import { DfConnectorPosition, type DfPoint } from '../../../../../../ng-draw-flow.interfaces';
/**
 * Returns a unit vector (±1 on one axis, 0 on the other)
 * representing the first axial step of the edge immediately
 * after it leaves the source connector.
 *
 * ─ If the connector is **Left** or **Right**, movement is along **X**.
 * ─ Otherwise (Top / Bottom), movement is along **Y**.
 *
 * @param source      coordinates of the source connector
 * @param sourcePos   side of the source node (Left | Right | Top | Bottom)
 * @param target      coordinates of the target connector (used for direction)
 */
export declare function getPrimaryDirection(source: DfPoint, sourcePos: DfConnectorPosition, target: DfPoint): DfPoint;