Transport Tycoon Forums

Posted: **10 Jul 2023 11:25**

Hello,
I'm playing with NML and trying to code a few cargos and industries and ran into a problem producing cargo.
I implemented the produce_256_ticks callback where I produce the same amount from the amount of input cargo, however a single train and a single station is usually loaded between 30-36 items out of 50.
It looks like Pasture will indeed produce 50 units (5 units was produced in 2 months ago), but only a portion is loaded onto the train. Does this affect any game settings?

What is the problem?

Thanks for the tips.

: 2023-07-10T13-01-41_small.png (185.75 KiB) Viewed 3452 times

Code: Select all

produce(empty_prod, [], [])

produce(pasture_prod256_prod,
    [LAMB: LOAD_TEMP(4);],
    [SHEP: LOAD_TEMP(4);],
    0
    )

switch(FEAT_INDUSTRIES, SELF, pasture_256_prod_cb0, [
        STORE_TEMP(min(incoming_cargo_waiting("LAMB"), 5), 4),
        incoming_cargo_waiting("LAMB")
    ]) {
    0: empty_prod;
    pasture_prod256_prod;
}

switch(FEAT_INDUSTRIES, SELF, pasture_extra_text, [
        STORE_TEMP(this_month_production("SHEP") | 
            production_rate("SHEP") << 16, 0x100)
    ]) {
	return string(STR_IND_EXTRA_PASTURE);
}

item(FEAT_INDUSTRIES, pasture, 125) {
    property {
        substitute: INDUSTRYTYPE_TROPICAL_FACTORY;
        layouts: [pasture_industry_layout_tilelayout];
        life_type: IND_LIFE_TYPE_PROCESSING;
        cargo_types: [accept_cargo("LAMB"), produce_cargo("SHEP", 0)];
        min_cargo_distr: 1;
        spec_flags: bitmask(IND_FLAG_LONG_CARGO_TYPE_LISTS,
                            IND_FLAG_BUILT_ONLY_BEFORE_1950);
        name: string(STR_IND_PASTURE);
    }
    graphics {
        produce_256_ticks: pasture_256_prod_cb0;
        extra_text_industry: pasture_extra_text;
    }
}

Posted: **10 Jul 2023 13:05**

The station rating affects how much cargo is transported. If the station picking up the cargo is 75% for that cargo, 75% of the cargo produced will be given to the station for transport, and the remaining 25% of the production is lost.

It's possible to implement a custom station rating calculation for cargo types that e.g. makes the rating fixed at 100% so you always get everything, regardless of the service level. This is also done in the NewGRF.

Posted: **11 Jul 2023 04:31**

jfs wrote: ↑10 Jul 2023 13:05 The station rating affects how much cargo is transported. If the station picking up the cargo is 75% for that cargo, 75% of the cargo produced will be given to the station for transport, and the remaining 25% of the production is lost.

Thank you, that is good to know. I think I forgot that over the years.

jfs wrote: ↑10 Jul 2023 13:05 It's possible to implement a custom station rating calculation for cargo types that e.g. makes the rating fixed at 100% so you always get everything, regardless of the service level. This is also done in the NewGRF.

Can you give me more details about this? In the NML Stations documentation, there is only a cargo_rating variable, but there is no property or callback to modify it. What mechanism for self-calculation of the station cargo rating can be used? Is it in any NewGRF that has open source code?

Posted: **11 Jul 2023 04:54**

adpro wrote: ↑11 Jul 2023 04:31 Can you give me more details about this? In the NML Stations documentation, there is only a cargo_rating variable, but there is no property or callback to modify it.

Yeah, I found callback in Cargo documentation page

, but it is still not clear for me.

Is it in any NewGRF that has open source code and use this callback?

EDIT
I tried

Code: Select all

item(FEAT_CARGOS, sheep, 62) {
    graphics {
        station_rating: 255;
    }
}

to see what happens with station rating ingame and now I think I understand how it works.

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