93 lines
2.5 KiB
GDScript
93 lines
2.5 KiB
GDScript
extends Node
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## Loads modifier definitions and serves them by id.
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##
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## ⚠️ PROTOTYPE. This is scaffolding, not the real mod loader.
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##
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## What's wrong with it, to be fixed in Phase 3:
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## - DirAccess cannot walk into a PCK. This works in the editor and silently
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## returns NOTHING in an exported build. Needs a build-time manifest.
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## - No namespacing. Ids are bare strings, so two mods can collide.
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## - No mod.json, no api_version, no dependency resolution.
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## - Only reads content/official/. Doesn't touch user://mods/.
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##
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## Autoload name is ModRegistry (PascalCase), so call sites read as
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## ModRegistry.get_by_id(...) rather than looking like a local variable.
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const MODIFIER_DIR := "res://content/official/modifiers/"
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var modifiers: Array[Modifier] = []
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var _by_id: Dictionary = {}
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func _ready() -> void:
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_load_from_folder(MODIFIER_DIR)
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_reindex()
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print("ModRegistry: loaded %d modifiers." % modifiers.size())
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## Recursive, because each modifier now lives in its own folder:
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## modifiers/mjolnir/mjolnir.tres
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func _load_from_folder(path: String) -> void:
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var dir := DirAccess.open(path)
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if dir == null:
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push_warning("ModRegistry: can't open %s" % path)
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return
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dir.list_dir_begin()
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var fname := dir.get_next()
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while fname != "":
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var full := path.path_join(fname)
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if dir.current_is_dir():
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if not fname.begins_with("."):
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_load_from_folder(full)
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elif fname.ends_with(".tres"):
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var res := load(full)
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if res is Modifier:
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modifiers.append(res)
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else:
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push_warning("ModRegistry: %s is not a Modifier" % full)
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fname = dir.get_next()
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dir.list_dir_end()
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func _reindex() -> void:
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_by_id.clear()
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for m in modifiers:
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if m.id.is_empty():
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push_warning("ModRegistry: modifier with empty id, skipping.")
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continue
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if _by_id.has(m.id):
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push_warning("ModRegistry: duplicate id '%s'." % m.id)
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_by_id[m.id] = m
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func get_by_id(id: String) -> Modifier:
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return _by_id.get(id)
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## Pick `count` distinct modifiers, weighted by rarity.
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func pick_random(count: int) -> Array[Modifier]:
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var pool := modifiers.duplicate()
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var chosen: Array[Modifier] = []
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count = mini(count, pool.size())
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for _i in count:
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var total := 0.0
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for m in pool:
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total += maxf(m.weight, 0.0001)
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var r := randf() * total
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var acc := 0.0
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var picked := 0
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for j in pool.size():
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acc += maxf(pool[j].weight, 0.0001)
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if r <= acc:
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picked = j
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break
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chosen.append(pool[picked])
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pool.remove_at(picked) # distinct — don't offer the same one twice
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return chosen
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