import { Extension, PropertyType, type ReaderContext, type WriterContext } from '@gltf-transform/core';
import { KHR_MATERIALS_DISPERSION } from '../constants.js';
import { Dispersion } from './dispersion.js';
/**
 * [KHR_materials_dispersion](https://github.com/KhronosGroup/gltf/blob/main/extensions/2.0/Khronos/KHR_materials_dispersion/)
 * defines dispersion on a glTF PBR material.
 *
 * ![illustration](/media/extensions/khr-materials-dispersion.jpg)
 *
 * > _**Figure:** Prisms demonstrating volumetric refraction and dispersion, for varying
 * > values of dispersion and IOR. Source: Khronos Group, rendered in Adobe Stager._
 *
 * Dispersion enables configuring the strength of the angular separation of colors (chromatic
 * aberration) transmitting through a relatively clear volume.  It is an enhancement to the
 * default `KHR_materials_volume` transmission model which assumes no dispersion.
 *
 * Properties:
 * - {@link Dispersion}
 *
 * ### Example
 *
 * ```typescript
 * import { KHRMaterialsDispersion, Dispersion } from '@gltf-transform/extensions';
 *
 * // Create an Extension attached to the Document.
 * const dispersionExtension = document.createExtension(KHRMaterialsDispersion);
 *
 * // Create Dispersion property.
 * const dispersion = dispersionExtension.createDispersion().setDispersion(1.0);
 *
 * // Assign to a Material.
 * material.setExtension('KHR_materials_dispersion', dispersion);
 * ```
 */
export declare class KHRMaterialsDispersion extends Extension {
    static readonly EXTENSION_NAME: typeof KHR_MATERIALS_DISPERSION;
    readonly extensionName: typeof KHR_MATERIALS_DISPERSION;
    readonly prereadTypes: PropertyType[];
    readonly prewriteTypes: PropertyType[];
    /** Creates a new Dispersion property for use on a {@link Material}. */
    createDispersion(): Dispersion;
    /** @hidden */
    read(_context: ReaderContext): this;
    /** @hidden */
    write(_context: WriterContext): this;
    /** @hidden */
    preread(context: ReaderContext): this;
    /** @hidden */
    prewrite(context: WriterContext): this;
}