FBX Sharpie

based upon FBXWriter by Hamish Milne

https://github.com/hamish-milne/FbxWriter

Current features...

• Read and Write FBX binary files
• Read and Write FBX ASCII files
• Auto format detection
• Store and manipulate raw FBX object data
• Higher level processing of FBX nodes (In progress)
• Supports FBX versions 2006, 2009, 2010, 2011, 2012, 2013, 2014-15, 2016-17, 2018, 2019
• Ability to extract triangulated verex, tangent, normal, binormal data by geometry
• Ability to extract material diffuse color and name

Todo...

• Re-indexing of vertex data
• Optimize and organize code
• Improve how data is tokenized and stored
• Expand functionality to include camera's, lighting, animation etc

using UkooLabs.FbxSharpie;

class FbxExample
{
    static void Main(string[] args)
    {
        var path = Path.GetDirectoryName(Assembly.GetEntryAssembly().Location);
        var testFile = Path.Combine(path, "file.fbx");

        var isBinary = FbxIO.IsBinaryFbx(testFile);
        var documentNode = FbxIO.Read(testFile);

        // Scale factor usually 1 or 2.54
        var scaleFactor = documentNode.GetScaleFactor();

        var materialIds = documentNode.GetMaterialIds();
        var geometryIds = documentNode.GetGeometryIds();

        var fbxIndexer = new FbxIndexer();
        foreach (var geometryId in geometryIds)
        {
            var vertexIndices = documentNode.GetVertexIndices(geometryId);
            var positions = documentNode.GetPositions(geometryId, vertexIndices);

            var normalLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Normal);
            var tangentLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Tangent);
            var binormalLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Binormal);
            var texCoordLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.TexCoord);
            var materialLayerIndices = documentNode.GetLayerIndices(geometryId, FbxLayerElementType.Material);

            var normals = documentNode.GetNormals(geometryId, vertexIndices, normalLayerIndices[0]);
            var tangents = documentNode.GetTangents(geometryId, vertexIndices, tangentLayerIndices[0]);
            var binormals = documentNode.GetBinormals(geometryId, vertexIndices, binormalLayerIndices[0]);
            var texCoords = documentNode.GetTexCoords(geometryId, vertexIndices, texCoordLayerIndices[0]);
            var materials = documentNode.GetMaterials(geometryId, vertexIndices, materialLayerIndices[0]);

            var hasNormals = documentNode.GetGeometryHasNormals(geometryId);
            var hasTexCoords = documentNode.GetGeometryHasTexCoords(geometryId);
            var hasTangents = documentNode.GetGeometryHasTangents(geometryId);
            var hasBinormals = documentNode.GetGeometryHasBinormals(geometryId);
            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);
            }
        }

        // Example to re-index geometry based on each material
        foreach (var materialId in materialIds)
        {
            var materialName = documentNode.GetMaterialName(materialId);
            var diffuseColor = documentNode.GetMaterialDiffuseColor(materialId);
            fbxIndexer.Index(materialId, out var indexedVertices, out var indexedIndices);
        }
    }
}