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Class for importing and exporting glTF files in and out of Godot.

GLTFDocument supports reading data from a glTF file, buffer, or Godot scene. This data can then be written to the filesystem, buffer, or used to create a Godot scene.

All of the data in a glTF scene is stored in the GLTFState class. GLTFDocument processes state objects, but does not contain any scene data itself. GLTFDocument has member variables to store export configuration settings such as the image format, but is otherwise stateless. Multiple scenes can be processed with the same settings using the same GLTFDocument object and different GLTFState objects.

GLTFDocument can be extended with arbitrary functionality by extending the GLTFDocumentExtension class and registering it with GLTFDocument via register_gltf_document_extension(). This allows for custom data to be imported and exported.

 Enum RootNodeMode<>():Enum

ROOT_NODE_MODE_SINGLE_ROOT = 0

Treat the Godot scene's root node as the root node of the glTF file, and mark it as the single root node via the GODOT_single_root glTF extension. This will be parsed the same as ROOT_NODE_MODE_KEEP_ROOT if the implementation does not support GODOT_single_root.


ROOT_NODE_MODE_KEEP_ROOT = 1

Treat the Godot scene's root node as the root node of the glTF file, but do not mark it as anything special. An extra root node will be generated when importing into Godot. This uses only vanilla glTF features. This is equivalent to the behavior in Godot 4.1 and earlier.


ROOT_NODE_MODE_MULTI_ROOT = 2

Treat the Godot scene's root node as the name of the glTF scene, and add all of its children as root nodes of the glTF file. This uses only vanilla glTF features. This avoids an extra root node, but only the name of the Godot scene's root node will be preserved, as it will not be saved as a node.

 String image_format<>():String

The user-friendly name of the export image format. This is used when exporting the glTF file, including writing to a file and writing to a byte array.

By default, Godot allows the following options: "None", "PNG", "JPEG", "Lossless WebP", and "Lossy WebP". Support for more image formats can be added in GLTFDocumentExtension classes.

 float lossy_quality<>():float

If image_format is a lossy image format, this determines the lossy quality of the image. On a range of 0.0 to 1.0, where 0.0 is the lowest quality and 1.0 is the highest quality. A lossy quality of 1.0 is not the same as lossless.

 RootNodeMode root_node_mode<>():RootNodeMode

How to process the root node during export. See RootNodeMode for details. The default and recommended value is ROOT_NODE_MODE_SINGLE_ROOT.

Note: Regardless of how the glTF file is exported, when importing, the root node type and name can be overridden in the scene import settings tab.

 Error append_from_buffer<>( PackedByteArray bytes=, bytes:PackedByteArray=, String base_path=, base_path:String=, GLTFState state=, state:GLTFState=, int flags=0, flags:int=0, ):Error

Takes a PackedByteArray defining a glTF and imports the data to the given GLTFState object through the state parameter.

Note: The base_path tells append_from_buffer() where to find dependencies and can be empty.

 Error append_from_file<>( String path=, path:String=, GLTFState state=, state:GLTFState=, int flags=0, flags:int=0, String base_path="", base_path:String="", ):Error

Takes a path to a glTF file and imports the data at that file path to the given GLTFState object through the state parameter.

Note: The base_path tells append_from_file() where to find dependencies and can be empty.

 Error append_from_scene<>( Node node=, node:Node=, GLTFState state=, state:GLTFState=, int flags=0, flags:int=0, ):Error

Takes a Godot Engine scene node and exports it and its descendants to the given GLTFState object through the state parameter.

 GLTFObjectModelProperty export_object_model_property<>( GLTFState state=, state:GLTFState=, NodePath node_path=, node_path:NodePath=, Node godot_node=, godot_node:Node=, int gltf_node_index=, gltf_node_index:int=, ):GLTFObjectModelProperty

Determines a mapping between the given Godot node_path and the corresponding glTF Object Model JSON pointer(s) in the generated glTF file. The details of this mapping are returned in a GLTFObjectModelProperty object. Additional mappings can be supplied via the GLTFDocumentExtension._import_object_model_property() callback method.

 PackedByteArray generate_buffer<>( GLTFState state=, state:GLTFState=, ):PackedByteArray

Takes a GLTFState object through the state parameter and returns a glTF PackedByteArray.

 Node generate_scene<>( GLTFState state=, state:GLTFState=, float bake_fps=30, bake_fps:float=30, bool trimming=false, trimming:bool=false, bool remove_immutable_tracks=true, remove_immutable_tracks:bool=true, ):Node

Takes a GLTFState object through the state parameter and returns a Godot Engine scene node.

The bake_fps parameter overrides the bake_fps in state.

 PackedStringArray get_supported_gltf_extensions<>():PackedStringArray

Returns a list of all support glTF extensions, including extensions supported directly by the engine, and extensions supported by user plugins registering GLTFDocumentExtension classes.

Note: If this method is run before a GLTFDocumentExtension is registered, its extensions won't be included in the list. Be sure to only run this method after all extensions are registered. If you run this when the engine starts, consider waiting a frame before calling this method to ensure all extensions are registered.

 GLTFObjectModelProperty import_object_model_property<>( GLTFState state=, state:GLTFState=, String json_pointer=, json_pointer:String=, ):GLTFObjectModelProperty

Determines a mapping between the given glTF Object Model json_pointer and the corresponding Godot node path(s) in the generated Godot scene. The details of this mapping are returned in a GLTFObjectModelProperty object. Additional mappings can be supplied via the GLTFDocumentExtension._export_object_model_property() callback method.

 void register_gltf_document_extension<>( GLTFDocumentExtension extension=, extension:GLTFDocumentExtension=, bool first_priority=false, first_priority:bool=false, ):void

Registers the given GLTFDocumentExtension instance with GLTFDocument. If first_priority is true, this extension will be run first. Otherwise, it will be run last.

Note: Like GLTFDocument itself, all GLTFDocumentExtension classes must be stateless in order to function properly. If you need to store data, use the set_additional_data and get_additional_data methods in GLTFState or GLTFNode.

 void unregister_gltf_document_extension<>( GLTFDocumentExtension extension=, extension:GLTFDocumentExtension=, ):void

Unregisters the given GLTFDocumentExtension instance.

 Error write_to_filesystem<>( GLTFState state=, state:GLTFState=, String path=, path:String=, ):Error

Takes a GLTFState object through the state parameter and writes a glTF file to the filesystem.

Note: The extension of the glTF file determines if it is a .glb binary file or a .gltf text file.


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