aboutsummaryrefslogtreecommitdiff
path: root/wagons.lua
blob: 398f42d9f1041344c367ffef532fc74a2dea5f2a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
--atan2 counts angles clockwise, minetest does counterclockwise
--local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) end
local print=function() end

local wagon={
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	--physical = true,
	visual = "mesh",
	mesh = "wagon.b3d",
	visual_size = {x=3, y=3},
	textures = {"black.png"},
	is_wagon=true,
	wagon_span=1,--how many index units of space does this wagon consume
	has_inventory=false,
}



function wagon:on_rightclick(clicker)
	if not self:ensure_init() then return end
	if not clicker or not clicker:is_player() then
		return
	end
	if clicker:get_player_control().aux1 then
		--advtrains.dumppath(self:train().path)
		--minetest.chat_send_all("at index "..(self:train().index or "nil"))
		--advtrains.invert_train(self.train_id)
		minetest.chat_send_all(dump(self:train()))
		return
	end	
	local no=self:get_seatno(clicker:get_player_name())
	if no then
		self:get_off(no)
	else
		self:show_get_on_form(clicker:get_player_name())
	end
end

function wagon:train()
	return advtrains.trains[self.train_id]
end

--[[about 'initalized':
	when initialized is false, the entity hasn't got any data yet and should wait for these to be set before doing anything
	when loading an existing object (with staticdata), it will be set
	when instanciating a new object via add_entity, it is not set at the time on_activate is called.
	then, wagon:initialize() will be called
	
	wagon will save only uid in staticdata, no serialized table
]]
function wagon:on_activate(sd_uid, dtime_s)
	print("[advtrains][wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] activated")
	self.object:set_armor_groups({immortal=1})
	if sd_uid and sd_uid~="" then
		--legacy
		--expect this to be a serialized table and handle
		if minetest.deserialize(sd_uid) then
			self:init_from_wagon_save(minetest.deserialize(sd_uid).unique_id)
		else
			self:init_from_wagon_save(sd_uid)
		end
	end
	self.entity_name=self.name
	
	--duplicates?
	for ao_id,wagon in pairs(minetest.luaentities) do
		if wagon.is_wagon and wagon.initialized and wagon.unique_id==self.unique_id and wagon~=self then--i am a duplicate!
			print("[advtrains][wagon "..((sd_uid and sd_uid~="" and sd_uid) or "no-id").."] duplicate found(ao_id:"..ao_id.."), removing")
			self.object:remove()
			minetest.after(0.5, function() advtrains.update_trainpart_properties(self.train_id) end)
			return
		end
	end
	
	if self.custom_on_activate then
		self:custom_on_activate(staticdata_table, dtime_s)
	end
end

