/** Framework-neutral callbacks; getters read live props during a drag. */
export interface AngleDragOptions {
    step: () => number;
    change: (angle: number, event: PointerEvent) => void;
    end: (angle: number, event: PointerEvent) => void;
    dragging?: ((value: boolean) => void) | undefined;
    disposed?: (() => void) | undefined;
}
/** Clockwise bearing with zero at the top. */
export declare function bearing(dx: number, dy: number): number;
/** Snap without accumulating floating-point drift. */
export declare function snapAngle(angle: number, step: number): number;
/** Track one pointer; disposal removes listeners without committing a value. */
export declare function startAngleDrag(element: Element, event: PointerEvent, options: AngleDragOptions): () => void;