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
 119         local yaw = minetest.dir_to_yaw(dir)
 120
 121         if self.driver then
 122                 self.driver:set_look_vertical(pitch)
 123                 self.driver:set_look_horizontal(yaw)
 124         end
 125         self.object:set_rotation(vector.new(pitch,yaw,0))
 126
 127
 128 end
 129
 130 local function turn_snap(pos,self,dir,dir2)
 131         if self.axis_lock == "x" then
 132                 if dir.x ~= 0 and dir2.z ~= 0 then
 133                         local velocity = self.object:get_velocity()
 134                         local inertia = math.abs(velocity.x)
 135                         self.object:set_velocity(vector.multiply(dir2,inertia))
 136                         self.dir = dir2
 137                         self.axis_lock = "z"
 138                         self.object:set_pos(pos)
 139                         direction_snap(self)
 140                         return(true)
 141                 end
 142         end
 143         if self.axis_lock == "z" then
 144                 if dir.z ~= 0 and dir2.x ~= 0 then
 145                         local velocity = self.object:get_velocity()
 146                         local inertia = math.abs(velocity.z)
 147                         self.object:set_velocity(vector.multiply(dir2,inertia))
 148                         self.dir = dir2
 149                         self.axis_lock = "x"
 150                         self.object:set_pos(pos)
 151                         direction_snap(self)
 152                         return(true)
 153                 end
 154         end
 155         return(false)
 156 end
 157
 158 local function climb_snap(pos,self,dir,dir2)
 159         if self.axis_lock == "x" then
 160                 if dir.x == dir2.x and dir2.y ~= 0 then
 161                         local velocity = self.object:get_velocity()
 162                         local inertia = math.abs(velocity.x)
 163                         self.object:set_velocity(vector.multiply(dir2,inertia))
 164                         self.dir = dir2
 165                         self.axis_lock = "x"
 166                         self.object:set_pos(pos)
 167                         direction_snap(self)
 168                         return(true)
 169                 end
 170         end
 171         if self.axis_lock == "z" then
 172                 if dir.z == dir2.z and dir2.y ~= 0 then
 173                         local velocity = self.object:get_velocity()
 174                         local inertia = math.abs(velocity.z)
 175                         self.object:set_velocity(vector.multiply(dir2,inertia))
 176                         self.dir = dir2
 177                         self.axis_lock = "z"
 178                         self.object:set_pos(pos)
 179                         direction_snap(self)
 180                         return(true)
 181                 end
 182         end
 183         return(false)
 184 end
 185
 186 local function straight_snap(pos,self,dir)
 187         if self.axis_lock == "x" then
 188                 if dir.x ~= 0 and pool[minetest.hash_node_position(vector.add(pos,vector.new(dir.x,0,0)))] then
 189                         local velocity = self.object:get_velocity()
 190                         self.object:set_velocity(vector.new(velocity.x,0,0))
 191                         self.dir = vector.new(dir.x,0,0)
 192                         self.axis_lock = "x"
 193                         self.object:set_pos(pos)
 194                         direction_snap(self)
 195                         return(true)
 196                 end
 197         end
 198         if self.axis_lock == "z" then
 199                 if dir.z ~= 0 and pool[minetest.hash_node_position(vector.add(pos,vector.new(0,0,dir.z)))] then
 200                         local velocity = self.object:get_velocity()
 201                         self.object:set_velocity(vector.new(0,0,velocity.z))
 202                         self.dir = vector.new(0,0,dir.z)
 203                         self.axis_lock = "z"
 204                         self.object:set_pos(pos)
 205                         direction_snap(self)
 206                         return(true)
 207                 end
 208         end
 209         return(false)
 210 end
 211
 212
 213 local function coupling_logic(self)
 214
 215         if not self.axis_lock then return end
 216
 217         if not self.coupler1 then return end
 218
 219         if self.dir.y ~= 0 then return end
 220
 221         local pos = self.object:get_pos()
 222
 223         local pos2 = self.coupler1:get_pos()
 224
 225         local coupler_goal = self.coupler1:get_luaentity().coupler_distance
 226
 227         if self.axis_lock == "x" then
 228                 local velocity_real = self.object:get_velocity()
 229                 local distance = vector.distance(pos,pos2)
 230                 local new_vel = vector.new(0,0,0)
 231                 if distance > coupler_goal then
