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This commit is contained in:
BobSong
2026-01-01 22:00:33 +08:00
parent 040a222bd6
commit 9ceffccd39
1800 changed files with 103929 additions and 139495 deletions
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30
Assets/Obi/Scripts/Common/Backends/Burst/DataStructures/NativeMultilevelGrid.cs
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@@ -23,9 +23,7 @@ namespace Obi
public unsafe struct NativeMultilevelGrid<T> : IDisposable where T : unmanaged, IEquatable<T>
{
public const float minSize = 0.01f; // minimum cell size is 1 centimeter, enough for very small particles.
public const int minLevel = -6; // grid level for minSize.
public const int maxLevel = 17;
public const float minSize = 0.01f;
/**
* A cell in the multilevel grid. Coords are 4-dimensional, the 4th component is the grid level.
@@ -60,7 +58,7 @@ namespace Obi
{
get
{
return contents.ElementAt(index);
return UnsafeUtility.ReadArrayElement<K>(contents.Ptr, index);
}
}
@@ -71,7 +69,11 @@ namespace Obi
public bool Remove(K entity)
{
int index = contents.IndexOf(entity);
//int index = contents.IndexOf(entity);
int index = -1;
for (int i = 0; i < contents.Length; ++i)
if (contents[i].Equals(entity)) { index = i; break; }
if (index >= 0)
{
contents.RemoveAtSwapBack(index);
@@ -86,15 +88,15 @@ namespace Obi
}
}
public NativeParallelHashMap<int4, int> grid;
public NativeHashMap<int4, int> grid;
public NativeList<Cell<T>> usedCells;
public NativeParallelHashMap<int, int> populatedLevels;
public NativeHashMap<int, int> populatedLevels;
public NativeMultilevelGrid(int capacity, Allocator label)
{
grid = new NativeParallelHashMap<int4, int>(capacity, label);
grid = new NativeHashMap<int4, int>(capacity, label);
usedCells = new NativeList<Cell<T>>(label);
populatedLevels = new NativeParallelHashMap<int, int>(10, label);
populatedLevels = new NativeHashMap<int, int>(10, label);
}
public int CellCount
@@ -170,16 +172,14 @@ namespace Obi
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int GridLevelForSize(float size)
{
// the magic number is 1/log(2), used because log_a(x) = log_b(x) / log_b(a)
// level is clamped between MIN_LEVEL and MAX_LEVEL, then remapped to (0, MAX_LEVEL - MIN_LEVEL)
// this allows us to avoid InterlockedMax issues on GPU, since it doesn't work on negative numbers on some APIs.
return math.clamp((int)math.ceil(math.log(size) * 1.44269504089f), minLevel, maxLevel) - minLevel;
// the magic number is 1/log(2)
return (int)math.ceil(math.log(math.max(size,minSize)) * 1.44269504089f);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static float CellSizeOfLevel(int level)
{
return math.exp2(level + minLevel);
return math.exp2(level);
}
/**
@@ -187,7 +187,7 @@ namespace Obi
*/
public static int4 GetParentCellCoords(int4 cellCoords, int level)
{
float decimation = math.exp2(level - cellCoords[3]);
float decimation = CellSizeOfLevel(level - cellCoords[3]);
int4 cell = (int4)math.floor((float4)cellCoords / decimation);
cell[3] = level;
return cell;