Factorio Block spitter attack.

data-final-fix.lua

--For 0.13.13 and later there will be layer-10 through layer-15 that can be used.
local projectile_layer = "layer-13"
local suffix = "-blockable"

local function make_projectile_blockable (prototype_name)
  local prototype = data.raw.projectile[prototype_name]
  if not prototype then
    return prototype_name
  end
  local newname = prototype.name .. "-blockable"
  -- if it already exists don't duplicate
  if not data.raw.projectile[newname] then
    local proto = table.deepcopy(prototype)
    proto.name = proto.name .. suffix
    if proto.collision_box then
      -- expand if all 0s
      proto.collision_box = {
        {
          math.min(-0.1, proto.collision_box[1][1]),
          math.min(-0.5, proto.collision_box[1][2]),
        }, {
          math.max(0.1, proto.collision_box[1][1]),
          math.max(0.5, proto.collision_box[1][2]),
        }
      }
    else
      proto.collision_box = {
        {
          -0.1,
          -0.5
        }, {
          0.1,
          0.5
        }
      }
    end
    if proto.collision_mask then
      table.insert(proto.collision_mask, projectile_layer)
    else
      proto.collision_mask = {projectile_layer}
    end
    data:extend({proto})
  end
  return newname
end

-- walls
for _, wall in pairs(data.raw.wall) do
  wall.collision_mask = {"item-layer", "object-layer", "player-layer", "water-tile", projectile_layer}
end

info.json

{
    "name": "block-spitters-attack",
    "version": "0.1.1",
    "title": "Block Spitters Attack",
    "author": "ms-td",
    "dependencies": ["base >= 0.16.0"],
    "description": "壁がスピッターの攻撃を受け止められるようになる. Earendel氏のWalls Block Spittersから数値調整をオミットしたものです.",
    "factorio_version": "0.16"
}