using UnityEngine;

[RequireComponent(typeof(Camera), typeof(AudioSource))]
public class AudioVisualizer : MonoBehaviour
{
	/* ... */

	void Update()
	{
		/* ... */

		// Find minimum and maximum value.
		// Use a second array of floats to smooth the animation.
		int sampleLen = samples.Length;
		float minSample = 0.0f;
		float maxSample = 0.0f;
		for(int i = 0; i < sampleLen; ++i)
		{
			// SmoothStep is a variant easing function; could also use Lerp.
			smoothed[i] = Mathf.SmoothStep(smoothed[i],
				samples[i],
				smoothingFactor);
			minSample = Mathf.Min(minSample, smoothed[i]);
			maxSample = Mathf.Max(maxSample, smoothed[i]);
		}

		int barLen = bars.Length;
		float toPercent = 1.0f / (barLen - 1);
		for(int i = 0; i < barLen; ++i)
		{
			// Convert progress through bars array to samples array index.
			float iPercent = i * toPercent;
			int sampleIndex = (int)(iPercent * (sampleLen - 1));

			// Get sample, convert to bar height.
			float sample = smoothed[sampleIndex];
			float barHeight = P5.Map(sample,
				minSample, maxSample,
				barMinHeight, barMaxHeight);
			Vector3 scale = originalBarScale;
			scale.y = barHeight;

			// Get transform, set properties.
			GameObject bar = bars[i];
			Transform tr = bar.GetComponent<Transform>();
			tr.localScale = scale;
		}
	}
}