mods/train/init.lua

   1 local pool = {}
   2
   3 local player_pool = {}
   4
   5
   6 local dirs = {
   7         {x= 1,y= 0,z= 0},
   8         {x=-1,y= 0,z= 0},
   9
  10         {x= 1,y= 1,z= 0},
  11         {x=-1,y= 1,z= 0},
  12
  13         {x= 1,y=-1,z= 0},
  14         {x=-1,y=-1,z= 0},
  15
  16         {x= 0,y= 0,z= 1},
  17         {x= 0,y= 0,z=-1},
  18
  19         {x= 0,y= 1,z= 1},
  20         {x= 0,y= 1,z=-1},
  21
  22         {x= 0,y=-1,z= 1},
  23         {x= 0,y=-1,z=-1},
  24 }
  25
  26 local function coupling_particles(pos,truth)
  27         local color = "red"
  28         if truth then
  29                 color = "green"
  30         end
  31
  32         minetest.add_particlespawner({
  33                 amount = 15,
  34                 time = 0.001,
  35                 minpos = pos,
  36                 maxpos = pos,
  37                 minvel = vector.new(-10,-10,-10),
  38                 maxvel = vector.new(10,10,10),
  39                 minacc = {x=0, y=0, z=0},
  40                 maxacc = {x=0, y=0, z=0},
  41                 minexptime = 1.1,
  42                 maxexptime = 1.5,
  43                 minsize = 1,
  44                 maxsize = 2,
  45                 collisiondetection = false,
  46                 collision_removal = false,
  47                 vertical = false,
  48                 texture = "couple_particle.png^[colorize:"..color..":200",
  49                 glow = 14,
  50         })
  51 end
  52
  53 local function data_injection(pos,data)
  54         if data then
  55                 pool[minetest.hash_node_position(pos)] = true
  56         else
  57                 pool[minetest.hash_node_position(pos)] = nil
  58         end
  59 end
  60
  61 local function speed_limiter(self,speed)
  62         local test = self.object:get_velocity()--vector.multiply(self.velocity,new_vel)
  63
  64         if test.x > speed then
  65                 test.x = speed
  66         elseif test.x < -speed then
  67                 test.x = -speed
  68         end
  69         if test.z > speed then
  70                 test.z = speed
  71         elseif test.z < -speed then
  72                 test.z = -speed
  73         end
  74         self.object:set_velocity(test)
  75 end
  76
  77 local function create_axis(pos)
  78         local possible_dirs = {}
  79         for _,dir in pairs(dirs) do
  80                 local pos2 = vector.add(pos,dir)
  81                 if pool[minetest.hash_node_position(pos2)] then
  82                         table.insert(possible_dirs,dir)
  83                 end
  84         end
  85         return(possible_dirs)
  86 end
  87
  88 local function collision_detect(self)
  89         if not self.axis_lock then return end
  90         local pos = self.object:get_pos()
  91         for _,object in ipairs(minetest.get_objects_inside_radius(pos, 1)) do
  92                 if object:is_player() then
  93                         local pos2 = object:get_pos()
  94                         if self.axis_lock == "x" then
  95
  96                                 local velocity = (1-vector.distance(vector.new(pos.x,0,0),vector.new(pos2.x,0,0)))*5
  97                                 local dir = vector.direction(vector.new(pos2.x,0,0),vector.new(pos.x,0,0))
  98                                 local new_vel = vector.multiply(dir,velocity)
  99                                 self.object:add_velocity(new_vel)
 100                                 self.dir = dir
 101                         elseif self.axis_lock == "z" then
 102                                 local velocity = (1-vector.distance(vector.new(0,0,pos.z),vector.new(0,0,pos2.z)))*5
 103                                 local dir = vector.direction(vector.new(0,0,pos2.z),vector.new(0,0,pos.z))
 104                                 local new_vel = vector.multiply(dir,velocity)
 105                                 self.object:add_velocity(new_vel)
 106                                 self.dir = dir
 107                         end
 108                         return
 109                 end
 110         end
 111 end
 112
 113 local function direction_snap(self)
 114         local dir = self.dir
 115         local pitch = 0
 116         if dir.y == 1 then pitch = math.pi/4 end
 117         if dir.y == -1 then pitch = -math.pi/4 end
 118         local yaw = minetest.dir_to_yaw(dir)
 119         self.object:set_rotation(vector.new(pitch,yaw,0))
 120 end
 121
 122 local function turn_snap(pos,self,dir,dir2)
 123         if self.axis_lock == "x" then
 124                 if dir.x ~= 0 and dir2.z ~= 0 then
 125                         local velocity = self.object:get_velocity()
