@babylonjs/loaders
Version:
For usage documentation please visit https://doc.babylonjs.com/features/featuresDeepDive/importers/loadingFileTypes/.
57 lines • 2.52 kB
JavaScript
import { GLTFLoader } from "../glTFLoader.js";
import { registerGLTFExtension, unregisterGLTFExtension } from "../glTFLoaderExtensionRegistry.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
export 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));
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