import { GLTFLoader } from './glTFLoader-CAWEJDzf.esm.js';
import { bS as unregisterGLTFExtension, bR as registerGLTFExtension } from './index-BquY1VPT.esm.js';
import './bone-C5S4MoQw.esm.js';
import './skeleton-X3MKnhh5.esm.js';
import './rawTexture-C__B02jN.esm.js';
import './assetContainer-B4I6FuW0.esm.js';
import './objectModelMapping-CKhwyjWl.esm.js';

const NAME = "KHR_materials_dispersion";
/**
 * [Specification](https://github.com/KhronosGroup/glTF/blob/87bd64a7f5e23c84b6aef2e6082069583ed0ddb4/extensions/2.0/Khronos/KHR_materials_dispersion/README.md)
 * @experimental
 */
// eslint-disable-next-line @typescript-eslint/naming-convention
class KHR_materials_dispersion {
    /**
     * @internal
     */
    constructor(loader) {
        /**
         * The name of this extension.
         */
        this.name = NAME;
        /**
         * Defines a number that determines the order the extensions are applied.
         */
        this.order = 174;
        this._loader = loader;
        this.enabled = this._loader.isExtensionUsed(NAME);
    }
    /** @internal */
    dispose() {
        this._loader = null;
    }
    /**
     * @internal
     */
    // eslint-disable-next-line no-restricted-syntax
    loadMaterialPropertiesAsync(context, material, babylonMaterial) {
        return GLTFLoader.LoadExtensionAsync(context, material, this.name, async (extensionContext, extension) => {
            const promises = new Array();
            promises.push(this._loader.loadMaterialPropertiesAsync(context, material, babylonMaterial));
            promises.push(this._loadDispersionPropertiesAsync(extensionContext, material, babylonMaterial, extension));
            // eslint-disable-next-line github/no-then
            return await Promise.all(promises).then(() => { });
        });
    }
    // eslint-disable-next-line @typescript-eslint/promise-function-async, no-restricted-syntax
    _loadDispersionPropertiesAsync(context, material, babylonMaterial, extension) {
        const adapter = this._loader._getOrCreateMaterialAdapter(babylonMaterial);
        // If transparency isn't enabled already, this extension shouldn't do anything.
        // i.e. it requires either the KHR_materials_transmission or KHR_materials_diffuse_transmission extensions.
        if (adapter.transmissionWeight == 0 || !extension.dispersion) {
            return Promise.resolve();
        }
        adapter.transmissionDispersionAbbeNumber = 20.0;
        adapter.transmissionDispersionScale = extension.dispersion;
        return Promise.resolve();
    }
}
unregisterGLTFExtension(NAME);
registerGLTFExtension(NAME, true, (loader) => new KHR_materials_dispersion(loader));

export { KHR_materials_dispersion };
//# sourceMappingURL=KHR_materials_dispersion-CmfpeeAi.esm.js.map
