import type { EntityPosition } from "../scene/entityStore.js";
import type { NavGrid, NavPoint } from "./navGrid.js";
export interface NavConstrainProposed {
    position: EntityPosition;
    rotationY: number;
    grounded: boolean;
}
export interface NavConstrainEntity {
    position: EntityPosition;
}
export interface NavConstrainOptions {
    y?: (point: NavPoint) => number;
}
export declare function constrainToNavGrid(grid: NavGrid, options?: NavConstrainOptions): (proposed: NavConstrainProposed, entity: NavConstrainEntity) => NavConstrainProposed | null;