import type { HomogeneousProjection, HomogeneousProjectionPointN, ProjectionFibreN } from './types.js';
export type CoordinateProjectionAxes = readonly [number, number, number];
export interface CoordinateProjectionOptions {
    readonly fromDim: number;
    /** Three distinct source axes, in output x/y/z order. */
    readonly axes: CoordinateProjectionAxes;
}
/**
 * Exact coordinate-subspace projection ℝⁿ → ℝ³.
 *
 * Unlike `OrthographicProjection`, which always retains axes `[0, 1, 2]`,
 * this map makes the three retained coordinates explicit. It is useful for
 * coordinated views such as XYW without permuting or copying source data.
 */
export declare class CoordinateProjection implements HomogeneousProjection {
    readonly fromDim: number;
    readonly axes: CoordinateProjectionAxes;
    constructor({ fromDim, axes }: CoordinateProjectionOptions);
    projectPoint(point: ArrayLike<number>): [number, number, number];
    projectPositions(source: Float64Array, count: number, destination: Float32Array): void;
    homogeneousMatrix(): Float64Array;
    projectHomogeneousPoint(point: ArrayLike<number>): HomogeneousProjectionPointN;
    projectHomogeneousPositions(source: Float64Array, count: number, destination: Float64Array, validity?: Uint8Array): void;
    inverseFibre(point: ArrayLike<number>): ProjectionFibreN;
}
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