import { Mesh } from 'three';
import type { PerspectiveCamera, Texture } from 'three';
import type { StereoMode } from '@vizor-vr/shared';
import type { IProjection } from './projection.js';
/**
 * Cubemap projection for standard 3x2 atlas cubemap content.
 * Creates an inverted box with each face's UVs remapped to the
 * corresponding tile in the atlas texture.
 * For stereo content, creates two boxes on different Three.js layers
 * with UV remapping for side-by-side or top-bottom layouts.
 */
export declare class CubemapProjection implements IProjection {
    private meshes;
    createMeshes(texture: Texture, stereoMode: StereoMode): Mesh[];
    configureCamera(camera: PerspectiveCamera): void;
    update(_camera: PerspectiveCamera, _time: number): void;
    dispose(): void;
    private createBox;
    /**
     * Remap UV coordinates for cubemap atlas layout, with optional stereo offset.
     *
     * BoxGeometry has 6 faces, each with 4 vertices (indices faceIndex*4 .. faceIndex*4+3).
     * Default UVs for each face span [0,1] in both U and V.
     * We remap each face to its tile in the 3x2 atlas, then apply stereo compression
     * if needed.
     *
     * For TB stereo the entire atlas occupies either the top or bottom half of the
     * texture, so V coordinates are compressed to half and offset accordingly.
     * For SBS stereo the atlas occupies either the left or right half, so U
     * coordinates are compressed to half and offset accordingly.
     */
    private remapFaceUVs;
}
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