public static Texture2D GenerateHistogramTexture(VolumeTextureLoader dataset)
{
int numSamples = (int)dataset.getHighestHound() + (int)Mathf.Abs(dataset.getLowestHound()) + 1;
int[] values = new int[numSamples];
Color[] cols = new Color[numSamples];
Texture2D texture = new Texture2D(numSamples, 1, TextureFormat.RGBAFloat, false);
int[] data = dataset.getArr();
int maxFreq = 0;
for (int iData = 0; iData < data.Length; iData++)
{
int value = data[iData] + (int)Mathf.Abs(dataset.getLowestHound());
values[value] += 1;
maxFreq = System.Math.Max(values[value], maxFreq);
}
for (int iSample = 0; iSample < numSamples; iSample++)
{
cols[iSample] = new Color(Mathf.Log10((float)values[iSample]) / Mathf.Log10((float)maxFreq), 0.0f, 0.0f, 1.0f);
}
texture.SetPixels(cols);
texture.Apply();
return(texture);
}
public void reloadTexture()
{
currTexture = textLoader.getTexture();
if (currTexture == null)
{
Debug.LogError("Texture not ready");
return;
}
firstLoad = true;
float scaleZ = ((currTexture.depth + 0.0f) / currTexture.height);
transform.localScale = new Vector3(1f, 1f, scaleZ);
render.material.SetTexture("_Volume", currTexture);
render.material.SetFloat("_HoundLow", textLoader.getLowestHound());
render.material.SetFloat("_HoundMax", textLoader.getHighestHound());
Debug.Log("HU Scale -- Low: " + textLoader.getLowestHound() + " Upper: " + textLoader.getHighestHound());
Debug.Log("Scale: " + scaleZ + " dep: " + currTexture.depth + " heigth: " + currTexture.height);
render.material.SetTexture("_Volume", currTexture);
render.material.SetTexture("_NoiseTex", noiseTexture);
}