55 lines
1.1 KiB
GDScript
55 lines
1.1 KiB
GDScript
class_name EnergyComponent
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extends Node
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signal energy_changed(current: int, maximum: int)
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@export var maximum := 10
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@export var current := 0
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func _ready() -> void:
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_emit_changed()
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func set_values(next_current: int, next_maximum: int) -> void:
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maximum = max(1, next_maximum)
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current = clampi(next_current, 0, maximum)
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_emit_changed()
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func set_current(next_current: int) -> void:
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var clamped := clampi(next_current, 0, maximum)
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if clamped == current:
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return
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current = clamped
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_emit_changed()
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func change(delta: int) -> void:
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set_current(current + delta)
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func spend(cost: float) -> bool:
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var int_cost := int(ceil(cost))
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if int_cost <= 0:
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return true
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if current < int_cost:
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return false
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set_current(current - int_cost)
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return true
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func _emit_changed() -> void:
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energy_changed.emit(current, maximum)
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_event_bus().emit_signal("player_energy_changed", float(current), float(maximum))
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func _event_bus() -> Node:
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var root := get_tree().root
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var bus := root.get_node_or_null("EventBus")
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if bus == null:
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bus = load("res://autoload/event_bus.gd").new()
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bus.name = "EventBus"
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root.add_child(bus)
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return bus
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