regenerate_entity syntax

[hreintke]

Hi,

Maybe a lua misunderstanding from me but this what I face.

The function is defined as

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regenerate_entity(entities, chunks)
Regenerate autoplacement of some entities on this surface. This can be used to autoplace newly-added entities.

Parameters
entities :: string or array of string (optional): Prototype names of entity or entities to autoplace.
chunks :: array of ChunkPosition (optional): The chunk positions to regenerate the entities on. If not given all chunks are regenerated. Note chunks with status < entities are ignored.
Note: All specified entity prototypes must be autoplacable. If nothing is given all entities are generated on all chunks.

What I want to achieve is regenerate all entities in a specified number of chunks.
So : parameter entities -> not given
parameter chunks -> given

According to my lua knowledge & searching this should be done with f.e.

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game.player.surface.regenerate_entity(chunks = ...)

But when running :

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/c 
  local ca = {}
  ca[1] = {82,17}
  game.player.surface.regenerate_entity(chunks = ca)

I get : the error ") expected near ="

Running

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/c 
  local ca = {}
  ca[1] = {82,17}
  game.player.surface.regenerate_entity("tree-02", ca)

works as expected.

What syntax should I use ?

[eradicator]

What you're trying here:

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 game.player.surface.regenerate_entity(chunks = ca)

is calling regenerate_entity with a table as argument, which would look like this:

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 game.player.surface.regenerate_entity({chunks = ca})
---or
 game.player.surface.regenerate_entity{chunks = ca}

But as regenerate_entity seems to take two independant arguments instead of a table (like most other API functions) you'd have to call it like this:

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 game.player.surface.regenerate_entity(nil,ca)

I.e. supplying two arguments, but the first one is empty.

Edit:
Hm...tried it, but doesn't work. Weird. Empty table just doesn't regenerate anything :o.
Edit2:
I asked a dev and they said it's not currently possibly to specify chunks without entities.

[hreintke]

Thanks for clarification.

I did try the ("",ca) and (nil,ca) variants before I posted. Should have mentioned that.

Bad luck that the regenerate function is not really flexible.
Would be nice to have some options like "all except .." or based on types "only trees" or "no resources"

[eradicator]

Can't you just autogenerate a list of all possibly regeneratable entities using LuaGameScript.decorative_prototypes, LuaGameScript.autoplace_control_prototypes, etc?

(Btw, more specifically: The API doesn't allow not specifying positional arguments that are followed by specified arguments. I.e. Any function that has positional arguments must always have all arguments up to the position you want.)

[hreintke]

Thanks again.

Didn't know about that possibilty and will use it for sure