/// <summary>
/// Initialize the reference volume.
/// </summary>
/// <param name ="allocationSize"> Size used for the chunk allocator that handles bricks.</param>
/// <param name ="memoryBudget">Probe reference volume memory budget.</param>
/// <param name ="indexDimensions">Dimensions of the index data structure.</param>
public void InitProbeReferenceVolume(int allocationSize, ProbeVolumeTextureMemoryBudget memoryBudget, Vector3Int indexDimensions)
{
if (!m_ProbeReferenceVolumeInit)
{
Profiler.BeginSample("Initialize Reference Volume");
m_Pool = new ProbeBrickPool(allocationSize, memoryBudget);
if ((indexDimensions.x * (indexDimensions.y + 1) * indexDimensions.z) == 0)
{
// Give a momentarily dummy size to allow the system to function with no asset assigned.
indexDimensions = new Vector3Int(1, 1, 1);
}
m_Index = new ProbeBrickIndex(indexDimensions);
m_TmpBricks[0] = new List <Brick>();
m_TmpBricks[1] = new List <Brick>();
m_TmpBricks[0].Capacity = m_TmpBricks[1].Capacity = 1024;
// initialize offsets
m_PositionOffsets[0] = 0.0f;
float probeDelta = 1.0f / ProbeBrickPool.kBrickCellCount;
for (int i = 1; i < ProbeBrickPool.kBrickProbeCountPerDim - 1; i++)
{
m_PositionOffsets[i] = i * probeDelta;
}
m_PositionOffsets[m_PositionOffsets.Length - 1] = 1.0f;
Profiler.EndSample();
m_ProbeReferenceVolumeInit = true;
}
m_NeedLoadAsset = true;
}
private void LoadAsset(ProbeVolumeAsset asset)
{
var path = asset.GetSerializedFullPath();
m_AssetPathToBricks[path] = new List <RegId>();
foreach (var cell in asset.cells)
{
// Push data to HDRP
bool compressed = false;
var dataLocation = ProbeBrickPool.CreateDataLocation(cell.sh.Length, compressed, ProbeVolumeSHBands.SphericalHarmonicsL2);
ProbeBrickPool.FillDataLocation(ref dataLocation, cell.sh, ProbeVolumeSHBands.SphericalHarmonicsL2);
// TODO register ID of brick list
List <ProbeBrickIndex.Brick> brickList = new List <ProbeBrickIndex.Brick>();
brickList.AddRange(cell.bricks);
var regId = AddBricks(brickList, dataLocation);
cells[cell.index] = cell;
m_AssetPathToBricks[path].Add(regId);
dataLocation.Cleanup();
}
}
// This is very much modeled to be as close as possible to the way bricks are loaded in the texture pool.
// Not necessarily a good thing.
static void ComputeValidityMasks(BakingCell bakingCell)
{
var bricks = bakingCell.bricks;
var cell = bakingCell;
int chunkSize = ProbeBrickPool.GetChunkSize();
int brickChunksCount = (bricks.Length + chunkSize - 1) / chunkSize;
var probeHasEmptySpaceInGrid = new NativeArray <bool>(bakingCell.probePositions.Length, Allocator.TempJob, NativeArrayOptions.UninitializedMemory);
int chunkIndex = 0;
while (chunkIndex < brickChunksCount)
{
int chunkToProcess = Math.Min(ProbeReferenceVolume.kTemporaryDataLocChunkCount, brickChunksCount - chunkIndex);
Vector3Int locSize = ProbeBrickPool.ProbeCountToDataLocSize(ProbeReferenceVolume.kTemporaryDataLocChunkCount * ProbeBrickPool.GetChunkSizeInProbeCount());
int size = locSize.x * locSize.y * locSize.z;
int startIndex = chunkIndex * ProbeBrickPool.GetChunkSizeInProbeCount();
int count = chunkToProcess * ProbeBrickPool.GetChunkSizeInProbeCount();
int shidx = startIndex;
int bx = 0, by = 0, bz = 0;
s_Validity_locData.Resize(size);
s_ProbeIndices.Resize(size);
Dictionary <Vector3Int, (float, Vector3, Bounds)> probesToRestoreInfo = new Dictionary <Vector3Int, (float, Vector3, Bounds)>();
HashSet <Vector3Int> probesToRestore = new HashSet <Vector3Int>();
for (int brickIdx = startIndex; brickIdx < (startIndex + count); brickIdx += ProbeBrickPool.kBrickProbeCountTotal)
{
for (int z = 0; z < ProbeBrickPool.kBrickProbeCountPerDim; z++)
{
for (int y = 0; y < ProbeBrickPool.kBrickProbeCountPerDim; y++)
{
for (int x = 0; x < ProbeBrickPool.kBrickProbeCountPerDim; x++)
{
int ix = bx + x;
int iy = by + y;
int iz = bz + z;
if (shidx >= cell.validity.Length)
{
StoreScratchData(ix, iy, iz, locSize.x, locSize.y, 1.0f, shidx);
}
else
{
StoreScratchData(ix, iy, iz, locSize.x, locSize.y, ProbeReferenceVolume.Cell.GetValidityFromPacked(cell.validity[shidx]), shidx);
// Check if we need to do some extra check on this probe.
