ClusteringTextures.cs

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using UnityEngine;
 
/// <summary>
/// Call <see cref="Dispose" /> after using.
/// </summary>
public class ClusteringTextures : System.IDisposable
{
    public readonly RenderTexture rtInput;
    public readonly RenderTexture rtArr;
 
    public int mipLevel
    {
        get
        {
            {
                int mipLevel = 0;
                int targetSize = 1;
                while (targetSize != this.size)
                {
                    mipLevel++;
                    targetSize *= 2;
                }
                return mipLevel;
            }
        }
    }
 
    private RenderTexture MakeRtArr(int textureSize)
    {
        var rtDesc = new RenderTextureDescriptor(
            textureSize,
            textureSize,
            RenderTextureFormat.ARGBFloat,
            0
        )
        {
            dimension = UnityEngine.Rendering.TextureDimension.Tex2DArray,
            volumeDepth = ClusteringTest.maxNumClusters,
            useMipMap = true,
            autoGenerateMips = false
        };
 
        return new RenderTexture(rtDesc) { enableRandomWrite = true };
    }
 
    public ClusteringTextures(int size)
    {
        this.rtInput = new RenderTexture(size, size, 0, RenderTextureFormat.ARGBFloat)
        {
            enableRandomWrite = true
        };
 
        this.rtArr = this.MakeRtArr(size);
    }
 
    public int size => this.rtInput.width;
 
    public void Dispose()
    {
        this.rtInput.Release();
        this.rtArr.Release();
    }
}