import type { Matrix, PathCommand, SceneShape } from "./scene.types.ts";
export declare const IDENTITY: Matrix;
/** The matrix that does `b` first and then `a`'s frame: the transform of a child inside a parent. */
export declare const multiply: (a: Matrix, b: Matrix) => Matrix;
/** The matrix that undoes `m`, or the identity when `m` flattens the plane. */
export declare function invert(m: Matrix): Matrix;
export declare const isIdentity: (m: Matrix) => boolean;
/** A point moved by a matrix. */
export declare const apply: (m: Matrix, x: number, y: number) => [number, number];
/** A `transform` attribute (`matrix`, `translate`, `scale`, `rotate`, in any run) as one matrix. */
export declare function parseTransform(text: string | undefined): Matrix;
/**
 * Path data as absolute segments: `M`, `L`, `C`, `Q` and `Z`. Relative commands, `H`, `V`, `S` and `T` are worked out, and an arc is cubic curves.
 * @example
 * ```ts
 * import { pathCommands } from "@johnmorrisdotca/kyogijo-stadiums/scene";
 * console.log(pathCommands("M0 0h10v5H0Z").map((c) => c.join(" ")));
 * // [ 'M 0 0', 'L 10 0', 'L 10 5', 'L 0 5', 'Z' ]
 * ```
 */
export declare function pathCommands(d: string): PathCommand[];
/** The segments of a shape in its own frame: a rectangle, circle, ellipse, line, polygon, polyline or path as path commands. */
export declare function shapeCommands(shape: SceneShape): PathCommand[];
/** A run of points, and whether it was closed. */
export interface Ring {
    points: [number, number][];
    closed: boolean;
}
/**
 * Segments as runs of points, curves cut into straight pieces no further than `tolerance` (in the same units) from the curve. `matrix` moves every
 * point first.
 */
export declare function flatten(commands: readonly PathCommand[], matrix?: Matrix, tolerance?: number): Ring[];
/** The box round a shape's outline (not its stroke) after `matrix`, or undefined for a shape with no points. */
export declare function boundsOf(shape: SceneShape, matrix?: Matrix): {
    x: number;
    y: number;
    w: number;
    h: number;
} | undefined;