import { Mesh } from 'three';
import type { PerspectiveCamera, Texture } from 'three';
import type { StereoMode } from '@vizor-vr/shared';
import type { IProjection } from './projection.js';
/**
 * Flat projection for standard 2D and 3D (SBS/TB) video.
 *
 * Behaves like `object-fit: contain` — the plane preserves the video's
 * native aspect ratio and scales to fit as large as possible within the
 * viewport.  Letterbox / pillarbox bars appear only when the video and
 * container aspect ratios differ.
 */
export declare class FlatProjection implements IProjection {
    private meshes;
    /** Video aspect ratio (accounts for stereo layout). */
    private videoAspect;
    private stereoMode;
    createMeshes(texture: Texture, stereoMode: StereoMode): Mesh[];
    configureCamera(camera: PerspectiveCamera): void;
    /**
     * Scale the plane every frame to fit inside the camera frustum
     * while preserving the video's native aspect ratio (`object-fit: contain`).
     *
     * Also re-reads the video dimensions so the aspect ratio updates if
     * the source changes (e.g. adaptive streaming resolution switch).
     */
    update(camera: PerspectiveCamera, _time: number): void;
    dispose(): void;
    private createPlane;
    private remapUVs;
}
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