public unsafe void RawArraySlice()
{
const int memLen = 5;
var mem = stackalloc int[memLen] {
0, 1, 2, 3, 4
};
var array = new RawArray <int>((IntPtr)mem, memLen);
var array03 = new RawArray <int>((IntPtr)mem, 3);
var array22 = new RawArray <int>((IntPtr)(mem + 2), 2);
var array32 = new RawArray <int>((IntPtr)(mem + 3), 2);
AssertEqual(array.Slice(0, array.Length), array);
AssertEqual(array.Slice(0, 3), array03);
AssertEqual(array.Slice(2, 2), array22);
AssertEqual(array.Slice(3, 2), array32);
AssertEqual(array.Slice(3), array32);
AssertEqual(array.Slice(0), array);
Assert.True(array.Slice(5).IsEmpty);
Assert.True(array.Slice(5, 0).IsEmpty);
AssertEqual(array.AsSpan(0, array.Length), array);
AssertEqual(array.AsSpan(0, 3), array03);
AssertEqual(array.AsSpan(2, 2), array22);
AssertEqual(array.AsSpan(3, 2), array32);
AssertEqual(array.AsSpan(3), array32);
AssertEqual(array.AsSpan(0), array);
Assert.True(array.AsSpan(5).IsEmpty);
Assert.True(array.AsSpan(5, 0).IsEmpty);
}
private static void AssertEqual <T>(ReadOnlySpan <T> array1, RawArray <T> array2) where T : unmanaged, IEquatable <T>
{
Assert.True(array1.SequenceEqual(array2.AsSpan()));
}
public MeshGeometry(FbxNode geometryNode)
{
Debug.Assert(geometryNode.IsMeshGeometry());
ID = geometryNode.Properties[0].AsInt64();
Name = geometryNode.Properties[1].AsString();
_positions = default;
_indicesRaw = default;
_normals = default;
NormalReferenceType = default;
NormalMappingType = default;
_normalIndices = default;
_uv = default;
UVReferenceType = default;
UVMappingType = default;
_uvIndices = default;
Materials = default;
foreach (var node in geometryNode.Children)
{
var nodeName = node.Name;
if (nodeName.SequenceEqual(FbxConstStrings.Vertices()))
{
// "Vertices"
_positions = node.Properties[0].AsDoubleArray();
}
else if (nodeName.SequenceEqual(FbxConstStrings.PolygonVertexIndex()))
{
// "PolygonVertexindex"
_indicesRaw = node.Properties[0].AsInt32Array();
}
else if (nodeName.SequenceEqual(FbxConstStrings.LayerElementNormal()))
{
// "LayerElementNormal"
_normals = node.FindChild(FbxConstStrings.Normals()).Properties[0].AsDoubleArray();
var referenceType = node.FindChild(FbxConstStrings.ReferenceInformationType()).Properties[0].AsString();
var mappingType = node.FindChild(FbxConstStrings.MappingInformationType()).Properties[0].AsString();
NormalReferenceType = referenceType.ToReferenceInformationType();
NormalMappingType = mappingType.ToMappingInformationType();
if (NormalReferenceType == ReferenceInformationType.IndexToDirect)
{
_normalIndices = node.FindChild(FbxConstStrings.NormalIndex()).Properties[0].AsInt32Array();
}
}
else if (nodeName.SequenceEqual(FbxConstStrings.LayerElementUV()))
{
// "LayerElementUV"
_uv = node.FindChild(FbxConstStrings.UV()).Properties[0].AsDoubleArray();
var referenceType = node.FindChild(FbxConstStrings.ReferenceInformationType()).Properties[0].AsString();
var mappingType = node.FindChild(FbxConstStrings.MappingInformationType()).Properties[0].AsString();
UVReferenceType = referenceType.ToReferenceInformationType();
UVMappingType = mappingType.ToMappingInformationType();
if (UVReferenceType == ReferenceInformationType.IndexToDirect)
{
_uvIndices = node.FindChild(FbxConstStrings.UVIndex()).Properties[0].AsInt32Array();
}
}
else if (nodeName.SequenceEqual(FbxConstStrings.LayerElementMaterial()))
{
// "LayerElementMaterial"
Materials = node.FindChild(FbxConstStrings.Materials()).Properties[0].AsInt32Array();
}
}
}
