import { Mesh } from 'three';
import type { PerspectiveCamera, Texture } from 'three';
import type { StereoMode } from '@vizor-vr/shared';
import type { IProjection } from './projection.js';
/**
 * Equirectangular projection for 360 and 180 content.
 * Creates an inverted sphere with the texture mapped on the inside.
 * For stereo content, creates two spheres on different Three.js layers
 * with UV remapping for side-by-side or top-bottom layouts.
 */
export declare class EquirectProjection implements IProjection {
    private meshes;
    private fovH;
    constructor(fovH?: number);
    createMeshes(texture: Texture, stereoMode: StereoMode): Mesh[];
    configureCamera(camera: PerspectiveCamera): void;
    update(_camera: PerspectiveCamera, _time: number): void;
    dispose(): void;
    private createSphere;
    /**
     * Remap UV coordinates for stereo content.
     * SBS: left eye uses left half (u: 0-0.5), right eye uses right half (u: 0.5-1)
     * TB: left eye uses top half (v: 0.5-1), right eye uses bottom half (v: 0-0.5)
     */
    private remapUVs;
}
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