Importing from FBX

The FBX converter is a command-line tool to convert an FBX file to Harfang resources. This tool supports converting scene graph, geometries, materials and animations.

Command-Line

fbx-convert <input> [-out PATH] [-test-import] [-base-resource-path PATH]
            [-prefix PATH] [-profile PROFILE] [-shader PATH]
            [-material-policy POLICY] [-geometry-policy POLICY] [-texture-policy POLICY] [-scene-policy POLICY]
            [-scale FLOAT] [-geometry-scale FLOAT] [-fix-geometry-orientation] [-max_smoothing_angle FLOAT]
			[-calculate-normal-if-missing] [-calculate-tangent-if-missing]
            [-recalculate-normal] [-recalculate-tangent]
            [-detect-geometry-instances]
            [-quiet] [-help]
Option Shortcut Description
-out -o Output directory for the converted resource files.
-test-import Perform conversion but do not output any file.
-base-resource-path Transform references to assets in this directory to be relative.
-prefix Specify the file system prefix from which relative assets are to be loaded from.
-profile -p Material profile (default or pbr_default).
-shader -s Override the shader used by exported materials.
-all-policy All file type import policy.
-material-policy Material file import policy.
-geometry-policy Geometry file import policy.
-texture-policy Texture file import policy.
-scene-policy Scene file import policy.
-scale Factor used to scale the scene nodes.
-geometry-scale Factor used to scale exported geometries.
-fix-geometry-orientation Bake a 90° rotation on the X axis of exported geometries.
-max_smoothing_angle Maximum smoothing angle between two faces when computing vertex normals.
-calculate-normal-if-missing Compute missing vertex normals.
-calculate-tangent-if-missing Compute missing vertex tangents.
-recalculate-normal Recreate the vertex normals of exported geometries.
-recalculate-tangent Recreate the vertex tangent frames of exported geometries.
-detect-geometry-instances Detect and optimize geometry instances.
-quiet -q Quiet output.
-help -h Display help message.

The following policies are available: skip, overwrite, rename and skip_always. The default policy is skip.

Return code

The executable returns 1 if no error occurred, 0 otherwise.

To notify the caller about the conversion result the converter sends special markers to the standard output:

  • [TestImport: OK] if the import test went well.
  • [TestImport: KO] if the import test failed.
  • [ImportScene: OK] if the import succeeded.
  • [ImportScene: KO] if the import failed.

Examples

Import scene.fbx to ./export, overwrite existing geometry, skip everything else if it exists:

fbx-convert scene.fbx -o export -texture-policy overwrite

Import scene.fbx to ./export, only import scene, skip everything else:

fbx-convert scene.fbx -o export -material-policy skip_always -geometry-policy skip_always -texture-policy skip_always

A word on scale

When working with assets from different sources it is not uncommon to encounter considerable scale differences for similar objects. To compensate for this the importer can adjust both the scene scale and the geometry scale. As a rule of thumb, even if the imported scene looks on scale, you should make sure that the geometry itself uses a correct scale.

Failing to do so will pose many problems for example when sharing animations between models.

Autodesk FBX SDK Notice

This software contains Autodesk® FBX® code developed by Autodesk, Inc. Copyright 2014 Autodesk, Inc. All rights, reserved.

Such code is provided “as is” and Autodesk, Inc. disclaims any and all warranties, whether express or implied, including without limitation the implied warranties of merchantability, fitness for a particular purpose or non-infringement of third party rights. In no event shall Autodesk, Inc. be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of such code.