export default InstancingManager;
/**
 * An InstancingManager handles aggregating all Instanceable3DFacade descendants into
 * instancing batches. For each batch it creates a clone of the instancedThreeObject,
 * populates a pooled InstancedBufferGeometry with buffer attributes holding the world
 * matrices of all the batch's instances, and temporarily inserts that into the
 * scene to be rendered.
 *
 * As an additional "turbo" optimization, the instancing batch objects/geometries will be
 * reused untouched between rendering frames if none of the managed Instanceable3DFacade
 * objects have changed in a way that would affect the batches or world matrix attributes.
 *
 * There is a global InstancingManager automatically added to the main scene, and it does
 * nothing if there are no Instanceable3DFacades in the scene, so in most cases you should
 * not need to touch this yourself. But it is also possible to insert additional
 * InstancingManager facades further down in the scene if you wish to control the scope
 * of instancing, e.g. to increase the likelihood of the aforementioned "turbo" optimization
 * kicking in.
 *
 * Also see InstancingShaderUpgrades, which modifies material shaders so they accept the matrix
 * and custom uniform values coming in as attributes. This allows built-in materials as well
 * as custom shaders to work with instancing without manual modification.
 */
declare class InstancingManager extends Group3DFacade {
    constructor(parent: any);
    _instanceables: any;
    _batchGeometryPool: BatchGeometryPool;
    _needsRebatch: boolean;
    onNotifyWorld(source: any, message: any, data: any): void;
    _setupBatchObjects(renderer: any, scene: any, camera: any): void;
    _batchObjectsByKey: any;
    _onInstanceAdded(facade: any): void;
    _onInstanceRemoved(facade: any): void;
    _onInstanceChanged(facade: any): void;
    _onInstanceMatrixChanged(facade: any): void;
    _onInstanceUniformChanged(facade: any, uniformName: any): void;
    _getBatchKey(object: any): any;
    _batchKeysCache: any;
    _getInstanceUniformNames(object: any): any;
    _uniformNamesCache: Map<any, any>;
    _getInstanceUniformSizes(material: any, uniformNames: any): any;
    _uniformSizesCache: Map<any, any>;
    _getBatchObject(instancedObject: any): any;
    _teardownBatchObjects(renderer: any, scene: any, camera: any): void;
}
import Group3DFacade from '../Group3DFacade.js';
/**
 * Pool for the instancing batch geometries
 */
declare class BatchGeometryPool {
    _poolsByKey: any;
    borrow(key: any, baseGeometry: any, instanceUniformSizes: any): any;
    releaseAll(): void;
    disposeUnused(): void;
}