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<?xml version="1.0" encoding="UTF-8" ?>
<class name="GLTFDocumentExtension" inherits="Resource" version="4.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../doc/class.xsd">
<brief_description>
[GLTFDocument] extension class.
</brief_description>
<description>
Extends the functionality of the [GLTFDocument] class by allowing you to run arbitrary code at various stages of GLTF import or export.
To use, make a new class extending GLTFDocumentExtension, override any methods you need, make an instance of your class, and register it using [method GLTFDocument.register_gltf_document_extension].
[b]Note:[/b] Like GLTFDocument itself, all GLTFDocumentExtension classes must be stateless in order to function properly. If you need to store data, use the [code]set_additional_data[/code] and [code]get_additional_data[/code] methods in [GLTFState] or [GLTFNode].
</description>
<tutorials>
</tutorials>
<methods>
<method name="_export_node" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<param index="1" name="gltf_node" type="GLTFNode" />
<param index="2" name="json" type="Dictionary" />
<param index="3" name="node" type="Node" />
<description>
</description>
</method>
<method name="_export_post" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<description>
</description>
</method>
<method name="_export_preflight" qualifiers="virtual">
<return type="int" />
<param index="0" name="root" type="Node" />
<description>
</description>
</method>
<method name="_get_supported_extensions" qualifiers="virtual">
<return type="PackedStringArray" />
<description>
Returns an array of the GLTF extensions supported by this GLTFDocumentExtension class. This is used to validate if a GLTF file with required extensions can be loaded.
</description>
</method>
<method name="_import_node" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<param index="1" name="gltf_node" type="GLTFNode" />
<param index="2" name="json" type="Dictionary" />
<param index="3" name="node" type="Node" />
<description>
</description>
</method>
<method name="_import_post" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<param index="1" name="root" type="Node" />
<description>
</description>
</method>
<method name="_import_post_parse" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<description>
</description>
</method>
<method name="_import_preflight" qualifiers="virtual">
<return type="int" />
<param index="0" name="state" type="GLTFState" />
<param index="1" name="extensions" type="PackedStringArray" />
<description>
This callback is run first. It is used to determine if this GLTFDocumentExtension class should be used for importing a given GLTF file. If [constant OK], the import will use this GLTFDocumentExtension class.
</description>
</method>
</methods>
</class>
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