import type { Color, Position } from '@deck.gl/core';
export type { Color, Position };
/** Direction flags supported by {@link PathMarkerLayer}. */
export type PathMarkerDirection = {
    forward?: boolean;
    backward?: boolean;
};
/** One directional marker resolved against a path segment. */
export interface PathMarker<DataT = unknown> {
    /** Marker anchor position retained for legacy custom `MarkerLayer` implementations. */
    position: Position;
    /** Marker angle in screen-space degrees retained for legacy custom `MarkerLayer` implementations. */
    angle: number;
    /** Marker color. */
    color: Color;
    /** Original source datum. */
    object: DataT;
    /** Original source datum index. */
    index: number;
    /** Source metadata used by deck.gl composite-layer accessor forwarding. */
    __source: {
        object: DataT;
        index: number;
    };
    /** Path segment start used by the default pixel-sized marker layer. */
    source: Position;
    /** Path segment end used by the default pixel-sized marker layer. */
    target: Position;
    /** Marker ratio within the source/target segment. */
    percentage: number;
}
type ProjectFlat = (position: Position) => [number, number] | number[];
type AccessorValue<DataT, ValueT> = ValueT | ((datum: DataT, context: {
    index: number;
}) => ValueT);
export declare function createPathMarkers<DataT>({ data, getPath, getDirection, getColor, getMarkerPercentages, projectFlat }: {
    data: Iterable<DataT>;
    getPath?: AccessorValue<DataT, Position[]>;
    getDirection?: (datum: DataT, context: {
        index: number;
    }) => PathMarkerDirection | null | undefined;
    getColor?: AccessorValue<DataT, Color>;
    getMarkerPercentages?: (datum: DataT, context: {
        index: number;
        lineLength: number;
    }) => number[];
    projectFlat: ProjectFlat;
}): PathMarker<DataT>[];
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