public static void LoadFbx(string path, ref Vector3[] positions, ref Vector3[] normals, ref Vector2[] texCoords,
ref int[] vertexIndices)
{
var isBinary = FbxIO.IsBinaryFbx(path);
var documentNode = FbxIO.Read(path);
// Scale factor usually 1 or 2.54
var scaleFactor = documentNode.GetScaleFactor();
var geometryIds = documentNode.GetGeometryIds();
var fbxIndexer = new FbxIndexer();
foreach (var geometryId in geometryIds)
{
vertexIndices = documentNode.GetVertexIndices(geometryId);
long[] normalLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Normal);
long[] tangentLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Tangent);
long[] binormalLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Binormal);
long[] texCoordLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.TexCoord);
long[] materialLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Material);
positions = documentNode.GetPositions(geometryId, vertexIndices);
normals = documentNode.GetNormals(geometryId, vertexIndices, normalLayerIndices[0]);
texCoords = documentNode.GetTexCoords(geometryId, vertexIndices, texCoordLayerIndices[0]);
int[] materials = documentNode.GetMaterials(geometryId, vertexIndices, materialLayerIndices[0]);
bool hasNormals = documentNode.GetGeometryHasNormals(geometryId);
bool hasTexCoords = documentNode.GetGeometryHasTexCoords(geometryId);
bool hasTangents = documentNode.GetGeometryHasTangents(geometryId);
bool hasBinormals = documentNode.GetGeometryHasBinormals(geometryId);
bool hasMaterials = documentNode.GetGeometryHasMaterials(geometryId);
Vector3[] tangents = Array.Empty <Vector3>();
Vector3[] binormals = Array.Empty <Vector3>();
if (hasTangents)
{
tangents = documentNode.GetTangents(geometryId, vertexIndices, tangentLayerIndices[0]);
}
if (hasBinormals)
{
binormals = documentNode.GetBinormals(geometryId, vertexIndices, binormalLayerIndices[0]);
}
for (var i = 0; i < positions.Length; i++)
{
var vertex = new FbxVertex
{
Position = positions[i],
Normal = hasNormals ? normals[i] : new Vector3(),
Tangent = hasTangents ? tangents[i] : new Vector3(),
Binormal = hasBinormals ? binormals[i] : new Vector3(),
TexCoord = hasTexCoords ? texCoords[i] : new Vector2()
};
var materialId = hasMaterials ? materials[i] : 0;
fbxIndexer.AddVertex(vertex, materialId, 0);
}
}
}
public void TestFbx(string filename, bool expectedIsBinary, double expectedScaleFacor, bool expectedHasTexCoord, bool expectedHasTangent, bool expectedHasBinormal)
{
var testFile = Path.Combine(PathHelper.FilesPath, filename);
Assert.True(expectedIsBinary == FbxIO.IsBinaryFbx(testFile), $"IsBinaryFbx expected {expectedIsBinary}");
var documentNode = FbxIO.Read(testFile, ErrorLevel.Strict);
var scaleFactor = documentNode.GetScaleFactor();
Assert.True(expectedScaleFacor == scaleFactor, $"ScaleFactor expected {expectedScaleFacor}");
var materialIds = documentNode.GetMaterialIds();
var geometryIds = documentNode.GetGeometryIds();
Assert.True(geometryIds.Length > 0);
var fbxIndexer = new FbxIndexer();
foreach (var geometryId in geometryIds)
{
var vertexIndices = documentNode.GetVertexIndices(geometryId);
var positions = documentNode.GetPositions(geometryId, vertexIndices);
var normals = documentNode.GetNormals(geometryId, vertexIndices);
var tangents = documentNode.GetTangents(geometryId, vertexIndices);
var binormals = documentNode.GetBinormals(geometryId, vertexIndices);
var texCoords = documentNode.GetTexCoords(geometryId, vertexIndices);
var materials = documentNode.GetMaterials(geometryId, vertexIndices);
var hasNormals = documentNode.GetGeometryHasNormals(geometryId);
var hasTexCoords = documentNode.GetGeometryHasTexCoords(geometryId);
Assert.True(expectedHasTexCoord == hasTexCoords, $"HasTexCoord expected {expectedHasTexCoord}");
var hasTangents = documentNode.GetGeometryHasTangents(geometryId);
Assert.True(expectedHasTangent == hasTangents, $"HasTangent expected {expectedHasTangent}");
var hasBinormals = documentNode.GetGeometryHasBinormals(geometryId);
Assert.True(expectedHasBinormal == hasBinormals, $"HasBinormal expected {expectedHasBinormal}");
var hasMaterials = documentNode.GetGeometryHasMaterials(geometryId);
for (var i = 0; i < positions.Length; i++)
{
var vertex = new FbxVertex
{
Position = positions[i],
Normal = hasNormals ? normals[i] : new Vector3(),
Tangent = hasTangents ? tangents[i] : new Vector3(),
Binormal = hasBinormals ? binormals[i] : new Vector3(),
TexCoord = hasTexCoords ? texCoords[i] : new Vector2()
};
var materialId = hasMaterials ? materials[i] : 0;
fbxIndexer.AddVertex(vertex, materialId);
}
}
foreach (var materialId in materialIds)
{
var materialName = documentNode.GetMaterialName(materialId);
var diffuseColor = documentNode.GetMaterialDiffuseColor(materialId);
fbxIndexer.Index(materialId, out var indexedVertices, out var indexedIndices);
}
}
