piston_location, 2)) do
 395                                 if object:is_player() and object:get_hp() > 0 then
 396                                         local pos2 = object:get_pos()
 397                                         local compare = vector.subtract(pos2,piston_location)
 398                                         local real_y = compare.y
 399                                         compare = vector.abs(compare)
 400                                         --piston pointing up
 401                                         if dir.y == 1 then
 402                                                 if compare.y <= 0.5 and compare.x < 0.8 and compare.z < 0.8 then
 403                                                         object:move_to(vector.add(dir,pos2))
 404                                                         --object:add_player_velocity(vector.multiply(dir,20))
 405                                                 end
 406                                         --piston sideways
 407                                         elseif dir.x ~=0 or dir.z ~= 0 then
 408                                                 if real_y <= 0.5 and real_y >= -1.6 and compare.x < 0.8 and compare.z < 0.8 then
 409                                                         object:move_to(vector.add(dir,pos2))
 410                                                         --object:add_player_velocity(vector.multiply(dir,20))
 411
 412                                                 end
 413                                         end
 414                                 end
 415                         end
 416                 end
 417                 minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
 418                 minetest.set_node(piston_location,{name="redstone:sticky_actuator",param2=facedir})
 419                 minetest.set_node(pos,{name="redstone:sticky_piston_on",param2=facedir})
 420         end
 421 end
 422
 423
 424
 425 --this is how sticky pistons pull nodes
 426 local function sticky_piston_pull_nodes(pos,dir)
 427
 428         local move_index = {}
 429         local index_pos = vector.add(pos,dir)
 430
 431         local node = minetest.get_node(index_pos)
 432         local param2 = node.param2
 433         local def = minetest.registered_nodes[node.name]
 434         local name = node.name
 435         local pull = ((excluded_mods[def.mod_origin] ~= true) and (excluded_nodes[name] ~= true))
 436         --if it can be pulled pull it
 437         if pull and name ~= "air" then
 438                 minetest.remove_node(index_pos)
 439                 minetest.set_node(pos,{name=name,param2=param2})
 440         end
 441 end
 442
 443 ------------------------------[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
 444
 445 --this is the logic of the sticky piston on return
 446 local function sticky_piston_pull(pos,dir)
 447         --this is where the piston activates
 448         --local facedir = minetest.get_node(pos).param2
 449         --local dir = minetest.facedir_to_dir(facedir)
 450         --local piston_location = vector.add(pos,dir)
 451
 452         local in_front_pos = vector.add(pos,dir)
 453
 454         local node = minetest.get_node(in_front_pos).name
 455         --pull nodes
 456         sticky_piston_pull_nodes(pos,dir)
 457
 458         --pull player
 459         if node == "air" then
 460                 for _,object in ipairs(minetest.get_objects_inside_radius(in_front_pos, 2)) do
 461                         if object:is_player() and object:get_hp() > 0 then
 462                                 local pos2 = object:get_pos()
 463                                 local compare = vector.subtract(pos2,in_front_pos)
 464                                 local real_y = compare.y
 465                                 compare = vector.abs(compare)
 466                                 --piston pointing up
 467                                 if dir.y == 1 then
 468                                         if compare.y <= 0.5 and compare.x < 0.8 and compare.z < 0.8 then
 469                                                 dir = vector.multiply(dir,-1)
 470                                                 object:move_to(vector.add(dir,pos2))
 471                                                 --object:add_player_velocity(vector.multiply(dir,20))
 472                                         end
 473                                 --piston sideways
 474                                 elseif dir.x ~=0 or dir.z ~= 0 then
 475                                         if real_y <= 0.5 and real_y >= -1.6 and compare.x < 0.8 and compare.z < 0.8 then
 476                                                 dir = vector.multiply(dir,-1)
 477                                                 object:move_to(vector.add(dir,pos2))
