/**
 * An instance of {@link Morph}. Contains weights to assign to every {@link MorphTarget}, manages
 * selection of active morph targets.
 *
 * @category Graphics
 */
export class MorphInstance {
    /**
     * Create a new MorphInstance instance.
     *
     * @param {import('./morph.js').Morph} morph - The {@link Morph} to instance.
     */
    constructor(morph: import("./morph.js").Morph);
    /**
     * The morph with its targets, which is being instanced.
     *
     * @type {import('./morph.js').Morph}
     */
    morph: import("./morph.js").Morph;
    device: import("../index.js").GraphicsDevice;
    _weights: any[];
    _weightMap: Map<any, any>;
    _activeTargets: any[];
    shaderCache: {};
    maxSubmitCount: any;
    _shaderMorphWeights: Float32Array<any>;
    rtPositions: RenderTarget;
    rtNormals: RenderTarget;
    _textureParams: Float32Array<ArrayBuffer>;
    morphFactor: import("../index.js").ScopeId;
    zeroTextures: boolean;
    _shaderMorphWeightsA: Float32Array<ArrayBuffer>;
    _shaderMorphWeightsB: Float32Array<ArrayBuffer>;
    _activeVertexBuffers: any[];
    /**
     * Frees video memory allocated by this object.
     */
    destroy(): void;
    shader: any;
    texturePositions: any;
    textureNormals: any;
    /**
     * Clones a MorphInstance. The returned clone uses the same {@link Morph} and weights are set
     * to defaults.
     *
     * @returns {MorphInstance} A clone of the specified MorphInstance.
     */
    clone(): MorphInstance;
    _getWeightIndex(key: any): any;
    /**
     * Gets current weight of the specified morph target.
     *
     * @param {string|number} key - An identifier for the morph target. Either the weight index or
     * the weight name.
     * @returns {number} Weight.
     */
    getWeight(key: string | number): number;
    /**
     * Sets weight of the specified morph target.
     *
     * @param {string|number} key - An identifier for the morph target. Either the weight index or
     * the weight name.
     * @param {number} weight - Weight.
     */
    setWeight(key: string | number, weight: number): void;
    _dirty: boolean;
    /**
     * Generate fragment shader to blend a number of textures using specified weights.
     *
     * @param {number} numTextures - Number of textures to blend.
     * @returns {string} Fragment shader.
     * @private
     */
    private _getFragmentShader;
    /**
     * Create complete shader for texture based morphing.
     *
     * @param {number} count - Number of textures to blend.
     * @returns {import('../platform/graphics/shader.js').Shader} Shader.
     * @private
     */
    private _getShader;
    _updateTextureRenderTarget(renderTarget: any, srcTextureName: any): void;
    _updateTextureMorph(): void;
    _updateVertexMorph(): void;
    /**
     * Selects active morph targets and prepares morph for rendering. Called automatically by
     * renderer.
     */
    update(): void;
}
import { RenderTarget } from '../platform/graphics/render-target.js';