26 local function coupling_particles(pos,truth)
32 minetest.add_particlespawner({
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},
45 collisiondetection = false,
46 collision_removal = false,
48 texture = "couple_particle.png^[colorize:"..color..":200",
53 local function data_injection(pos,data)
55 pool[minetest.hash_node_position(pos)] = true
57 pool[minetest.hash_node_position(pos)] = nil
61 local function speed_limiter(self,speed)
62 local test = self.object:get_velocity()--vector.multiply(self.velocity,new_vel)
64 if test.x > speed then
66 elseif test.x < -speed then
69 if test.z > speed then
71 elseif test.z < -speed then
74 self.object:set_velocity(test)
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)
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
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)
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)
113 local function direction_snap(self)
116 if dir.y == 1 then pitch = math.pi/4 end
117 if dir.y == -1 then pitch = -math.pi/4 end
119 local yaw = minetest.dir_to_yaw(dir)
122 self.driver:set_look_vertical(pitch)
123 self.driver:set_look_horizontal(yaw)
125 self.object:set_rotation(vector.new(pitch,yaw,0))
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))
138 self.object:set_pos(pos)
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))
150 self.object:set_pos(pos)
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))
166 self.object:set_pos(pos)
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))
178 self.object:set_pos(pos)
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)
193 self.object:set_pos(pos)
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)
204 self.object:set_pos(pos)
213 local function coupling_logic(self)
215 if not self.axis_lock then return end
217 if not self.coupler1 then return end
219 if self.dir.y ~= 0 then return end
221 local pos = self.object:get_pos()
223 local pos2 = self.coupler1:get_pos()
225 local coupler_goal = self.coupler1:get_luaentity().coupler_distance
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))
235 new_vel = vector.multiply(dir,velocity)
237 new_vel = vector.multiply(velocity_real,-1)
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))
248 new_vel = vector.multiply(dir,velocity)
250 new_vel = vector.multiply(velocity_real,-1)
252 self.object:add_velocity(new_vel)
259 local function rail_brain(self,pos)
261 if not self.dir then self.dir = vector.new(0,0,0) end
263 local pos2 = self.object:get_pos()
267 speed_limiter(self,6)
269 if not pool[minetest.hash_node_position(vector.add(pos,dir))] then
271 if straight_snap(pos,self,dir) then
275 local possible_dirs = create_axis(pos)
277 if table.getn(possible_dirs) == 0 then
278 --stop slow down become physical
280 for _,dir2 in pairs(possible_dirs) do
281 if turn_snap(pos,self,dir,dir2) then
284 if climb_snap(pos,self,dir,dir2) then
297 █████╗ ██████╗ ██╗ ██████╗ ███████╗ ██████╗ ██╗███╗ ██╗
298 ██╔══██╗██╔══██╗██║ ██╔══██╗██╔════╝██╔════╝ ██║████╗ ██║
299 ███████║██████╔╝██║ ██████╔╝█████╗ ██║ ███╗██║██╔██╗ ██║
300 ██╔══██║██╔═══╝ ██║ ██╔══██╗██╔══╝ ██║ ██║██║██║╚██╗██║
301 ██║ ██║██║ ██║ ██████╔╝███████╗╚██████╔╝██║██║ ╚████║
302 ╚═╝ ╚═╝╚═╝ ╚═╝ ╚═════╝ ╚══════╝ ╚═════╝ ╚═╝╚═╝ ╚═══╝
306 function register_train(name,data)
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
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},
321 visual_size = {x=1, y=1},
322 textures = {data.texture},
326 train.on_step = function(self,dtime)
328 self.object:set_pos(self.old_pos)
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
339 elseif dir.z ~= 0 then
348 --collision_detect(self)
350 self.old_pos = self.object:get_pos()
356 train.on_punch = function(self, puncher)
357 if not puncher:get_wielded_item():get_name() == "train:wrench" then
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")
368 if self.coupler1 then
369 self.coupler1:get_luaentity().coupler2 = nil
373 if self.coupler2 then
374 self.coupler2:get_luaentity().coupler1 = nil
381 train.on_rightclick = function(self,clicker)
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,
389 max_hear_distance = 64,
391 coupling_particles(pos,true)
397 if clicker:get_wielded_item():get_name() ~= "train:wrench" then
398 if self.is_engine then
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
414 local pos = self.object:get_pos()
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,
423 max_hear_distance = 64,
425 coupling_particles(pos,true)
427 minetest.sound_play("wrench",{
428 object = self.object,
430 max_hear_distance = 64,
433 coupling_particles(pos,false)
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,
442 max_hear_distance = 64,
444 coupling_particles(pos,true)
446 minetest.sound_play("wrench",{
447 object = self.object,
449 max_hear_distance = 64,
452 coupling_particles(pos,false)
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
464 local data = minetest.deserialize(staticdata)
465 if type(data) ~= "table" then
468 self.old_pos = self.object:get_pos()
469 self.velocity = vector.new(0,0,0)
472 train.get_staticdata = function(self)
473 return minetest.serialize({
477 minetest.register_entity(name, train)
482 ███████╗███╗ ██╗██████╗
483 ██╔════╝████╗ ██║██╔══██╗
484 █████╗ ██╔██╗ ██║██║ ██║
485 ██╔══╝ ██║╚██╗██║██║ ██║
486 ███████╗██║ ╚████║██████╔╝
487 ╚══════╝╚═╝ ╚═══╝╚═════╝
493 register_train("train:steam_train",{
494 mesh = "steam_train.b3d",
495 texture = "steam_train.png",
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)
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
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)
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")
529 itemstack:take_item()
535 minetest.register_craft({
536 output = "train:train",
538 {"main:iron", "", "main:iron"},
539 {"main:iron", "main:iron", "main:iron"},
547 minetest.register_node("train:rail",{
548 description = "Rail",
549 wield_image = "rail.png",
551 "rail.png", "railcurve.png",
552 "railt.png", "railcross.png"
554 drawtype = "raillike",
556 sunlight_propagates = true,
557 is_ground_content = false,
559 node_placement_prediction = "",
562 fixed = {-1/2, -1/2, -1/2, 1/2, -1/2+1/16, 1/2},
564 sounds = main.stoneSound(),
565 after_place_node = function(pos)
566 data_injection(pos,true)
568 after_destruct = function(pos)
571 groups={stone=1,wood=1,rail=1,attached_node=1},
575 minetest.register_lbm({
577 nodenames = {"train:rail"},
578 run_at_every_load = true,
579 action = function(pos)
580 data_injection(pos,true)
584 minetest.register_craft({
585 output = "train:rail 32",
587 {"main:iron","","main:iron"},
588 {"main:iron","main:stick","main:iron"},
589 {"main:iron","","main:iron"}
594 minetest.register_food("train:wrench",{
595 description = "Train Wrench",
596 texture = "wrench.png",
599 minetest.register_craft({
600 output = "train:wrench",
602 {"main:iron", "", "main:iron"},
603 {"main:iron", "main:lapis", "main:iron"},
604 {"", "main:lapis", ""}
610 minetest.register_entity("train:furnace", {
611 initial_properties = {
612 visual = "wielditem",
613 visual_size = {x = 0.6, y = 0.6},
617 collide_with_objects = false,
619 collisionbox = {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
621 set_node = function(self)
622 self.object:set_properties({
624 textures = {"utility:furnace"},
629 on_activate = function(self, staticdata)
630 self.object:set_armor_groups({immortal = 1})