| Parameter | Description |
|---|---|
| context | Device context for computation and memory operations. |
| positionOffset | Starting index in the probe position buffer. |
| positionCount | Number of probe positions to process. |
| sampleCount | Number of directional samples to take per probe. |
| maxLightsPerProbe | Maximum number of lights to compute occlusion for per probe (typically 4). |
| perProbeLightIndices | Buffer containing light indices for each probe, computed using InputExtraction.ComputeOcclusionLightIndicesFromBakeInput. |
| probeOcclusionEstimateOut | Output buffer for occlusion values. Size must be positionCount × maxLightsPerProbe × sizeof(float). |
Result Result indicating success or failure with detailed error information.
Computes occlusion values for mixed lighting scenarios with shadowmask support.
This method computes occlusion factors for mixed lights at each probe position. Mixed lights are lights that provide both real-time dynamic lighting and baked shadows through shadowmasks.
The occlusion calculation:
The light indices can be precomputed using InputExtraction.ComputeOcclusionLightIndicesFromBakeInput to select the most influential lights for each probe position.
Additional resources: InputExtraction.ComputeOcclusionLightIndicesFromBakeInput, InputExtraction.GetShadowmaskChannelsFromLightIndices.
// Compute light indices for occlusion var probePositions = GetProbePositions(); // Vector3[] var lightIndices = InputExtraction.ComputeOcclusionLightIndicesFromBakeInput(bakeInput, probePositions, 4);
// Create buffer for light indices BufferID lightIndexBuffer = context.CreateBuffer((ulong)(probePositions.Length * 4), sizeof(int)); var lightIndexSlice = new BufferSlice<int>(lightIndexBuffer, 0); context.WriteBuffer(lightIndexSlice, new NativeArray<int>(lightIndices, Allocator.Temp));
// Create output buffer for occlusion values BufferID occlusionBuffer = context.CreateBuffer((ulong)(probePositions.Length * 4), sizeof(float)); var occlusionSlice = new BufferSlice<float>(occlusionBuffer, 0);
// Compute occlusion var result = integrator.IntegrateOcclusion(context, 0, probePositions.Length, 512, 4, lightIndexSlice, occlusionSlice);
Assert.AreEqual(IProbeIntegrator.ResultType.Success, result.type);