function wagon:get_staticdata()
	if not self:ensure_init() then return end
	print("[advtrains][wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: saving to wagon_save")
	--serialize inventory, if it has one
	if self.has_inventory then
		local inv=minetest.get_inventory({type="detached", name="advtrains_wgn_"..self.unique_id})
		self.ser_inv=advtrains.serialize_inventory(inv)
	end
	--save to table before being unloaded
	advtrains.wagon_save[self.unique_id]=advtrains.merge_tables(self)
	advtrains.wagon_save[self.unique_id].entity_name=self.name
	advtrains.wagon_save[self.unique_id].name=nil
	advtrains.wagon_save[self.unique_id].object=nil
	return self.unique_id
end
--returns: uid of wagon
function wagon:init_new_instance(train_id, properties)
	self.unique_id=os.time()..os.clock()
	self.train_id=train_id
	for k,v in pairs(properties) do
		if k~="name" and k~="object" then
			self[k]=v
		end
	end
	self:init_shared()
	self.initialized=true
	print("init_new_instance "..self.unique_id.." ("..self.train_id..")")
	return self.unique_id
end
function wagon:init_from_wagon_save(uid)
	if not advtrains.wagon_save[uid] then
		self.object:remove()
		return
	end
	self.unique_id=uid
	for k,v in pairs(advtrains.wagon_save[uid]) do
		if k~="name" and k~="object" then
			self[k]=v
		end
	end
	if not self.train_id or not self:train() then
		self.object:remove()
		return
	end
	self:init_shared()
	self.initialized=true
	minetest.after(1, function() self:reattach_all() end)
	print("init_from_wagon_save "..self.unique_id.." ("..self.train_id..")")
	advtrains.update_trainpart_properties(self.train_id)
end
function wagon:init_shared()
	if self.has_inventory then
		local uid_noptr=self.unique_id..""
		--to be used later
		local inv=minetest.create_detached_inventory("advtrains_wgn_"..self.unique_id, {
			allow_move = function(inv, from_list, from_index, to_list, to_index, count, player)
				return count
			end,
			allow_put = function(inv, listname, index, stack, player)
				return stack:get_count()
			end,
			allow_take = function(inv, listname, index, stack, player)
				return stack:get_count()
			end
		})
		if self.ser_inv then
			advtrains.deserialize_inventory(self.ser_inv, inv)
		end
		if self.inventory_list_sizes then
			for lst, siz in pairs(self.inventory_list_sizes) do
				inv:set_size(lst, siz)
			end
		end
	end
end
function wagon:ensure_init()
	if self.initialized then return true end
	self.object:setvelocity({x=0,y=0,z=0})
	return false
end

-- Remove the wagon
function wagon:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
	if not self:ensure_init() then return end
	if not puncher or not puncher:is_player() then
		return
	end
	if self.owner and puncher:get_player_name()~=self.owner then
		minetest.chat_send_player(puncher:get_player_name(), "This wagon is owned by "..self.owner..", you can't destroy it.")
		return
	end
	
	if minetest.setting_getbool("creative_mode") then
		if not self:destroy() then return end
		
		local inv = puncher:get_inventory()
		if not inv:contains_item("main", self.name) then
			inv:add_item("main", self.name)
		end
	else
		local pc=puncher:get_player_control()
		if not pc.sneak then
			minetest.chat_send_player(puncher:get_player_name(), "Warning: If you destroy this wagon, you only get some steel back! If you are sure, shift-leftclick the wagon.")
			return
		end

		if not self:destroy() then return end

		local inv = puncher:get_inventory()
		for _,item in ipairs(self.drops or {self.name}) do
			inv:add_item("main", item)
		end
	end
end
function wagon:destroy()
	--some rules:
	-- you get only some items back
	-- single left-click shows warning
	-- shift leftclick destroys
	-- not when a driver is inside
	
	for _,_ in pairs(self.seatp) do
		return
	end
	
	if self.custom_may_destroy then
		if not self.custom_may_destroy(self, puncher, time_from_last_punch, tool_capabilities, direction) then
			return
		end
	end
	if self.custom_on_destroy then
		self.custom_on_destroy(self, puncher, time_from_last_punch, tool_capabilities, direction)
	end
	
	print("[advtrains][wagon "..((self.unique_id and self.unique_id~="" and self.unique_id) or "no-id").."]: destroying")
	
	self.object:remove()

	table.remove(self:train().trainparts, self.pos_in_trainparts)
	advtrains.update_trainpart_properties(self.train_id)
	advtrains.wagon_save[self.unique_id]=nil
	if self.discouple then self.discouple.object:remove() end--will have no effect on unloaded objects
	return true
end


function wagon:on_step(dtime)
	if not self:ensure_init() then return end
	
	local t=os.clock()
	local pos = self.object:getpos()
	
	if not pos then
		print("["..self.unique_id.."][fatal] missing position (object:getpos() returned nil)")
		return
	end

	self.entity_name=self.name
	
	--is my train still here
	if not self.train_id or not self:train() then
		print("[advtrains][wagon "..self.unique_id.."] missing train_id, destroying")
		self.object:remove()
		return
	elseif not self.initialized then
		self.initialized=true
	end
	if not self.seatp then
		self.seatp={}
	end

