import type { ComputeNode } from 'three/webgpu';
import type { TSLFloatNode, TSLStorageNode } from '../../../types/tsl.js';
/**
 * Naive O(N²) pressure force computation pass.
 * Computes pressure gradient forces using Spiky kernel.
 *
 * @param {*} positionsBuffer Particle positions buffer.
 * @param {*} densitiesBuffer Particle densities buffer.
 * @param {*} pressuresBuffer Particle pressures buffer.
 * @param {*} pressureForcesBuffer Pressure forces buffer.
 * @param {number} particleCount Number of particles.
 * @param {*} mass Particle mass uniform.
 * @param {*} h Smoothing radius uniform.
 * @param {*} spiky Spiky kernel coefficient uniform.
 * @returns {*} Compute node.
 */
export declare function computePressureForcePass(positionsBuffer: TSLStorageNode<'vec3'>, densitiesBuffer: TSLStorageNode<'float'>, pressuresBuffer: TSLStorageNode<'float'>, pressureForcesBuffer: TSLStorageNode<'vec3'>, particleCount: number, mass: TSLFloatNode, h: TSLFloatNode, spiky: TSLFloatNode): ComputeNode;