 126                         local inertia = math.abs(velocity.x)
 127                         self.object:set_velocity(vector.multiply(dir2,inertia))
 128                         self.dir = dir2
 129                         self.axis_lock = "z"
 130                         self.object:set_pos(pos)
 131                         direction_snap(self)
 132                         return(true)
 133                 end
 134         end
 135         if self.axis_lock == "z" then
 136                 if dir.z ~= 0 and dir2.x ~= 0 then
 137                         local velocity = self.object:get_velocity()
 138                         local inertia = math.abs(velocity.z)
 139                         self.object:set_velocity(vector.multiply(dir2,inertia))
 140                         self.dir = dir2
 141                         self.axis_lock = "x"
 142                         self.object:set_pos(pos)
 143                         direction_snap(self)
 144                         return(true)
 145                 end
 146         end
 147         return(false)
 148 end
 149
 150 local function climb_snap(pos,self,dir,dir2)
 151         if self.axis_lock == "x" then
 152                 if dir.x == dir2.x and dir2.y ~= 0 then
 153                         local velocity = self.object:get_velocity()
 154                         local inertia = math.abs(velocity.x)
 155                         self.object:set_velocity(vector.multiply(dir2,inertia))
 156                         self.dir = dir2
 157                         self.axis_lock = "x"
 158                         self.object:set_pos(pos)
 159                         direction_snap(self)
 160                         return(true)
 161                 end
 162         end
 163         if self.axis_lock == "z" then
 164                 if dir.z == dir2.z and dir2.y ~= 0 then
 165                         local velocity = self.object:get_velocity()
 166                         local inertia = math.abs(velocity.z)
 167                         self.object:set_velocity(vector.multiply(dir2,inertia))
 168                         self.dir = dir2
 169                         self.axis_lock = "z"
 170                         self.object:set_pos(pos)
 171                         direction_snap(self)
 172                         return(true)
 173                 end
 174         end
 175         return(false)
 176 end
 177
 178 local function straight_snap(pos,self,dir)
 179         if self.axis_lock == "x" then
 180                 if dir.x ~= 0 and pool[minetest.hash_node_position(vector.add(pos,vector.new(dir.x,0,0)))] then
 181                         local velocity = self.object:get_velocity()
 182                         self.object:set_velocity(vector.new(velocity.x,0,0))
 183                         self.dir = vector.new(dir.x,0,0)
 184                         self.axis_lock = "x"
 185                         self.object:set_pos(pos)
 186                         direction_snap(self)
 187                         return(true)
 188                 end
 189         end
 190         if self.axis_lock == "z" then
 191                 if dir.z ~= 0 and pool[minetest.hash_node_position(vector.add(pos,vector.new(0,0,dir.z)))] then
 192                         local velocity = self.object:get_velocity()
 193                         self.object:set_velocity(vector.new(0,0,velocity.z))
 194                         self.dir = vector.new(0,0,dir.z)
 195                         self.axis_lock = "z"
 196                         self.object:set_pos(pos)
 197                         direction_snap(self)
 198                         return(true)
 199                 end
 200         end
 201         return(false)
 202 end
 203
 204
 205 local function coupling_logic(self)
 206
 207         if not self.axis_lock then return end
 208
 209         if not self.coupler1 then return end
 210
 211         if self.dir.y ~= 0 then return end
 212
 213         local pos = self.object:get_pos()
 214
 215         local pos2 = self.coupler1:get_pos()
 216
 217         if self.axis_lock == "x" then
 218                 local velocity_real = self.object:get_velocity()
 219                 local distance = vector.distance(pos,pos2)
 220                 local new_vel = vector.new(0,0,0)
 221                 if distance > 1.5 then
 222                         local velocity = (distance-1)
 223                         local dir = vector.direction(vector.new(pos.x,0,0),vector.new(pos2.x,0,0))
 224                         self.dir = dir
 225                         new_vel = vector.multiply(dir,velocity)
 226                 else