	--custom on_step function
	if self.custom_on_step then
		self:custom_on_step(self, dtime)
	end

	--driver control
	for seatno, seat in ipairs(self.seats) do
		if seat.driving_ctrl_access then
			local driver=self.seatp[seatno] and minetest.get_player_by_name(self.seatp[seatno])
			if driver and driver:get_player_control_bits()~=self.old_player_control_bits then
				local pc=driver:get_player_control()
				if pc.sneak then --stop
					self:train().tarvelocity=0
				elseif (not self.wagon_flipped and pc.up) or (self.wagon_flipped and pc.down) then --faster
					self:train().tarvelocity=math.min(self:train().tarvelocity+1, advtrains.all_traintypes[self:train().traintype].max_speed or 10)
				elseif (not self.wagon_flipped and pc.down) or (self.wagon_flipped and pc.up) then --slower
					self:train().tarvelocity=math.max(self:train().tarvelocity-1, -(advtrains.all_traintypes[self:train().traintype].max_speed or 10))
				elseif pc.aux1 then --slower
					if true or math.abs(self:train().velocity)<=3 then--TODO debug
						self:get_off(seatno)
						return
					else
						minetest.chat_send_player(driver:get_player_name(), "Can't get off driving train!")
					end
				end
				self.old_player_control_bits=driver:get_player_control_bits()
			end
			if driver then
				advtrains.set_trainhud(driver:get_player_name(), advtrains.hud_train_format(self:train(), self.wagon_flipped))
			end
		end
	end

	local gp=self:train()

	--DisCouple
	if self.pos_in_trainparts and self.pos_in_trainparts>1 then
		if gp.velocity==0 then
			if not self.discouple or not self.discouple.object:getyaw() then
				local object=minetest.add_entity(pos, "advtrains:discouple")
				if object then
					local le=object:get_luaentity()
					le.wagon=self
					--box is hidden when attached, so unuseful.
					--object:set_attach(self.object, "", {x=0, y=0, z=self.wagon_span*10}, {x=0, y=0, z=0})
					self.discouple=le
				else
					print("Couldn't spawn DisCouple")
				end
			end
		else
			if self.discouple and self.discouple.object:getyaw() then
				self.discouple.object:remove()
			end
		end
	end
	--for path to be available. if not, skip step
	if not advtrains.get_or_create_path(self.train_id, gp) then
		self.object:setvelocity({x=0, y=0, z=0})
		return
	end
	if not self.pos_in_train then
		print("["..self.unique_id.."][fatal] no pos_in_train set.")
		return
	end
	
	local index=advtrains.get_real_path_index(self:train(), self.pos_in_train)
	--print("trainindex "..gp.index.." wagonindex "..index)
	
	--position recalculation
	local first_pos=gp.path[math.floor(index)]
	local second_pos=gp.path[math.floor(index)+1]
	if not first_pos or not second_pos then
		--print("[advtrains] object "..self.unique_id.." path end reached!")
		self.object:setvelocity({x=0,y=0,z=0})
		return
	end
	
	--checking for environment collisions(a 3x3 cube around the center)
	if not gp.recently_collided_with_env then
		local collides=false
		for x=-1,1 do
			for y=0,2 do
				for z=-1,1 do
					local node=minetest.get_node_or_nil(vector.add(first_pos, {x=x, y=y, z=z}))
					if (advtrains.train_collides(node)) then
						collides=true
					end
				end
			end
		end
		if collides then
			gp.recently_collided_with_env=true
			gp.velocity=-0.5*gp.velocity
			gp.tarvelocity=0
		end
	end
	
