mods/redstone/piston.lua

   1 --only allow pistons to move "main" nodes
   2 local function piston_move(pos,dir)
   3         local move_index = {}
   4         local space = false
   5         for i = 1,30 do
   6                 local index_pos = vector.multiply(dir,i)
   7                 local index_pos = vector.add(index_pos,pos)
   8                 local node = minetest.get_node(index_pos)
   9                 local def = minetest.registered_nodes[node.name]
  10                 local name = node.name
  11                 if def.drawtype == "normal" and string.match(name, "main:") then
  12                         local index = {}
  13                         index.pos = index_pos
  14                         index.name = name
  15                         table.insert(move_index,index)
  16                 elseif name == "air" then
  17                         space = true
  18                         break
  19                 else
  20                         space = false
  21                         break
  22                 end
  23         end
  24         --check if room to move and objects in log
  25         if space == true and next(move_index) then
  26                 for i = 1,table.getn(move_index) do
  27                         move_index[i].pos = vector.add(move_index[i].pos,dir)
  28                         minetest.set_node(move_index[i].pos,{name=move_index[i].name})
  29                 end
  30         end
  31         return(space)
  32 end
  33
  34 minetest.register_node("redstone:piston_off", {
  35     description = "Redstone Piston",
  36     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","wood.png","stone.png"},
  37     paramtype2 = "facedir",
  38     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
  39     sounds = main.stoneSound(),
  40     drop = "redstone:piston_off",
  41     paramtype = "light",
  42     sunlight_propagates = true,
  43     redstone_activation = function(pos)
  44                 --this is where the piston activates
  45                 local facedir = minetest.get_node(pos).param2
  46                 local dir = minetest.facedir_to_dir(facedir)
  47                 local piston_location = vector.add(pos,dir)
  48                 local worked = piston_move(pos,dir)
  49                 if worked == true then
  50                         --push player
  51                         for _,object in ipairs(minetest.get_objects_inside_radius(piston_location, 1.5)) do
  52                                 if object:is_player() and object:get_hp() > 0 then
  53                                         --print("adding player velocity")
  54                                         object:add_player_velocity(vector.multiply(dir,15))
  55                                 end
  56                         end
  57                         minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
  58                         minetest.set_node(piston_location,{name="redstone:actuator",param2=facedir})
  59                         minetest.set_node(pos,{name="redstone:piston_on",param2=facedir})
  60                 end
  61     end,
  62     --reverse the direction to face the player
  63     after_place_node = function(pos, placer, itemstack, pointed_thing)
  64                 local look = placer:get_look_dir()
  65                 look = vector.multiply(look,-1)
  66                 dir = minetest.dir_to_facedir(look, true)
  67                 minetest.set_node(pos,{name="redstone:piston_off",param2=dir})
  68                 redstone.collect_info(pos)
  69     end,
  70 })
  71 minetest.register_node("redstone:piston_on", {
  72     description = "Redstone Piston",
  73     tiles = {"redstone_piston.png","redstone_piston.png^[transformR180","redstone_piston.png^[transformR270","redstone_piston.png^[transformR90","stone.png","stone.png"},
  74     drawtype = "nodebox",
  75     paramtype = "light",
  76     paramtype2 = "facedir",
  77     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1,redstone_activation=1},
  78     sounds = main.stoneSound(),
  79     drop = "redstone:piston_off",
  80     node_box = {
  81                 type = "fixed",
  82                 fixed = {
  83                                 --left front bottom right back top
  84                                 {-0.5, -0.5,  -0.5, 0.5,  0.5, 3/16},
  85                         },
  86                 },
  87     redstone_deactivation = function(pos)
  88                 --this is where the piston deactivates
  89                 local facedir = minetest.get_node(pos).param2
  90                 local dir = minetest.facedir_to_dir(facedir)
  91                 local piston_location = vector.add(pos,dir)
  92                 minetest.remove_node(piston_location)
  93                 minetest.set_node(pos,{name="redstone:piston_off",param2=facedir})
  94                 piston_location.y = piston_location.y + 1
  95                 minetest.punch_node(piston_location)
  96                 minetest.sound_play("piston", {pos=pos,pitch=math.random(85,100)/100})
  97     end,
  98     after_dig_node = function(pos, oldnode, oldmetadata, digger)
  99                 local facedir = oldnode.param2
 100                 local dir = minetest.facedir_to_dir(facedir)
 101                 local piston_location = vector.add(pos,dir)
 102                 minetest.remove_node(piston_location)
 103     end,
 104 })
 105
 106 minetest.register_node("redstone:actuator", {
 107     description = "Redstone Piston",
 108     tiles = {"wood.png"},
 109     drawtype = "nodebox",
 110     paramtype = "light",
 111     paramtype2 = "facedir",
 112     groups = {stone = 1, hard = 1, pickaxe = 1, hand = 4,pathable = 1},
 113     sounds = main.stoneSound(),
 114     drop = "redstone:piston_off",
 115     node_box = {
 116                 type = "fixed",
 117                 fixed = {
 118                                 --left front bottom right back top
 119                                 {-0.5, -0.5,  0.2, 0.5,  0.5, 0.5}, --mover
 120                                 {-0.15, -0.15,  -0.9, 0.15,  0.15, 0.5}, --actuator
 121                         },
 122                 },
 123         after_dig_node = function(pos, oldnode, oldmetadata, digger)
 124                 local facedir = oldnode.param2
 125                 local dir = minetest.facedir_to_dir(facedir)
 126                 dir = vector.multiply(dir,-1)
 127                 local piston_location = vector.add(pos,dir)
 128                 minetest.remove_node(piston_location)
 129     end,
 130 })
 131
 132