Dear Epic community,
I Am Emptyless 
I want to write out my guide on how to create an easy inventory system but i got a question though on how to small it down. So lets get started.
I will first explain the event that causes your inventory to rise. If you already have an event or something that would cause it to rise than that is fine. Skip bits or continue at step #x
The system that is going to make your inventory full is in my example a tree falling. I have tried to simplify it as much as possible but if you do not understand something just ask
To achieve this follow this:
- go to http://tf3dm.com/3d-model/a-tree-88011.html and download the fbx file of the tree. Import it into the game.
- A: Open blender or any 3D program to cut off a part of the tree (to get the trunk)
- B: Import the FBX file i uploaded. (Dropbox - Error) MODS PLEASE TELL ME IF I HAVE TO REMOVE THIS LINK. I DO NOT KNOW IF IT IS ALLOWED TO LINK FILES ON THIS FORUM (sorry for caps do not want problems O:) )
- create materials from the textures and open the leaves one. Set the blend mode to masked and drag the bottom dot from the texture sample to the opacity mask.
- now open your alan tree and set the element 1 and 2 to broadleaf bark and element 3 to the leaves.
3: create a blueprint -> actor
4: add static mesh, static mesh & a box shape
5: arrange them to something like this:
6: go to the graph
7: create this:
- add event for the tree: on clicked
- add event for triggerbox: on begin overlap, on end overlap
- add a gate and make it open when begin overlap, close it when end overlap and enter when clicked on tree
- create a variable for the tree to be rotated (boolean) and create a branch
- when the variable is false (tree isnt rotated) move component to: rotation y axes 90. ease in ease out and over 1 second
- create a sequence and set the variable of the tree being rotated to true
- trigger a delay and set it to 5 seconds
- create an event dispatcher and call it.
- once delay is finished move component back to y = 0 over 0 seconds (instantly)
- set the variable tree rotated to false
soo now we got our blueprint of a tree. you can just drag and drop trees on your landscape to your liking.
8: select all the trees you have placed
9: open the level blueprint editor
10: right click and add event for actor -> default -> your dispatcher
11: create an integer and call it woodcutting xp
12: close the level blueprint editor
13: create a new blueprint interface and call it woodcutting_xp
- add function -> integer as input and call it woodcutting_xp
14: create a new blueprint interface and call it woodcutting_lvl - add function -> integer as input and call it woodcutting_lvl
15: go back to your level editor and create this: (i have made 2 trees so hence the 2 events etc etc. To create the second tree. Duplicate the static mesh. Open the leaves material from the FBX file of the Alan tree and increase its saturation in photoshop. Now you have 2 leave materials and you can just create the second tree like you did the first tree except with different coloured leaves.) - create a set woodcutting_xp and link all the events you created in step 10.
- create a get woodcutting_xp and link it to integer+integer and link that to the set woodcutting_xp
- right click with the mouse and type in the woodcutting_xp and choose the interface.
- now link the execute from set to the interface.
- link the integer+integer to the integer in the interface
- and create a player controller linked to gethud linked to target of the interface
now we have communicated with the hud.
the next step is to create a nice hud we can interact with.
16: open the hud and create a new function:
17: create the following:
- create input vector2D
- create input string
- create input name
- create input texture2D
just draw all the lines the same way.
18: now we have created a button:
– you will need square textures (39x39) or higher and scale em down
– for nostalgic feels i will place the skills and inventory and equipment icons from runescape. As long as you use it for personal testing i think they’ll be fine with it. you can do a google search for these icons or use these which are already sized to fit:
19: create and place the buttons like this: 
(1920x1080) havent made scaling mechanism yet as it wasnt needed for me
- create and event receive draw hud
- drag in your function button 3x, and create a draw texture and select a random texture and set it to modulate (so it will be opacive which looks cool <3 )
20: create the click events like this: 
- add an event receive hit box click.
- create 2 or 3 (depending on the amount of tabs) booleans with corresponding names to your tabs
- create an switch on name
– !! important to add the EXACT name of the hitbox in the switch on name. !!
– just create the rest like i did.
21: now we are getting somewhere 
create this after your sequence created in step 19. 
- used the booleans created and set in step 20.
22: use the true value and drag it out to a sequence and create this:
(note you have not yet created the function draw skills nor draw mouse over skill, read below)
– to create the Draw Skills create a new function and copy this: this one is almost identical to the draw tabs but has other values
– to create the mouse over function copy this: which has some differences
- it contains the vector 2d (mouse location), integer(xp), texture2d(texture)
– for the draw skills texture use
– for the draw mouse over skill texture use
----!! i almost forgot woodcutting level it is here . just create this in the level blueprint. and for the interface create a blueprint interface. !!
23: Now go on compile and notice the difference when clicking on tabs (you might need to f11 to see your tabs on 1920 x 1080 monitor).
THE INVENTORY PART
24: now come the horrible part of creating an inventory. I have managed to create an easy 1 - 2 - 3 etc item system but when you get to something like 5 / 6 different items the amount of variables becomes HUUUUGE so if someone is reading this who actually has some experience with how this engine works please enlighten me how to create a blueprint of this. <3
25: adding items:
- when we were making the trees give exp in step 15 or so. you might have noticed the sequence 2 off the screen. These are dragged to item 1 and 2.
– see picture:
– the interface in the picture still has to be created:
---- create new blueprint interface
---- for a 6 slot inventory create 6 functions with input integer and for 2 items in total create 2 functions with output texture2D
26: now go to the HUD and drag out the inventory boolean created in step 20 and create a sequence.
– and in the level HUD on the left in the my blueprint section open the texture 1 and texture 2 interace and use these textures for them: 
27: create a new function in the hud called Inventory Spaces and create it like this:
*outdated. Hakabane pointed out better way <3
28: draw a sequence from the sequence in step 26 (you will need the space trust me 
) and create this:
- use blueprint props to add interface and add the inventory interface created in step 25
- i trust you know what booleans are by now <3
- use the equal integer to set the booleans to true
29: now create this from your first sequence made in step 26
- here it is in smaller parts:
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------*
28: create this with what you have created in all the previous steps in the hud 
30: PROFIT
31: result:
i get error when uploading new pictures 
here is the dropbox link: Dropbox - Error Dropbox - Error
I hope i got it all covered. If you got questions or tips please post them in the comments.
Still hoping for someone to improve this system <3
Emptyless
but i coudnt figure out how to get my inventory from a tree other than spawning an actor after the tree was “chopped down” and how to actually display my inventory the way im doing now.
Love the tutorial/guide/wiki, Ill probably try it out sooner or later. Makes sense though!
