Asset Loader

The asset loading library currently supports GLTF 2.0 format.

GLTF 2.0

GLTF loader uses tiny gltf library and is based on Vulkan-glTF-PBR project by Sascha Willems.

The following features are currently supported:

• ASCII, Binary, and Embedded GLTF specifications
• Draco Mesh Compression (automatically enabled when Draco is included into the project)
• PBR Materials (Metallic-Roughness and Specular-Glossiness workflows)
• Skinning
• Extensions:
  • KHR_materials_anisotropy
  • KHR_materials_clearcoat
  • KHR_materials_sheen
  • KHR_materials_iridescence
  • KHR_materials_emissive_strength
  • KHR_materials_transmission
  • KHR_materials_volume
  • KHR_materials_unlit
  • KHR_texture_transform

The loading functionality is implemented in Diligent::GLTF::Model class that initializes all Diligent Engine objects required to render the model.

The following code snippet shows a basic usage of the loader:

GLTF::ModelCreateInfo ModelCI;
ModelCI.FileName = "MyAsset.gltf";
 
m_Model = std::make_unique<GLTF::Model>(m_pDevice, m_pImmediateContext, ModelCI);

The loader is very flexible and provides multiple ways to customize the loading process. Among others, the following parameters can be specified:

• Texture attribute configuration
• Vertex layout
• Node, Mesh, Primitive, and Material loading callbacks
• GPU resource cache

The loader does have any rendering capabilities. Please see Diligent GLTF PBR Renderer.

References

GLTF2.0 Format Specification

Vulkan-glTF-PBR

tinygltf