mods/default/functions.lua

   1 -- mods/default/functions.lua
   2
   3 --
   4 -- Sounds
   5 --
   6
   7 function default.node_sound_defaults(table)
   8         table = table or {}
   9         table.footstep = table.footstep or
  10                         {name="", gain=1.0}
  11         table.dug = table.dug or
  12                         {name="default_dug_node", gain=0.25}
  13         table.place = table.place or
  14                         {name="default_place_node_hard", gain=1.0}
  15         return table
  16 end
  17
  18 function default.node_sound_stone_defaults(table)
  19         table = table or {}
  20         table.footstep = table.footstep or
  21                         {name="default_hard_footstep", gain=0.5}
  22         table.dug = table.dug or
  23                         {name="default_hard_footstep", gain=1.0}
  24         default.node_sound_defaults(table)
  25         return table
  26 end
  27
  28 function default.node_sound_dirt_defaults(table)
  29         table = table or {}
  30         table.footstep = table.footstep or
  31                         {name="default_dirt_footstep", gain=1.0}
  32         table.dug = table.dug or
  33                         {name="default_dirt_footstep", gain=1.5}
  34         table.place = table.place or
  35                         {name="default_place_node", gain=1.0}
  36         default.node_sound_defaults(table)
  37         return table
  38 end
  39
  40 function default.node_sound_sand_defaults(table)
  41         table = table or {}
  42         table.footstep = table.footstep or
  43                         {name="default_sand_footstep", gain=0.5}
  44         table.dug = table.dug or
  45                         {name="default_sand_footstep", gain=1.0}
  46         table.place = table.place or
  47                         {name="default_place_node", gain=1.0}
  48         default.node_sound_defaults(table)
  49         return table
  50 end
  51
  52 function default.node_sound_wood_defaults(table)
  53         table = table or {}
  54         table.footstep = table.footstep or
  55                         {name="default_wood_footstep", gain=0.5}
  56         table.dug = table.dug or
  57                         {name="default_wood_footstep", gain=1.0}
  58         default.node_sound_defaults(table)
  59         return table
  60 end
  61
  62 function default.node_sound_leaves_defaults(table)
  63         table = table or {}
  64         table.footstep = table.footstep or
  65                         {name="default_grass_footstep", gain=0.35}
  66         table.dug = table.dug or
  67                         {name="default_grass_footstep", gain=0.85}
  68         table.dig = table.dig or
  69                         {name="default_dig_crumbly", gain=0.4}
  70         table.place = table.place or
  71                         {name="default_place_node", gain=1.0}
  72         default.node_sound_defaults(table)
  73         return table
  74 end
  75
  76 function default.node_sound_glass_defaults(table)
  77         table = table or {}
  78         table.footstep = table.footstep or
  79                         {name="default_glass_footstep", gain=0.5}
  80         table.dug = table.dug or
  81                         {name="default_break_glass", gain=1.0}
  82         default.node_sound_defaults(table)
  83         return table
  84 end
  85
  86 --
  87 -- Legacy
  88 --
  89
  90 function default.spawn_falling_node(p, nodename)
  91         spawn_falling_node(p, nodename)
  92 end
  93
  94 -- Horrible crap to support old code
  95 -- Don't use this and never do what this does, it's completely wrong!
  96 -- (More specifically, the client and the C++ code doesn't get the group)
  97 function default.register_falling_node(nodename, texture)
  98         minetest.log("error", debug.traceback())
  99         minetest.log('error', "WARNING: default.register_falling_node is deprecated")
 100         if minetest.registered_nodes[nodename] then
 101                 minetest.registered_nodes[nodename].groups.falling_node = 1
 102         end
 103 end
 104
 105 --
 106 -- Global callbacks
 107 --
 108
 109 -- Global environment step function
 110 function on_step(dtime)
 111         -- print("on_step")
 112 end
 113 minetest.register_globalstep(on_step)
 114
 115 function on_placenode(p, node)
 116         --print("on_placenode")
 117 end
 118 minetest.register_on_placenode(on_placenode)
 119
 120 function on_dignode(p, node)
 121         --print("on_dignode")
 122 end
 123 minetest.register_on_dignode(on_dignode)
 124
 125 function on_punchnode(p, node)
 126 end
 127 minetest.register_on_punchnode(on_punchnode)
 128
 129 --
 130 -- Lavacooling
 131 --
 132
 133 default.cool_lava_source = function(pos)
 134         minetest.set_node(pos, {name="default:obsidian"})
 135 end
 136
 137 default.cool_lava_flowing = function(pos)
 138         minetest.set_node(pos, {name="default:stone"})
 139 end
 140
 141 minetest.register_abm({
 142         nodenames = {"default:lava_flowing"},
 143         neighbors = {"group:water"},
 144         interval = 1,
 145         chance = 1,
 146         action = function(pos, node, active_object_count, active_object_count_wider)
 147                 default.cool_lava_flowing(pos, node, active_object_count, active_object_count_wider)
 148         end,
 149 })
 150
 151 minetest.register_abm({
 152         nodenames = {"default:lava_source"},
 153         neighbors = {"group:water"},
 154         interval = 1,
 155         chance = 1,
 156         action = function(pos, node, active_object_count, active_object_count_wider)
 157                 default.cool_lava_source(pos, node, active_object_count, active_object_count_wider)
 158         end,
 159 })
 160
 161 --
 162 -- Papyrus and cactus growing
 163 --
 164
 165 minetest.register_abm({
 166         nodenames = {"default:cactus"},
 167         neighbors = {"group:sand"},
 168         interval = 50,
 169         chance = 20,
 170         action = function(pos, node)
 171                 pos.y = pos.y-1
 172                 local name = minetest.get_node(pos).name
 173                 if minetest.get_item_group(name, "sand") ~= 0 then
 174                         pos.y = pos.y+1
 175                         local height = 0
 176                         while minetest.get_node(pos).name == "default:cactus" and height < 4 do
 177                                 height = height+1
 178                                 pos.y = pos.y+1
 179                         end
 180                         if height < 4 then
 181                                 if minetest.get_node(pos).name == "air" then
 182                                         minetest.set_node(pos, {name="default:cactus"})
 183                                 end
 184                         end
 185                 end
 186         end,
 187 })
 188
 189 minetest.register_abm({
 190         nodenames = {"default:papyrus"},
 191         neighbors = {"default:dirt", "default:dirt_with_grass"},
 192         interval = 50,
 193         chance = 20,
 194         action = function(pos, node)
 195                 pos.y = pos.y-1
 196                 local name = minetest.get_node(pos).name
 197                 if name == "default:dirt" or name == "default:dirt_with_grass" then
 198                         if minetest.find_node_near(pos, 3, {"group:water"}) == nil then
 199                                 return
 200                         end
 201                         pos.y = pos.y+1
 202                         local height = 0
 203                         while minetest.get_node(pos).name == "default:papyrus" and height < 4 do
 204                                 height = height+1
 205                                 pos.y = pos.y+1
 206                         end
 207                         if height < 4 then
 208                                 if minetest.get_node(pos).name == "air" then
 209                                         minetest.set_node(pos, {name="default:papyrus"})
 210                                 end
 211                         end
 212                 end
 213         end,
 214 })
 215
 216 --
 217 -- Leafdecay
 218 --
 219
 220 -- To enable leaf decay for a node, add it to the "leafdecay" group.
