Thank you so much everything was correct code wise i needed to add the sprite mask to the slot objects tried today have been swarmed with engineering school lately. Thank you again! now onto creating the menu.
GML Flexible Inventory System
- Thread starter Cloaked Games
- Start date
Cloaked Games
Member
You should have the inventory as a global ds_grid, then you can reference it from anywhere in the game.
Just create some slots for the hotbar where you need them, in addition to the slots in your inventory room.
Cloaked Games
Member
This tutorial should work fine for that type of game. Nothing special you need to do to get it to work in any particular genre. The quantity of items just extends your enumerator, data structures, etcetera.
Cloaked Games
Member
In the code where you would put items into a slot, do an additional check based on the type. There's a lot of ways you can do this, and it depends on what specific limits you want to have.
- You may have different item_gain functions that you use depending on the type, that start the for loop for finding slots at different locations.
- You could also possibly assign types, or a list of types to individual slots, either on the object or in a new data structure and check for that.
I hope that helps. It's hard to give a specific answer.
McFishy
Member
Thanks for the tutorial! I found a way to better use this with cameras/view-ports. The device_mouse_x_to_gui(device); function can be used to get the mouse x/y relative the the gui layer and you could check for the position of the mouse when you click to see if its over a inventory slot.
Cloaked Games
Member
Updated the tutorial to utilize new GML syntax highlighting! A nice improvement.
joeblo24
Member
I'm not sure if it was posted yet but I was able to finally find a way to get a stackable'ish inventory.
/// @description Creates the inventory slots.
var slot = 0;
var slot_counter = 0
var new_row_x = 0;
var new_row_y = 0;
while (slot < ds_grid_width(global.inventory))
{
slot_counter +=1
if slot_counter>5 then
{
new_row_x += 320;
new_row_y += 64;
slot_counter = 1;
}
var inst = instance_create_depth(x+8+(64*slot)-(new_row_x), y+8+(new_row_y),0, obj_slot);
inst.var_slot = slot;
slot ++;
}
I don't think it's perfect but it does what I was looking for and wanted to share.
Thanks Cloaked Games for the engine!
/// @description Creates the inventory slots.
var slot = 0;
var slot_counter = 0
var new_row_x = 0;
var new_row_y = 0;
while (slot < ds_grid_width(global.inventory))
{
slot_counter +=1
if slot_counter>5 then
{
new_row_x += 320;
new_row_y += 64;
slot_counter = 1;
}
var inst = instance_create_depth(x+8+(64*slot)-(new_row_x), y+8+(new_row_y),0, obj_slot);
inst.var_slot = slot;
slot ++;
}
I don't think it's perfect but it does what I was looking for and wanted to share.
Thanks Cloaked Games for the engine!
killerwolf
Member
Hey, I was wondering if there's a way to make unique id's for each item, so if there are two item.swords, they would both be different and contain different stats
Cloaked Games
Member
Yes. This is explained in the tutorial. This is done using enums and takes the form of item.apple or item.sword etcetera.
killerwolf
Member
yeah, but I'm talking about the same item. I would like to have the same item.sword in my inventory, but have different stats. If I do apply an edit to item.sword, it'll apply to all item.swords since the iid is just item.sword.
I'm trying to make a item scrolling system in the game i'm working on which is why I needed unique id's
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Cloaked Games
Member
@killerwolf Ah, I understand your question now.
You are correct, this inventory tutorial is not designed for that type of item system. You will need to make some major modifications yourself to do that. Here are a few ideas, though I cannot give you a full explanation:
- Each item can be it's own data structure instead. This would be a grid or a list, and each position would correspond to a different piece of the item data.
- OR you could use the same system, and to save memory have a small data structure which includes the item ID referencing the item index, and a list of item data modifications that apply to a specific item. (This is how Minecraft works, using NBT data).
- You will need to update the item moving code to check for items that both have matching IDs and matching modification data.
- This will be much easier to do in GML 2.3, as you can use structs to store modification data. (This solution is what I will be doing in my current project).
You are correct, this inventory tutorial is not designed for that type of item system. You will need to make some major modifications yourself to do that. Here are a few ideas, though I cannot give you a full explanation:
- Each item can be it's own data structure instead. This would be a grid or a list, and each position would correspond to a different piece of the item data.
- OR you could use the same system, and to save memory have a small data structure which includes the item ID referencing the item index, and a list of item data modifications that apply to a specific item. (This is how Minecraft works, using NBT data).
- You will need to update the item moving code to check for items that both have matching IDs and matching modification data.
- This will be much easier to do in GML 2.3, as you can use structs to store modification data. (This solution is what I will be doing in my current project).
killerwolf
Member
@Cloaked Games
Thanks, I was thinking about doing the second option based off of your inventory system. I just wasn't sure how to approach it
Thanks, I was thinking about doing the second option based off of your inventory system. I just wasn't sure how to approach it
killerwolf
Member
@Cloaked Games which data structure do you recommend? dslists?
Cloaked Games
Member
It really depends on your exact implementation. ds_list or ds_grid can both be used, or even a combination of them. Try drawing a picture of the data you want to store, to see what might work the best.
killerwolf
Member
@Cloaked Games So i reworked part of the code, but i can't understand why global.item_list is being modified when i'm changing the map values in global.inventory2. When i change "str" to 4, the items in item_list also change from 0 to 4.
Last edited:
Cloaked Games
Member
@killerwolf Sorry for the long delay in response. I hope you've already figured it out...
At any rate, I don't think I can really answer your question. Try to keep track of where all your data is stored. If you are using the same reference to the grid, it's going to modify the same grid.
Remember, the way this inventory system works is with a single item index. If you change a value in the inventory it'll be great, but if you change a value in the item index, it will change for every item. There are some tips for other approaches that let you change values with more granularity if you look through the thread a bit. But I can't give specific answers for doing that.
At any rate, I don't think I can really answer your question. Try to keep track of where all your data is stored. If you are using the same reference to the grid, it's going to modify the same grid.
Remember, the way this inventory system works is with a single item index. If you change a value in the inventory it'll be great, but if you change a value in the item index, it will change for every item. There are some tips for other approaches that let you change values with more granularity if you look through the thread a bit. But I can't give specific answers for doing that.
plshelpwithcodesok
Member
Can we use this in commercial projects?
Cloaked Games
Member
Yes of course. It's just a tutorial, do what you want.