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script.on_event(defines.events.on_player_configured_blueprint, function(event)
     --log( "surface create?" );
	local player = game.players[event.player_index]
	local stack = player.cursor_stack
	log( "blueprint seetup." );
	if not stack.valid then 
		log( "stack not valid" );
		return
	end
	if not stack.valid_for_read then
		log( "stack not valid for read" );
		return
	end
	if stack.name ~= "blueprint" then
		log( "stack is not a blueprint" );
		return
	end	

	local entities = stack.get_blueprint_entities()
	log( "blueprint has entities:".. #entities );
	for k, entity in pairs (entities) do
		if entity.name == ghostElectricPole then
			entity.name = railPole;
			items_changed = true;
		end
	end

  local blueprint_icons = player.cursor_stack.blueprint_icons
  for k=1,4 do
    if( blueprint_icons[k] ) then
        if blueprint_icons[k].signal.name == ghostElectricPole then
          blueprint_icons[k].signal.name = railPole
          break
        end
    end
  end
  player.cursor_stack.blueprint_icons = blueprint_icons  
  stack.set_blueprint_entities(entities)

	--local stack = player.cursor_stack.  event.player_index
end)

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local lastEvent = nil;
local lastEventType = 0;

function reRaiseEvent( entity ) 
	lastEvent.created_entity = entity;
	script.raise_event( lastEventType, lastEvent );
end

function OnBuildEntity(eventType,event)
-- remove automatic connected cables
	lastEventType = eventType;
	lastEvent = event;
	local entity = event.created_entity;

-- .... the remaining code in onBuildEntity

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	OnBuildEntity(defines.events.on_robot_built_entity,event)

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	reRaiseEvent( ghostCreated );
	--onGlobalBuilt(ghostCreated)

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local init = false;
trains.onTick=function (entity)
	if not init then
		-- only need a little more than the max of the entity so energy doesn't hit 0 and flash the fuel symbol...
		-- couldn't find an actual reference for how big the actual buffer is in the train... seems to be just +1333.33 or something
		basePowerMax = game.entity_prototypes["hybrid-train"].max_energy_usage + 10;
		init = true;
	end

-- the remaining code in trains.onTick

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	local requiredPower=basePowerMax-entity.energy   --  (10666-25010) = -14343.3333
	local ghostAccu=ghostRailAccu(rail)              -- 
	ghostAccu.electric_drain = requiredPower/60      --    neg electric_drain ; doesn't set to < 0 in accum
	local max_power = ghostAccu.energy               --   25000
	local power_transfer = 0                         --    0
	if (max_power < requiredPower) then              --  25000 < -14333.33 (false)
		power_transfer = max_power                    --  
	else                                             --
		power_transfer = requiredPower                --   -14343.333
	end
	  
	--  Transfer energy that will be drained over the next second into some entity
	entity.energy = entity.energy + power_transfer     --  entity.energy = 10666.666 (removed 14343 energy from train)
	ghostAccu.energy=ghostAccu.energy-power_transfer --  accum = 25000 + 14343.333 (capacity is 25k so no change)

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-- this is a constant
local backwardRail = {rail_direction=defines.rail_direction.back, rail_connection_direction=defines.rail_connection_direction.straight};

rail = rail.get_connected_rail(backwardRail)

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The mod TrainsCaller caused a non-recoverable error.
Please report this error to the mod author.

Error while running event TrainsCaller::on_player_placed_equipment (ID 38)
LuaTrain doesn't contain key train.
stack traceback:
	__HermiosLibs__/dataLibs.lua:64: in function 'getUnitId'
	__TrainsCaller__/methods/trainFunctions.lua:17: in function 'new'
	__TrainsCaller__/methods/trainFunctions.lua:29: in function 'setListTrains'
	__TrainsCaller__/methods/globalEvents.lua:62: in function 'OnEquipmentPlaced'
	__HermiosLibs__/controlLib.lua:93: in function <__HermiosLibs__/controlLib.lua:87>
stack traceback:
	[C]: in function '__index'
	__HermiosLibs__/dataLibs.lua:64: in function 'getUnitId'
	__TrainsCaller__/methods/trainFunctions.lua:17: in function 'new'
	__TrainsCaller__/methods/trainFunctions.lua:29: in function 'setListTrains'
	__TrainsCaller__/methods/globalEvents.lua:62: in function 'OnEquipmentPlaced'
	__HermiosLibs__/controlLib.lua:93: in function <__HermiosLibs__/controlLib.lua:87>