-
-
Save nndwn/319b0252744108463c0e305028c0813f to your computer and use it in GitHub Desktop.
Unity sound wave using line renderers
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
using UnityEngine; | |
using System.Collections; | |
using System.Collections.Generic; | |
using System.Linq; | |
/// Creates a wave form based on an audiosource | |
/// Modified version of http://forum.unity3d.com/threads/making-sense-of-spectrum-data.90262 | |
/// Make sure to plug in the _topLine and _bottomLine line renderers | |
public class WaveGenerator : MonoBehaviour | |
{ | |
AudioSource _audioSource; | |
const int SpectrumSize = 8192; | |
readonly float[] _spectrum = new float[SpectrumSize]; | |
public LineRenderer _topLine; | |
public LineRenderer _bottomLine; | |
public void Start() | |
{ | |
_audioSource = GetComponent<AudioSource>(); | |
} | |
public void Update() | |
{ | |
_audioSource.GetSpectrumData(_spectrum, 0, FFTWindow.BlackmanHarris); | |
var bandSize = 1.1f; | |
var crossover = bandSize; | |
var viewSpectrum = new List<float>(); | |
var b = 0f; | |
for (var i = 0; i < SpectrumSize; i++) | |
{ | |
var d = _spectrum[i]; | |
b = Mathf.Max(d, b); // find the max as the peak value in that frequency band. | |
if (i > crossover - 3) | |
{ | |
crossover *= bandSize; // frequency crossover point for each band. | |
viewSpectrum.Add(b); | |
b = 0; | |
} | |
} | |
SetLinePoints(viewSpectrum, _topLine); | |
SetLinePoints(viewSpectrum, _bottomLine, -1); | |
} | |
private void SetLinePoints(List<float> viewSpectrum, LineRenderer lineRenderer, float modifier = 1) | |
{ | |
var pointDistance = 0.1f; | |
var width = pointDistance*viewSpectrum.Count; | |
lineRenderer.positionCount = viewSpectrum.Count; | |
lineRenderer.SetPositions(viewSpectrum.Select((x, i) => new Vector3(-width/2 + i*pointDistance, x*34*modifier)).ToArray()); | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment