弹药：

X:\Factorio\data\base\prototypes\item\ammo.lua

查找如下字符串

name = "railgun-dart",

找到如下段落

{

type = "ammo",

name = "railgun-dart",

icon = "__base__/graphics/icons/railgun-ammo.png",

flags = {"goes-to-main-inventory"},

ammo_type =

{

category = "railgun",

target_type = "direction",

action =

{

type = "line",(弹药效果类型

range = 25,(距离，附图中距离为128

width = 0.5,(宽度，为伤害实际宽度，不是效果宽度，附图中距离为32

source_effects =

{

type = "create-entity",

entity_name = "railgun-beam"(弹药实体

},

action_delivery =

{

type = "instant",(造成伤害的方式

target_effects =

{

type = "damage",

damage = { amount = 100, type="physical"}(伤害数值与类型

}

}

}

},

magazine_size = 5,(每发弹夹弹药数量

subgroup = "ammo",

order = "c[railgun]",

stack_size = 200(堆叠数量

}