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48 lines
1.2 KiB
GDScript
48 lines
1.2 KiB
GDScript
@icon("res://behaviours/sampler.svg")
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extends Node
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class_name Sampler
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## Abstract base class for sampling a certain reference among multiple.
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## [Array] of [Node]s that can be [func sample]d by this [Sampler].
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@export var possibilities: Array[Node] = []
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## If true, the [Sampler] will attempt to automatically [method sample_and_enable] on NOTIFICATION_READY.
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@export var autoenable_on_ready: bool = true
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var selected: Node = null;
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## Get a reference.
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func sample() -> Node:
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Log.e(self, "Not implemented.")
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return null
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## Set the [field enabled] property to true on a [method sample]d node, and to false on all others.
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func sample_and_enable() -> void:
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set_enabled(sample())
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func set_enabled(node: Node) -> void:
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if node == selected:
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return
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selected = node
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var selected_ref = get_ref(selected)
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for possibility in get_all_refs():
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possibility.enabled = (selected_ref == possibility)
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func get_ref(node: Node) -> Node:
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return node
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## Get all possible nodes referenced by [field possibilities].
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##
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## Useful as it may be overridden by some other [Sampler]s, such as [SamplerPriority].
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func get_all_refs() -> Array[Node]:
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return possibilities
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func _ready() -> void:
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if autoenable_on_ready:
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sample_and_enable.call_deferred()
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