import type { AnimationGroup } from "@babylonjs/core/Animations/animationGroup";
import type { Skeleton } from "@babylonjs/core/Bones/skeleton";
import type { ILogger } from "../Parser/ILogger";
/**
 * Convert non-additive animation group to additive animation group
 *
 * animation group must be flattened
 * @param animationGroup non-additive animation group
 * @param skeleton target skeleton
 * @param logger logger
 */
export declare function ConvertToAdditiveAnimation(animationGroup: AnimationGroup, skeleton: Skeleton, logger?: ILogger): void;