Implement cable melting

api/network.lua

@@ -41,6 +41,102 @@ local function clampFlow(pos,flow)
 	return math.min(flow,newFlow)
 end
 
+-- \brief Finds path from pos to dest in network. Function finished if either dest is found or every node was visited
+-- \param pos Vector
+-- \param dest Vector
+-- \returns table or nil
+function industrialtest.api.findPathInNetwork(pos,dest)
+	local connections=industrialtest.api.getConnections(pos,"i")
+	if #connections==0 then
+		return nil
+	end
+
+	local workers={}
+	local serializedSourcePos=pos.x..","..pos.y..","..pos.z
+	local visitedNodes={[serializedSourcePos]=true}
+	for _,conn in ipairs(connections) do
+		local sideVector=vector.subtract(conn,pos)
+		table.insert(workers,{
+			position=conn,
+			direction=sideVector,
+			path={[1]=conn}
+		})
+	end
+
+	while #workers>0 do
+		for i=1,#workers do
+			local worker=workers[i]
+			local serializedPos=worker.position.x..","..worker.position.y..","..worker.position.z
+			if visitedNodes[serializedPos] then
+				table.remove(workers,i)
+				break
+			end
+			visitedNodes[serializedPos]=true
+
+			if worker.position.x==dest.x and worker.position.y==dest.y and worker.position.z==dest.z then
+				return worker.path
+			end
+
+			local def=minetest.registered_nodes[minetest.get_node(worker.position).name]
+			if def and def.groups and def.groups._industrialtest_cable then
+				connections=industrialtest.api.getConnections(worker.position,"i")
+				for j=1,#connections do
+					local direction=vector.subtract(connections[j],worker.position)
+					local oppositeDirection=vector.multiply(worker.direction,vector.new(-1,-1,-1))
+					if direction.x~=oppositeDirection.x or direction.y~=oppositeDirection.y or direction.z~=oppositeDirection.z then
+						if worker.direction.x~=direction.x or worker.direction.y~=direction.y or worker.direction.z~=direction.z then
+							table.insert(worker.path,worker.position)
+						end
+						for c=1,#connections do
+							local nextDirection=vector.subtract(connections[c],worker.position)
+							if c~=j and (nextDirection.x~=oppositeDirection.x or nextDirection.y~=oppositeDirection.y or nextDirection.z~=oppositeDirection.z) then
+								local newWorker={
+									position=connections[c],
+									direction=nextDirection,
+									path=table.copy(worker.path)
+								}
+								table.insert(newWorker.path,worker.position)
+								table.insert(workers,newWorker)
+							end
+						end
+						worker.direction=direction
+						worker.position=connections[j]
+						break
+					end
+				end
+
+				if #connections>2 then
+					break
+				end
+			else
+				table.remove(workers,i)
+				break
+			end
+		end
+	end
+
+	return nil
+end
+
+-- \brief Goes through path vertices specified by path running callback on each node.
+--        Function finishes if either callback returns false or entire path is went over.
+-- \param path table
+-- \param callback function
+-- \returns nil
+function industrialtest.api.walkPath(path,callback)
+	local pos=path[1]
+	for i=2,#path do
+		local pathNode=path[i]
+		local direction=vector.normalize(vector.subtract(pathNode,pos))
+		while pos.x~=pathNode.x or pos.y~=pathNode.y or pos.z~=pathNode.z do
+			if not callback(pos) then
+				return
+			end
+			pos=vector.add(pos,direction)
+		end
+	end
+end
+
 -- \brief Transfers power from source node to it's network, if sides is set then power will be only transfered to network connected to that sides
 -- \param pos Vector with position of source node
 -- \param (optional) sides table with Vectors
@@ -100,8 +196,36 @@ function industrialtest.api.powerFlow(pos,sides,flowOverride)
 					roomAvailable=true
 				end
 			else
-				minetest.remove_node(endpoint.position)
-				industrialtest.internal.explode(endpoint.position,2)
+				local path=industrialtest.api.findPathInNetwork(pos,endpoint.position)
+				if path and #path>0 then
+					table.insert(path,endpoint.position)
+					local removed=false
+					industrialtest.api.walkPath(path,function(pathPos)
+						local def=minetest.registered_nodes[minetest.get_node(pathPos).name]
+						if not def or not def.groups or not def.groups._industrialtest_cable then
+							return false
+						end
+						if powerDistribution>def._industrialtest_cableFlow then
+							removed=true
+							minetest.swap_node(pathPos,{
+								name="air"
+							})
+							minetest.remove_node(pathPos)
+							minetest.check_for_falling(pathPos)
+							minetest.sound_play("default_cool_lava",{
+								pos=pathPos,
+								max_hear_distance=5,
+								gain=0.7
+							})
+						end
+						return true
+					end)
+					if not removed and powerDistribution>endpoint.originalFlow then
+						minetest.remove_node(endpoint.position)
+						industrialtest.internal.explode(endpoint.position,2)
+					end
+					industrialtest.api.createNetworkMapForNode(pos)
+				end
 			end
 		end
 	end
@@ -199,6 +323,7 @@ function industrialtest.api.createNetworkMap(pos,addCables,omit)
 					position=worker.position,
 					distance=worker.distance,
 					flow=math.min(worker.flow,flow),
+					originalFlow=flow,
 					side=connectionSide,
 					sourceSide=worker.sourceSide
 				})
@@ -271,6 +396,34 @@ function industrialtest.api.getNetwork(meta)
 	return minetest.deserialize(meta:get_string("industrialtest.network"))
 end
 