 232                         local velocity = (distance-coupler_goal)
 233                         local dir = vector.direction(vector.new(pos.x,0,0),vector.new(pos2.x,0,0))
 234                         self.dir = dir
 235                         new_vel = vector.multiply(dir,velocity)
 236                 else
 237                         new_vel = vector.multiply(velocity_real,-1)
 238                 end
 239                 self.object:add_velocity(new_vel)
 240         elseif self.axis_lock == "z" then
 241                 local velocity_real = self.object:get_velocity()
 242                 local distance = vector.distance(pos,pos2)
 243                 local new_vel = vector.new(0,0,0)
 244                 if distance > coupler_goal then
 245                         local velocity = (distance-coupler_goal)
 246                         local dir = vector.direction(vector.new(0,0,pos.z),vector.new(0,0,pos2.z))
 247                         self.dir = dir
 248                         new_vel = vector.multiply(dir,velocity)
 249                 else
 250                         new_vel = vector.multiply(velocity_real,-1)
 251                 end
 252                 self.object:add_velocity(new_vel)
 253         end
 254
 255         return
 256 end
 257
 258
 259 local function rail_brain(self,pos)
 260
 261         if not self.dir then self.dir = vector.new(0,0,0) end
 262
 263         local pos2 = self.object:get_pos()
 264
 265         local dir = self.dir
 266
 267         speed_limiter(self,6)
 268
 269         if not pool[minetest.hash_node_position(vector.add(pos,dir))] then
 270
 271                 if straight_snap(pos,self,dir) then
 272                         return
 273                 end
 274
 275                 local possible_dirs = create_axis(pos)
 276
 277                 if table.getn(possible_dirs) == 0 then
 278                         --stop slow down become physical
 279                 else
 280                         for _,dir2 in pairs(possible_dirs) do
 281                                 if turn_snap(pos,self,dir,dir2) then
 282                                         return
 283                                 end
 284                                 if climb_snap(pos,self,dir,dir2) then
 285                                         return
 286                                 end
 287                         end
 288                 end
 289         else
 290                 coupling_logic(self)
 291         end
 292
 293 end
 294
 295
 296 --[[
 297  █████╗ ██████╗ ██╗    ██████╗ ███████╗ ██████╗ ██╗███╗   ██╗
 298 ██╔══██╗██╔══██╗██║    ██╔══██╗██╔════╝██╔════╝ ██║████╗  ██║
 299 ███████║██████╔╝██║    ██████╔╝█████╗  ██║  ███╗██║██╔██╗ ██║
 300 ██╔══██║██╔═══╝ ██║    ██╔══██╗██╔══╝  ██║   ██║██║██║╚██╗██║
 301 ██║  ██║██║     ██║    ██████╔╝███████╗╚██████╔╝██║██║ ╚████║
 302 ╚═╝  ╚═╝╚═╝     ╚═╝    ╚═════╝ ╚══════╝ ╚═════╝ ╚═╝╚═╝  ╚═══╝
 303 ]]--
 304
 305
 306 function register_train(name,data)
 307 local train = {}
 308
 309 train.power            = data.power
 310 train.coupler_distance = data.coupler_distance
 311 train.is_car           = data.is_car
 312 train.is_engine        = data.is_engine
 313 train.max_speed        = data.max_speed
 314 train.driver           = nil
 315
 316 train.initial_properties = {
 317         physical = false, -- otherwise going uphill breaks
 318         collisionbox = {-0.4, -0.5, -0.4, 0.4, 0.45, 0.4},
 319         visual = "mesh",
 320         mesh = data.mesh,
 321         visual_size = {x=1, y=1},
 322         textures = {data.texture},
 323 }
 324
 325
 326 train.on_step = function(self,dtime)
 327         if dtime > 0.1 then
 328                 self.object:set_pos(self.old_pos)
 329         end
 330         local pos = vector.round(self.object:get_pos())
 331         if not self.axis_lock then
 332                 local possible_dirs = create_axis(pos)
 333                 for _,dir in pairs(possible_dirs) do
 334                         if dir.x ~=0 then
 335                                 self.axis_lock = "x"
 336                                 self.dir = dir
 337                                 direction_snap(self)
 338                                 break
 339                         elseif dir.z ~= 0 then
 340                                 self.axis_lock = "z"
 341                                 self.dir = dir
 342                                 direction_snap(self)
 343                                 break
 344                         end
 345                 end
 346         else
 347                 rail_brain(self,pos)
 348                 --collision_detect(self)
 349         end
 350         self.old_pos = self.object:get_pos()
 351 end
 352
 353
 354
 355
 356 train.on_punch = function(self, puncher)
 357         if not puncher:get_wielded_item():get_name() == "train:wrench" then
 358                 return
 359         end
 360
 361         if self.is_engine and puncher:get_player_control().sneak then
