What you learn today
- Contents, Required, Recipe and TotalContents
- Reagent hash
- Check amounts
The furnace reports RecipeHash 0 although temperature and pressure are right. Something is wrong with the mixture – too much iron? Too little carbon? So far the chip could only read the total amount. With lr it sees every single material.
The instruction
lr iron id Contents IRONlr r? device mode reagent reads a reagent amount. The device is a pin, a register with a ReferenceId or an ID. The four modes:
| Mode | Number | returns |
|---|---|---|
Contents | 0 | how much of this reagent is in the device |
Required | 1 | how much of it the current recipe still lacks |
Recipe | 2 | how much of it the current recipe needs in total |
TotalContents | 3 | the sum of all reagents – the reagent is ignored |
TotalContents returns the same as the LogicType Reagents you already know.
The reagent hash
You give the reagent as the hash of its name: HASH("Iron"), HASH("Carbon"), HASH("Copper"), HASH("Nickel"), HASH("Gold"), HASH("Silver"), HASH("Lead"), HASH("Silicon"). Alloys are reagents too: HASH("Steel"), HASH("Invar"). Coal ore gives HASH("Hydrocarbon"), charcoal HASH("Carbon").
The names are English and exact – HASH("Eisen") gives a number that is no reagent, and lr returns 0.
The device by ReferenceId
lr needs a single device. You get the furnace's ReferenceId by name, and with bdns you check whether it is there at all:
lbn id FURNACE HASH("Ofen") ReferenceId Average
bdns id missingWhich modes work where
Contents and TotalContents work on everything that holds molten material: furnaces, arc furnace, recycler, centrifuge, fabricators. Required and Recipe only exist on fabricators that work through a recipe, such as the autolathe.
lr … Required on a furnace is no harmless error: the chip reports IncorrectReagentDevice and stops. Check which device you are dealing with before you use Required or Recipe.
Checking amounts
For steel the iron share should be around 75 %. The chip calculates iron divided by total and checks a band from 70 to 80 %. If the furnace is empty, the total is 0 and the share NaN – sge with NaN gives 0, the light stays off. Exactly right: an empty furnace has no good mixture.
Exercise
Task
Read the amounts of iron and carbon (Contents) from the furnace “Ofen” with lr and the total with the LogicType Reagents. Show them on “Eisen”, “Kohle” and “Gesamt”. The light “Mischung” is on when the iron share is between 70 and 80 %. If the furnace is missing (bdns): all three displays −1, light off.
Hints
Hint 1
Right after the lbn: bdns id missing, at the bottom a section missing: of its own with j start at the end.
Hint 2
lr iron id Contents IRON, the same for carbon, l total id Reagents.
Hint 3
Share: div share iron total, then sge/sle and and.
Quiz
4 questions. You pass from 60 % – the server does the grading.
Complete the day
- Passed the simulator exercise
- Passed the quiz with at least 60 %
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