	--FIX: use index of the wagon, not of the train.
	local velocity=gp.velocity/(gp.path_dist[math.floor(index)] or 1)
	local acceleration=(gp.last_accel or 0)/(gp.path_dist[math.floor(index)] or 1)
	local factor=index-math.floor(index)
	local actual_pos={x=first_pos.x-(first_pos.x-second_pos.x)*factor, y=first_pos.y-(first_pos.y-second_pos.y)*factor, z=first_pos.z-(first_pos.z-second_pos.z)*factor,}
	local velocityvec={x=(first_pos.x-second_pos.x)*velocity*-1, z=(first_pos.z-second_pos.z)*velocity*-1, y=(first_pos.y-second_pos.y)*velocity*-1}
	local accelerationvec={x=(first_pos.x-second_pos.x)*acceleration*-1, z=(first_pos.z-second_pos.z)*acceleration*-1, y=(first_pos.y-second_pos.y)*acceleration*-1}
	
	--some additional positions to determine orientation
	local aposfwd=gp.path[math.floor(index+2)]
	local aposbwd=gp.path[math.floor(index-1)]
	
	local yaw
	if aposfwd and aposbwd then
		yaw=advtrains.get_wagon_yaw(aposfwd, second_pos, first_pos, aposbwd, factor)+math.pi--TODO remove when cleaning up
	else
		yaw=math.atan2((first_pos.x-second_pos.x), (second_pos.z-first_pos.z))
	end
	if self.wagon_flipped then
		yaw=yaw+math.pi
	end
	
	self.updatepct_timer=(self.updatepct_timer or 0)-dtime
	if not self.old_velocity_vector 
			or not vector.equals(velocityvec, self.old_velocity_vector)
			or not self.old_acceleration_vector 
			or not vector.equals(accelerationvec, self.old_acceleration_vector)
			or self.old_yaw~=yaw
			or self.updatepct_timer<=0 then--only send update packet if something changed
			self.object:setpos(actual_pos)
		self.object:setvelocity(velocityvec)
		self.object:setacceleration(accelerationvec)
		self.object:setyaw(yaw)
		self.updatepct_timer=2
		if self.update_animation then
			self:update_animation(gp.velocity)
		end
	end
	
	
	self.old_velocity_vector=velocityvec
	self.old_acceleration_vector=accelerationvec
	self.old_yaw=yaw
	printbm("wagon step", t)
end

function advtrains.get_real_path_index(train, pit)
	local pos_in_train_left=pit
	local index=train.index
	if pos_in_train_left>(index-math.floor(index))*(train.path_dist[math.floor(index)] or 1) then
		pos_in_train_left=pos_in_train_left - (index-math.floor(index))*(train.path_dist[math.floor(index)] or 1)
		index=math.floor(index)
		while pos_in_train_left>(train.path_dist[index-1] or 1) do
			pos_in_train_left=pos_in_train_left - (train.path_dist[index-1] or 1)
			index=index-1
		end
		index=index-(pos_in_train_left/(train.path_dist[index-1] or 1))
	else
		index=index-(pos_in_train_left/(train.path_dist[math.floor(index-1)] or 1))
	end
	return index
end

