private void RunSetGeometryInstanceToMainShader(int count,
ref TopLevelAccelerationBuffer bvhBuffer,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryBuffer> objectLvAccGeoBuffers,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryMappingCollectionBuffer> objectLvAccGeoMapBuffers,
ref PrimitiveBuffer primitiveBuffer,
ref WorldToLocalBuffer worldToPrimitiveBuffer,
string[] intersectShaderNames,
ref SortedList <ISIdx, GeometryInstanceBuffer> geoInsBuffers,
ref TopLevelAccelerationGeometryMappingCollectionBuffer topLevelAccGeoMapColBuffer)
{
m_mainShader.SetInt("_NumOfPrimitive", count);
m_mainShader.SetBuffer(kIndex, "_Primitives", primitiveBuffer);
m_mainShader.SetBuffer(kIndex, "_WorldToPrimitives", worldToPrimitiveBuffer);
m_mainShader.SetBuffer(kIndex, "_BVHTree", bvhBuffer);
m_mainShader.SetBuffer(kIndex, "_TopLevelAccelerationGeometryMapping", topLevelAccGeoMapColBuffer);
empty = new ComputeBuffer(1, sizeof(float));
for (int intersectIdx = 0; intersectIdx < intersectShaderNames.Length; intersectIdx++)
{
if (geoInsBuffers.ContainsKey(intersectIdx))
{
m_mainShader.SetBuffer(kIndex, $"_{intersectShaderNames[intersectIdx]}", geoInsBuffers[intersectIdx]);
}
else
{
m_mainShader.SetBuffer(kIndex, $"_{intersectShaderNames[intersectIdx]}", empty);
}
}
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var objectLvAccGeoBuffersIter = objectLvAccGeoBuffers.GetEnumerator();
while (objectLvAccGeoBuffersIter.MoveNext())
{
m_mainShader.SetBuffer(kIndex, $"_{intersectShaderNames[objectLvAccGeoBuffersIter.Current.Key]}GeometryData", objectLvAccGeoBuffersIter.Current.Value);
}
var objectLvAccGeoMapBuffersIter = objectLvAccGeoMapBuffers.GetEnumerator();
while (objectLvAccGeoMapBuffersIter.MoveNext())
{
m_mainShader.SetBuffer(kIndex, $"_{intersectShaderNames[objectLvAccGeoMapBuffersIter.Current.Key]}GeometryMapping", objectLvAccGeoMapBuffersIter.Current.Value);
}
}
private void RunLoadGeometryToBuffer(SceneParseResult sceneParseResult,
ref TopLevelAccelerationBuffer topLevelAcc,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryBuffer> objectLvAccGeoBuffers,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryMappingCollectionBuffer> objectLvAccGeoMapBuffers,
ref PrimitiveBuffer primitiveBuffer,
ref WorldToLocalBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, GeometryInstanceBuffer> gemoetryInstanceBuffers,
ref TopLevelAccelerationGeometryMappingCollectionBuffer topLevelAccGeoMap)
{
LoadBufferWithGeometryInstances(sceneParseResult,
bvhBuffer: ref topLevelAcc,
objectLvAccGeoBuffers: ref objectLvAccGeoBuffers,
objectLvAccGeoMapBuffers: ref objectLvAccGeoMapBuffers,
primitiveBuffer: ref primitiveBuffer,
worldToPrimitiveBuffer: ref worldToPrimitiveBuffer,
gemoetryInstanceBuffers: ref gemoetryInstanceBuffers,
topLevelAccGeoMapColBuffer: ref topLevelAccGeoMap);
}
private void LoadBufferWithGeometryInstances(SceneParseResult sceneParseResult,
ref TopLevelAccelerationBuffer bvhBuffer,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryBuffer> objectLvAccGeoBuffers,
ref SortedList <ISIdx, ObjectLevelAccelerationGeometryMappingCollectionBuffer> objectLvAccGeoMapBuffers,
ref PrimitiveBuffer primitiveBuffer,
ref WorldToLocalBuffer worldToPrimitiveBuffer,
ref SortedList <ISIdx, GeometryInstanceBuffer> gemoetryInstanceBuffers,
ref TopLevelAccelerationGeometryMappingCollectionBuffer topLevelAccGeoMapColBuffer)
{
gemoetryInstanceBuffers.Clear();
objectLvAccGeoBuffers.Clear();
objectLvAccGeoMapBuffers.Clear();
var geoInsIter = sceneParseResult.GeometryInstances.GetEnumerator();
while (geoInsIter.MoveNext())
{
var buffer = new GeometryInstanceBuffer(sceneParseResult.GetGeometryInstancesCount(geoInsIter.Current.Key), sceneParseResult.GetGeometryInstancesStride(geoInsIter.Current.Key));
buffer.SetData(geoInsIter.Current.Value);
gemoetryInstanceBuffers.Add(geoInsIter.Current.Key, buffer);
}
var objectLevelAccGeoIter = sceneParseResult.ObjectLevelAccelerationGeometries.GetEnumerator();
while (objectLevelAccGeoIter.MoveNext())
{
var buffer = new ObjectLevelAccelerationGeometryBuffer(objectLevelAccGeoIter.Current.Value.Count, sizeof(float));
buffer.SetData(objectLevelAccGeoIter.Current.Value);
objectLvAccGeoBuffers.Add(objectLevelAccGeoIter.Current.Key, buffer);
}
var objectLvAccGeoMapIter = sceneParseResult.ObjectLevelAccelerationGeometryMapping.GetEnumerator();
while (objectLvAccGeoMapIter.MoveNext())
{
var buffer = new ObjectLevelAccelerationGeometryMappingCollectionBuffer(objectLvAccGeoMapIter.Current.Value.Count, sizeof(int));
buffer.SetData(objectLvAccGeoMapIter.Current.Value);
objectLvAccGeoMapBuffers.Add(objectLvAccGeoMapIter.Current.Key, buffer);
}
var objectLevelAccStrInsIter = sceneParseResult.ObjectLevelAccelerationStructures.GetEnumerator();
while (objectLevelAccStrInsIter.MoveNext())
{
var buffer = new GeometryInstanceBuffer(objectLevelAccStrInsIter.Current.Value.Count, sizeof(float));
buffer.SetData(objectLevelAccStrInsIter.Current.Value);
gemoetryInstanceBuffers.Add(objectLevelAccStrInsIter.Current.Key, buffer);
}
sceneParseResult.TopLevelBVH.Flatten(
flatten: out List <RTBoundingBoxToGPU> _flattenBVH,
accelerationGeometryMapping: out List <int> _topLevelAccelerationGeometryMapping);
bvhBuffer = new TopLevelAccelerationBuffer(_flattenBVH.Count, RTBoundingBox.stride);
bvhBuffer.SetData(_flattenBVH);
primitiveBuffer = new PrimitiveBuffer(sceneParseResult.Primitives.Count, Primitive.GetStride());
primitiveBuffer.SetData(sceneParseResult.Primitives);
topLevelAccGeoMapColBuffer = new TopLevelAccelerationGeometryMappingCollectionBuffer(_topLevelAccelerationGeometryMapping.Count, sizeof(int));
topLevelAccGeoMapColBuffer.SetData(_topLevelAccelerationGeometryMapping);
worldToPrimitiveBuffer = new WorldToLocalBuffer(sceneParseResult.WorldToPrimitive.Count, sizeof(float) * 16);
worldToPrimitiveBuffer.SetData(sceneParseResult.WorldToPrimitive);
}