- PHP EXPLODE ADDING 0 INTO FIRST SLOT OF ARRAY HOW TO
- PHP EXPLODE ADDING 0 INTO FIRST SLOT OF ARRAY CODE
Return true //Did set the slot (return/exit) If (global.inventory = iid || global.inventory = item.none) If the tested slot in the inventory is either empty, or contains a matching item id Var inventory_width = ds_grid_width(global.inventory) Var slot = 0 //A temporary variable to loop through the slots / Adds an item and a quantity into the inventory in a valid slot. This second function will be used to add a certain number of items into the inventory automatically, finding an available slot to put the items in. An important note is that at the end of the function, we completely clear the slot if the number of items is less than or equal to 0, this ensures we don't end up with negative items in a slot, and clears it to store a different item later. If the argument override is set to true, the number of items in a slot is set to the input amount, instead of incremented. This is done by modifying the value of global.inventory, which is the amount of items in that slot. }This function will increase and decrease the number of items in a slot (0-9). Clear slot if the amount is less than or equal to 0 Global.inventory = amount //Set amount to input amount Global.inventory += amount //Increase amount by input amountĮlse //If it is overriding current values If (override = false) //If it is not overriding current values / scr_slot_modify_amount(slot, amount, override) Can add and remove items, and set the item. Enumerators (referenced as "enum" in the code), are a list of constants (a variable that never changes), accessible through an enum name. How will you remember if machine gun is 127 or 315?įortunately, there is a way to automate this, and provide us with IDs that are easy to remember, using an enumerator. However, this is annoying because it's so hard to remember a whole bunch of arbitrary numbers, especially with a large number of items. We could assign each item to a number, for example, if we decide apple is 0, and sword is 1, after that, we could just write "0" to reference the apple and "1" to reference the sword. We can't just type "apple" or "sword" for the item ids. These will be a number that is used to reference an item in the code, when assigning a slot to hold an item, when giving players items, when testing to see if the player has items, even when displaying items in the inventory. To do this, we need a few things that will make it possible to access these items.įirst, we need item ids that are specific to each item we add.
PHP EXPLODE ADDING 0 INTO FIRST SLOT OF ARRAY HOW TO
It is designed to give a complete explanation of one, (good) solution to this programming problem, but it assumes you know how to use variables, understand inter-connected systems, and general programming practices. This tutorial will not work for you if you are copying and pasting the code. If you are brand new to Gamemaker you might be able to get it to work by copying my code, but if you start trying to modify it, you will probably end up lost with all sorts of errors.
I have broken the tutorial into several spoiler tabs, to organize the information.įinally, it is important to note that this tutorial is not designed for beginners. However, using these methods, you can make an inventory that is flexible enough to make it easy to add new items, new types of items, and things such as crafting, storage chests, and saving, that does not require you to remember specific details of how it was programmed. It is not the lowest memory solution, or the most efficient.
PHP EXPLODE ADDING 0 INTO FIRST SLOT OF ARRAY CODE
My focus with this inventory code is ease of use. It will include adding new items into the game, modifying inventory slots to contain items, stacking multiple items in one slot, and basics for viewing and interacting with inventory slots, including using items. This tutorial will explain a way to program a highly flexible inventory system in GML.
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