/**
 * Strategy interface for different reel spinning behaviors.
 *
 * Each mode defines how symbols move during a spin frame
 * and how landing is handled.
 */
export interface SpinningMode {
    readonly name: string;
    /**
     * Compute the Y displacement for this frame.
     * @param symbolHeight - Height of one symbol in pixels.
     * @param speed - Current spin speed (pixels per frame).
     * @param deltaMs - Time since last frame in milliseconds.
     * @returns Y displacement in pixels.
     */
    computeDeltaY(symbolHeight: number, speed: number, deltaMs: number): number;
}
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