import { CubicBezierCurve, LineCurve } from 'three';
export interface KeyframeTangent {
    slope: number;
    accel: number;
}
export interface SearchRange {
    min: number;
    max: number;
}
export interface KeyframeData {
    pos: number;
    value: number;
    in: KeyframeTangent;
    out?: KeyframeTangent;
}
export declare enum ChannelInterpolation {
    LINEAR = "linear",
    CUBIC = "cubic"
}
export type ChannelData = {
    keyframes: KeyframeData[];
    interpolation: ChannelInterpolation;
};
export type ChannelDataByName = Record<string, ChannelData>;
export type InterpolationCurve = CubicBezierCurve | LineCurve;
export type SetCurveCallback = (keyframeStart: KeyframeData, keyframeEnd: KeyframeData) => void;
export type GetValueCallback = (pos: number) => number;