Class LightProbeAtlasPacker

Namespace: ValveResourceFormat.Renderer.Utils
Assembly: Renderer.dll

Packs light probe volume grids into a single 3D atlas. All sizes are in probes, matching the direct light textures. The irradiance texture is six times deeper (one slice per ambient cube face), which the caller accounts for.

public static class LightProbeAtlasPacker

Inheritance

object ← LightProbeAtlasPacker

Remarks

Slots are aligned to 4 in X and Y so block compressed textures can be copied block by block. No padding is needed between slots because the shader clamps lookups half a probe inside each volume.

Fields

BlockSize

Slot alignment in X and Y, the size of a compressed block.

public const int BlockSize = 4

Field Value

int

Methods

Pack(IReadOnlyList<(int Width, int Height, int Depth)>, int, int, out (int Width, int Height, int Depth))

Packs grids into an atlas within the given size limits.

public static LightProbeAtlasSlot?[] Pack(IReadOnlyList<(int Width, int Height, int Depth)> sizes, int maxSide, int maxDepth, out (int Width, int Height, int Depth) atlasSize)

Parameters

sizes IReadOnlyList<(int Width, int Height, int Depth)>

Grid sizes, in probes.

maxSide int

Maximum atlas width and height.

maxDepth int

Maximum atlas depth.

atlasSize (int Width, int Height, int Depth)

Resulting atlas size, in probes.

Returns

LightProbeAtlasSlot?[]

Slot per grid in the same order as sizes, null where a grid did not fit.