mods/minecart/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
 252         if not self.dir then self.dir = vector.new(0,0,0) end
 253
 254         local pos2 = self.object:get_pos()
 255
 256         local dir = self.dir
 257
 258         speed_limiter(self,6)
 259
 260         if not pool[minetest.hash_node_position(vector.add(pos,dir))] then
 261
 262                 if straight_snap(pos,self,dir) then
 263                         return
 264                 end
 265
 266                 local possible_dirs = create_axis(pos)
 267
 268                 if table.getn(possible_dirs) == 0 then
 269                         --stop slow down become physical
 270                 else
 271                         for _,dir2 in pairs(possible_dirs) do
 272                                 if turn_snap(pos,self,dir,dir2) then
 273                                         return
 274                                 end
 275                                 if climb_snap(pos,self,dir,dir2) then
 276                                         return
 277                                 end
 278                         end
 279                 end
 280         else
 281                 coupling_logic(self)
 282         end
 283
 284 end
 285
 286 local minecart = {}
 287
 288 minecart.on_step = function(self,dtime)
 289         local pos = vector.round(self.object:get_pos())
 290         if not self.axis_lock then
 291                 local possible_dirs = create_axis(pos)
 292                 for _,dir in pairs(possible_dirs) do
 293                         if dir.x ~=0 then
 294                                 self.axis_lock = "x"
 295                                 self.dir = dir
 296                                 direction_snap(self)
 297                                 break
 298                         elseif dir.z ~= 0 then
 299                                 self.axis_lock = "z"
 300                                 self.dir = dir
 301                                 direction_snap(self)
 302                                 break
 303                         end
 304                 end
 305         else
 306                 rail_brain(self,pos)
 307                 collision_detect(self)
 308         end
 309 end
 310
 311 minecart.on_rightclick = function(self,clicker)
 312         if not clicker:get_wielded_item():get_name() == "minecart:wrench" then
 313                 return
 314         end
 315         local pos = self.object:get_pos()
 316         local name = clicker:get_player_name()
 317         if not pool[name] then
 318                 if not self.coupler2 then
 319                         pool[name] = self.object
 320                         minetest.sound_play("wrench",{
 321                                 object = self.object,
 322                                 gain = 1.0,
 323                                 max_hear_distance = 64,
 324                         })
 325                         coupling_particles(pos,true)
 326                 else
 327                         minetest.sound_play("wrench",{
 328                                 object = self.object,
 329                                 gain = 1.0,
 330                                 max_hear_distance = 64,
 331                                 pitch = 0.7,
 332                         })
 333                         coupling_particles(pos,false)
 334                 end
 335         else
 336                 if not (pool[name]:get_luaentity().coupler1 and pool[name]:get_luaentity().coupler1 == self.object or self.coupler2) then
 337                         self.coupler1 = pool[name]
 338                         pool[name]:get_luaentity().coupler2 = self.object
 339                         minetest.sound_play("wrench",{
 340                                 object = self.object,
 341                                 gain = 1.0,
 342                                 max_hear_distance = 64,
 343                         })
 344                         coupling_particles(pos,true)
 345                 else
 346                         minetest.sound_play("wrench",{
 347                                 object = self.object,
 348                                 gain = 1.0,
 349                                 max_hear_distance = 64,
 350                                 pitch = 0.7,
 351                         })
 352                         coupling_particles(pos,false)
 353                 end
 354                 pool[name] = nil
 355         end
 356 end
 357
 358 --get old data
 359 minecart.on_activate = function(self,staticdata, dtime_s)
 360         self.object:set_armor_groups({immortal=1})
