private static MgStorageBlockAllocationInfo GetIndexAllocation(MgtfAccessor accessor)
{
return(new MgStorageBlockAllocationInfo
{
MemoryPropertyFlags = MgMemoryPropertyFlagBits.HOST_COHERENT_BIT,
Usage = MgBufferUsageFlagBits.INDEX_BUFFER_BIT,
Size = accessor.TotalByteSize,
ElementByteSize = accessor.ElementByteSize,
});
}
private static GltfInterleavedOperation GenerateCopyOperation(MgtfAccessor accessor, MgtfBufferView[] bufferViews)
{
if (!accessor.BufferView.HasValue)
{
throw new InvalidOperationException("unable to locate bufferview");
}
var view = bufferViews[accessor.BufferView.Value];
var op = new GltfInterleavedOperation
{
BufferIndex = view.BufferIndex,
Count = accessor.ElementCount,
SrcOffset = (ulong)(view.BufferOffset + accessor.ViewOffset),
TotalSize = (uint)(accessor.ElementCount * accessor.NoOfComponents * accessor.ElementByteSize),
ByteStride = (view.ByteStride.HasValue)
? (uint)view.ByteStride.Value
: accessor.NoOfComponents * accessor.ElementByteSize,
};
return(op);
}
