import { MorphPlan } from './plan';
/** Preallocated output buffers for a plan (zero allocation per frame). */
export declare function allocOutputs(plan: MorphPlan): Float64Array[];
export declare function interpPolar(plan: MorphPlan, t: number, out: Float64Array[]): void;
/** Raw coordinate lerp (same correspondence, no decomposition). */
export declare function interpLinear(plan: MorphPlan, t: number, out: Float64Array[]): void;