 227                         new_vel = vector.multiply(velocity_real,-1)
 228                 end
 229                 self.object:add_velocity(new_vel)
 230         elseif self.axis_lock == "z" then
 231                 local velocity_real = self.object:get_velocity()
 232                 local distance = vector.distance(pos,pos2)
 233                 local new_vel = vector.new(0,0,0)
 234                 if distance > 1.5 then
 235                         local velocity = (distance-1)
 236                         local dir = vector.direction(vector.new(0,0,pos.z),vector.new(0,0,pos2.z))
 237                         self.dir = dir
 238                         new_vel = vector.multiply(dir,velocity)
 239                 else
 240                         new_vel = vector.multiply(velocity_real,-1)
 241                 end
 242                 self.object:add_velocity(new_vel)
 243         end
 244
 245         return
 246 end
 247
 248
 249 local function rail_brain(self,pos)
 250
 251         if not self.dir then self.dir = vector.new(0,0,0) end
 252
 253         local pos2 = self.object:get_pos()
 254
 255         local dir = self.dir
 256
 257         speed_limiter(self,6)
 258
 259         if not pool[minetest.hash_node_position(vector.add(pos,dir))] then
 260
 261                 if straight_snap(pos,self,dir) then
 262                         return
 263                 end
 264
 265                 local possible_dirs = create_axis(pos)
 266
 267                 if table.getn(possible_dirs) == 0 then
 268                         --stop slow down become physical
 269                 else
 270                         for _,dir2 in pairs(possible_dirs) do
 271                                 if turn_snap(pos,self,dir,dir2) then
 272                                         return
 273                                 end
 274                                 if climb_snap(pos,self,dir,dir2) then
 275                                         return
 276                                 end
 277                         end
 278                 end
 279         else
 280                 coupling_logic(self)
 281         end
 282
 283 end
 284
 285 function register_train(name,data)
 286
 287         local train = {}
 288
 289         train.on_step = function(self,dtime)
 290                 if dtime > 0.1 then
 291                         self.object:set_pos(self.old_pos)
 292                 end
 293                 local pos = vector.round(self.object:get_pos())
 294                 if not self.axis_lock then
 295                         local possible_dirs = create_axis(pos)
 296                         for _,dir in pairs(possible_dirs) do
 297                                 if dir.x ~=0 then
 298                                         self.axis_lock = "x"
 299                                         self.dir = dir
 300                                         direction_snap(self)
 301                                         break
 302                                 elseif dir.z ~= 0 then
 303                                         self.axis_lock = "z"
 304                                         self.dir = dir
 305                                         direction_snap(self)
 306                                         break
 307                                 end
 308                         end
 309                 else
 310                         rail_brain(self,pos)
 311                         --collision_detect(self)
 312                 end
 313                 self.old_pos = self.object:get_pos()
 314         end
 315
 316
 317         train.on_punch = function(self, puncher)
 318                 if not puncher:get_wielded_item():get_name() == "train:wrench" then
 319                         return
 320                 end
 321                 if self.furnace then
 322                         self.object:set_velocity(vector.multiply(self.dir,6))
 323                         minetest.add_particlespawner({
 324                                 amount = 30,
 325                                 time = 0,
 326                                 minpos = vector.new(0,0.5,0),
 327                                 maxpos = vector.new(0,0.5,0),
 328                                 minvel = vector.new(0,0,0),
 329                                 maxvel = vector.new(0,0,0),
 330                                 minacc = {x=0, y=3, z=0},
 331                                 maxacc = {x=0, y=5, z=0},
 332                                 minexptime = 1.1,
 333                                 maxexptime = 1.5,
 334                                 minsize = 1,
 335                                 maxsize = 2,
