/// <inheritdoc/>
public override void Process(GridBuffer buffer, int channel)
{
// Side length of squares around points required for filling
// Width x Height, IF positions were distributed evenly.
float sparseness = Mathf.Sqrt(Width * Height / (float)GridPositions.Count);
if (sparseness > 1)
{
sparseness *= c_Multiplier;
foreach (Vector2Int pGrid in GridPositions)
{
int xGrid = pGrid.x;
int yGrid = pGrid.y;
float proximity = m_AuxGrid.Read(0, xGrid, yGrid);
// Get matching kernel size for current proximity and point sparseness.
var kernel = m_Kernels[Mathf.Min(Mathf.RoundToInt(sparseness * proximity), c_MaxRadius - 1)];
float bufferValue = buffer.Read(channel, xGrid, yGrid);
foreach (var pKernel in kernel)
{
int xDilate = xGrid + pKernel.x;
int yDilate = yGrid + pKernel.y;
// TryRead -> Dilation area might go beyond grid size.
if (m_AuxGrid.TryRead(1, xDilate, yDilate, out float kernelValue))
{
// Occlusion, 3D specific:
// Write maximum kernel value if already set.
m_AuxGrid.Write(1, xDilate, yDilate, Mathf.Max(pKernel.value, kernelValue));
// Write maximum buffer value if already set.
m_AuxGrid.Write(2, xDilate, yDilate, Mathf.Max(m_AuxGrid.Read(2, xDilate, yDilate), bufferValue));
Expand(xDilate, yDilate);
}
}
}
// Expanded area.
for (int x = m_xMin; x <= m_xMax; x++)
{
for (int y = m_yMin; y <= m_yMax; y++)
{
if (m_AuxGrid.Read(1, x, y) > c_Threshold)
{
// Copy back dilated buffer values.
buffer.Write(channel, x, y, m_AuxGrid.Read(2, x, y));
// Store for later Write(buffer, channel, value) call.
GridPositions.Add(new Vector2Int(x, y));
}
}
}
}
// else: keep original positions, they're dense enough.
}
/// <inheritdoc/>
public override void Process(GridBuffer buffer, int channel)
{
// Side length of squares around points required for filling
// Width x Height, IF positions were distributed evenly.
float sparseness = Mathf.Sqrt(Width * Height / (float)GridPositions.Count);
if (sparseness > 1)
{
// Make downsample area a bit larger than
// sparseness value in order to prevent gaps.
int size = Mathf.RoundToInt(sparseness) + 2; // TBD pad
// Bottom/left offset.
int xOffset = m_xMin - (size - Width % size) / 2;
int yOffset = m_yMin - (size - Height % size) / 2;
int nx = 0, ny = 0;
foreach (Vector2Int point in GridPositions)
{
// Downsampling: grid pos -> sample pos.
int xSample = (point.x - xOffset) / size;
int ySample = (point.y - yOffset) / size;
nx = Mathf.Max(nx, xSample);
ny = Mathf.Max(ny, ySample);
m_Samples[xSample, ySample] = Mathf.Max(
m_Samples[xSample, ySample], buffer.Read(channel, point));
}
// Replace grid points with squares (size x size).
GridPositions.Clear();
for (int xSample = 0; xSample <= nx; xSample++)
{
for (int ySample = 0; ySample <= ny; ySample++)
{
float sampleValue = m_Samples[xSample, ySample];
if (sampleValue > 0)
{
// Upscaling: sample pos -> grid pos.
int xGrid = xOffset + xSample * size;
int yGrid = yOffset + ySample * size;
for (int x = 0; x < size; x++)
{
for (int y = 0; y < size; y++)
{
Vector2Int gridPos = new Vector2Int(xGrid + x, yGrid + y);
// TryRead -> Square might go beyond grid size.
if (buffer.TryRead(channel, gridPos, out float bufferValue))
{
// Occlusion, 3D specific:
// Write maximum buffer value if already set.
buffer.Write(channel, gridPos, Mathf.Max(bufferValue, sampleValue));
// Store for later Write(buffer, channel, value) call.
GridPositions.Add(gridPos);
}
}
}
}
}
}
}
// else: keep original positions, they're dense enough.
}