bool hasFreeNeighbourhood = false;
Bounds invalidatingTouchupBound;
if (s_ForceInvalidatedProbesAndTouchupVols.TryGetValue(cell.probePositions[shidx], out invalidatingTouchupBound))
{
int actualBrickIdx = brickIdx / ProbeBrickPool.kBrickProbeCountTotal;
float brickSize = ProbeReferenceVolume.CellSize(cell.bricks[actualBrickIdx].subdivisionLevel);
Vector3 position = cell.probePositions[shidx];
probesToRestore.Add(new Vector3Int(ix, iy, iz));
var searchDistance = (brickSize * m_BakingProfile.minBrickSize) / ProbeBrickPool.kBrickCellCount;
hasFreeNeighbourhood = NeighbourhoodIsEmptySpace(position, searchDistance, invalidatingTouchupBound);
}
probeHasEmptySpaceInGrid[shidx] = hasFreeNeighbourhood;
}
shidx++;
}
}
}
// update the pool index
bx += ProbeBrickPool.kBrickProbeCountPerDim;
if (bx >= locSize.x)
{
bx = 0;
by += ProbeBrickPool.kBrickProbeCountPerDim;
if (by >= locSize.y)
{
by = 0;
bz += ProbeBrickPool.kBrickProbeCountPerDim;
}
}
}
for (int x = 0; x < locSize.x; ++x)
{
for (int y = 0; y < locSize.y; ++y)
{
for (int z = 0; z < locSize.z; ++z)
{
int outIdx = ReadProbeIndex(x, y, z, locSize.x, locSize.y);
float probeValidity = ReadValidity(x, y, z, locSize.x, locSize.y);
if (outIdx < cell.validity.Length)
{
float[] validities = new float[8];
bool forceAllValid = false;
for (int o = 0; o < 8; ++o)
{
Vector3Int off = GetSampleOffset(o);
Vector3Int samplePos = new Vector3Int(Mathf.Clamp(x + off.x, 0, locSize.x - 1),
Mathf.Clamp(y + off.y, 0, locSize.y - 1),
Mathf.Clamp(z + off.z, 0, ProbeBrickPool.kBrickProbeCountPerDim - 1));
if (probesToRestore.Contains(samplePos))
{
if (probeHasEmptySpaceInGrid[outIdx])
{
forceAllValid = true;
}
}
validities[o] = ReadValidity(samplePos.x, samplePos.y, samplePos.z, locSize.x, locSize.y);
}
byte mask = forceAllValid ? (byte)255 : Convert.ToByte(PackValidity(validities));
float validity = probeValidity;
cell.validity[outIdx] = ProbeReferenceVolume.Cell.PackValidityAndMask(validity, mask);
}
}
}
}
chunkIndex += ProbeReferenceVolume.kTemporaryDataLocChunkCount;
}
probeHasEmptySpaceInGrid.Dispose();
}