NML - a Newgrf Meta Language

[Eddi]

and next merging it using another tools...

it's not that difficult...

anyway, you could try this: (untested)
[Edit: possibly cleaner version]

[TadeuszD]

I have next questions:
When the callback bitmask_vehicle_info is called? Is it called every time when property bitmask_consist_info is used?
Can I use bitmask_consist_info to determine wagon's parameter? Or this property can be called only from leading engine? Is there any protection against recursive calls?

What I want to do... I have defined the wagon with three cargo subtypes available. I want to decrease wagon's max speed if combination of wagons in the train and their cargo subtype settings fulfills special conditions. It should be independent of other wagon speed limits.

[TadeuszD]

I found partial answer myself.

Can I use bitmask_consist_info to determine wagon's parameter?

Yes, you can. But if you want to calculate bitmask_consist_info for whole train you should use PARENT scope in switch definition. See the example:

Code: Select all

switch(FEAT_TRAINS, PARENT, switch_wagon_speed, hasbit(bitmask_consist_info, VINFO_EXT_PASSENGER_WAGON) ) {
    1: return 160;
    return 125;
}

[frosch]

bitmask_vehicle_info is not called everytime the variable is accessed.

All vehicle callbacks which affect vehicle properties are called when the consist changes and serveral other triggers. The results are then cached, and not updated when the vehicle moves normally.

bitmask_vehicle_info is the first callback which is called. So after a consist is created/changed, the bitmask is computed for all vehicles in the consist. Any properties afterwards can thus refer to bitmask_consist_info. bitmask_vehicle_info otoh cannot refer to any properties that change via callbacks.

[TadeuszD]

NMLC r2095 and 5029. Unexpected chars at the begin and end of warning message:

Code: Select all

←[33m nmlc warning: "src\\constr-stages.pnml", line 101: Block 'switch_constr_anim_speed' is not referenced, ignoring.←[0m

[Eddi]

looks like escape sequences (colour changes?) to me. use a terminal that understands those

[planetmaker]

Yes, looks like the way we added colour to the warnings is not fool-proof. On terminals which don't understand it, they show up as these weired characters.
http://dev.openttdcoop.org/issues/5411

[TadeuszD]

I'm using Windows command line shell...


And I have next problem. I'm not sure is this the real bug, but the result doesn't match to NML documentation...
In my house I defined:

Code: Select all

building_flags:             bitmask(HOUSE_FLAG_ANIMATE, HOUSE_FLAG_RANDOM_ANIMATION);

According to NML documentation the extra_callback_info1 argument in anim_next_frame callback should contains 32 random bits. In my opinion it doesn't work. I've checked many combination and extra_callback_info1 is always 0.
For example, this piece of code always returns 4:

Code: Select all

switch(FEAT_HOUSES, SELF, switch_anim_next_frame, STORE_TEMP(4, 1)) {
    return LOAD_TEMP(1);
}

and this piece of code always return 0...:

Code: Select all

switch(FEAT_HOUSES, SELF, switch_anim_next_frame, STORE_TEMP(extra_callback_info1, 1)) {
    return LOAD_TEMP(1);
}

Does this problem corresponds to http://dev.openttdcoop.org/issues/5294 ?

[MinchinWeb]

Yes, Windows command prompt doesn't like ANSI escape characters like the colours. You can use a library like Colorama to get coloured console output on Windows. And I think the only code you need to add at the start of your Python program is:

Code: Select all

from colorama import init
init()

and coloured output should work fine.

[Eddi]

be aware that due to an oddity in nfo, switches with only a "return" without any other decision targets are a special case, which returns the last accessed variable instead of whatever comes after "return". maybe that spoils your output.

so

Code: Select all

switch(1) {
  return 2;
}

actually returns "1", not "2"

use

Code: Select all

switch(1) {
  0: return 2;
  return 2;
}

instead

Does this problem corresponds to http://dev.openttdcoop.org/issues/5294 ?

unlikely

[TadeuszD]

be aware that due to an oddity in nfo, switches with only a "return" without any other decision targets are a special case, which returns the last accessed variable instead of whatever comes after "return".

Thanks. Good to know...
But I tested many combination. For example, I expect that code below returns frame #0 with probability 75% (two random bits are tested, random bits should be refreshed every ~7.5 seconds (256 ticks)) but it always returns frame #1:

Code: Select all

property {
building_flags:         bitmask(HOUSE_FLAG_ANIMATE, HOUSE_FLAG_RANDOM_ANIMATION);
refresh_multiplier:     0;
...
}

switch(FEAT_HOUSES, SELF, switch_anim_next_frame, extra_callback_info1 & 0x03 != 0) {
    1: return 0;
    return 1;
}

[WWTBAM]

So I was going to look into resurrecting the NSW Bus Set. I tried using the attached files as a start using NML 2.3.x so as to have TTDP compatibility. The vehicle gets introduced in OpenTTD but not in TTDP. I was told NML 2.x was kept for TTDPatch compatibility. Ignore the errors regarding the sprites not showing up in game as that is not my primary concern unless they are causing TTDP to bork.

[WWTBAM]

Here is the NFO equivalent of the NML in the zip in my last post except using a byte-size ID instead of word-size. It also has issues in both OpenTTD and TTDPatch - no vehicle appears in either game with no grfcodec errors or errors from the game.

[Rodney7790]

Hello, while finishing my second set, strange problem has appeared. In my first set, adding sounds was easy by this part of code:

Code: Select all

switch(FEAT_TRAINS, SELF, sound_169 , extra_callback_info1) {
    SOUND_EVENT_START: return sound("snds/start.wav");
	SOUND_EVENT_TUNNEL: return sound("snds/houkacka.wav");
    return CB_RESULT_NO_SOUND;
}
.
.
.
graphics {
.....
		sound_effect:			sound_169;
    }

Now I have copied the same to my second set and it doesn't make any sound. I have used the same sounds. Can anyone help me? Thank you.

[Trond]

Is it in a new folder? If it is, did you remember to copy the soundfiles to the new folder?

[Rodney7790]

Yes, I have copied files to folder of new set. The GRF file is much bigger than before. But it doesn't do any sound in game.

[Eddi]

two things:

are you sure you modified the vehicle id in the "item" statement after copying)

and if you reuse the same sounds, just put the same switch id there, no need to duplicate the sounds.

[Trond]

So, there is no support for norwegian letters with NML? I get an error when trying to encode with a languagefile containing the norwegian letter 'å'... When I remove the 'å', it encodes fine...

[planetmaker]

So, there is no support for norwegian letters with NML? I get an error when trying to encode with a languagefile containing the norwegian letter 'å'... When I remove the 'å', it encodes fine...

There is support for virtually every letter. Required encoding for all text files is UTF-8, you likely use something else; check with your editor settings.

[Trond]

Seems the file I downloaded was "UTF-8 without BOM" or something like that. When I changed it in Notepad++ to UTF-8 it worked fine...