function wagon:get_on(clicker, seatno)
	if not self.seatp then
		self.seatp={}
	end
	if not self.seats[seatno] then return end
	if self.seatp[seatno] then
		self:get_off(seatno)
	end
	self.seatp[seatno] = clicker:get_player_name()
	advtrains.player_to_wagon_mapping[clicker:get_player_name()]={wagon=self, seatno=seatno}
	clicker:set_attach(self.object, "", self.seats[seatno].attach_offset, {x=0,y=0,z=0})
	clicker:set_eye_offset(self.seats[seatno].view_offset, self.seats[seatno].view_offset)
end
function wagon:get_off_plr(pname)
	local no=self:get_seatno(pname)
	if no then
		self:get_off(no)
	end
end
function wagon:get_seatno(pname)
	for no, cont in ipairs(self.seatp) do
		if cont==pname then
			return no
		end
	end
	return nil
end
function wagon:get_off(seatno)
	if not self.seatp[seatno] then return end
	local pname = self.seatp[seatno]
	local clicker = minetest.get_player_by_name(pname)
	advtrains.player_to_wagon_mapping[pname]=nil
	advtrains.set_trainhud(pname, "")
	if clicker then
		clicker:set_detach()
		clicker:set_eye_offset({x=0,y=0,z=0}, {x=0,y=0,z=0})
	end
	self.seatp[seatno]=nil
end
function wagon:show_get_on_form(pname)
	if not self.initialized then return end
	if #self.seats==0 then
		if self.has_inventory and self.get_inventory_formspec then
			minetest.show_formspec(pname, "advtrains_inv_"..self.unique_id, self:get_inventory_formspec())
		end
		return
	end
	local form, comma="size[5,8]label[0.5,0.5;Select seat:]textlist[0.5,1;4,6;seat;", ""
	for seatno, seattbl in ipairs(self.seats) do
		local addtext, colorcode="", ""
		if self.seatp and self.seatp[seatno] then
			colorcode="#FF0000"
			addtext=" ("..self.seatp[seatno]..")"
		end
		form=form..comma..colorcode..seattbl.name..addtext
		comma=","
	end
	form=form..";0,false]"
	if self.has_inventory and self.get_inventory_formspec then
		form=form.."button_exit[1,7;3,1;inv;Show Inventory]"
	end
	minetest.show_formspec(pname, "advtrains_geton_"..self.unique_id, form)
end
minetest.register_on_player_receive_fields(function(player, formname, fields)
	local uid=string.match(formname, "^advtrains_geton_(.+)$")
	if uid then
		for _,wagon in pairs(minetest.luaentities) do
			if wagon.is_wagon and wagon.initialized and wagon.unique_id==uid then
				if fields.inv then
					if wagon.has_inventory and wagon.get_inventory_formspec then
						minetest.show_formspec(player:get_player_name(), "advtrains_inv_"..uid, wagon:get_inventory_formspec())
					end
				elseif fields.seat then
					local val=minetest.explode_textlist_event(fields.seat)
					if val and val.type~="INV" then
					--get on
						wagon:get_on(player, val.index)
						minetest.show_formspec(player:get_player_name(), "none", "")
					end
				end
			end
		end
	end
end)
function wagon:reattach_all()
	if not self.seatp then self.seatp={} end
	for seatno, pname in pairs(self.seatp) do
		local p=minetest.get_player_by_name(pname)
		if p then
			self:get_on(p ,seatno)
		end
	end
end
minetest.register_on_joinplayer(function(player)
	for _,wagon in pairs(minetest.luaentities) do
		if wagon.is_wagon and wagon.initialized then
			wagon:reattach_all()
		end
	end
end)

function advtrains.register_wagon(sysname, traintype, prototype, desc, inv_img)
	setmetatable(prototype, {__index=wagon})
	minetest.register_entity("advtrains:"..sysname,prototype)
	
	minetest.register_craftitem("advtrains:"..sysname, {
		description = desc,
		inventory_image = inv_img,
		wield_image = inv_img,
		stack_max = 1,
		
		on_place = function(itemstack, placer, pointed_thing)
			if not pointed_thing.type == "node" then
				return
			end
			
			local node=minetest.env:get_node_or_nil(pointed_thing.under)
			if not node then print("[advtrains]Ignore at placer position") return itemstack end
			local nodename=node.name
			if(not advtrains.is_track_and_drives_on(nodename, advtrains.all_traintypes[traintype].drives_on)) then
				print("[advtrains]no track here, not placing.")
				return itemstack
			end
			local conn1=advtrains.get_track_connections(node.name, node.param2)
			local id=advtrains.create_new_train_at(pointed_thing.under, advtrains.dirCoordSet(pointed_thing.under, conn1), traintype)
			
