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authorKahrl <kahrl@gmx.net>2013-08-02 21:31:52 +0200
committerPilzAdam <pilzadam@minetest.net>2013-08-05 01:52:09 +0200
commit96c34d369e71e25299eccc1527ae5463ea5219e3 (patch)
tree5ac5e757afde29af840ca4abc862575a15006dba /src/gettime.h
parent2336d21efd659d0f47abde26f906b5fbb26b1d65 (diff)
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Fix crack overlay for animated textures
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--couple.lua
--defines couple entities.

--advtrains:discouple
--set into existing trains to split them when punched.
--they are attached to the wagons.
--[[fields
wagon

wagons keep their couple entity minetest-internal id inside the field discouple_id. if it refers to nowhere, they will spawn a new one if player is near
]]


minetest.register_entity("advtrains:discouple", {
	visual="sprite",
	textures = {"advtrains_discouple.png"},
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	visual_size = {x=1, y=1},
	initial_sprite_basepos = {x=0, y=0},
	
	is_discouple=true,
	on_activate=function(self, staticdata) 
		if staticdata=="DISCOUPLE" then
			--couple entities have no right to exist further...
			self.object:remove()
			return
		end
		self.object:set_armor_groups({immortal=1})
	end,
	get_staticdata=function() return "DISCOUPLE" end,
	on_punch=function(self, player)
		--only if player owns at least one wagon next to this
		local own=player:get_player_name()
		if self.wagon.owner and self.wagon.owner==own then
			local train=advtrains.trains[self.wagon.train_id]
			local nextwgn_id=train.trainparts[self.wagon.pos_in_trainparts-1]
			for aoi, le in pairs(minetest.luaentities) do
				if le and le.is_wagon then
					if le.unique_id==nextwgn_id then
						if le.owner and le.owner~=own then
							minetest.chat_send_player(own, "You need to own at least one neighboring wagon to destroy this couple.")
							return
						end
					end
				end
			end
			advtrains.split_train_at_wagon(self.wagon)--found in trainlogic.lua
			self.object:remove()
		else
			minetest.chat_send_player(own, "You need to own at least one neighboring wagon to destroy this couple.")
		end
	end,
	on_step=function(self, dtime)
		local t=os.clock()
		if not self.wagon then
			self.object:remove()
			return
		end
		--getyaw seems to be a reliable method to check if an object is loaded...if it returns nil, it is not.
		if not self.wagon.object:getyaw() then
			self.object:remove()
			return
		end
		local velocityvec=self.wagon.object:getvelocity()
		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 self.updatepct_timer<=0 then--only send update packet if something changed
			local flipsign=self.wagon.wagon_flipped and -1 or 1
			self.object:setpos(vector.add(self.wagon.object:getpos(), {y=0, x=-math.sin(self.wagon.object:getyaw())*self.wagon.wagon_span*flipsign, z=math.cos(self.wagon.object:getyaw())*self.wagon.wagon_span*flipsign}))
			self.object:setvelocity(velocityvec)
			self.updatepct_timer=2
		end
		printbm("discouple_step", t)
	end,
})

--advtrains:couple
--when two trains overlap with their end-positions, this entity will be spawned and both trains set its id into appropiate fields for them to know when to free them again. The entity will destroy automatically when it recognizes that any of the trains left the common position. 
--[[fields
train_id_1
train_id_2
train1_is_backpos
train2_is_backpos
]]


minetest.register_entity("advtrains:couple", {
	visual="sprite",
	textures = {"advtrains_couple.png"},
	collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
	visual_size = {x=1, y=1},
	initial_sprite_basepos = {x=0, y=0},