 478                                                 --object:add_player_velocity(vector.multiply(dir,20))
 479
 480                                         end
 481                                 end
 482                         end
 483                 end
 484         end
 485         minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
 486         --minetest.set_node(piston_location,{name="redstone:sticky_actuator",param2=facedir})
 487         --minetest.set_node(pos,{name="redstone:sticky_piston_on",param2=facedir})
 488 end
 489
 490 ------------------------------[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[
 491
 492 minetest.register_node("redstone:sticky_piston_off", {
 493     description = "Sticky Piston",
 494     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","sticky_piston.png","stone.png"},
 495     paramtype2 = "facedir",
 496     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
 497     sounds = main.stoneSound(),
 498     drop = "redstone:sticky_piston_off",
 499     paramtype = "light",
 500     sunlight_propagates = true,
 501     redstone_activation = function(pos)
 502                 if minetest.get_node(pos).name == "redstone:sticky_piston_off" then
 503                         sticky_piston_push(pos)
 504                 end
 505     end,
 506     --reverse the direction to face the player
 507     after_place_node = function(pos, placer, itemstack, pointed_thing)
 508                 local look = placer:get_look_dir()
 509                 look = vector.multiply(look,-1)
 510                 local dir = minetest.dir_to_facedir(look, true)
 511                 minetest.set_node(pos,{name="redstone:sticky_piston_off",param2=dir})
 512                 redstone.collect_info(pos)
 513     end,
 514 })
 515
 516
 517 --------------------------
 518
 519
 520 minetest.register_node("redstone:sticky_piston_on", {
 521     description = "Sticky Piston",
 522     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","stone.png","stone.png"},
 523     drawtype = "nodebox",
 524     paramtype = "light",
 525     paramtype2 = "facedir",
 526     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
 527     sounds = main.stoneSound(),
 528     drop = "redstone:sticky_piston_off",
 529     node_box = {
 530                 type = "fixed",
 531                 fixed = {
 532                                 --left front bottom right back top
 533                                 {-0.5, -0.5,  -0.5, 0.5,  0.5, 3/16},
 534                         },
 535                 },
 536     redstone_deactivation = function(pos)
 537                 --this is where the piston deactivates
 538                 local facedir = minetest.get_node(pos).param2
 539                 local dir = minetest.facedir_to_dir(facedir)
 540                 local piston_location = vector.add(pos,dir)
 541                 minetest.remove_node(piston_location)
 542                 minetest.set_node(pos,{name="redstone:sticky_piston_off",param2=facedir})
 543
 544                 sticky_piston_pull(piston_location,dir)
 545
 546                 piston_location.y = piston_location.y + 1
 547                 minetest.punch_node(piston_location)
 548                 --minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
 549     end,
 550     after_dig_node = function(pos, oldnode, oldmetadata, digger)
 551                 local facedir = oldnode.param2
 552                 local dir = minetest.facedir_to_dir(facedir)
 553                 local piston_location = vector.add(pos,dir)
 554                 minetest.remove_node(piston_location)
 555     end,
 556 })
 557
 558 minetest.register_node("redstone:sticky_actuator", {
 559     description = "Redstone Piston",
 560     tiles = {"wood.png","wood.png","wood.png","wood.png","sticky_piston.png","wood.png"},
 561     drawtype = "nodebox",
 562     paramtype = "light",
 563     paramtype2 = "facedir",
 564     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1},
 565     sounds = main.stoneSound(),
 566     drop = "redstone:sticky_piston_off",
 567     node_box = {
 568                 type = "fixed",
 569                 fixed = {
 570                                 --left front bottom right back top
 571                                 {-0.5, -0.5,  0.2, 0.5,  0.5, 0.5}, --mover
 572                                 {-0.15, -0.15,  -0.9, 0.15,  0.15, 0.5}, --actuator
 573                         },
 574                 },
 575         after_dig_node = function(pos, oldnode, oldmetadata, digger)
 576                 local facedir = oldnode.param2
 577                 local dir = minetest.facedir_to_dir(facedir)
 578                 dir = vector.multiply(dir,-1)
 579                 local piston_location = vector.add(pos,dir)
 580                 minetest.remove_node(piston_location)
 581     end,
 582 })
 583 ]]--
 584