 362                 if vector.equals(self.object:get_velocity(),vector.new(0,0,0)) then
 363                         print("reverse direction")
 364                 end
 365                 return
 366         end
 367
 368         if self.coupler1 then
 369                 self.coupler1:get_luaentity().coupler2 = nil
 370                 self.coupler1 = nil
 371         end
 372
 373         if self.coupler2 then
 374                 self.coupler2:get_luaentity().coupler1 = nil
 375                 self.coupler2 = nil
 376         end
 377
 378 end
 379
 380
 381 train.on_rightclick = function(self,clicker)
 382         --[[
 383         if clicker:get_wielded_item():get_name() == "utility:furnace" then
 384                 local obj = minetest.add_entity(pos, "train:furnace")
 385                 obj:set_attach(self.object,"",vector.new(0,0,0),vector.new(0,0,0))
 386                 minetest.sound_play("wrench",{
 387                         object = self.object,
 388                         gain = 1.0,
 389                         max_hear_distance = 64,
 390                 })
 391                 coupling_particles(pos,true)
 392                 self.furnace = true
 393                 return
 394         end
 395         ]]--
 396
 397         if clicker:get_wielded_item():get_name() ~= "train:wrench" then
 398                 if self.is_engine then
 399                         print("jump on in")
 400                         clicker:set_attach(self.object, "", data.body_pos, data.body_rotation)
 401                         clicker:set_eye_offset(data.eye_offset,{x=0,y=0,z=0})
 402                         player_is_attached(clicker,true)
 403                         set_player_animation(clicker,"stand",0)
 404                         local rotation = self.object:get_rotation()
 405                         clicker:set_look_vertical(0)
 406                         clicker:set_look_horizontal(rotation.y)
 407                         self.object:set_velocity(vector.multiply(self.dir,self.max_speed))
 408                         self.driver = clicker
 409                         return
 410                 end
 411                 return
 412         end
 413
 414         local pos = self.object:get_pos()
 415
 416         local name = clicker:get_player_name()
 417         if not pool[name] then
 418                 if not self.coupler2 then
 419                         pool[name] = self.object
 420                         minetest.sound_play("wrench",{
 421                                 object = self.object,
 422                                 gain = 1.0,
 423                                 max_hear_distance = 64,
 424                         })
 425                         coupling_particles(pos,true)
 426                 else
 427                         minetest.sound_play("wrench",{
 428                                 object = self.object,
 429                                 gain = 1.0,
 430                                 max_hear_distance = 64,
 431                                 pitch = 0.7,
 432                         })
 433                         coupling_particles(pos,false)
 434                 end
 435         else
 436                 if not self.is_engine and pool[name] ~= self.object and not (pool[name]:get_luaentity().coupler1 and pool[name]:get_luaentity().coupler1 == self.object or self.coupler2) then
 437                         self.coupler1 = pool[name]
 438                         pool[name]:get_luaentity().coupler2 = self.object
 439                         minetest.sound_play("wrench",{
 440                                 object = self.object,
 441                                 gain = 1.0,
 442                                 max_hear_distance = 64,
 443                         })
 444                         coupling_particles(pos,true)
 445                 else
 446                         minetest.sound_play("wrench",{
 447                                 object = self.object,
 448                                 gain = 1.0,
 449                                 max_hear_distance = 64,
 450                                 pitch = 0.7,
 451                         })
 452                         coupling_particles(pos,false)
 453                 end
 454                 pool[name] = nil
 455         end
 456 end
 457
 458 --get old data
 459 train.on_activate = function(self,staticdata, dtime_s)
 460         self.object:set_armor_groups({immortal=1})
 461         if string.sub(staticdata, 1, string.len("return")) ~= "return" then
 462                 return
 463         end
 464         local data = minetest.deserialize(staticdata)
 465         if type(data) ~= "table" then
 466                 return
 467         end
 468         self.old_pos = self.object:get_pos()
 469         self.velocity = vector.new(0,0,0)
 470 end
 471
 472 train.get_staticdata = function(self)
 473         return minetest.serialize({
 474         })
 475 end
 476
