How do I make a "Buy Max" button work?

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- pinewoodpine
- - Joined 18 Oct, 2018
  - 3 topics • 4 posts
- 1
- 21 Nov, 2018
- Quote
Hi guys,

Currently I'm experimenting on a shop/inventory sub-system. One of the things that I want to try on is to set a multiplier/max number allowed button for the shop.

For example,

1. I have 1000 coins.

2. Price for Item A is 11.

3. Clicking on a buy max button with Item A selected will spend all my coins on Item A.

4. I should end up with 90 item A and 10 Coins left.

Where is the starting point for this?

What do I need?

Obviously I will need at least a button...
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- WackyToaster
- - Joined 18 Feb, 2014
  - 50 topics • 1,532 posts
- 1
- 21 Nov, 2018
- Quote
First thing you want is to find out how much is the maximum that can be bought. So you do floor(coins/price). Then you add this amount to the player/subtract it from shop inventory if needed. And obviously also subtract amount bought * price from the players money.