C# Convert FBX to glTF GLB or glTF to FBX Programmatically in .NET

readme.md

You can find all relevant details at: Convert FBX to glTF, GLB, or vice versa using C#

convert-FBX-to-glTF-GLB.cs

// Initialize Scene class object.
Scene scene = new Scene();

// Initiate FBXLoadOptions class object.
FBXLoadOptions opt = new FBXLoadOptions();

// Output all properties defined in GlobalSettings in FBX file.
opt.KeepBuiltinGlobalSettings = true;            

// Load input FBX file
scene.Open("test.FBX", opt);
    
// Export scene and embed the dependencies inside the target file.
GLTFSaveOptions options = new GLTFSaveOptions(FileContentType.ASCII);
options.EmbedAssets = true;

// Customize the name of the buffer file which defines model.
options.BufferFile = "mybuf.bin";

// Save glTF file.
scene.Save(dataDir + "glTFSaveOptions_out.gltf", options);

// OR save GLB file using KHR_binary_glTF extension
scene.Save("glTFSaveOptions_out.glb", FileFormat.GLTF_Binary);

convert-glTF-GLB-to-FBX.cs

// Initialize Scene class object
Scene scene = new Scene();

// Set glTF load options
GLTFLoadOptions loadOpt = new GLTFLoadOptions();
scene.Open("Test.gltf", loadOpt);

// Initialize FBXSaveOptions object
FBXSaveOptions saveOpts = new FBXSaveOptions(FileFormat.FBX7500ASCII);

// Save output FBX file
scene.Save("output.fbx", saveOpts);