import type { Vector2Like } from "../../core/miscellaneous/math";
import { type UIRange, type UIRangeConfig, type UIVector2Config } from "../miscellaneous/miscellaneous";
import { UIBehaviorModule } from "./UIBehaviorModule";
/**
 * Applies gravity attraction toward a point.
 *
 * Force follows inverse power law: strength / distance^exponent. Particles closer than threshold are unaffected.
 */
export declare class UIBehaviorPointGravity extends UIBehaviorModule<{
    builtin: "Matrix4";
}> {
    private centerInternal;
    private strengthInternal;
    private exponentInternal;
    private thresholdInternal;
    /**
     * @param center - Gravity center position
     * @param strength - Force multiplier range. Accepts number, tuple, or range object
     * @param exponent - Distance power exponent range. Accepts number, tuple, or range object
     * @param threshold - Minimum distance range. Accepts number, tuple, or range object
     */
    constructor(center: Vector2Like, strength: UIRangeConfig, exponent?: UIRangeConfig, threshold?: UIRangeConfig);
    /** Gravity center position */
    get center(): Vector2Like;
    /** Force multiplier range */
    get strength(): UIRange;
    /** Distance power exponent range */
    get exponent(): UIRange;
    /** Minimum distance range */
    get threshold(): UIRange;
    /** Gravity center position */
    set center(value: UIVector2Config);
    /** Force multiplier range */
    set strength(value: UIRangeConfig);
    /** Distance power exponent range */
    set exponent(value: UIRangeConfig);
    /** Minimum distance range */
    set threshold(value: UIRangeConfig);
}