import type { Vec2, Vec3 } from '../../math';
import type { LineStyle, Markers, PointStyle } from '../core/types';
export declare const TRIANGLE_HEIGHT: number;
export type TernaryTriple = readonly [number, number, number];
export interface TernarySeries<Metadata = Record<string, unknown>> {
    id?: string | number;
    points: readonly TernaryTriple[];
    label?: string;
    color?: string;
    markers?: Markers;
    point_style?: PointStyle | readonly PointStyle[];
    line_style?: LineStyle;
    color_values?: readonly (number | null)[];
    metadata?: Metadata | readonly Metadata[];
    visible?: boolean;
}
export interface TernaryPointProps<Metadata = Record<string, unknown>> {
    series_idx: number;
    point_idx: number;
    series_id: string | number;
    series_label: string;
    amounts: TernaryTriple;
    fractions: Vec3;
    color: string;
    color_value: number | null;
    metadata: Metadata | undefined;
}
export declare function ternary_fractions(triple: TernaryTriple, label?: string): Vec3;
export declare const ternary_to_xy: ([frac_a, frac_b, frac_c]: TernaryTriple) => Vec2;
export declare const xy_to_ternary: ([x_pos, y_pos]: Vec2) => Vec3;
export declare const inside_triangle: (fractions: Vec3, tolerance?: number) => boolean;
export interface TernaryGridLine {
    component: 0 | 1 | 2;
    value: number;
    from: Vec2;
    to: Vec2;
    outward: Vec2;
}
export declare function ternary_grid_lines(step: number): TernaryGridLine[];
export interface TernaryLayout {
    scale: number;
    to_px: (xy: readonly [number, number]) => Vec2;
    from_px: (px: Vec2) => Vec2;
}
export declare function ternary_layout(width: number, height: number): TernaryLayout;