import { type IFlowGraphBlockConfiguration } from "@babylonjs/core/FlowGraph/flowGraphBlock.js";
import { type FlowGraphContext } from "@babylonjs/core/FlowGraph/flowGraphContext.js";
import { type FlowGraphDataConnection } from "@babylonjs/core/FlowGraph/flowGraphDataConnection.pure.js";
import { FlowGraphExecutionBlock } from "@babylonjs/core/FlowGraph/flowGraphExecutionBlock.js";
import { Vector3 } from "@babylonjs/core/Maths/math.vector.pure.js";
import { type FlowGraphSignalConnection } from "@babylonjs/core/FlowGraph/flowGraphSignalConnection.pure.js";
/**
 * Configuration for a KHR event reference output.
 */
export interface IFlowGraphEventReferenceBlockConfiguration extends IFlowGraphBlockConfiguration {
    /** Stable key shared by equivalent event operations. */
    eventKey?: string;
}
/**
 * Produces the opaque reference associated with a KHR event operation.
 */
export declare class FlowGraphEventReferenceBlock extends FlowGraphExecutionBlock {
    config: IFlowGraphEventReferenceBlockConfiguration;
    private readonly _assetInverse;
    private readonly _selectionPointValue;
    private readonly _selectionRayOriginValue;
    /** Output flow activated after event values are captured. */
    readonly out: FlowGraphSignalConnection;
    /** Runtime node associated with the event. */
    readonly node: FlowGraphDataConnection<object | undefined>;
    /** Controller index associated with the event. */
    readonly controllerIndexInput: FlowGraphDataConnection<number>;
    /** Selection point associated with the event. */
    readonly selectionPointInput: FlowGraphDataConnection<Vector3>;
    /** Selection ray origin associated with the event. */
    readonly selectionRayOriginInput: FlowGraphDataConnection<Vector3>;
    /** Opaque node reference. */
    readonly nodeReference: FlowGraphDataConnection<string>;
    /** Retained controller index. */
    readonly controllerIndex: FlowGraphDataConnection<number>;
    /** Retained selection point. */
    readonly selectionPoint: FlowGraphDataConnection<Vector3>;
    /** Retained selection ray origin. */
    readonly selectionRayOrigin: FlowGraphDataConnection<Vector3>;
    /** Opaque event reference. */
    readonly value: FlowGraphDataConnection<string>;
    constructor(config: IFlowGraphEventReferenceBlockConfiguration);
    /** @internal */
    _execute(context: FlowGraphContext): void;
    /** @returns the serialized class name */
    getClassName(): string;
}