			local ob=minetest.env:add_entity(pointed_thing.under, "advtrains:"..sysname)
			if not ob then
				print("[advtrains]couldn't add_entity, aborting")
			end
			local le=ob:get_luaentity()
			
			le.owner=placer:get_player_name()
			le.infotext=desc..", owned by "..placer:get_player_name()
			
			local wagon_uid=le:init_new_instance(id, {})
			
			advtrains.add_wagon_to_train(le, id)
			if not minetest.setting_getbool("creative_mode") then
				itemstack:take_item()
			end
			return itemstack
			
		end,
	})
end
advtrains.register_train_type("steam", {"regular", "default"})

--[[advtrains.register_wagon("blackwagon", "steam",{textures = {"black.png"}})
advtrains.register_wagon("bluewagon", "steam",{textures = {"blue.png"}})
advtrains.register_wagon("greenwagon", "steam",{textures = {"green.png"}})
advtrains.register_wagon("redwagon", "steam",{textures = {"red.png"}})
advtrains.register_wagon("yellowwagon", "steam",{textures = {"yellow.png"}})
]]

--[[
	wagons can define update_animation(self, velocity) if they have a speed-dependent animation
	this function will be called when the velocity vector changes or every 2 seconds.
]]
advtrains.register_wagon("newlocomotive", "steam",{
	mesh="advtrains_engine_steam.b3d",
	textures = {"advtrains_newlocomotive.png"},
	is_locomotive=true,
	seats = {
		{
			name="Driver Stand (left)",
			attach_offset={x=-5, y=10, z=-10},
			view_offset={x=0, y=6, z=0},
			driving_ctrl_access=true,
		},
		{
			name="Driver Stand (right)",
			attach_offset={x=5, y=10, z=-10},
			view_offset={x=0, y=6, z=0},
			driving_ctrl_access=true,
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=1.85,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	update_animation=function(self, velocity)
		--if self.old_anim_velocity~=advtrains.abs_ceil(velocity) then
			self.object:set_animation({x=1,y=60}, 100)--math.floor(velocity))
			--self.old_anim_velocity=advtrains.abs_ceil(velocity)
		--end
	end,
	custom_on_activate = function(self, staticdata_table, dtime_s)
		minetest.add_particlespawner({
			amount = 10,
			time = 0,
		--  ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
			minpos = {x=0, y=2, z=1.2},
			maxpos = {x=0, y=2, z=1.2},
			minvel = {x=-0.2, y=1.8, z=-0.2},
			maxvel = {x=0.2, y=2, z=0.2},
			minacc = {x=0, y=-0.1, z=0},
			maxacc = {x=0, y=-0.3, z=0},
			minexptime = 2,
			maxexptime = 4,
			minsize = 1,
			maxsize = 5,
		--  ^ The particle's properties are random values in between the bounds:
		--  ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
		--  ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
			collisiondetection = true,
		--  ^ collisiondetection: if true uses collision detection
			vertical = false,
		--  ^ vertical: if true faces player using y axis only
			texture = "smoke_puff.png",
		--  ^ Uses texture (string)
			attached = self.object,
		})
	end,
	drops={"default:steelblock 4"},
}, "Steam Engine", "advtrains_newlocomotive_inv.png")
advtrains.register_wagon("wagon_default", "steam",{
	mesh="advtrains_wagon.b3d",
	textures = {"advtrains_wagon.png"},
	seats = {
		{
			name="Default Seat",
			attach_offset={x=0, y=10, z=0},
			view_offset={x=0, y=6, z=0},
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=1.8,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
}, "Passenger Wagon", "advtrains_wagon_inv.png")
advtrains.register_wagon("wagon_box", "steam",{
	mesh="advtrains_wagon.b3d",
	textures = {"advtrains_wagon_box.png"},
	seats = {},
	visual_size = {x=1, y=1},
	wagon_span=1.8,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
	has_inventory = true,
	get_inventory_formspec = function(self)
		return "size[8,11]"..
			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
			"list[current_player;main;0,7;8,4;]"..
			"listring[]"
	end,
	inventory_list_sizes = {
		box=8*6,
	},
}, "Box Wagon", "advtrains_wagon_box_inv.png")

