Simple bug fix for HistogramTextureGenerator

[kamesa7]

code at GenerateHistogramTextureOnGPU
computeHistogram.SetFloat("ValueRange", (float)(numValues - 1));
should be
computeHistogram.SetFloat("ValueRange", (float)(sampleCount - 1));
With this fix, the histogram can be displayed correctly even for data with a large data range.

[mlavik1]

Hi @kamesa7 ,
You're right, thanks a lot for pointing this out!
I'll have a look at it and make a PR soon.
I guess the histogram texture generation could be made async as well now - instead of blocking the main thread while fetching the compute buffer. I'll have a look at that too.

[mlavik1]

Fixed! Thanks again for reporting.