import type { Vec3, RenderBounds } from "./bounds.js";
/** 3D perspective camera (the default game camera). */
export interface PerspectiveView {
    readonly kind: "perspective";
    readonly position: Vec3;
    readonly target: Vec3;
    readonly up?: Vec3;
    /** Vertical field of view in degrees. Default 55. */
    readonly fovDeg?: number;
    /** Width / height. Default 16 / 9. */
    readonly aspect?: number;
    readonly near?: number;
    readonly far?: number;
}
/** 2D / orthographic camera (top-down, side-scroller, minimap). */
export interface OrthographicView {
    readonly kind: "orthographic";
    readonly position: Vec3;
    readonly target: Vec3;
    readonly up?: Vec3;
    readonly halfWidth: number;
    readonly halfHeight: number;
    readonly near?: number;
    readonly far?: number;
}
export type CameraView = PerspectiveView | OrthographicView;
export interface Frustum {
    /** 6 inward-facing planes, packed [nx,ny,nz,d] × 6. A point p is inside plane i when nx·px+ny·py+nz·pz+d ≥ 0. */
    readonly planes: Float64Array;
    /** 8 world corners, packed xyz × [ntl,ntr,nbl,nbr,ftl,ftr,fbl,fbr]. */
    readonly corners: Float64Array;
    minX: number;
    minY: number;
    minZ: number;
    maxX: number;
    maxY: number;
    maxZ: number;
}
/** @internal */
export declare function createFrustum(): Frustum;
/** @internal */
export declare function updateFrustum(out: Frustum, view: CameraView): Frustum;
/** Conservative AABB-vs-frustum: never a false negative (may keep a corner-case that is truly outside).
 * @internal
 */
export declare function aabbInFrustum(f: Frustum, minX: number, minY: number, minZ: number, maxX: number, maxY: number, maxZ: number): boolean;
/** @internal */
export declare function sphereInFrustum(f: Frustum, cx: number, cy: number, cz: number, radius: number): boolean;
/** Sphere broad-phase reject, then the tight AABB test. Both conservative.
 * @internal
 */
export declare function boundsInFrustum(f: Frustum, b: RenderBounds): boolean;
/** Push every plane outward by `margin` (unit normals ⇒ d += margin) to form a preload/hysteresis region.
 * @internal
 */
export declare function dilateFrustum(src: Frustum, margin: number, out: Frustum): Frustum;