 361         if string.sub(staticdata, 1, string.len("return")) ~= "return" then
 362                 return
 363         end
 364         local data = minetest.deserialize(staticdata)
 365         if type(data) ~= "table" then
 366                 return
 367         end
 368         self.old_pos = self.object:get_pos()
 369         self.velocity = vector.new(0,0,0)
 370 end
 371
 372 minecart.get_staticdata = function(self)
 373         return minetest.serialize({
 374         })
 375 end
 376
 377
 378
 379 minecart.initial_properties = {
 380         physical = false, -- otherwise going uphill breaks
 381         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},
 382         visual = "mesh",
 383         mesh = "minecart.x",
 384         visual_size = {x=1, y=1},
 385         textures = {"minecart.png"},
 386 }
 387
 388
 389 minecart.on_punch = function(self,puncher, time_from_last_punch, tool_capabilities, dir, damage)
 390         --local obj = minetest.add_item(self.object:getpos(), "minecart:minecart")
 391         --self.object:remove()
 392 end
 393
 394
 395
 396 minetest.register_entity("minecart:minecart", minecart)
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409 minetest.register_craftitem("minecart:minecart", {
 410         description = "Minecart",
 411         inventory_image = "minecartitem.png",
 412         wield_image = "minecartitem.png",
 413         on_place = function(itemstack, placer, pointed_thing)
 414                 if not pointed_thing.type == "node" then
 415                         return
 416                 end
 417
 418                 local sneak = placer:get_player_control().sneak
 419                 local noddef = minetest.registered_nodes[minetest.get_node(pointed_thing.under).name]
 420                 if not sneak and noddef.on_rightclick then
 421                         minetest.item_place(itemstack, placer, pointed_thing)
 422                         return
 423                 end
 424
 425                 if minetest.get_item_group(minetest.get_node(pointed_thing.under).name, "rail")>0 then
 426                         minetest.add_entity(pointed_thing.under, "minecart:minecart")
 427                 else
 428                         return
 429                 end
 430
 431                 itemstack:take_item()
 432
 433                 return itemstack
 434         end,
 435 })
 436
 437 minetest.register_craft({
 438         output = "minecart:minecart",
 439         recipe = {
 440                 {"main:iron", "", "main:iron"},
 441                 {"main:iron", "main:iron", "main:iron"},
 442         },
 443 })
 444
 445
 446
 447
 448
 449 minetest.register_node("minecart:rail",{
 450         description = "Rail",
 451         wield_image = "rail.png",
 452         tiles = {
 453                 "rail.png", "railcurve.png",
 454                 "railt.png", "railcross.png"
 455         },
 456         drawtype = "raillike",
 457         paramtype = "light",
 458         sunlight_propagates = true,
 459         is_ground_content = false,
 460         walkable = false,
 461         node_placement_prediction = "",
 462         selection_box = {
 463                 type = "fixed",
 464                 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
 465         },
 466         sounds = main.stoneSound(),
 467         after_place_node = function(pos)
 468                 data_injection(pos,true)
 469         end,
 470         after_destruct = function(pos)
 471                 data_injection(pos)
 472         end,
 473         groups={stone=1,wood=1,rail=1,attached_node=1},
 474 })
 475
 476
 477 minetest.register_lbm({
 478         name = "minecart:rail",
 479         nodenames = {"minecart:rail"},
 480         run_at_every_load = true,
 481         action = function(pos)
 482                 data_injection(pos,true)
 483         end,
 484 })
 485
 486 minetest.register_craft({
 487         output = "minecart:rail 32",
 488         recipe = {
 489                 {"main:iron","","main:iron"},
 490                 {"main:iron","main:stick","main:iron"},
 491                 {"main:iron","","main:iron"}
 492         }
 493 })
 494
 495
 496 minetest.register_food("minecart:wrench",{
 497         description = "Train Wrench",
 498         texture = "wrench.png",
 499 })
 500
 501 minetest.register_craft({
 502         output = "minecart:wrench",
 503         recipe = {
 504                 {"main:iron", "", "main:iron"},
 505                 {"main:iron", "main:lapis", "main:iron"},
 506                 {"", "main:lapis", ""}
 507         }
 508 })