28 lines
716 B
GDScript
28 lines
716 B
GDScript
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extends Node2D
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export var target = Vector2 (0, 0)
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export var pos = Vector2 (0, 0)
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export var max_speed = 50
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export var spring_k = 10
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export var spring_b = 0.5
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var velocity = Vector2(0, 0)
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const pos_error_eps = 0.01
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signal position_updated
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# Called when the node enters the scene tree for the first time.
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func _ready():
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pass # Replace with function body.
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# Called every frame. 'delta' is the elapsed time since the previous frame.
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func _process(delta):
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if (target - pos).length_squared() > pos_error_eps * pos_error_eps:
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var acceleration = spring_k * (target - pos) - spring_b * velocity
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velocity = velocity + acceleration * delta
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pos = pos + velocity * delta
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emit_signal("position_updated", pos)
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