mods/minecart/init.lua

   1 local pool = {}
   2
   3 local dirs = {
   4         {x= 1,y= 0,z= 0},
   5         {x=-1,y= 0,z= 0},
   6
   7         {x= 1,y= 1,z= 0},
   8         {x=-1,y= 1,z= 0},
   9
  10         {x= 1,y=-1,z= 0},
  11         {x=-1,y=-1,z= 0},
  12
  13         {x= 0,y= 0,z= 1},
  14         {x= 0,y= 0,z=-1},
  15
  16         {x= 0,y= 1,z= 1},
  17         {x= 0,y= 1,z=-1},
  18
  19         {x= 0,y=-1,z= 1},
  20         {x= 0,y=-1,z=-1},
  21 }
  22
  23 local axis_order = {
  24
  25 }
  26 local function data_injection(pos,data)
  27         if data then
  28                 pool[minetest.hash_node_position(pos)] = true
  29         else
  30                 pool[minetest.hash_node_position(pos)] = nil
  31         end
  32 end
  33
  34
  35 local function create_axis(pos)
  36         local possible_dirs = {}
  37         for _,dir in pairs(dirs) do
  38                 local pos2 = vector.add(pos,dir)
  39                 if pool[minetest.hash_node_position(pos2)] then
  40                         table.insert(possible_dirs,dir)
  41                 end
  42         end
  43         return(possible_dirs)
  44 end
  45
  46 local function collision_detect(self)
  47         if not self.axis_lock then return end
  48         local pos = self.object:get_pos()
  49
  50         for _,object in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
  51                 if object:is_player() then
  52                         local pos2 = object:get_pos()
  53                         if self.axis_lock == "x" then
  54                                 local velocity = 1-vector.distance(vector.new(pos.x,0,0),vector.new(pos2.x,0,0))
  55                                 print(velocity)
  56                                 local dir = vector.direction(vector.new(pos2.x,0,0),vector.new(pos.x,0,0))
  57                                 self.object:add_velocity(vector.multiply(dir,velocity))
  58                                 self.dir = dir
  59                         elseif self.axis_lock == "z" then
  60                                 local velocity = 1-vector.distance(vector.new(0,0,pos.z),vector.new(0,0,pos2.z))
  61                                 local dir = vector.direction(vector.new(0,0,pos2.z),vector.new(0,0,pos.z))
  62                                 self.object:add_velocity(vector.multiply(dir,velocity))
  63                                 self.dir = dir
  64                         end
  65                         return
  66                 end
  67         end
  68 end
  69
  70
  71
  72 local function rail_brain(self,pos)
  73         if not self.dir then return end
  74
  75         --if self.dir then print(dump(self.dir)) end
  76
  77         local pos2 = self.object:get_pos()
  78
  79         local dir = self.dir
  80
  81         local triggered = false
  82
  83         if dir.x < 0 and pos2.x < pos.x then
  84                 triggered = true
  85         elseif dir.x > 0 and pos2.x > pos.x then
  86                 triggered = true
  87         elseif dir.z < 0 and pos2.z < pos.z then
  88                 triggered = true
  89         elseif dir.z > 0 and pos2.z > pos.z then
  90                 triggered = true
  91         end
  92
  93         if triggered and not pool[minetest.hash_node_position(vector.add(pos,dir))] then
  94                 local possible_dirs = create_axis(pos)
  95                 if table.getn(possible_dirs) == 0 then
  96                         --stop slow down become physical, something
  97                 else
  98                         for _,dir2 in pairs(possible_dirs) do
  99                                 if dir.x ~= 0 and dir2.z ~= 0 then
 100                                         local transmitted = self.object:get_velocity().x
 101                                         self.object:set_velocity(vector.new(0,0,transmitted))
 102                                         self.dir = vector.direction(vector.new(0,0,transmitted),vector.new(0,0,0))
 103                                 elseif dir.z ~= 0 and dir2.x ~= 0 then
 104                                         local transmitted = self.object:get_velocity().z
 105                                         self.object:set_velocity(vector.new(transmitted,0,0))
 106                                         self.dir = vector.direction(vector.new(transmitted,0,0),vector.new(0,0,0))
 107                                 end
 108                         end
 109                 end
 110         end
 111 end
 112
 113
 114
 115
 116 local minecart = {}
 117
 118 minecart.on_step = function(self,dtime)
 119         local pos = vector.round(self.object:get_pos())
 120         if not self.axis_lock then
 121                 local possible_dirs = create_axis(pos)
 122                 for _,dir in pairs(possible_dirs) do
