import { Component, Scene } from '@certe/atmos-core';
import type { Mat4Type } from '@certe/atmos-math';
/** Loose interface to avoid circular import with RenderSystem. */
export interface ScreenToWorldProvider {
    screenToWorldPoint(x: number, y: number, nearClip?: number): Promise<Float32Array | null>;
}
export declare class Camera extends Component {
    fovY: number;
    near: number;
    far: number;
    isMainCamera: boolean;
    clearColor: Float32Array<ArrayBuffer>;
    skyMode: 'none' | 'procedural';
    skyZenithColor: Float32Array<ArrayBuffer>;
    skyHorizonColor: Float32Array<ArrayBuffer>;
    skyGroundColor: Float32Array<ArrayBuffer>;
    skyGroundFalloff: number;
    skySunIntensity: number;
    /** Set by RenderSystem when it activates a camera. */
    static _renderSystem: ScreenToWorldProvider | null;
    private readonly _viewMatrix;
    get viewMatrix(): Mat4Type;
    /** Compute view matrix as inverse of the camera's world transform. */
    updateViewMatrix(): void;
    /** Extract world-space position from the worldMatrix translation column. */
    getWorldPosition(out: Float32Array): Float32Array;
    /**
     * Convert screen pixel coordinates to a world-space point using GPU depth readback.
     * Returns null if the pixel is sky (depth >= 1.0) or closer than nearClip.
     */
    screenToWorldPoint(x: number, y: number, nearClip?: number): Promise<Float32Array | null>;
    /** Shortcut: get the main camera from the currently active scene. */
    static get main(): Camera | null;
    /** Find the first enabled Camera with isMainCamera=true in the scene. */
    static getMain(scene: Scene): Camera | null;
}
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