export type PerceptionPoint = readonly [number, number];
export interface PerceptionTarget {
    readonly id: string;
    readonly position: PerceptionPoint;
    readonly priority?: number;
}
export interface PerceptionSensorOptions {
    readonly position: PerceptionPoint;
    readonly forward?: PerceptionPoint;
    readonly range?: number;
    readonly fovRadians?: number;
    readonly peripheralRadians?: number;
    readonly minConfidence?: number;
    readonly memoryDecayPerSecond?: number;
    readonly forgetBelowConfidence?: number;
}
export interface PerceptionHit {
    readonly id: string;
    readonly position: PerceptionPoint;
    readonly distance: number;
    readonly angleRadians: number;
    readonly confidence: number;
    readonly peripheral: boolean;
    readonly justEntered: boolean;
}
export interface PerceptionMemory {
    readonly id: string;
    readonly lastKnownPosition: PerceptionPoint;
    readonly confidence: number;
    readonly lastSeenSeconds: number;
    readonly seenCount: number;
}
export interface PerceptionSnapshot {
    readonly visible: readonly PerceptionHit[];
    readonly memories: readonly PerceptionMemory[];
    readonly closestVisible?: PerceptionHit;
    readonly strongestMemory?: PerceptionMemory;
    readonly enteredIds: readonly string[];
    readonly forgottenIds: readonly string[];
}
export declare class PerceptionSensor {
    private position;
    private forward;
    private readonly range;
    private readonly fovRadians;
    private readonly peripheralRadians;
    private readonly minConfidence;
    private readonly memoryDecayPerSecond;
    private readonly forgetBelowConfidence;
    private readonly memories;
    private readonly visibleLastTick;
    private elapsedSeconds;
    constructor(options: PerceptionSensorOptions);
    updateTransform(position: PerceptionPoint, forward?: PerceptionPoint): void;
    scan(targets: readonly PerceptionTarget[], deltaSeconds: number): PerceptionSnapshot;
    private evaluateTarget;
}
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