import type { TSLFloatNode, TSLFunction, TSLIntNode, TSLNode, TSLVec4Node } from '../types/tsl.cjs';
/** Integer 2D coordinate node consumed by Hilbert indexing. */
export type BlueNoiseCoordinateNode = TSLNode<'ivec2'>;
type HilbertArguments = [p: BlueNoiseCoordinateNode, level: TSLIntNode];
/** Arguments accepted by {@link blueNoise}. */
export type BlueNoiseArguments = HilbertArguments;
/**
 * Hilbert R1 Blue Noise generator with normalized float output.
 * Combines Hilbert curve spatial ordering with R1 low-discrepancy sequence
 * to produce high-quality blue noise values in [0,1] range.
 *
 * **Algorithm**
 * - Maps 2D coordinates to 1D via Hilbert curve (space-filling curve)
 * - Applies R1 sequence (low-discrepancy) for temporal stability
 * - Produces blue noise spectrum (minimal low-frequency content)
 *
 * **Use Cases**
 * - Temporal anti-aliasing (TAA) jitter patterns
 * - Dithering and ordered dithering
 * - Stochastic sampling for ray tracing
 * - Volumetric noise without banding
 *
 * This implementation-level API is intentionally internal and has no public package import.
 *
 * @function blueNoise
 * @tags WebGPU, WebGL
 * @short Hilbert R1 blue-noise scalar generator from integer coords for stable jitter/dither in TSL.
 * @category TSL
 * @tsl
 * @param {Node.<ivec2>} p 2D screen-space integer coordinates.
 * @param {Node.<int>} level Hilbert curve recursion level (typically 5-10, higher = finer pattern).
 * @returns {Node.<float>} Normalized blue noise value in [0..1].
 */
declare const hilbert_r1_blue_noisef: TSLFunction<BlueNoiseArguments, TSLFloatNode>;
/**
 * Vectorized Hilbert R1 blue noise: four decorrelated values from a single Hilbert walk.
 * The 2D coordinate is mapped to a 1D Hilbert index once, then the R1 hash is chained
 * (`x1 = kmhf(x0)`, …) so the three extra channels cost two integer ops each instead of
 * a full curve traversal. Use this when a shader needs several jitter values per pixel
 * (LOD dithering plus UV jitter, for example) — it is ~4× cheaper than four
 * {@link blueNoise} calls.
 *
 * This implementation-level API is intentionally internal and has no public package import.
 *
 * @function blueNoiseVec4
 * @tags WebGPU, WebGL
 * @short Four decorrelated blue-noise values from one Hilbert walk for multi-channel jitter.
 * @category TSL
 * @tsl
 * @param {Node.<ivec2>} p 2D integer coordinates.
 * @param {Node.<int>} level Hilbert curve recursion level (typically 5-10, higher = finer pattern).
 * @returns {Node.<vec4>} Four normalized blue-noise values in [0..1].
 */
declare const hilbert_r1_blue_noise4: TSLFunction<BlueNoiseArguments, TSLVec4Node>;
export { hilbert_r1_blue_noisef as blueNoise, hilbert_r1_blue_noise4 as blueNoiseVec4 };