aboutsummaryrefslogtreecommitdiff
path: root/wagons.lua
blob: 66c0411694a39dbe4d3985de1296f3a8771f0c5a (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
--atan2 counts angles clockwise, minetest does counterclockwise
local print=function(t) minetest.log("action", t) minetest.chat_send_all(t) 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
	attach_offset={x=0, y=0, z=0},
	view_offset={x=0, y=0, z=0},
}



function wagon:on_rightclick(clicker)
	--print("[advtrains] wagon rightclick")
	if not clicker or not clicker:is_player() then
		return
	end
	if not self.initialized then
		print("[advtrains] not initiaalized")
		return
	end
	if clicker:get_player_control().sneak then
		advtrains.split_train_at_wagon(self)
		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	
	if self.driver and clicker == self.driver then
		advtrains.player_to_wagon_mapping[self.driver:get_player_name()]=nil
		advtrains.set_trainhud(self.driver:get_player_name(), "")
		self.driver = nil
		self.driver_name = nil
		clicker:set_detach()
		clicker:set_eye_offset({x=0,y=0,z=0}, {x=0,y=0,z=0})
	elseif not self.driver then
		self.driver = clicker
		advtrains.player_to_wagon_mapping[clicker:get_player_name()]=self
		clicker:set_attach(self.object, "", self.attach_offset, {x=0,y=0,z=0})
		clicker:set_eye_offset(self.view_offset, self.view_offset)
	end
end

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

function wagon:on_activate(staticdata, dtime_s)
	--print("[advtrains][wagon "..(self.unique_id or "no-id").."] activated")
	self.object:set_armor_groups({immortal=1})
	if staticdata then
		local tmp = minetest.deserialize(staticdata)
		if tmp then
			self.unique_id=tmp.unique_id
			self.train_id=tmp.train_id
			self.wagon_flipped=tmp.wagon_flipped
			self.owner=tmp.owner
		end

	end
	self.old_pos = self.object:getpos()
	self.old_velocity = self.velocity
	self.initialized_pre=true
	self.entity_name=self.name
	
	--same code is in on_step
	--does this object already have an ID?
	if not self.unique_id then
		self.unique_id=os.time()..os.clock()--should be random enough.
	else
		for _,wagon in pairs(minetest.luaentities) do
			if wagon.is_wagon and wagon.initialized and wagon.unique_id==self.unique_id then--i am a duplicate!
				self.object:remove()
				return
			end
		end
	end
	--is my train still here
	if not self.train_id or not self:train() then
		if self.initialized then
			print("[advtrains][wagon "..self.unique_id.."] missing train_id, destroying")
			self.object:remove()
			return
		end
		print("[advtrains][wagon "..self.unique_id.."] missing train_id, but not yet initialized, returning")
		return
	elseif not self.initialized then
		self.initialized=true
	end
	advtrains.update_trainpart_properties(self.train_id)
end

function wagon:get_staticdata()
	--save to table before being unloaded
	advtrains.wagon_save[self.unique_id]=advtrains.merge_tables(self)
	return minetest.serialize({
		unique_id=self.unique_id,
		train_id=self.train_id,
		wagon_flipped=self.wagon_flipped,
		owner=self.owner,
	})
end

-- Remove the wagon
function wagon:on_punch(puncher, time_from_last_punch, tool_capabilities, direction)
	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
		self:destroy()
		
		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

		self:destroy()

		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
	if self.driver then return false 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
	
	self.object:remove()

	if not self.initialized then return end

	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
end


function wagon:on_step(dtime)
	local t=os.clock()
	local pos = self.object:getpos()
	if not self.initialized_pre then 
		print("[advtrains] wagon stepping while not yet initialized_pre, returning")
		self.object:setvelocity({x=0,y=0,z=0})
		return
	end

	self.entity_name=self.name
	--does this object already have an ID?
	if not self.unique_id then
		self.unique_id=os.time()..os.clock()--should be random enough.
	end
	--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

	--re-attach driver if he got lost
	if not self.driver and self.driver_name then
		local clicker=minetest.get_player_by_name(self.driver_name)
		if clicker then
			self.driver = clicker
			advtrains.player_to_wagon_mapping[clicker:get_player_name()]=self
			clicker:set_attach(self.object, "", self.attach_offset, {x=0,y=0,z=0})
			clicker:set_eye_offset(self.view_offset, self.view_offset)
		end
	end

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

	--driver control
	if self.driver and self.is_locomotive then
		if self.driver:get_player_control_bits()~=self.old_player_control_bits then
			local pc=self.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
					advtrains.player_to_wagon_mapping[self.driver:get_player_name()]=nil
					self.driver:set_detach()
					self.driver:set_eye_offset({x=0,y=0,z=0}, {x=0,y=0,z=0})
					advtrains.set_trainhud(self.driver:get_player_name(), "")
					self.driver = nil
					self.driver_name = nil
					return--(don't let it crash because of statement below)
				else
					minetest.chat_send_player(self.driver:get_player_name(), "Can't get off driving train!")
				end
			end
			self.old_player_control_bits=self.driver:get_player_control_bits()
		end
		advtrains.set_trainhud(self.driver:get_player_name(), advtrains.hud_train_format(self:train(), self.wagon_flipped))
	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
	
	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 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 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 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 trck 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)
			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,
	attach_offset={x=5, y=10, z=-10},
	view_offset={x=0, y=6, z=0},
	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,
	drops={"default:steelblock 4"},
}, "Steam Engine", "advtrains_newlocomotive_inv.png")
advtrains.register_wagon("wagon_default", "steam",{
	mesh="wagon.b3d",
	textures = {"advtrains_wagon.png"},
	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_train_type("electric", {"regular", "default"}, 20)

advtrains.register_wagon("engine_japan", "electric",{
	mesh="advtrains_engine_japan.b3d",
	textures = {"advtrains_engine_japan.png"},
	attach_offset={x=0, y=10, z=10},
	view_offset={x=0, y=6, z=0},
	visual_size = {x=1, y=1},
	wagon_span=2,
	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"},
	attach_offset={x=0, y=10, z=10},
	view_offset={x=0, y=6, z=0},
	visual_size = {x=1, y=1},
	wagon_span=2,
	collisionbox = {-1.0,-0.5,-1.0, 1.0,2.5,1.0},
	drops={"default:steelblock 4"},
}, "Japanese Train Wagon", "blue.png")


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

advtrains.register_wagon("subway_wagon", "subway",{
	mesh="advtrains_subway_train.b3d",
	textures = {"advtrains_subway_train.png"},
	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},
	is_locomotive=true,
	drops={"default:steelblock 4"},
}, "Subway Passenger Wagon", "advtrains_subway_train_inv.png")
--[[
advtrains.register_wagon("wagontype1",{on_rightclick=function(self, clicker)
	if clicker:get_player_control().sneak then
		advtrains.disconnect_train_before_wagon(self)
		return
	end
	--just debugging. look for first active wagon and attach to it.
	for _,v in pairs(minetest.luaentities) do
		if v.is_wagon and v.unique_id and v.unique_id~=self.unique_id then
			self.train_id=v.unique_id
		end
	end
	if not self.train_id then minetest.chat_send_all("not found") return end
	minetest.chat_send_all(self.train_id.." found and attached.")
end})
]]