48 lines
1.5 KiB
GDScript3
48 lines
1.5 KiB
GDScript3
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extends Control
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# A wheel that can be rotated by the player.
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# Detects the angle of the wheel and emits a signal when the wheel is rotated.
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# The value might be positive or negative, and the negative value means the wheel is rotated in clockwise.
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signal rotated(radiant: float)
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@export var enabled := true:
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set(val):
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enabled = val
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dragging = false
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@export var min_angle := 30.0
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@export var one_direction := true
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@export var clockwise := true
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var start_pos := Vector2.ZERO
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var dragging := false
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func _input(event: InputEvent) -> void:
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if not enabled:
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return
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if event is InputEventMouseButton:
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if event.button_index == MOUSE_BUTTON_LEFT:
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if event.pressed:
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start_pos = event.position
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dragging = true
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else:
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dragging = false
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# print("mouse button")
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elif event is InputEventMouseMotion:
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if dragging:
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var current_pos = event.position
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# current node's viewport position
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var origin := get_viewport().global_canvas_transform * global_position
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# Calculate the angle between the start_pos and the current_pos around the origin.
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var radiant = (current_pos - origin).angle_to(start_pos - origin)
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var min_rad = min_angle * PI / 180
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if abs(radiant) > min_rad:
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# check if the wheel is rotated in the correct direction
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if one_direction:
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if (clockwise and radiant > 0) or (not clockwise and radiant < 0):
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start_pos = current_pos
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return
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rotated.emit(radiant)
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start_pos = current_pos
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# print(radiant, current_pos)
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