 336                                 collisiondetection = false,
 337                                 collision_removal = false,
 338                                 vertical = false,
 339                                 texture = "smoke.png",
 340                                 attached = self.object
 341                         })
 342                 end
 343
 344         end
 345
 346
 347         train.on_rightclick = function(self,clicker)
 348                 local pos = self.object:get_pos()
 349                 if clicker:get_wielded_item():get_name() == "utility:furnace" then
 350                         local obj = minetest.add_entity(pos, "train:furnace")
 351                         obj:set_attach(self.object,"",vector.new(0,0,0),vector.new(0,0,0))
 352                         minetest.sound_play("wrench",{
 353                                 object = self.object,
 354                                 gain = 1.0,
 355                                 max_hear_distance = 64,
 356                         })
 357                         coupling_particles(pos,true)
 358                         self.furnace = true
 359                         return
 360                 end
 361
 362                 if not clicker:get_wielded_item():get_name() == "train:wrench" then
 363                         return
 364                 end
 365
 366                 local name = clicker:get_player_name()
 367                 if not pool[name] then
 368                         if not self.coupler2 then
 369                                 pool[name] = self.object
 370                                 minetest.sound_play("wrench",{
 371                                         object = self.object,
 372                                         gain = 1.0,
 373                                         max_hear_distance = 64,
 374                                 })
 375                                 coupling_particles(pos,true)
 376                         else
 377                                 minetest.sound_play("wrench",{
 378                                         object = self.object,
 379                                         gain = 1.0,
 380                                         max_hear_distance = 64,
 381                                         pitch = 0.7,
 382                                 })
 383                                 coupling_particles(pos,false)
 384                         end
 385                 else
 386                         if pool[name] ~= self.object and not (pool[name]:get_luaentity().coupler1 and pool[name]:get_luaentity().coupler1 == self.object or self.coupler2) then
 387                                 self.coupler1 = pool[name]
 388                                 pool[name]:get_luaentity().coupler2 = self.object
 389                                 minetest.sound_play("wrench",{
 390                                         object = self.object,
 391                                         gain = 1.0,
 392                                         max_hear_distance = 64,
 393                                 })
 394                                 coupling_particles(pos,true)
 395                         else
 396                                 minetest.sound_play("wrench",{
 397                                         object = self.object,
 398                                         gain = 1.0,
 399                                         max_hear_distance = 64,
 400                                         pitch = 0.7,
 401                                 })
 402                                 coupling_particles(pos,false)
 403                         end
 404                         pool[name] = nil
 405                 end
 406         end
 407
 408         --get old data
 409         train.on_activate = function(self,staticdata, dtime_s)
 410                 self.object:set_armor_groups({immortal=1})
 411                 if string.sub(staticdata, 1, string.len("return")) ~= "return" then
 412                         return
 413                 end
 414                 local data = minetest.deserialize(staticdata)
 415                 if type(data) ~= "table" then
 416                         return
 417                 end
 418                 self.old_pos = self.object:get_pos()
 419                 self.velocity = vector.new(0,0,0)
 420         end
 421
 422         train.get_staticdata = function(self)
 423                 return minetest.serialize({
 424                 })
 425         end
 426
 427
 428
 429         train.initial_properties = {
 430                 physical = false, -- otherwise going uphill breaks
