gltf_kun 0.4.0

Graph-based glTF processing library.
Documentation 
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use crate::{
    extensions::ExtensionExport,
    graph::{ByteNode, Extensions, Graph, gltf::document::GltfDocument},
    io::format::gltf::GltfFormat,
};

use super::{EXTENSION_NAME, OmiPhysicsShape, json::RootExtension};

impl ExtensionExport<GltfDocument, GltfFormat> for OmiPhysicsShape {
    fn export(
        graph: &mut Graph,
        doc: &GltfDocument,
        format: &mut GltfFormat,
    ) -> Result<(), Box<dyn std::error::Error>> {
        let Some(ext) = doc.get_extension::<Self>(graph) else {
            return Ok(());
        };

        let shapes = ext
            .shapes(graph)
            .iter()
            .map(|shape| shape.read(graph).into())
            .collect::<Vec<_>>();

        if shapes.is_empty() {
            return Ok(());
        }

        let root_extension = RootExtension { shapes };

        let extensions = format
            .json
            .extensions
            .get_or_insert_with(gltf::json::extensions::Root::default);

        extensions.others.insert(
            EXTENSION_NAME.to_string(),
            serde_json::to_value(root_extension)?,
        );

        format.json.extensions_used.push(EXTENSION_NAME.to_string());

        Ok(())
    }
}