[NML] Problems with new railtype definition

[michael blunck]

I read that there is a random switch for railtypes, with only 2 results, but then it says that the outcome is 'pseudo-random, based on location'.
What is that supposed to mean? Is it related to terrain, or rather to tile coordinates? Or maybe something else?

IIRC, it´s based on tile location.

regards
Michael

[planetmaker]

[
I read that there is a random switch for railtypes, with only 2 results, but then it says that the outcome is 'pseudo-random, based on location'.
What is that supposed to mean? Is it related to terrain, or rather to tile coordinates? Or maybe something else?

It's the last two bits of the tile coordinate which will be reported as 'random' bits. So if you covered the whole map uniformly with tracks, you'd recognize a regular pattern. De-facto it doesn't matter as you'll never have a map covered entirely by the same type of tracks (type + direction) and it won't be visible.

[arikover]

Thank you very much, all of you!

[Transportman]

Go the if-block way :
I figured I can't use an if-block inside a switch block, nor a switch block inside an if-block.

it could be done in the proper way, with having two sprite blocks and skipping one of them according to the signals_on_traffic_side flag (by an action7/9).

I'm not sure how to do that in nml. I tried :

Code: Select all

if (signals_on_traffic_side) {
    spriteset(spritesetA ...template blah blah);
    spriteset(spritesetB ...template blah blah);
    ...
} else {
    spriteset(spritesetA ...template blah blah);
    spriteset(spritesetB ...template blah blah);
    ...
}

But of course now it says that 'spritesetA' has already been defined and can't be defined twice.

I am evidently missing something here...

I've hit the same problem with the Dutch Trainset when implementing the track-dependency for the power (and disabling that when no compatible trackset is loaded), and I ended up with if/else-ing the graphics-block of the item. One with track-dependency and the power pointing to a switch and one without track-dependency having just a return value. You would need the same and use different names for the various spritesets/switches.

[arikover]

Now I understand why some of my other stuff didn't work. if-blocks can be made inside item-blocks, but outside property- or graphics-blocks!

Thank you Transportman!