Item Combinations

OneShot uses custom logic to make item combination possible. This requires editing a script file, and a common event.

Combination Definition

For the game to register a combination, it must be defined in the Data_Item script. A short excerpt from said script:

Copymodule Item
    COMBINATIONS = {
        [3, 4] => 5,
        [8, 9] => 10,
        [10, 12] => 13,
    }
end

The logic is simple: [item_id_1, item_id_2] => result_id So in case of [ 3, 4 ] => 5, the game will have something happen when you combine the item with ID 3, and the item with ID 4. In vanilla’s case, it’s alcohol with dry branch.

The order doesn’t matter, so you don’t need [ 4, 3 ] => 5 as well in case the player tries combining them in a different order.

It’s highly suggested you leave comments in the script indicating what’re the associated items and result are.

The result_id is a value that gets inserted into the [0002: g New Item] variable, which is then used in the result definition. The variable is set to 0 when the player attempts an undefined combination.

Result Definition

The 001: Use Item common handles what happens after a combination was attempted. Use the [0002: g New Item] variable that gets set after attempting to combine items. It’s plain RPG Maker XP from here.