private void BuildTexure(List <Vector2> samples)
{
if (texturePixels == null || texturePixels.Length != IMAGE_LENGTH * IMAGE_LENGTH || lights == null || sampleWeights == null || sampleWeights.Length != IMAGE_LENGTH * IMAGE_LENGTH)
{
Initialize();
}
Vector2 center = new Vector2(.5f, .5f);
int samplesAAexp = aaQuality;
float pixelLength = 1f / IMAGE_LENGTH;
foreach (Vector2 sample in samples)
{
int x = Mathf.Clamp((int)(sample.x * IMAGE_LENGTH), 0, IMAGE_LENGTH - 1);
int y = Mathf.Clamp((int)(sample.y * IMAGE_LENGTH), 0, IMAGE_LENGTH - 1);;
List <Vector2> aaSamples = Stochastic.GetStratifiedUniformGrid(samplesAAexp, samplesAAexp);
Color pixel = Color.black;
foreach (Vector2 aa in aaSamples)
{
Vector2 p = sample + aa * pixelLength;
if ((p - center).magnitude < .5f)
{
pixel += RenderPixel((p - center) / .5f) / aaSamples.Count;
}
else
{
// Background pixel
Vector2 dirToPoint = p - center;
Vector2 edge = dirToPoint.normalized;
//pixel += RenderPixel(edge *.999f) / aaSamples.Count;
}
}
Color previousColor = texturePixels[y * IMAGE_LENGTH + x];
float previousWeight = sampleWeights[y * IMAGE_LENGTH + x];
sampleWeights[y * IMAGE_LENGTH + x] += 1f;
if (previousWeight > 0.0001f)
{
texturePixels[y * IMAGE_LENGTH + x] = ((previousColor * previousWeight) + pixel) / (previousWeight + 1f);
}
else
{
texturePixels[y * IMAGE_LENGTH + x] = pixel;
}
}
}
public void Update()
{
if (previewMode)
{
int previewSamples = (int)(IMAGE_LENGTH);
BuildTexure(Stochastic.GetStratifiedUniformGrid(previewSamples, previewSamples));
updateCounter++;
if (updateCounter > 1)
{
sphereMap.SetPixels(texturePixels);
sphereMap.Apply();
updateCounter = 0;
}
}
}
