[Scripting Question] Difficulties with modifying mining game

[Arachnee]

Hello, all. I've been having difficulties with a mechanic I wish to add to mining. I wanted to be able to change the probability of discovering certain items depending on location. For example, one map would have a higher chance of the player finding fossils, while another map would have a higher chance of finding shards. I thought I could probably achieve this by checking for the game map

if $game_map.map_id==7
ITEMS = [...]
else
ITEMS = [...]
end

But when I tried that, I got the error

Script 'PMinigame_Mining' line 142: NoMethodError occurred.
undefined method 'map_id' for nil:NilClass

I wasn't really sure what to do, so I added things the below code to class MiningGameScene

attr_accessor :map_id
@map_id = 0

But it wasn't any good. I'm not really sure what to do next. Does anyone know what I'm doing wrong? Thank you for any help in advance.

 

[Arachnee]

Never mind everyone. I found a way to achieve what I wanted. Thank you for any consideration.

 

[WolfPP]

Never mind everyone. I found a way to achieve what I wanted. Thank you for any consideration.

Can you share with us what you did? :D

 

[Arachnee]

I just create a copy of PMinigame_Mining, and changed the item list in the copy to only the fossils. Then I changed the name of pbMiningGame in the copy to pbMiningGameFossil. I changed every mention of MiningGameScene to MiningGameScene2 and every mention of MiningGame to MiningGame2. It is very inelegant but does work.