export type ModelCameraOrbit = {
    theta: number;
    phi: number;
    radius: number;
};
export type ModelCameraTarget = {
    x: number;
    y: number;
    z: number;
};
export type ModelCameraState = {
    orbit?: ModelCameraOrbit;
    target?: ModelCameraTarget;
    fovDeg?: number;
};
export type ModelViewerCameraLike = {
    cameraOrbit?: unknown;
    cameraTarget?: unknown;
    fieldOfView?: unknown;
    getCameraOrbit?: () => unknown;
    getCameraTarget?: () => unknown;
    getFieldOfView?: () => unknown;
};
export declare const normaliseFovDeg: (value: unknown) => number | null;
export declare const formatFovDeg: (fovDeg: number) => string;
export declare const readCameraState: (viewer: ModelViewerCameraLike) => ModelCameraState | null;
export declare const formatCameraState: (state: ModelCameraState | null) => {
    cameraOrbit?: string;
    cameraTarget?: string;
    fieldOfView?: string;
};