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Implement interleaved vertex layout with byteStride

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ousttrue
2022-12-05 20:06:49 +09:00
parent fcb4f1841f
commit 3b73ba2e9b
1 changed files with 22 additions and 1 deletions
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23
Assets/UniGLTF/Runtime/UniGLTF/IO/GltfData.cs
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@@ -166,7 +166,28 @@ namespace UniGLTF
NativeArray<T> GetTypedFromAccessor<T>(glTFAccessor accessor, glTFBufferView view) where T : struct
{
var bytes = GetBytesFromBufferView(view);
return bytes.GetSubArray(accessor.byteOffset.GetValueOrDefault(), bytes.Length - accessor.byteOffset.GetValueOrDefault()).Reinterpret<T>(1).GetSubArray(0, accessor.count);
if (view.byteStride == 0 || view.byteStride == accessor.GetStride())
{
// planar layout
return bytes.GetSubArray(
accessor.byteOffset.GetValueOrDefault(),
accessor.CalcByteSize()).Reinterpret<T>(1);
}
else
{
// interleaved layout
// copy interleaved vertex to planar array
var src = GetBytesFromBufferView(view);
var dst = NativeArrayManager.CreateNativeArray<T>(accessor.count);
var offset = accessor.byteOffset.GetValueOrDefault();
var size = Marshal.SizeOf<T>();
for (int i = 0; i < accessor.count; ++i, offset += view.byteStride)
{
var values = src.GetSubArray(offset, size).Reinterpret<T>(1);
dst[i] = values[0];
}
return dst;
}
}
/// <summary>