import type { IEncodeFeature } from '@antv/l7-core';
export declare function FlowHalfArrowFillTriangulation(feature: IEncodeFeature): {
    vertices: number[];
    normals: number[];
    indices: number[];
    size: number;
};
export declare function FlowLineTriangulation(feature: IEncodeFeature, symbolOption?: unknown): {
    vertices: number[];
    normals: number[];
    indices: number[];
    size: number;
};
export declare function ArrowLineTriangulation(feature: IEncodeFeature, symbolOption?: unknown): {
    vertices: number[];
    indices: number[];
    normals: number[];
    size: number;
};