import { IVec3, IVec4 } from '@gglib/math';
export interface AnimationData {
    /**
     * The name of this animation clip
     */
    name: string;
    /**
     * Duration of an animation clip in seconds
     */
    duration: number;
    /**
     * Type of this animation data
     */
    type: 'channels' | 'keyframes';
    /**
     * Collection of animation channels
     */
    channels?: AnimationDataChannels[];
    /**
     * Collection of animation keyframes
     */
    keyframes?: AnimationDataFrame;
}
export interface AnimationDataChannels {
    /**
     * The object id to animate with this track (node or bone id)
     */
    target: number;
    /**
     * Position channel data
     */
    translation?: AnimationDataChannel<IVec3>;
    /**
     * Rotation channel data
     */
    rotation?: AnimationDataChannel<IVec4>;
    /**
     * Scale channel data
     */
    scale?: AnimationDataChannel<IVec3>;
}
export interface AnimationDataChannel<T extends IVec3 | IVec4> {
    /**
     * Interpolation method to use when blending frames
     */
    interpolation: 'step' | 'linear' | 'cubic';
    /**
     * Animation samples
     */
    samples: AnimationDataChannelSample<T>[];
}
export interface AnimationDataChannelSample<T extends IVec3 | IVec4> {
    /**
     * Time at which to apply the transforms
     */
    time: number;
    /**
     * The frame value
     */
    value: T;
    /**
     * Input tangent value for cubic spline interpolation
     */
    ti?: T;
    /**
     * Output tangent value for cubic spline interpolation
     */
    to?: T;
}
export interface AnimationDataFrame {
    /**
     * Time at which to apply the transforms
     */
    time?: number;
    /**
     * The animation frames
     */
    samples: AnimationDataSample[];
}
export interface AnimationDataSample extends AnimationTargetPose {
    /**
     * The object id to animate with this track (node or bone id)
     */
    target: number;
}
export interface AnimationTargetPose {
    /**
     * Translation part
     */
    translation?: IVec3;
    /**
     * Rotation part
     */
    rotation?: IVec4;
    /**
     * Scale part
     */
    scale?: IVec3;
}
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