 477 minetest.register_entity(name, train)
 478
 479 end
 480
 481 --[[
 482 ███████╗███╗   ██╗██████╗
 483 ██╔════╝████╗  ██║██╔══██╗
 484 █████╗  ██╔██╗ ██║██║  ██║
 485 ██╔══╝  ██║╚██╗██║██║  ██║
 486 ███████╗██║ ╚████║██████╔╝
 487 ╚══════╝╚═╝  ╚═══╝╚═════╝
 488 ]]--
 489
 490
 491
 492
 493 register_train("train:steam_train",{
 494         mesh = "steam_train.b3d",
 495         texture = "steam_train.png",
 496         is_engine = true,
 497         power = 6,
 498         max_speed = 6,
 499         coupler_distance = 2,
 500         body_pos = vector.new(0,0,-15),
 501         body_rotation = vector.new(0,0,0),
 502         eye_offset = vector.new(6,-1,-10)
 503 })
 504
 505
 506
 507 minetest.register_craftitem("train:train", {
 508         description = "train",
 509         inventory_image = "minecartitem.png",
 510         wield_image = "minecartitem.png",
 511         on_place = function(itemstack, placer, pointed_thing)
 512                 if not pointed_thing.type == "node" then
 513                         return
 514                 end
 515
 516                 local sneak = placer:get_player_control().sneak
 517                 local noddef = minetest.registered_nodes[minetest.get_node(pointed_thing.under).name]
 518                 if not sneak and noddef.on_rightclick then
 519                         minetest.item_place(itemstack, placer, pointed_thing)
 520                         return
 521                 end
 522
 523                 if minetest.get_item_group(minetest.get_node(pointed_thing.under).name, "rail")>0 then
 524                         minetest.add_entity(pointed_thing.under, "train:steam_train")
 525                 else
 526                         return
 527                 end
 528
 529                 itemstack:take_item()
 530
 531                 return itemstack
 532         end,
 533 })
 534
 535 minetest.register_craft({
 536         output = "train:train",
 537         recipe = {
 538                 {"main:iron", "", "main:iron"},
 539                 {"main:iron", "main:iron", "main:iron"},
 540         },
 541 })
 542
 543
 544
 545
 546
 547 minetest.register_node("train:rail",{
 548         description = "Rail",
 549         wield_image = "rail.png",
 550         tiles = {
 551                 "rail.png", "railcurve.png",
 552                 "railt.png", "railcross.png"
 553         },
 554         drawtype = "raillike",
 555         paramtype = "light",
 556         sunlight_propagates = true,
 557         is_ground_content = false,
 558         walkable = false,
 559         node_placement_prediction = "",
 560         selection_box = {
 561                 type = "fixed",
 562                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 563         },
 564         sounds = main.stoneSound(),
 565         after_place_node = function(pos)
 566                 data_injection(pos,true)
 567         end,
 568         after_destruct = function(pos)
 569                 data_injection(pos)
 570         end,
 571         groups={stone=1,wood=1,rail=1,attached_node=1},
 572 })
 573
 574
 575 minetest.register_lbm({
 576         name = "train:rail",
 577         nodenames = {"train:rail"},
 578         run_at_every_load = true,
 579         action = function(pos)
 580                 data_injection(pos,true)
 581         end,
 582 })
 583
 584 minetest.register_craft({
 585         output = "train:rail 32",
 586         recipe = {
 587                 {"main:iron","","main:iron"},
 588                 {"main:iron","main:stick","main:iron"},
 589                 {"main:iron","","main:iron"}
 590         }
 591 })
 592
 593
 594 minetest.register_food("train:wrench",{
 595         description = "Train Wrench",
 596         texture = "wrench.png",
 597 })
 598
 599 minetest.register_craft({
 600         output = "train:wrench",
 601         recipe = {
 602                 {"main:iron", "", "main:iron"},
 603                 {"main:iron", "main:lapis", "main:iron"},
 604                 {"", "main:lapis", ""}
 605         }
 606 })
 607
 608
 609
 610 minetest.register_entity("train:furnace", {
 611         initial_properties = {
 612                 visual = "wielditem",
 613                 visual_size = {x = 0.6, y = 0.6},
 614                 textures = {},
 615                 physical = true,
 616                 is_visible = false,
 617                 collide_with_objects = false,
 618                 pointable=false,
 619                 collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
 620         },
 621         set_node = function(self)
 622                 self.object:set_properties({
 623                         is_visible = true,
 624                         textures = {"utility:furnace"},
 625                 })
 626         end,
 627
 628
 629         on_activate = function(self, staticdata)
 630                 self.object:set_armor_groups({immortal = 1})
 631
 632                 self:set_node()
 633         end,
 634 })