 123                         if dir.x ~=0 then
 124                                 self.axis_lock = "x"
 125                                 break
 126                         elseif dir.z ~= 0 then
 127                                 self.axis_lock = "z"
 128                                 break
 129                         end
 130                 end
 131         else
 132                 collision_detect(self)
 133                 rail_brain(self,pos)
 134         end
 135 end
 136
 137 minecart.on_rightclick = function(self,clicker)
 138 end
 139
 140 --get old data
 141 minecart.on_activate = function(self,staticdata, dtime_s)
 142         self.object:set_armor_groups({immortal=1})
 143         if string.sub(staticdata, 1, string.len("return")) ~= "return" then
 144                 return
 145         end
 146         local data = minetest.deserialize(staticdata)
 147         if type(data) ~= "table" then
 148                 return
 149         end
 150
 151 end
 152
 153 minecart.get_staticdata = function(self)
 154         return minetest.serialize({
 155         })
 156 end
 157
 158
 159
 160 minecart.initial_properties = {
 161         physical = false, -- otherwise going uphill breaks
 162         collisionbox = {-0.4, -0.5, -0.4, 0.4, 0.45, 0.4},--{-0.5, -0.4, -0.5, 0.5, 0.25, 0.5},
 163         visual = "mesh",
 164         mesh = "minecart.x",
 165         visual_size = {x=1, y=1},
 166         textures = {"minecart.png"},
 167 }
 168
 169
 170 minecart.on_punch = function(self,puncher, time_from_last_punch, tool_capabilities, dir, damage)
 171         --local obj = minetest.add_item(self.object:getpos(), "minecart:minecart")
 172         --self.object:remove()
 173 end
 174
 175
 176
 177 minetest.register_entity("minecart:minecart", minecart)
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190 minetest.register_craftitem("minecart:minecart", {
 191         description = "Minecart",
 192         inventory_image = "minecartitem.png",
 193         wield_image = "minecartitem.png",
 194         on_place = function(itemstack, placer, pointed_thing)
 195                 if not pointed_thing.type == "node" then
 196                         return
 197                 end
 198
 199                 local sneak = placer:get_player_control().sneak
 200                 local noddef = minetest.registered_nodes[minetest.get_node(pointed_thing.under).name]
 201                 if not sneak and noddef.on_rightclick then
 202                         minetest.item_place(itemstack, placer, pointed_thing)
 203                         return
 204                 end
 205
 206                 if minetest.get_item_group(minetest.get_node(pointed_thing.under).name, "rail")>0 then
 207                         minetest.add_entity(pointed_thing.under, "minecart:minecart")
 208                 else
 209                         return
 210                 end
 211
 212                 itemstack:take_item()
 213
 214                 return itemstack
 215         end,
 216 })
 217
 218 minetest.register_craft({
 219         output = "minecart:minecart",
 220         recipe = {
 221                 {"main:iron", "", "main:iron"},
 222                 {"main:iron", "main:iron", "main:iron"},
 223         },
 224 })
 225
 226
 227
 228
 229
 230 minetest.register_node("minecart:rail",{
 231         description = "Rail",
 232         wield_image = "rail.png",
 233         tiles = {
 234                 "rail.png", "railcurve.png",
 235                 "railt.png", "railcross.png"
 236         },
 237         drawtype = "raillike",
 238         paramtype = "light",
 239         sunlight_propagates = true,
 240         is_ground_content = false,
 241         walkable = false,
 242         node_placement_prediction = "",
 243         selection_box = {
 244                 type = "fixed",
 245                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 246         },
 247         sounds = main.stoneSound(),
 248         after_place_node = function(pos)
 249                 data_injection(pos,true)
 250         end,
 251         after_destruct = function(pos)
 252                 data_injection(pos)
 253         end,
 254         groups={stone=1,wood=1,rail=1,attached_node=1},
 255 })
 256
 257
 258 minetest.register_lbm({
 259         name = "minecart:rail",
 260         nodenames = {"minecart:rail"},
 261         run_at_every_load = true,
 262         action = function(pos)
 263                 data_injection(pos,true)
 264                 print("buildin dat cash")
 265         end,
 266 })
 267
 268 minetest.register_craft({
 269         output = "minecart:rail 32",
 270         recipe = {
 271                 {"main:iron","","main:iron"},
 272                 {"main:iron","main:stick","main:iron"},
 273                 {"main:iron","","main:iron"}
 274         }
 275 })