/**
 * Per-frame look channel shared between an event-driven capture layer (writer
 * of raw pointer deltas) and a frame-driven controller (consumer), plus the
 * latest committed pose for same-frame readers such as presence sync. Kept as
 * plain mutable state on purpose: routing per-frame deltas through a reactive
 * store would notify subscribers every frame for state no UI reads.
 */
export interface LookDeltas {
    yaw: number;
    pitch: number;
}
/** Plain JSON state of a {@link LookChannel}: the pending pixel deltas and the committed pose. */
export interface LookChannelState {
    deltaX: number;
    deltaY: number;
    yaw: number;
    pitch: number;
    verticalOffset: number;
}
export interface LookChannel {
    accumulate(dx: number, dy: number): void;
    /** Yaw/pitch deltas (radians) for this frame; clears the accumulator. */
    consume(): LookDeltas;
    setYaw(yaw: number): void;
    readYaw(): number;
    setPitch(pitch: number): void;
    readPitch(): number;
    setVerticalOffset(offset: number): void;
    readVerticalOffset(): number;
    snapshot(): LookChannelState;
    restore(next: LookChannelState): void;
}
export interface LookChannelOptions {
    /** Radians of rotation per pixel of pointer travel. */
    sensitivity: number;
    /** Clamp for the vertical offset register (e.g. peak jump height). */
    maxVerticalOffset?: number;
}
export declare function createLookChannel({ sensitivity, maxVerticalOffset }: LookChannelOptions): LookChannel;