37 lines
743 B
GDScript
37 lines
743 B
GDScript
extends Node2D
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const VU_COUNT=16
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const FREQ_MAX = 11050.0
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const WIDTH = 400
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const HEIGHT = 100
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const MIN_DB = 60
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var spectrum
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func _draw():
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var w = WIDTH / VU_COUNT
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var prev_hz = 0
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for i in range(1,VU_COUNT+1):
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var hz = i * FREQ_MAX / VU_COUNT;
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var f = spectrum.get_magnitude_for_frequency_range(prev_hz,hz)
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var energy = clamp((MIN_DB + linear2db(f.length()))/MIN_DB,0,1)
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#print("db ",db,": ",f.length())
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var height = energy * HEIGHT
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draw_rect(Rect2(w*i,HEIGHT-height,w,height),Color(1,1,1))
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prev_hz = hz
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func _process(delta):
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update()
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func _ready():
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spectrum = AudioServer.get_bus_effect_instance(0,0)
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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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# pass
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