 221 --
 222 -- The rating of the group determines how far from a node in the group "tree"
 223 -- the node can be without decaying.
 224 --
 225 -- If param2 of the node is ~= 0, the node will always be preserved. Thus, if
 226 -- the player places a node of that kind, you will want to set param2=1 or so.
 227 --
 228 -- If the node is in the leafdecay_drop group then the it will always be dropped
 229 -- as an item
 230
 231 default.leafdecay_trunk_cache = {}
 232 default.leafdecay_enable_cache = true
 233 -- Spread the load of finding trunks
 234 default.leafdecay_trunk_find_allow_accumulator = 0
 235
 236 minetest.register_globalstep(function(dtime)
 237         local finds_per_second = 5000
 238         default.leafdecay_trunk_find_allow_accumulator =
 239                         math.floor(dtime * finds_per_second)
 240 end)
 241
 242 minetest.register_abm({
 243         nodenames = {"group:leafdecay"},
 244         neighbors = {"air", "group:liquid"},
 245         -- A low interval and a high inverse chance spreads the load
 246         interval = 2,
 247         chance = 5,
 248
 249         action = function(p0, node, _, _)
 250                 --print("leafdecay ABM at "..p0.x..", "..p0.y..", "..p0.z..")")
 251                 local do_preserve = false
 252                 local d = minetest.registered_nodes[node.name].groups.leafdecay
 253                 if not d or d == 0 then
 254                         --print("not groups.leafdecay")
 255                         return
 256                 end
 257                 local n0 = minetest.get_node(p0)
 258                 if n0.param2 ~= 0 then
 259                         --print("param2 ~= 0")
 260                         return
 261                 end
 262                 local p0_hash = nil
 263                 if default.leafdecay_enable_cache then
 264                         p0_hash = minetest.hash_node_position(p0)
 265                         local trunkp = default.leafdecay_trunk_cache[p0_hash]
 266                         if trunkp then
 267                                 local n = minetest.get_node(trunkp)
 268                                 local reg = minetest.registered_nodes[n.name]
 269                                 -- Assume ignore is a trunk, to make the thing work at the border of the active area
 270                                 if n.name == "ignore" or (reg and reg.groups.tree and reg.groups.tree ~= 0) then
 271                                         --print("cached trunk still exists")
 272                                         return
 273                                 end
 274                                 --print("cached trunk is invalid")
 275                                 -- Cache is invalid
 276                                 table.remove(default.leafdecay_trunk_cache, p0_hash)
 277                         end
 278                 end
 279                 if default.leafdecay_trunk_find_allow_accumulator <= 0 then
 280                         return
 281                 end
 282                 default.leafdecay_trunk_find_allow_accumulator =
 283                                 default.leafdecay_trunk_find_allow_accumulator - 1
 284                 -- Assume ignore is a trunk, to make the thing work at the border of the active area
 285                 local p1 = minetest.find_node_near(p0, d, {"ignore", "group:tree"})
 286                 if p1 then
 287                         do_preserve = true
 288                         if default.leafdecay_enable_cache then
 289                                 --print("caching trunk")
 290                                 -- Cache the trunk
 291                                 default.leafdecay_trunk_cache[p0_hash] = p1
 292                         end
 293                 end
 294                 if not do_preserve then
 295                         -- Drop stuff other than the node itself
 296                         itemstacks = minetest.get_node_drops(n0.name)
 297                         for _, itemname in ipairs(itemstacks) do
 298                                 if minetest.get_item_group(n0.name, "leafdecay_drop") ~= 0 or
 299                                                 itemname ~= n0.name then
 300                                         local p_drop = {
 301                                                 x = p0.x - 0.5 + math.random(),
 302                                                 y = p0.y - 0.5 + math.random(),
 303                                                 z = p0.z - 0.5 + math.random(),
 304                                         }
 305                                         minetest.add_item(p_drop, itemname)
 306                                 end
 307                         end
 308                         -- Remove node
 309                         minetest.remove_node(p0)
 310                         nodeupdate(p0)
 311                 end
 312         end
 313 })