import type { Vec2 } from '../../math';
interface Scene3DParams {
    scene_x: number;
    scene_y: number;
    scene_z: number;
    x_range: Vec2;
    y_range: Vec2;
    z_range: Vec2;
}
export declare const span_or: (span: [number | null, number | null] | undefined, range: Vec2) => Vec2;
export declare function normalize_to_scene(value: number, [min_val, max_val]: Vec2, scene_size: number): number;
export declare function create_to_threejs(params: Scene3DParams): (user_x: number, user_y: number, user_z: number) => {
    x: number;
    y: number;
    z: number;
};
export {};