+-- \brief Returns amount of power that will flow from specified network master
+-- \param pos Vector
+-- \returns number
+function industrialtest.api.getFlowingCurrent(pos)
+	local meta=minetest.get_meta(pos)
+	if not industrialtest.api.hasPowerStorage(meta) or meta:get_int("industrialtest.powerAmount")==0 then
+		return 0
+	end
+	local network=industrialtest.api.getNetwork(meta)
+	if not network then
+		return 0
+	end
+
+	local amount=meta:get_int("industrialtest.powerAmount")
+	if amount==0 then
+		return 0
+	end
+	local demand=0
+	for _,endpoint in ipairs(network) do
+		local endpointMeta=minetest.get_meta(endpoint.position)
+		if industrialtest.api.hasPowerStorage(endpointMeta) then
+			demand=demand+math.min(endpointMeta:get_int("industrialtest.powerCapacity")-endpointMeta:get_int("industrialtest.powerAmount"),endpoint.flow)
+		end
+	end
+
+	return math.min(amount,demand)
+end
+
 -- \brief Returns connections of node with power storage. If direction is "i" only input connections will be returned, if direction is "o" only output connections
 --        will be returned, if it's not provided all connections will be returned.
 -- \param pos Vector

cables.lua

@@ -162,12 +162,15 @@ function industrialtest.Cable.createDefinitionTable(self,description,inventoryIm
 		def.sound=mcl_sounds.node_sound_metal_defaults()
 	end
 	def.groups._industrialtest_cable=1
+	if insulated then
+		def.groups._industrialtest_insulatedCable=1
+	end
 
 	return def
 end
 
 function industrialtest.Cable.register(self)
-	local def=self:createDefinitionTable(self.description,self.inventoryImage,self.tile,false)
+	local def=self:createDefinitionTable(self.description,self.inventoryImage,self.tile,self.safe)
 	minetest.register_node(self.name,def)
 
 	if self.insulated then
@@ -385,6 +388,7 @@ industrialtest.internal.unpackTableInto(industrialtest.GlassFibreCable,{
 	inventoryImage="industrialtest_glass_fibre_cable_inv.png",
 	transparent=true,
 	tile="industrialtest_glass_fibre_cable.png",
+	safe=true,
 	size=0.12,
 	flow=industrialtest.api.ivPowerFlow
 })
@@ -401,3 +405,52 @@ minetest.register_craft({
 	}
 })
 -- TODO: Add glass fibre cable craft with silver ingot
+
+if industrialtest.config.electrocution then
+	local electrocutionDelta=0
+	minetest.register_globalstep(function(dtime)
+		electrocutionDelta=electrocutionDelta+dtime
+		if electrocutionDelta<industrialtest.config.updateDelay then
+			return
+		end
+		electrocutionDelta=0
+
+		local offsets={
+			vector.new(0,0,0),
+			vector.new(-0.7,0,0),
+			vector.new(-0.7,1,0),
+			vector.new(0,1,0),
+			vector.new(0.7,0,0),
+			vector.new(0.7,1,0),
+			vector.new(0,0,-0.7),
+			vector.new(0,1,-0.7),
+			vector.new(0,0,0.7),
+			vector.new(0,1,0.7)
+		}
+
+		local players=minetest.get_connected_players()
+		for _,player in ipairs(players) do
+			local pos=player:get_pos()
+			for _,offset in ipairs(offsets) do
+				local nodePos=vector.add(pos,offset)
+				local node=minetest.get_node(nodePos)
+				local def=minetest.registered_nodes[node.name]
+				if def and def.groups and def.groups._industrialtest_cable and not def.groups._industrialtest_insulatedCable then
+					local meta=minetest.get_meta(pos)
+					local networks=industrialtest.api.isAttachedToNetwork(meta)
+					if networks then
+						local current=0
+						for _,network in ipairs(networks) do
+							current=current+industrialtest.api.getFlowingCurrent(network)
+						end
+						if current>0 then
+							local removed=math.ceil(current/500)
+							player:set_hp(player:get_hp()-removed,"electrocution")
+							break
+						end
+					end
+				end
+			end
+		end
+	end)
+end

init.lua

@@ -21,7 +21,8 @@ industrialtest={}
 
 -- Settings
 industrialtest.config={
-	updateDelay=minetest.settings:get("industrialtest.updateDelay") or 1,
+	updateDelay=tonumber(minetest.settings:get("industrialtest.updateDelay") or "1"),
+	electrocution=minetest.settings:get_bool("industrialtest.electrocution",true),
 	developerMode=minetest.settings:get_bool("industrialtest.developerMode",false)
 }
 

settingtypes.txt

@@ -1,5 +1,8 @@
 # This determines value how frequently machines update
 industrialtest.updateDelay (Update delay) float 1.0
 
+# Whether electrocution by uninsulated cables is used
+industrialtest.electrocution (Electrocution) bool true
+
 # Enables additional utils useful when developing mod
 industrialtest.developerMode (Developer mode) bool false