46 lines
2.3 KiB
Markdown
46 lines
2.3 KiB
Markdown
# APWorld Dev FAQ
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This document is meant as a reference tool to show solutions to common problems when developing an apworld.
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It is not intended to answer every question about Archipelago and it assumes you have read the other docs,
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including [Contributing](contributing.md), [Adding Games](<adding games.md>), and [World API](<world api.md>).
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---
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### My game has a restrictive start that leads to fill errors
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Hint to the Generator that an item needs to be in sphere one with local_early_items. Here, `1` represents the number of "Sword" items to attempt to place in sphere one.
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```py
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early_item_name = "Sword"
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self.multiworld.local_early_items[self.player][early_item_name] = 1
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```
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Some alternative ways to try to fix this problem are:
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* Add more locations to sphere one of your world, potentially only when there would be a restrictive start
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* Pre-place items yourself, such as during `create_items`
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* Put items into the player's starting inventory using `push_precollected`
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* Raise an exception, such as an `OptionError` during `generate_early`, to disallow options that would lead to a restrictive start
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---
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### I have multiple settings that change the item/location pool counts and need to balance them out
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In an ideal situation your system for producing locations and items wouldn't leave any opportunity for them to be unbalanced. But in real, complex situations, that might be unfeasible.
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If that's the case, you can create extra filler based on the difference between your unfilled locations and your itempool by comparing [get_unfilled_locations](https://github.com/ArchipelagoMW/Archipelago/blob/main/BaseClasses.py#:~:text=get_unfilled_locations) to your list of items to submit
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Note: to use self.create_filler(), self.get_filler_item_name() should be defined to only return valid filler item names
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```py
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total_locations = len(self.multiworld.get_unfilled_locations(self.player))
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item_pool = self.create_non_filler_items()
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for _ in range(total_locations - len(item_pool)):
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item_pool.append(self.create_filler())
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self.multiworld.itempool += item_pool
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```
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A faster alternative to the `for` loop would be to use a [list comprehension](https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions):
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```py
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item_pool += [self.create_filler() for _ in range(total_locations - len(item_pool))]
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```
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