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https://github.com/godotengine/godot-demo-projects.git
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6df3667072
- Draw fake reflections for spectrum bars. - Increase the bars' height to better make use of the window space. - Use Compatibility rendering method for greater performance and compatibility. - Update screenshot and icon. - Remove a stray `.import` file.
57 lines
1.4 KiB
GDScript
57 lines
1.4 KiB
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 = 800
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const HEIGHT = 250
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const MIN_DB = 60
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var spectrum
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func _draw():
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@warning_ignore("integer_division")
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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 magnitude = spectrum.get_magnitude_for_frequency_range(prev_hz, hz).length()
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var energy = clampf((MIN_DB + linear_to_db(magnitude)) / MIN_DB, 0, 1)
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var height = energy * HEIGHT
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draw_rect(
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Rect2(w * i, HEIGHT - height, w - 2, height),
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Color.from_hsv(float(VU_COUNT * 0.6 + i * 0.5) / VU_COUNT, 0.5, 0.6)
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)
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draw_line(
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Vector2(w * i, HEIGHT - height),
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Vector2(w * i + w - 2, HEIGHT - height),
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Color.from_hsv(float(VU_COUNT * 0.6 + i * 0.5) / VU_COUNT, 0.5, 1.0),
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2.0,
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true
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)
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# Draw a reflection of the bars with lower opacity.
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draw_rect(
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Rect2(w * i, HEIGHT, w - 2, height),
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Color.from_hsv(float(VU_COUNT * 0.6 + i * 0.5) / VU_COUNT, 0.5, 0.6) * Color(1, 1, 1, 0.125)
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)
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draw_line(
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Vector2(w * i, HEIGHT + height),
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Vector2(w * i + w - 2, HEIGHT + height),
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Color.from_hsv(float(VU_COUNT * 0.6 + i * 0.5) / VU_COUNT, 0.5, 1.0) * Color(1, 1, 1, 0.125),
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2.0,
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true
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)
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prev_hz = hz
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func _process(_delta):
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# Sound plays back continuously, so the graph needs to be updated every frame.
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queue_redraw()
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func _ready():
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spectrum = AudioServer.get_bus_effect_instance(0, 0)
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