Skip to main content

L3D Container Specification

General​

  • The container files' underlying format is a standard ZIP archive
  • The container file extension is .l3d

Root folder content​

In the root of the container file, the following elements are expected:

Mandatory

  • L3D-XML file, with the file name structure.xml.
  • At least one directory with .OBJ file

Optional

  • Corresponding MTL/Texture files if available
  • L3D-XSD Schema file, with the filename l3d.xsd

L3D-XML File​

  • Filename
    • The filename of the L3D-XML inside the root directory must be structure.xml.
  • The L3D-XML file is expected to be valid as follows
    • Valid XML syntax.
    • Valid against the referenced l3d.xsd, see below.
    • Invalid XMLs files may not be parsed and lead to errors.

L3D-XSD Schema​

Directories​

  • Each model has to be placed in a separate directory where the directory name matches the id of the GeometryFileDefinition which uses the model.
  • All material library and texture files have to be placed in the same directory as the corresponding model.

Model Files​

  • Supported model files
    • Version 1 of the L3D-Format only supports Wavefront .obj files, including the material files .mtl
    • From the material file the diffuse color and diffuse texture data are supported, for now.
caution

The .obj files must not contain more than one material per file.

Textures​

  • Supported texture formats
    • JPEG
    • PNG

GLDF Container​

The GLDF container specification is described here