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);
}
