/**
 * NoiseGenerationUtilities
 *
 * Pure noise generation algorithms for procedural texture generation.
 * This module provides the core algorithms without any rendering/output concerns.
 *
 * Used by TexturedRectangleGenerator to create Minecraft-style pixel art textures.
 */
import { IMcpColorRGBA, NoisePatternType } from "./IMcpModelDesign";
/**
 * Parsed color with r, g, b, a components
 */
export interface ParsedColor {
    r: number;
    g: number;
    b: number;
    a: number;
}
/**
 * Simple seeded pseudo-random number generator (Mulberry32).
 * Produces deterministic sequences for consistent noise generation.
 */
export declare class SeededRandom {
    private state;
    constructor(seed: number);
    /**
     * Generate next random number in [0, 1)
     */
    next(): number;
    /**
     * Generate random integer in [min, max] inclusive
     */
    nextInt(min: number, max: number): number;
}
/**
 * Noise generation utilities - pure algorithms for procedural noise patterns.
 */
export default class NoiseGenerationUtilities {
    /**
     * Hash function to generate seed from string (djb2 algorithm)
     */
    static hashString(str: string): number;
    /**
     * Generate noise grid based on pattern type
     */
    static generateNoiseGrid(pattern: NoisePatternType, colors: ParsedColor[], factor: number, width: number, height: number, rng: SeededRandom, scale: number): ParsedColor[][];
    /**
     * Simple random noise - each pixel randomly picks from colors
     */
    static generateRandomGrid(colors: ParsedColor[], factor: number, width: number, height: number, rng: SeededRandom): ParsedColor[][];
    /**
     * Ordered dithering using Bayer matrix
     */
    static generateDitherGrid(colors: ParsedColor[], factor: number, width: number, height: number): ParsedColor[][];
    /**
     * Perlin-like noise for organic variation
     * Uses simplified value noise with interpolation and smooth color blending
     */
    static generatePerlinGrid(colors: ParsedColor[], factor: number, width: number, height: number, rng: SeededRandom, scale: number): ParsedColor[][];
    /**
     * Bilinear interpolation for smooth noise
     */
    static bilinearInterpolate(grid: number[][], x: number, y: number): number;
    /**
     * Stipple pattern - scattered dots on base color
     */
    static generateStippleGrid(colors: ParsedColor[], factor: number, width: number, height: number, rng: SeededRandom): ParsedColor[][];
    /**
     * Gradient noise - smooth transition between colors
     * Creates horizontal or vertical gradient with slight noise
     */
    static generateGradientGrid(colors: ParsedColor[], width: number, height: number, rng: SeededRandom): ParsedColor[][];
    /**
     * Linear interpolation between two colors
     */
    static lerpColor(c1: ParsedColor, c2: ParsedColor, t: number): ParsedColor;
    /**
     * Check if two colors are equal
     */
    static colorsEqual(c1: ParsedColor, c2: ParsedColor): boolean;
    /**
     * Convert parsed color to hex string
     */
    static colorToHex(color: ParsedColor): string;
    /**
     * Parse color input (string or RGBA object) to ParsedColor
     */
    static parseColorInput(input: string | IMcpColorRGBA): ParsedColor;
}