protected override void OnValidateReferences(Validation.ValidationContext result)
{
base.OnValidateReferences(result);
result.CheckArrayIndexAccess(nameof(Buffer), _buffer, this.LogicalParent.LogicalBuffers);
result.CheckSchemaNonNegative("ByteOffset", _byteOffset);
result.CheckSchemaIsInRange("ByteLength", _byteLength, _byteLengthMinimum, int.MaxValue);
// ByteStride must be multiple of 4, between 4 and 252
if (_byteStride.HasValue)
{
result.CheckSchemaIsInRange(nameof(ByteStride), _byteStride.Value, _byteStrideMinimum, _byteStrideMaximum);
result.CheckSchemaIsMultipleOf(nameof(ByteStride), _byteStride.Value, 4);
}
}
internal static void CheckAccess(Validation.ValidationContext result, BufferView bv, int accessorByteOffset, DimensionType dim, EncodingType enc, bool nrm, int count)
{
if (nrm)
{
if (enc != EncodingType.UNSIGNED_BYTE && enc != EncodingType.UNSIGNED_SHORT)
{
result.AddDataError("Normalized", "Only (u)byte and (u)short accessors can be normalized.");
}
}
var elementByteSize = dim.DimCount() * enc.ByteLength();
if (bv.IsVertexBuffer)
{
if (bv.ByteStride == 0)
{
result.CheckSchemaIsMultipleOf("ElementByteSize", elementByteSize, 4);
}
}
if (bv.IsIndexBuffer)
{
if (dim != DimensionType.SCALAR)
{
result.AddLinkError(("BufferView", bv.LogicalIndex), $"is an IndexBuffer, but accessor dimensions is: {dim}");
}
if (enc == EncodingType.BYTE)
{
result.AddLinkError(("BufferView", bv.LogicalIndex), $"is an IndexBuffer, but accessor encoding is (s)byte");
}
if (enc == EncodingType.SHORT)
{
result.AddLinkError(("BufferView", bv.LogicalIndex), $"is an IndexBuffer, but accessor encoding is (s)short");
}
if (enc == EncodingType.FLOAT)
{
result.AddLinkError(("BufferView", bv.LogicalIndex), $"is an IndexBuffer, but accessor encoding is float");
}
if (nrm)
{
result.AddLinkError(("BufferView", bv.LogicalIndex), $"is an IndexBuffer, but accessor is normalized");
}
}
if (bv.ByteStride > 0)
{
if (bv.ByteStride < elementByteSize)
{
result.AddLinkError("ElementByteSize", $"Referenced bufferView's byteStride value {bv.ByteStride} is less than accessor element's length {elementByteSize}.");
}
// "Accessor's total byteOffset {0} isn't a multiple of componentType length {1}.";
return;
}
var accessorByteLength = bv.GetAccessorByteLength(dim, enc, count);
// "Accessor(offset: {0}, length: {1}) does not fit referenced bufferView[% 3] length %4.";
result.CheckArrayRangeAccess(("BufferView", bv.LogicalIndex), accessorByteOffset, accessorByteLength, bv.Content);
}