/**
 * Clip box (section / crop box) uniform packing. The box is an axis-aligned
 * world-space AABB written into the shared per-draw uniform as two vec4 lanes
 * (min.xyz + pad, max.xyz + pad); `main.wgsl` discards fragments outside it when
 * the enabled flag bit is set. Kept as a tiny pure helper so the three write
 * sites (pipeline.updateUniforms + the renderer's per-mesh and instanced
 * template loops) stay in sync and the packing is unit-testable.
 */
import type { ClipBox } from './types.js';
/** flags.y bit marking the clip box active. Must match `main.wgsl` (`& 4u`). */
export declare const CLIPBOX_ENABLED_BIT = 4;
/**
 * Write `box` into `out` at float lanes [`minFloatOffset` .. +3] (min.xyz + pad)
 * and [`minFloatOffset + 4` .. +3] (max.xyz + pad). Returns the flags.y bit to OR
 * in: {@link CLIPBOX_ENABLED_BIT} when the box is active, else 0. A disabled or
 * absent box zeroes the region so stale data from a previous draw can't clip.
 */
export declare function packClipBox(box: ClipBox | null | undefined, out: Float32Array, minFloatOffset: number): number;
//# sourceMappingURL=clip-box.d.ts.map