import { NumericPositionSpec } from '@chsk/core';
type GetArrowPointsProps = {
    start: NumericPositionSpec;
    end: NumericPositionSpec;
    heads: [boolean, boolean];
    headWidth: number;
    headLength: number;
    stemWidth: number;
    caret?: boolean;
};
export declare const getBlockArrowPoints: ({ start, end, heads, headWidth, headLength, stemWidth, caret, }: GetArrowPointsProps) => NumericPositionSpec[];
export declare const getBlockArrowPath: (props: GetArrowPointsProps) => string;
/** compute angles for a tangent line to a circle at a given position */
export declare const getTangent: (center: NumericPositionSpec, position: NumericPositionSpec, variant?: 'left' | 'right') => {
    angle: number;
    cosAngle: number;
    sinAngle: number;
};
export declare const getArcArrowPath: ({ start, end, heads, headWidth, headLength, stemWidth, r, variant, }: GetArrowPointsProps & {
    r?: number | undefined;
    variant?: "left" | "right" | undefined;
}) => string;
export {};
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