 431                 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},
 432                 visual = "mesh",
 433                 mesh = "steam_train.b3d",
 434                 visual_size = {x=1, y=1},
 435                 textures = {"steam_train.png"},
 436         }
 437
 438
 439
 440         minetest.register_entity(name, train)
 441
 442 end
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453 minetest.register_craftitem("train:minecart", {
 454         description = "train",
 455         inventory_image = "minecartitem.png",
 456         wield_image = "minecartitem.png",
 457         on_place = function(itemstack, placer, pointed_thing)
 458                 if not pointed_thing.type == "node" then
 459                         return
 460                 end
 461
 462                 local sneak = placer:get_player_control().sneak
 463                 local noddef = minetest.registered_nodes[minetest.get_node(pointed_thing.under).name]
 464                 if not sneak and noddef.on_rightclick then
 465                         minetest.item_place(itemstack, placer, pointed_thing)
 466                         return
 467                 end
 468
 469                 if minetest.get_item_group(minetest.get_node(pointed_thing.under).name, "rail")>0 then
 470                         minetest.add_entity(pointed_thing.under, "train:train")
 471                 else
 472                         return
 473                 end
 474
 475                 itemstack:take_item()
 476
 477                 return itemstack
 478         end,
 479 })
 480
 481 minetest.register_craft({
 482         output = "train:train",
 483         recipe = {
 484                 {"main:iron", "", "main:iron"},
 485                 {"main:iron", "main:iron", "main:iron"},
 486         },
 487 })
 488
 489
 490
 491
 492
 493 minetest.register_node("train:rail",{
 494         description = "Rail",
 495         wield_image = "rail.png",
 496         tiles = {
 497                 "rail.png", "railcurve.png",
 498                 "railt.png", "railcross.png"
 499         },
 500         drawtype = "raillike",
 501         paramtype = "light",
 502         sunlight_propagates = true,
 503         is_ground_content = false,
 504         walkable = false,
 505         node_placement_prediction = "",
 506         selection_box = {
 507                 type = "fixed",
 508                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 509         },
 510         sounds = main.stoneSound(),
 511         after_place_node = function(pos)
 512                 data_injection(pos,true)
 513         end,
 514         after_destruct = function(pos)
 515                 data_injection(pos)
 516         end,
 517         groups={stone=1,wood=1,rail=1,attached_node=1},
 518 })
 519
 520
 521 minetest.register_lbm({
 522         name = "train:rail",
 523         nodenames = {"train:rail"},
 524         run_at_every_load = true,
 525         action = function(pos)
 526                 data_injection(pos,true)
 527         end,
 528 })
 529
 530 minetest.register_craft({
 531         output = "train:rail 32",
 532         recipe = {
 533                 {"main:iron","","main:iron"},
 534                 {"main:iron","main:stick","main:iron"},
 535                 {"main:iron","","main:iron"}
 536         }
 537 })
 538
 539
 540 minetest.register_food("train:wrench",{
 541         description = "Train Wrench",
 542         texture = "wrench.png",
 543 })
 544
 545 minetest.register_craft({
 546         output = "train:wrench",
 547         recipe = {
 548                 {"main:iron", "", "main:iron"},
 549                 {"main:iron", "main:lapis", "main:iron"},
 550                 {"", "main:lapis", ""}
 551         }
 552 })
 553
 554
 555
 556 minetest.register_entity("train:furnace", {
 557         initial_properties = {
 558                 visual = "wielditem",
 559                 visual_size = {x = 0.6, y = 0.6},
 560                 textures = {},
 561                 physical = true,
 562                 is_visible = false,
 563                 collide_with_objects = false,
 564                 pointable=false,
 565                 collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
 566         },
 567         set_node = function(self)
 568                 self.object:set_properties({
 569                         is_visible = true,
 570                         textures = {"utility:furnace"},
 571                 })
 572         end,
 573
 574
 575         on_activate = function(self, staticdata)
 576                 self.object:set_armor_groups({immortal = 1})
 577
 578                 self:set_node()
 579         end,
 580 })