advtrains.register_train_type("electric", {"regular", "default"}, 20)

advtrains.register_wagon("engine_japan", "electric",{
	mesh="advtrains_engine_japan.b3d",
	textures = {"advtrains_engine_japan.png"},
	seats = {
		{
			name="Default Seat (driver stand)",
			attach_offset={x=0, y=10, z=0},
			view_offset={x=0, y=6, z=0},
			driving_ctrl_access=true,
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=2.4,
	is_locomotive=true,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
}, "Japanese Train Engine", "green.png")

advtrains.register_wagon("wagon_japan", "electric",{
	mesh="advtrains_wagon_japan.b3d",
	textures = {"advtrains_wagon_japan.png"},
	seats = {
		{
			name="Default Seat",
			attach_offset={x=0, y=10, z=0},
			view_offset={x=0, y=6, z=0},
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=2.4,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
}, "Japanese Train Wagon", "blue.png")

advtrains.register_wagon("engine_industrial", "electric",{
	mesh="advtrains_engine_industrial.b3d",
	textures = {"advtrains_engine_industrial.png"},
	seats = {
		{
			name="Driver Stand (left)",
			attach_offset={x=-5, y=10, z=-10},
			view_offset={x=0, y=10, z=0},
			driving_ctrl_access=true,
		},
		{
			name="Driver Stand (right)",
			attach_offset={x=5, y=10, z=-10},
			view_offset={x=0, y=10, z=0},
			driving_ctrl_access=true,
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=2.6,
	is_locomotive=true,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
}, "Industrial Train Engine", "advtrains_engine_industrial_inv.png")
advtrains.register_wagon("wagon_tank", "electric",{
	mesh="advtrains_wagon_tank.b3d",
	textures = {"advtrains_wagon_tank.png"},
	seats = {},
	visual_size = {x=1, y=1},
	wagon_span=1.8,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
	has_inventory = true,
	get_inventory_formspec = function(self)
		return "size[8,11]"..
			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
			"list[current_player;main;0,7;8,4;]"..
			"listring[]"
	end,
	inventory_list_sizes = {
		box=8*6,
	},
}, "Industrial tank wagon", "advtrains_wagon_tank_inv.png")
advtrains.register_wagon("wagon_wood", "electric",{
	mesh="advtrains_wagon_wood.b3d",
	textures = {"advtrains_wagon_wood.png"},
	seats = {},
	visual_size = {x=1, y=1},
	wagon_span=1.8,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
	has_inventory = true,
	get_inventory_formspec = function(self)
		return "size[8,11]"..
			"list[detached:advtrains_wgn_"..self.unique_id..";box;0,0;8,6;]"..
			"list[current_player;main;0,7;8,4;]"..
			"listring[]"
	end,
	inventory_list_sizes = {
		box=8*6,
	},
}, "Industrial wood wagon", "advtrains_wagon_wood_inv.png")

advtrains.register_train_type("subway", {"default"}, 15)

advtrains.register_wagon("subway_wagon", "subway",{
	mesh="advtrains_subway_train.b3d",
	textures = {"advtrains_subway_train.png"},
	seats = {
		{
			name="Default Seat (driver stand)",
			attach_offset={x=0, y=10, z=0},
			view_offset={x=0, y=6, z=0},
			driving_ctrl_access=true,
		},
	},
	visual_size = {x=1, y=1},
	wagon_span=1.8,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	is_locomotive=true,
	drops={"default:steelblock 4"},
}, "Subway Passenger Wagon", "advtrains_subway_train_inv.png")