Factorio Forums

Code: Select all

0eNqNkd1qwzAMhV8l07UNW2j346foRWEXYwwnEYmYYwdbKc1C3n1y2sFgGfRSsvSdo+MZKjfiEMkzmBmoDj6BeZshUeutyz2eBgQDxNiDAm/7XHG0Pg0hsq7QMSwKyDd4BvOwvCtAz8SEF9JaTB9+7CuMMvAfQ8EQkqwFn1UFpWV0ykQFDUWsL0/lov4wy5uZ99tI8czkroa3bWgR/lHp7JeNjZaw6oiMOlLb5RDmbbkbVsXAGrD59R8KnJUrpHd3xMSFLg5XOvlWqlfiLoxcHKOtP2X6hDGt0o+7XbkvX/bPT+WyfAOl66CW

Entities:
  {entity_number=1,name="transport-belt",position={x=-1,y=1},direction=2}
  {entity_number=2,name="transport-belt",position={x= 0,y=1},direction=2}
Tiles:
  {position={x=-1,y=-2},name="hazard-concrete-right"}
  {position={x= 0,y=-2},name="hazard-concrete-right"}

Code: Select all

0eNqNkt1ugzAMhV+F+TqpCiv74Sl2UWkX0zQFsMAaBJS40xji3eek3VR1P+1NJCc53zmxM0PZ7XB0ZBmKGagarIfiaQZPjTVd2ONpRCiAGHtQYE0fKmeog0UB2RrfoUgXdVbCzlg/Do51iR0fibPlWQFaJibcm8dierG7vkQn9G+GFwg1Levor2AcvKgGG0yFtFYwySromhxW+5MsZDshZn+l+oHU61UeqekqP8+9vpj7D1a6wdQdWnEaJ40qLeZfTq35MK7WMrnKIaN2oUEQwv3anQukEiCOrjj6HAo6Iy+Rvastek508nCgk22keiRuk60z1atcfUPno+/NZpPl2X1+d5styyf088yQ
Entities:
  {entity_number=1,name="straight-rail", position={x= 0  ,y=0  },direction=2}
  {entity_number=2,name="transport-belt",position={x=-0.5,y=1.5},direction=2}
  {entity_number=3,name="transport-belt",position={x= 0.5,y=1.5},direction=2}
Tiles:
  {position={x=-1,y=-2},name="hazard-concrete-right"}
  {position={x= 0,y=-2},name="hazard-concrete-right"}
]

Code: Select all

RealPosition Blueprint::getBuildingPosition(const RealPosition& position) const
{
  if (this->isPlaceableOffGrid())
    return position;

  uint8_t buildingGridBitShift = this->getBuildingGridBitShift();
  TilePosition tiledResult = position;
  tiledResult.roundToGridBitShift(buildingGridBitShift);
  RealPosition result(tiledResult.x, tiledResult.y);
  result.x += (1 << buildingGridBitShift) * 0.5;
  result.y += (1 << buildingGridBitShift) * 0.5;
  return result;
}

void TilePosition::roundToGridBitShift(uint8_t shift)
{
  this->x = (this->x >> shift) << shift;
  this->y = (this->y >> shift) << shift;
}

Code: Select all

withoutTrack->getBuildingPosition({1,1})
  buildingGridBitShift = 0
  roundToGridBitShift = (1 >> 0) << 0 = 1
  result.x = 1 + (1 << 0) * 0.5 = 0.5
  return {1.5,1.5}
  
  (0.5,0.5) extra shift

withTrack->getBuildingPosition({1,1})
  buildingGridBitShift = 1
  roundToGridBitShift = (1 >> 1) << 1 = 0
  result.x = 0 + (1 << 1) * 0.5 = 0 + 1 = 1
  return {1,1}
  
  No extra shift

Code: Select all

local function roundToGridBitShift(position, shift)
	position.x = bit32.lshift(bit32.rshift(position.x, shift), shift)
	position.y = bit32.lshift(bit32.rshift(position.y, shift), shift)
	return position
end

local function getPositionForBPEntity(entity)
	local position = entity.position
	
	if (entity.has_flag("placeable-off-grid")) then
		return position
	end

	local buildingGridBitShift = entity.building_grid_bit_shift
	local tiledResult = position
	tiledResult = roundToGridBitShift(tiledResult, buildingGridBitShift)
	local result = {x=tiledResult.x, y=tiledResult.y}
	result.x = result.x + bit32.lshift(1, buildingGridBitShift) * 0.5
	result.y = result.y + bit32.lshift(1, buildingGridBitShift) * 0.5
	return result
end

script.on_event(defines.events.on_player_setup_blueprint, function(event)
	local player = game.players[event.player_index]
	local surface = player.surface
	local bp = player.cursor_stack
	local flag = false
	local entities = surface.find_entities_filtered({force = player.force, area = event.area})
	local forbp = {}
	local avgpos = {x=0, y=0}
	for _,entity in pairs(entities) do
		local ename = entity.name
		local pos = entity.position
		if string.find(entity.name, "rangeboost") then
			flag = true
			ename = getTurretBaseName(entity)
			--pos.x = pos.x+1 --These are the lines that break/fix the preview and placement
			--pos.y = pos.y+1
		end
		table.insert(forbp, {entity_number=#forbp, name=ename, position=pos, direction=entity.direction})
		avgpos.x = avgpos.x+entity.position.x
		avgpos.y = avgpos.y+entity.position.y
	end
	if not flag then return end
	avgpos = {x=avgpos.x/#forbp, y=avgpos.y/#forbp}
	for _,entry in pairs(forbp) do
		entry.position.x = entry.position.x-avgpos.x
		entry.position.y = entry.position.y-avgpos.y
	end
	bp.set_stack({name=event.item, count=1}) --since always invalid
	game.print("BPing " .. #forbp .. " entities:")
	for _,v in pairs(forbp) do game.print(v.name .. " @ " .. v.position.x .. ", " .. v.position.y) end
	bp.clear_blueprint()
	bp.set_blueprint_entities(forbp)
end)