import * as THREE from 'three';
import { BaseScatterSystem, BaseScatterConfig, ChunkData } from '../core';
/**
 * Configuration for radial scatter
 */
export interface RadialScatterConfig extends BaseScatterConfig {
    /** Center point of the radial distribution */
    center: THREE.Vector3;
    /** Inner radius (creates a hole in the middle) */
    innerRadius: number;
    /** Outer radius */
    outerRadius: number;
    /** Start angle in radians */
    angleStart?: number;
    /** End angle in radians */
    angleEnd?: number;
    /** Height range for instances */
    heightRange?: [number, number];
    /** Density falloff toward center (0 = uniform, >0 = denser outside) */
    radialDensityFalloff?: number;
}
/**
 * Scatter system distributing instances in a radial/ring pattern
 */
export declare class RadialScatterSystem extends BaseScatterSystem {
    private center;
    private innerRadius;
    private outerRadius;
    private angleStart;
    private angleEnd;
    private heightRange;
    private radialDensityFalloff;
    constructor(config: RadialScatterConfig);
    protected initializeDistribution(): Promise<void>;
    protected updateChunks(): void;
    protected populateChunk(chunk: ChunkData, centerX: number, centerZ: number): void;
    /**
     * Update the radial bounds and regenerate
     */
    updateRadialBounds(innerRadius: number, outerRadius: number): void;
}
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