Score did not update?

Stoneclipse

I have an integers attribute called coins, and i have a store to purchase items. I uses custom font for the number of coins. However, in the store, when i purchase an item, i have it change coins attribute to coins-500. But the number of coins in the scene did not change? It will only change when i change scene and then go back to that scene. Any help to make it change automatically without changing scene?

MotherHoose

the coinActor in the scene is not updating with the purchase …
though it is updating in the game … as it shows when you change scenes

somehow you have to code the coinActor to update during runTime

on coinActor:
add Attribute: currentCoins (index type!)
Rule: when
Attribute: self.currentCoins ≠ game.Coins
-changeAttribute: self.currentCoins To: game.Coins

and, have the display for coins use the self.currentCoins instead of game.Coins

MH

tatiang

You need to make your coins attribute a game-level attribute (game.coins) instead of a scene attribute. That way it will carry through from scene to scene.

Stoneclipse

Hey thanks! I just figured out i made a mistake! I had the rule in the custom font numbers as change attribute self.image, instead of constrain attribute, that's why it never change when i buy something. LOL i kept mixing up change attribute and constrain attribute. )

Anyway what's the difference between index and integer?

MotherHoose

in GS … lua … the type of integer (number) allocates memory bits/bytes for value storing

indexTypes stores only positive whole numbers … allots the least bits/bytes for storage

for numbers such as coins/score/lives which you never want to be a negative number… use index
(all mathematical operations on index, integer, real type of numbers are handled the same
… but the storage for the valueRange is different …
for integer and index the computer rounds-off the values before storing)

EX:
indexType: coins = 1 … when changed to coins-3 … will result in 0
integerType: coins = 1 … when changed to coins-3 … will result in -2

MH