Weird code in Electric Mining Drill?

[Xerus]

When I wanted to make my own drill, i looked at the prototype for the electric mining drill and found this:

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    energy_source =
    {
      type = "electric",
      -- will produce this much * energy pollution units per tick
      emissions = 0.15 / 1.5,
      usage_priority = "secondary-input"
    }

why write 0.15/1.5 and not simply 0.1? Is there any reason?

[Patashu]

Sometimes it's more useful to show how a number was arrived at than to just write the number. For example, if you had a 1024x768 game and wanted the constant '30 less than 1024', your intent is clearer if you write 1024-30 than if you write 994.

Why it's 0.15 / 1.5 specifically I don't know - maybe all emission values were divided by 1.5 at one point, and it's just been left like that since?

[darkfrei]

It can be just dividing or two parameters like by resistance
https://wiki.factorio.com/Damage

[QGamer]

So...I've been doing some modding of my own, and I noticed a few things:

1) Tons of entities have code like that. It's not limited to mining drills.

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emissions = some # / some other #

2) The pollution an entity emits is energy_source.emissions times the energy consumption in kW.

3) This format is useful for getting exact numbers of pollution. In a mod I'm making, I wanted an entity to output 15 pollution and consume 325 kW.

This:

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emissions = 3 / 65

...is in my opinion better than this:

Code: Select all

emissions = 0.04615384615